RU219768U1 - SHELL-SHAPED ORTHODONTIC APPARATUS - Google Patents

Abstract

The utility model relates to the field of medical instruments and relates to a shell-shaped orthodontic appliance, its design method and manufacturing method, a set and system of orthodontic appliances. The shell-shaped orthodontic appliance (10) comprises a shell-shaped body (100) provided with a cavity containing a plurality of upper teeth. The sagittal corrective element (110) is present on the lingual side of the anterior region of the conchoidal body. The sagittal corrective element is configured to correct the positional relationship of the upper and lower jaw, while at least partially compensating for the deformation of the conchoidal body caused by occlusion, and the sagittal corrective element (110) is at least partially connected to the lingual side in the anterior region shell body. The sagittal corrective element (110) has a geometric structure designed to stabilize the maxillary-mandibular occlusal relationship and reduce the deformation of the conchoidal body caused by occlusion when correcting the positions of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the required occlusal positions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority over Chinese Patent Applications No. 202010847390.1 and No. 202021759535.4, filed August 21, 2020. Each is hereby incorporated in its entirety by reference.

FIELD OF TECHNOLOGY

[0002] The present disclosure relates to the field of medical instruments and relates to a shell-shaped orthodontic appliance and its design method and method of manufacturing, a set and system of orthodontic appliances.

BACKGROUND OF THE INVENTION

[0003] According to statistics from Peking University, bad habits for the oral cavity occupy about 1/4 of the various causes of malocclusion, it is one of the most common causes of malocclusion. Deep vertical overlap of the anterior teeth is a malocclusion due to vertical heteroplasia of any of the maxillary and mandibular arches and/or the maxillary and mandibular bones. Deep vertical overlap of the anterior teeth is expressed in the fact that the incisal edge of the anterior upper teeth overlaps more than 1/3 of the length of the crown of the tooth of the anterior teeth of the lower jaw from the labial side, or in that the incisal edge of the anterior teeth of the lower jaw overlaps in the position of more than 1/3 of the crown tooth of the anterior teeth of the upper jaw from the lingual side. It is highly likely that a patient with a deep vertical overlap of the anterior teeth will bite their gum, leading to diseases such as periodontitis of the anterior teeth and diseases of the facial joints. Correction of deep vertical overlap of the anterior teeth usually determines the success of orthodontic treatment or not. The aim of correction of deep vertical overlap of the anterior teeth is to correct the steep sagittal occlusal curve of the mandible and compensate for the curve of the maxilla, in order to obtain a normal sagittal occlusal curve and the replacement curve of the normal maxillary and mandibular teeth, and to coordinate the anterior teeth in terms of the vertical overlap of the anterior teeth. and coatings. Among most malocclusion patients, correction of deep vertical overlap of anterior teeth may be the first step in orthodontic treatment procedures in general, while open occlusion is the key to correcting deep vertical overlap of anterior teeth.

[0004] Current technologies generally use a circuit maxillary orthodontic appliance to maintain the height of the anterior alveolar bone unchanged. Emphasis is placed on increasing the height of the lateral teeth. Grinding pads are installed sequentially from the last tooth so that the paired teeth are elongated to contact each other. After the lateral teeth are raised, the lingual anomaly in the position of the teeth of the anterior teeth and distal posterior teeth is corrected. An alternative horizontal guide can be provided on the lingual side of the maxillary anterior region. However, this method requires fixation on the upper jaw of a horizontal guide made of metal and resin. This not only causes hanging of some teeth, but also affects chewing in the patient wearing the apparatus. The patient may experience a strong sensation of a foreign body.

[0005] Thus, it is important to improve the structure of the invisible orthodontic appliance so as to obtain a new invisible orthodontic appliance that not only achieves the effect of maxillary removable orthodontic appliance correction or horizontal guide correction, but also has the advantages of the invisible orthodontic appliance when worn.

ESSENCE

[0006] Some embodiments of the present disclosure provide a shell orthodontic appliance, a method for designing and manufacturing the same, a set and system of orthodontic appliances. The present disclosure solves the problem of using an invisible orthodontic appliance to correct the positions of teeth in the anterior region of the mandible in a sagittal direction, reducing occlusion-induced deformation of a shell-shaped orthodontic appliance, which has not yet been achieved in existing technologies.

[0007] According to a first aspect, some embodiments of the present disclosure provide a shell orthodontic appliance, comprising a shell body provided with a cavity accommodating a plurality of upper teeth. The sagittal corrective element is present on the lingual side of the anterior region of the conchoidal body. The sagittal corrective element is configured to correct the positional relationship of the upper and lower jaw, while at least partially compensating for the deformation of the conchoidal body caused by occlusion, and the sagittal corrective element is at least partially connected to the lingual side in the anterior region of the conchoidal body. The sagittal corrective element has a geometric structure capable of stabilizing the maxillary-mandibular occlusal relationship and reducing shell body deformation caused by occlusion, while correcting the positions of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the required occlusal positions in the sagittal direction.

[0008] In this case, the sagittal corrective element contains a side wall of the receiving space and the first reinforcing element. The receiving space is formed by extending and bending the lingual side in the anterior region of the conchoidal body, and the first reinforcing element is configured to at least partially compensate for deformation of the conchoidal body caused by occlusion. The receiving space accommodates at least the incisal edge of the teeth in the anterior region of the lower jaw or the part adjacent to the incisal edge, and the end of the first reinforcing element is connected to the end of the side wall remote from the shell body.

[0009] At the same time, in the direction of the longitudinal axis of the teeth in the sagittal section, the area of the first reinforcing element that comes into contact with the lower jaw is more adjacent to the cutting edge of the anterior region of the upper jaw compared to the area of the receiving space that comes into contact with the lower jaw.

[0010] At the same time, in the sagittal section, the first intersection angle α is formed at the connection between the first reinforcing element and the side wall of the receiving space, and 90°≤α≤160°.

[0011] In this case, the connection of the first reinforcing element and the shell-shaped body is a smooth transitional curved surface.

[0012] In this case, the first reinforcing element is connected to the medial end surface of the cavity containing the first premolar tooth, both on the left and on the right side of the conchoidal body with a smooth transition.

[0013] In this case, the side of the first reinforcing element, remote from the teeth in the anterior region of the upper jaw, mainly connects the radians of the arch of the teeth in the anterior region by anastomosis.

[0014] While in the sagittal section, the first reinforcing element has a width of 2 to 5 mm in the medial-distal direction.

[0015] Herein, the receiving space is a groove continuously distributed or partly continuously distributed on the lingual side of the teeth in the anterior region of the maxilla and concave towards the palate, and the groove is configured to reduce the deformation of the conchoidal body generated towards the buccolingual side or in the sagittal direction.

[0016] At the same time, the receiving space has a height difference in the direction of the longitudinal axis of the teeth in the sagittal section, and the height difference is from 1/4 to 1/2 of the length of the dental crown of the teeth in the anterior region of the lower jaw along the direction of the longitudinal axis.

[0017] In this case, the receiving space has a width of 1.5 to 4.0 mm in the medial-distal direction in the sagittal section.

[0018] In this case, the first reinforcing element has a modulus of elasticity greater than the modulus of elasticity of the shell body.

[0019] In this case, the first reinforcing element has a hardness exceeding the hardness of the shell body.

[0020] In this case, the first reinforcing element has a Shore hardness of 65D to 80D, and the shell body has a Shore hardness of 50D to 75D.

[0021] In this case, the first reinforcing element has a multilayer structure containing a base layer and a reinforcing layer, with at least one reinforcing layer at least partially covering the base layer.

[0022] In this case, the first reinforcing element formed by the multilayer structure has a total thickness exceeding the thickness of the shell body.

[0023] In this case, the reinforcing layer has a modulus of elasticity greater than the modulus of elasticity of the base layer.

[0024] In this case, the first reinforcing element has a thickness of 0.7 to 2.0 mm, and the shell body has a thickness of 0.5 to 1.0 mm.

[0025] In this case, the first reinforcing element, the receiving space and the shell body are formed as a whole.

[0026] In this case, the second reinforcement is provided at the end of the first reinforcement extending in the distal direction, the first reinforcement and the second reinforcement are closed to form a receiving space, the first reinforcement and the second reinforcement form a second intersection angle β, wherein 90°≤ β<180°.

[0027] In this case, the accommodation space accommodates the reinforcing block.

[0028] In this case, the second reinforcing element is provided with a protrusion-trough structure corresponding to the reinforcing block.

[0029] In this case, the second reinforcing element is provided with a convex protrusion protruding in the distal direction, and the convex element corresponding to the convex protrusion is provided on the convex protrusion corresponding to the region of the reinforcing block coming into contact with the second reinforcing element.

[0030] At the same time, the side wall of the receiving space includes a medial side wall for placement and a distal side wall for placement, a part of the medial side wall for placement adjacent to the cutting edge of the upper jaw is at least partially connected to the lingual side in the anterior region of the conchoidal body, and a portion of the medial placement sidewall remote from the maxillary incisal edge is at least partially connected to an end of the distal placement sidewall. The other end of the distal side wall for placement is at least partially connected to the first reinforcing element.

[0031] In this case, the distal side wall for placement is a guiding surface, configured to guide the lower jaw to smoothly transition into the receiving space.

[0033] Here, the guide surface is a guide plane, a curved guide surface, or a combination of a guide plane and a curved guide surface.

[0033] Meanwhile, when the distal placement side wall is or partially a guide plane, a third intersection angle γ is formed by the distal placement side wall and the jaw plane in a sagittal section, with 30°≤γ≤80°.

[0034] At the same time, the medial side wall for placement is provided with a stabilizing surface with an angle of inclination, made with the possibility of providing stable occlusion of the lower jaw within the boundaries of the receiving space.

[0035] Here, the stabilizing surface is a flat stabilizing surface, a curved stabilizing surface, or a combination of a flat stabilizing surface and a curved stabilizing surface.

[0036] Meanwhile, when the distal placement side wall is or partially a guide plane, the inclination angle is the fourth intersection angle δ formed by the medial placement side wall and the jaw plane in sagittal section, where 30°≤δ≤80 °.

[0037] At the same time, the shell-like body has a geometric structure, made with the possibility of gradually changing the position of the upper teeth from the initial position to the desired correction position.

[0038] In a second aspect, in some embodiments of the present disclosure, an orthodontic system is further provided, comprising a plurality of conch-shaped orthodontic appliances. At least one of the shell orthodontic appliances is a shell orthodontic appliance according to the first aspect of the present disclosure.

[0039] In a third aspect, in some embodiments of the present disclosure, an orthodontic appliance set is further provided, comprising a maxillary orthodontic appliance and a mandibular orthodontic appliance. Wherein, the maxillary orthodontic appliance is a shell-shaped orthodontic appliance according to the first aspect of the present disclosure, and the mandibular orthodontic appliance comprises a mandibular shell-shaped body for placing lower teeth.

[0040] In a fourth aspect, some embodiments of the present disclosure further provide an orthodontic system comprising a plurality of sets of orthodontic appliances that comprise at least a set of orthodontic appliances according to the set of orthodontic appliances described in the third aspect. A plurality of sets of orthodontic appliances has a geometric shape configured to correct the position of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the desired positions in the sagittal direction, while gradually changing the position of the teeth from the initial position to the required positions.

[0041] In a fifth aspect, some embodiments of the present disclosure further provide a design method for a shell orthodontic appliance, comprising:

obtaining a digital model of teeth, including the body of the digital model of teeth; And

designing, based on a digital model of teeth, a shell-shaped orthodontic appliance in accordance with the first aspect of the present disclosure;

a designed conchoidal orthodontic appliance, comprising a conchoidal body designed based on the digital tooth model body and a sagittal corrector at least partially connected to the lingual side of the conchoidal body;

The sagittal corrector is designed with a geometric structure capable of stabilizing the maxillary-mandibular occlusal relationship and reducing shell body deformation caused by occlusion while correcting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the required occlusal positions.

[0042] In a sixth aspect, in some embodiments of the present disclosure, a method for manufacturing a shell-shaped orthodontic appliance is further provided. Here, an orthodontic appliance designed based on the design method according to the fifth aspect of the present disclosure is manufactured. The manufacturing method includes a hot forming and then cutting method or a direct 3D printing method.

[0043] Compared with the prior art, the present disclosure has the following advantages.

[0044] In the conchoidal orthodontic appliance provided by the present disclosure, a sagittal corrector is provided on the lingual side in the anterior region of the conchoidal body so as to correct the positional relationship of the maxilla and mandible while at least partially compensating for conchoidal deformation caused by occlusion. During the maxillary-mandibular interaction, the sagittal corrective element comes into contact with the mandible. The sagittal corrective element has a geometric structure capable of stabilizing the ratio of the maxillary-mandibular position and reducing the deformation of the conchoidal body caused by occlusion, while correcting the positions of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the required occlusal positions in the sagittal direction. An invisible orthodontic appliance is used to correct the position of the teeth in the anterior region of the lower jaw in the sagittal direction while reducing the deformation of the shell-shaped orthodontic appliance caused by occlusion.

[0045] The set of orthodontic appliances provided in the present disclosure includes a maxillary orthodontic appliance and a mandibular orthodontic appliance. At the same time, the maxillary orthodontic apparatus is a shell-shaped orthodontic apparatus having a sagittal corrective element. The mandibular orthodontic appliance is a shell-shaped mandibular body containing the teeth of the lower jaw. The teeth of the upper and lower jaws can be corrected synchronously. In a patient with a deep mandibular sagittal occlusal curve, the anterior teeth can be pressed or the posterior teeth can be pulled up to align the sagittal occlusal curve. Thus, when performing the maxillary-mandibular ratio correction, the maxillary and mandibular teeth are corrected, and orthopedic and orthodontic treatment is performed at the same time.

[0046] In addition, the orthodontic system provided in the present disclosure has a geometric structure consisting of a series of conch-shaped orthodontic appliances having a sagittal corrector, the geometric structure being capable of gradually changing the position of teeth from initial positions to desired positions. The orthodontic system is also capable of correcting the relative positions of the teeth in the anterior region of the mandible relative to the maxilla in the sagittal direction. The orthodontic system provided in the present disclosure may consist of a number of sets of orthodontic appliances worn simultaneously on both the maxilla and the mandible. When performing a maxillary-mandibular ratio correction, the maxillary and mandibular teeth can be gradually moved from their original positions to the desired positions.

BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG. 1 is a diagram of the construction of a shell orthodontic appliance 10 in accordance with one embodiment of the present disclosure.

[0048] FIG. 2 is a flow diagram of a method for designing a shell orthodontic appliance in accordance with one embodiment of the present disclosure.

[0049] FIG. 3 is a partial sectional view in the direction A-A' in FIG. 1.

[0050] FIG. 4 is a partial sectional view of the height difference between the receiving space and the first reinforcing element in the direction A-A' in FIG. 1, L denotes the direction of the longitudinal axis of the tooth.

[0051] FIG. 5 is a schematic representation of the maxillary-mandibular interaction trend according to one embodiment of the present disclosure, L denotes the direction of the longitudinal axis of the teeth.

[0052] FIG. 6 is a partial sectional view of a shell-shaped orthodontic appliance having a laminated first reinforcing element in accordance with one embodiment of the present disclosure.

[0053] FIG. 7 is a block diagram of a shell-shaped orthodontic appliance 20 in accordance with one embodiment of the present disclosure.

[0054] FIG. 8 is a partial sectional view in the B-B' direction of FIG. 7.

[0055] FIG. 9 is a partial sectional view of a shell-shaped orthodontic appliance having a reinforcement block in accordance with one embodiment of the present disclosure.

[0056] FIG. 10 is a structural diagram of a shell orthodontic appliance 30 in accordance with one embodiment of the present disclosure.

[0057] FIG. 11 is a partial sectional view in the C-C' direction of FIG. 10.

[0058] FIG. 12 is a schematic representation of the movement trend of the maxillary-mandibular interaction in a set of orthodontic appliances, in accordance with one embodiment of the present disclosure.

[0059] FIG. 13 is a partial sectional view of a shell-shaped orthodontic appliance comprising a guiding surface according to one embodiment of the present disclosure, P being the plane of the jaw.

[0060] FIG. 14 is a side view of a patient's skull in its original state, in accordance with one embodiment of the present disclosure.

[0061] FIG. 15 is a side view of a patient's skull after the patient has donned a shell orthodontic appliance, in accordance with one embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

[0062] In order to clarify the objectives, technical solutions and advantages of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and comprehensively disclosed below with reference to the corresponding drawings of the present disclosure. Obviously, the described embodiments of the present disclosure represent only some, but not all, embodiments of the present disclosure. All other embodiments of the disclosure obtained by those skilled in the art based on embodiments of the present disclosure without inventive work are within the scope of the present disclosure. Unless otherwise indicated, technical or scientific terms used herein have the meanings commonly understood by those skilled in the art to which this disclosure pertains. In this document, the words "comprise", "comprising" and other similar words mean that the elements or items present before the specified word include the items or items listed after the word and their equivalents, but do not exclude the presence of other elements or items.

[0063] For the case of deep vertical overlap of the anterior teeth, the main corrective treatment is the use of a maxillary removable orthodontic appliance to keep the height of the anterior alveolar bone unchanged during the orthodontic procedure. Emphasis is placed on increasing the height of the lateral teeth. Grinding pads are installed in series from the last tooth so that the paired teeth are elongated to contact each other. After increasing the height of the lateral teeth, the lingual anomaly in the position of the anterior teeth and distal lateral teeth is corrected. Alternatively, a horizontal guide may be provided on the lingual side in the anterior region of the maxilla. However, this method requires fixation on the upper jaw of a horizontal guide made of metal and resin. This not only causes hanging of some teeth, but also affects the chewing of the patient wearing the apparatus. The patient may experience a strong sensation of a foreign body. In the present disclosure, a sagittal corrector is provided on a shell-shaped orthodontic appliance. The sagittal corrective element is configured to correct the position of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the required occlusal positions in the sagittal direction. This makes it possible to at least partially compensate for the deformation of the conchoidal body caused by the occlusion. In addition, the feeling of a foreign body in the mouth is reduced, and the patient feels more comfortable.

[0064] Embodiments

[0065] FIG. 1 depicts a shell-shaped orthodontic appliance 10 in accordance with one embodiment of the present disclosure. The conchoidal orthodontic appliance 10 is configured to correct the maxillary-mandibular relationship while at least partially compensating for the deformity of the conchoidal body caused by the occlusion. Specifically, the shell-shaped orthodontic appliance 10 includes a shell-shaped body 100 provided with a cavity accommodating a plurality of teeth. In addition, a sagittal correction element 110 is provided on the conchoidal body 100. The sagittal correction element 110 is configured to correct the maxillary-mandibular relationship while at least partially compensating for the deformity of the conchoidal body caused by the occlusion. The sagittal correction element 110 is at least partially connected to the lingual side in the anterior region of the conchoidal body 100. During the interaction of the upper and lower jaw, the sagittal correction element 110 comes into contact with the lower jaw. The sagittal corrector 110 has a geometric structure configured to stabilize the maxillary-mandibular occlusal relationship and reduce occlusion-induced deformation of the conchoidal body 100 while correcting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal positions in the sagittal direction.

[0066] In one embodiment of the present disclosure, a method is provided for designing a shell-shaped orthodontic appliance 10. As shown in FIG. 2, the design method contains the following operations:

S1: obtaining a digital model of the dentition containing the digital body of the model of the dentition; And

S2: digital dental arch design of a shell orthodontic appliance 10, wherein the shell orthodontic appliance 10 comprises a designed shell body 100 based on the digital dental arch body, and a sagittal adjustment element 110 at least partially connected to the lingual side of the shell body 100, moreover, the sagittal corrector 100 is designed with a geometric structure configured to stabilize the maxillary-mandibular occlusal relationship and reduce the deformation of the conchoidal body caused by occlusion while correcting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal position in the sagittal direction.

[0067] The shell body 100 may be provided as having multiple cavities to accommodate a plurality of teeth, and is divided into an anterior region and a posterior region. Meanwhile, the "lateral region" is defined according to the classification of teeth on pages 36-38 of the second edition of "Introduction of Dentistry" published by Peking University Medical Press. The posterior region includes premolar and molar teeth, ie teeth 4 to 8, as indicated using the FDI marking method. The anterior region includes teeth 1 to 3 as indicated using the FDI marking method. The anterior region in shell body 100 is configured to accommodate central incisors, lateral incisors, and maxillary canines. The posterior region in shell body 100 is configured to accommodate maxillary first premolars and second premolars, first molars, second molars and third molars. The shell body 100 is provided with multiple cavities to accommodate a plurality of teeth, and is divided into a lingual surface, a labial surface, a medial surface, and a distal surface. In this case, the "lingual surface" is named according to the names of the surfaces of the crown of the tooth on pages 35-36 of the second edition of "Introduction of Dentistry" published by Peking University Medical Press. In this case, the surface of the tooth crown in the anterior region near the lips is called the labial surface, the surface of the tooth crown in the lateral region near the cheeks is called the buccal surface. The surface of the crown of the tooth, both in the anterior and lateral regions, close to the tongue, is called the lingual surface. The medial surface and the distal surface are the two surfaces of the crown of the tooth adjacent to the adjacent teeth combined as the proximal surfaces. The surface of the crown of the tooth near the midline of the face is called the medial surface, and the surface of the crown of the tooth, remote from the midline of the face, is called the distal surface.

[0068] FIG. 6-8 and in the description of crown surfaces on page 44 in the second edition of Tooth Anatomy and Oral Physiology, "incisal edge" means the biting portion in the shape of the anterior teeth. The anterior teeth protrude beyond a round ridge on the lingual surface, forming ridges called "incisal ridges". Anterior teeth on the labial surface are usually smooth and are referred to as "incisal". "Three-section tooth structure" is defined on page 43. To clarify the position of a certain part on the surfaces of the teeth, the surfaces of the crown of the tooth and the root of the tooth are usually divided into three equal parts. For example, the lingual surface can be divided into medial 1/3, middle 1/3, and distal 1/3. The proximal surface can be divided into buccal 1/3, middle 1/3, and lingual 1/3. The labial surface can be divided into incisal 1/3, middle 1/3 and cervical 1/3. Lateral teeth are divided into maxillary 1/3, middle 1/3 and cervical 1/3.

[0069] In one embodiment of the present disclosure, shell body 100 can be further adjusted to progressively move a plurality of teeth from rest positions to desired correction positions. In this case, the initial positions of the teeth can be understood as the initial positions of the teeth to be corrected, or the positions before any correction during an orthodontic procedure. The desired tooth correction positions can be any position closer to the desired correction positions than the original positions.

[0070] In one embodiment, in the present disclosure, as shown in FIG. 1 and FIG. 3 (sectional view in the sagittal section direction A-A'), the sagittal correction element 110 includes a side wall of the receiving space 111 formed by the extension and curvature of the lingual side in the anterior region of the conchoidal body 100. The receiving space 111 accommodates at least the incisal edge of the teeth in the anterior region of the lower jaw or the part adjacent to the cutting edge. The sagittal corrective element 110 further comprises a first reinforcing element 112 configured to at least partially compensate for the deformation of the conchoidal body caused by the occlusion. The end of the first reinforcement 112 is connected to the end of the sidewall distal to the shell body 100. More specifically, the lingual side in the anterior region of the shell body 100 curves and extends towards the wall distal to the teeth in the anterior region of the maxilla. The side wall of the receiving space 111, formed as a result of continuation and bending, can either be a smooth transitional curved surface, or be an elongated surface bounded by a polyhedron. In other words, the part of the receiving space 111 adjacent to the teeth in the anterior region of the maxilla is connected to the lingual side of the anterior region of the conchoidal body 100. The part of the receiving space 111 away from the teeth in the anterior region of the maxilla is connected to the first reinforcing element 112. the specific position of the junction of the receiving space 111 and the lingual side in the anterior region of the shell body 100 may be the part adjacent to the gingival margin on the lingual side in the anterior region of the shell body 100, or the portion adjacent to the lingual fossa and containing teeth in the anterior region of the shell body 100 In particular, the connection may start from the gingival margin on the lingual side in the anterior region of the shell body 100 to a position accommodating 1/4-1/2 of the length of the crown of the tooth in the anterior region. That is, the connection is not the gingival margin on the lingual side in the anterior region of the shell body 100, but the connection continues, starting from the part adjacent to the gingival margin on the lingual side in the anterior region of the shell body 100, or the portion adjacent to the lingual fossa containing the teeth in the anterior region of the shell body 100, to the side remote from the teeth in the anterior region of the upper jaw. The receiving space 111 accommodates at least the incisal edge of the teeth in the anterior region of the lower jaw, or a portion adjacent to the incisal edge. More specifically, "vertical overlap of the anterior teeth" means the vertical length of the upper teeth over the lower teeth. Typically, the vertical length is 1 to 3 mm. For anterior teeth, vertical overlap of the anterior teeth is normal if the vertical overlap of the anterior teeth does not exceed 1/3 of the labial surface of the incisors. Vertical overlap is deep if the vertical overlap exceeds 1/3 of the labial surface of the incisors. The degree of vertical overlap is determined by the position at which the incisal edge of the lower incisor teeth bites the lingual surface of the upper incisor teeth. Vertical overlap is normal if the incisal edge of the mandibular incisors bites 1/3 of the lingual surface of the maxillary incisors. It is a vertical overlap of the 1st degree, if the cutting edge of the incisor teeth of the lower jaw is no more than 1/3 of the lingual surface of the incisors of the upper jaw. It is a vertical overlap of the II degree, if the cutting edge of the incisor teeth of the lower jaw is no more than 1/3 of the neck of the tooth. It is a vertical overlap of the III degree, if the cutting edge of the incisor teeth of the lower jaw is more than 1/3 of the neck of the tooth. That the receiving space 111 accommodates the incisal edge of the teeth in the anterior region of the mandible, or the part adjacent to the incisal edge, may include the following conditions: 1) the incisal edge is 1/3 of the labial surface of the anterior region of the mandible, 2) the part adjacent to the incisal edge, close to 1/3 of the labial surface of the anterior region of the lower jaw, for example, between 1/4 and 1/3 or between 1/3 and 1/2, and preferably 1/4-1/3. At the same time, the vertical length of the teeth of the upper jaw above the teeth of the lower jaw does not exceed 1/3 of the labial surface of the lower jaw incisors.

[0071] In one embodiment, in the present disclosure, as shown in FIG. 4 and FIG. 5, in the direction of the longitudinal axis of the tooth in sagittal section, the area of the first reinforcement 112 that comes into contact with the lower jaw is more adjacent to the incisal edge in the anterior region of the upper jaw compared to the area of the receiving space 111 that comes into contact with the lower jaw. jaw. That is, there is a height difference Δh between the area of the first reinforcing element 112 coming into contact with the lower jaw and the area of the receiving space 111 coming into contact with the lower jaw. For a patient with deep vertical overlap after wearing a shell orthodontic appliance 10, as shown in FIG. 5, the teeth in the anterior region of the mandible first come into contact with the first reinforcing element 112. Then, along with the occlusal movements of the upper and lower jaws, the incisal edge of the teeth in the anterior region of the mandible enters the receiving space 111, i.e., to come into contact with the receiving space 111. In addition, the position at which the teeth in the anterior region of the lower jaw finally stably come into contact with the upper jaw is the most distant position of the receiving space 111 from the incisal edge of the teeth in the anterior region of the upper jaw. The height difference Δh may allow the incisal edge of the teeth in the anterior region of the mandible to be accommodated in the receiving space 111. The position of the teeth in the anterior region of the mandible is corrected relative to the maxilla to the desired occlusal positions in the sagittal direction. The required occlusal positions are those where the vertical length of the maxillary teeth over the mandibular teeth does not exceed 1/3 of the labial surface of the mandibular incisors.

[0072] In one embodiment of the present disclosure, as shown in FIG. 3, in sagittal section, the first intersection angle α is formed by connecting the first reinforcing element 112 and the free end of the side wall of the receiving space 111, with 90° ≤ α ≤ 160°. In particular, one form may be that the first intersection angle α is 90°. In this case, the first reinforcing element 112 and the free end of the side wall of the receiving space 111 are perpendicular to each other. Alternatively, the intersection angle can be any angle greater than 90° and less than or equal to 160°. That is, the first intersection angle α formed by the connection between the first reinforcing member 112 and the side wall of the receiving space 111 is an obtuse angle. The first angle falls within the range of 90°≤α≤160°. The first reinforcing element 112 extends along the side away from the tooth in the anterior region of the maxilla. Thus, if the first reinforcing element 112 comes into contact with the lower jaw, a guide surface can be formed to guide the sliding of the lower jaw into the receiving space 111. When the upper and lower jaws interact with each other, the lower jaw tends to move towards the desired sagittal occlusal position. direction relative to the position of the upper jaw.

[0073] In one embodiment of the present disclosure, the connection between the first reinforcing element 112 and the shell body 100 is a smooth transitional curved surface. More specifically, the connection between the free end of the first reinforcement element 112 extending in the distal direction and the shell body 100 is a smooth transitional curved surface. Thus, this results in the existence of a transitional curved surface at the connection between the free end of the first reinforcement element 112 extending in the distal direction and the shell body 100. 111. In this case, the side of the first reinforcing element 112, adjacent to the teeth in the anterior region of the upper jaw, is the end in the medial direction. The free end of the first reinforcing element 112, continuing in the distal direction, is the side adjacent to the teeth in the anterior region of the upper jaw relative to the first reinforcing element 112, is the side continuing in the direction opposite to the end in the medial direction. The free end of the first reinforcing element 112, extending in the distal direction, may be a free end crossing the front region from both the left and right sides of the shell body 100 for connection. The connection between the free end and the left and right sides of the shell body 100 is a smooth transitional curved surface. Thus, the surface of the shell-shaped orthodontic appliance 10 that comes into contact with the oral cavity is soft or smooth. This causes less foreign body sensation in the patient and is more comfortable for the patient wearing it. In the example, the first reinforcement 112 extends distally from the anterior region of the shell body 100 along the free end of the side wall of the receiving space 111. a smooth transitional curvilinear surface. More specifically, the connection between the first reinforcing element 112 and the distal surface of the cavity containing the first premolar tooth on both left and right sides of the shell body 100 is a smooth transitional curved surface. That is, the connection between the first reinforcing element 112 and both left and right sides of the conchoidal body 100 is a connection starting from the medial surface of the cavity containing the first premolar tooth. More specifically, the first premolar tooth has a buccal cusp and a lingual cusp on the occlusal surface, although the canine has only a cusp on the occlusal surface. Thus, with a smooth transition, the joint width (i.e., the medial-distal sagittal width of the first reinforcing element 112) between the first reinforcing element 112 and the shell body 100 can partially solve the problem of non-smooth connection caused by the difference between the canine and the first premolar tooth with taking into account occlusal surfaces. That is, the first reinforcing element 112 is connected to the medial surface of the shell body 100 containing the first premolar tooth to fill the canine region or partially compensate for the placement of the occlusal surface, so as to achieve a smooth connection transition.

[0074] In one embodiment of the present disclosure, in sagittal section, the first reinforcing element 112 has a width of 2 to 5 mm in the medial-distal direction. Said width can cause the lower jaw to come into contact with the first reinforcing element 112 first when the lower jaw comes into contact with the upper jaw so as to guide the lower jaw into the receiving space 111 and the lower jaw tends to move towards the desired occlusal position in the sagittal direction relative to position of the upper jaw. At the same time, the specified width makes the width of the sagittal corrective element 110, covering the upper jaw, small. This not only reduces the sensation of a foreign body in the cavity of the tooth for the patient, but also facilitates the manufacture of the shell-shaped orthodontic appliance 10. This reduces the use of information about the maxillary palate. When collecting information in the cavity of the patient's tooth, you can use the traditional method of obtaining an intraoral model. Scanning can then be performed to obtain the corresponding digital information. Alternatively, an intraoral scanner can be used to obtain intraoral information. In these two production methods, the design and manufacture of the corresponding product can be completed using only the information about the teeth of the upper jaw and partial information related to the gums.

[0075] In one embodiment of the present disclosure, as shown in FIG. 1, the side of the first reinforcing member 112 away from the teeth in the anterior region of the maxilla generally anastomoses the radians of the arch of the teeth in the anterior region. In particular, the general anastomosis provides that the side of the first reinforcing element remote from the teeth in the anterior region of the maxilla has a radian of arc corresponding to the radian of the arc of the teeth in the anterior region, that the side of the first reinforcing element remote from the teeth in the anterior region of the maxilla has a radian of arc similar to that of the teeth in the anterior region, and that the range of variation of such a radian of arc is ±10°. Due to this, the side of the first reinforcing element, remote from the teeth in the anterior region of the upper jaw, has a concave shape of the bend in the direction of the incisor teeth, being similar to that of the teeth in the anterior region. This position preserves a relatively large tongue space when the patient is wearing the appliance and results in little foreign body sensation during maxillary mandibular ratio correction.

[0076] In one embodiment, in the present disclosure, the first reinforcement 112 has a modulus greater than that of the shell body 100. The first reinforcement 112 has a large elastic modulus so as to at least partially compensate for the deformation of the shell body 100 caused by occlusion. Thus, when performing maxillary occlusion, the mandible first comes into contact with the first reinforcing element 112. In this case, the first reinforcing element 112 requires strength sufficient to withstand the generated occlusal force. Thus, the first reinforcing member 112 has a modulus greater than that of the shell body 100. In addition, the modulus of elasticity of the shell body 100 is low so as to be more comfortable for the wearer. It should be noted that the shell body 100 may have a geometric structure that causes relative displacement with respect to the teeth it houses, or the shell body 100 may only have the function of housing teeth. In one example of the present disclosure, the hardness of the first reinforcement 112 is greater than that of the shell body 100. For example, the first reinforcement 112 has a Shore hardness of 65D to 80D, including but not limited to the Shore hardness of the first reinforcement 112 being any of 65D, 70D, 75D, 80D, or any other value within the specified range, or any two values are within the boundary of the upper part of the specified range range. For example, the Shore hardness of shell body 100 is between 50D and 75D, including but not limited to Shore hardness of shell body 100 being any of 50D, 55D, 60D, 65D, 70D, 75D, or any other value within the specified range, or any two values within the boundary of the upper part of the specified range. This position when performing the maxillary occlusion can provide the first reinforcing element 112 enough to generate an occlusal force to support and come into contact with the lower jaw, so as to reduce the occlusal deformation caused by the first reinforcing element 112 and the conchoidal body 100. In another embodiment of the present disclosure, as shown in FIG. 6, the first reinforcing element 112 has a multilayer structure. At least one reinforcing layer 1121 at least partially covers the base layer. In this case, the base layer and the reinforcing layer 1121 may consist of the same material or different materials. The base layer may be composed of the same material as the shell body 100 and/or the receptacle 111. Alternatively, the base layer, the shell body 100 and the receptacle 111 are integrally formed. Preferably, the modulus of elasticity of the reinforcement layer 1121 is greater than the modulus of elasticity of the base layer. That is, the reinforcement layer 1121 may have the function of resisting the occlusal force produced by the deformation of the conchoidal body 100 when performing the maxillary occlusion. In this embodiment, the thickness of the first reinforcement 112 is 0.7 to 2.0 mm, including but not limited to any of 0.7 mm, 1.0 mm, 1.5 mm, 2.0 mm, or any other value within the specified range, or any two values within the upper limit of the specified range. The shell body 100 has a thickness of 0.5 to 1.0 mm, including but not limited to 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm, or any other value is within the specified range, or any two values are within the boundary of the upper part of the specified range. Within this range, the sandwich structure forms a first reinforcing element 112 having a total thickness greater than that of the conchoidal body 100. Due to this, the first reinforcing element 112 has sufficient strength to withstand the occlusal force generated, and the interaction between the teeth and the conchoidal body 100 containing the teeth makes more comfortable for the patient wearing the device.

[0077] In one embodiment of the present disclosure, the first reinforcement 112 and the shell body 100 are composed of the same material. For example, the material may be one of polyethylene terephthalate glycol (PETG), polycarbonate (PC), or thermopolyurethane (TPU), or may be another high molecular weight material that is safe for use in a medical instrument and used in the oral cavity in order to have a dental correction effect in safe wearing time. In another embodiment of the present disclosure, the first reinforcing element 112 and shell body 100, respectively, consist of various types of single-component materials or various types of multilayer composites. More specifically, if the first reinforcement 112 and the shell body 100 are composed of different types of one-component materials, they can be any two of PETG, PC, or TPU. Meanwhile, different materials may be selected when designing or manufacturing the first reinforcement 112 and the shell body 100. For example, the material for the shell body 100 is TPU, and the material for the first reinforcement 112 may be PETG. In this case, the film used can be produced by hot forming with individual regions made from different materials. Alternatively, different materials can be used for different individual areas in 3D printing. If the first reinforcement 112 is a multilayer composite of a species other than those in the shell body 100, the first reinforcement 112 may be a multilayer composite formed using any combination of PETG, PC, or TPU. For example, the first reinforcing element 112 may be composed of a multilayer composite, while the shell body 100 is composed of a single component material. Alternatively, the first reinforcing element 112 may be composed of a single component material while the shell body 100 is composed of a multi-layer composite. Additionally, both the first reinforcing element 112 and the shell body 100 are composed of multilayer composites. More specifically, the first reinforcing element 112 is composed of a different multilayer composite than that in the shell body 100. For example, the shell body 100 is composed of a single layer structure or a multilayer composite, while the first reinforcement element 112 is composed of a multilayer composite. In this case, one of the layers of the multilayer structure in the first reinforcing element 112 may be the same as in the shell body 100, or different from that. For example, the first reinforcement element 112 may be composed of a two-layer composite, to be precise, PETG and TPU, while the material of the shell body 100 may be PETG. In another example, the first reinforcement element 112 may be composed of a two-layer composite, to be precise, PETG and TPU, while the shell body 100 is composed of a two-layer composite, to be precise, PETG and PC. These examples are just some of the preferred embodiments. All combinations of materials capable of achieving the effect of this disclosure fall within the scope of this disclosure, which is not further illustrated by the examples herein.

[0078] In one embodiment of the present disclosure, as shown in FIG. 7 and FIG. 8 (the sagittal section is a section along B-B'), a second reinforcing element 113 is provided at the end of the first reinforcing element 112 of the shell orthodontic appliance 20, continuing in the distal direction. The first reinforcing element 112 and the second reinforcing element 113 are closed, forming a receiving space. The first reinforcing element 112 and the second reinforcing element 113 have a second intersection angle. The first reinforcement 112 continues distally along the sagittal section, while the second reinforcement 113 continues in a direction forming a second angle of intersection with the first reinforcement 112. That is, the first reinforcement 112 and the second reinforcement 113 continue in different directions. . In a preferred embodiment, the second intersection angle is β, with 90° ≤ β < 180°. Thus, the second reinforcing element 113 is a flat or curved radian structure, and the first reinforcing element 112 is a flat or curved radian structure. Meanwhile, if the first reinforcement 112 and the second reinforcement 113 are flat, the intersection angle of the first reinforcement 112 and the second reinforcement 113 is the second intersection angle formed by the continuation of the first reinforcement 112 and the second reinforcement 113. If the first reinforcement 112 and the second reinforcement 113 are curved surfaces with radians, the intersection angle of the first reinforcement 112 and the second reinforcement 113 is the second intersection angle formed by tangents in the continuation directions of the connection points. If the first reinforcing element 112 or the second reinforcing element 113 is a curved surface with a radian while the other surface is a plane, the intersection angle is the second intersection angle formed by the direction extending the plane and the tangent direction when connecting the curved surface and the plane . The second angle β has a range of 90°≤β<180°. At this position, when the second intersection angle β is 90°, i. e. parts of the first reinforcing element 112 and the second reinforcing element 113 are perpendicular, with maxillary occlusal movements, the teeth in the anterior region of the lower jaw gradually smoothly pass into the receiving space 111 from the area in which the teeth in the anterior region of the lower jaw come into contact with the first reinforcing element 112 , and the second reinforcing element 113 and the first reinforcing element 112 are closed, forming a receiving space. In the direction of the sagittal section, the second reinforcing element 113 provides a direct acting force in the direction of the longitudinal axis of the teeth, or an acting force that is divided in this direction, enhancing the support function of the first reinforcing element 112 during maxillary occlusion, and helping to partially compensate for the deformation of the conchoidal body caused by occlusion . In order to provide strong support, in some preferred embodiments, as shown in FIG. 9-11 (the sagittal section is a section along C-C'), the formed containing space is further provided with a reinforcement block 114. The reinforcement block 114 may be a reinforcement block used for intraoral medical device materials, for example, the reinforcement block may be formed by filling medical polymer resin or pre-casting the structure of polymer material. In order to achieve a stable ratio of the reinforcement block 114 within the receiving space, the reinforcement block 114 and the second reinforcement element 113 are provided with an appropriate ridge-trough structure. As shown in FIG. 10 and FIG. 11, in the preferred embodiment, the second reinforcement 113 of the shell orthodontic appliance 30 is provided with a distally projecting bulge 1131, and the bulge corresponding to the bulge 1131 is provided on the bulge 1131 corresponding to the area of the reinforcement block 114 coming into contact with the second reinforcement 113. Matching these two causes the reinforcement block 114 to be stably placed in the receiving space formed by the first reinforcement 112 and the second reinforcement 113. This can prevent the patient from swallowing the reinforcement block 114 by mistake due to unstable alignment of the two and prevents unnecessary medical accidents. The concave-convex correspondence is only a preferred example. Any other structures capable of providing stability to the second reinforcing element 113 and the reinforcing block 114 are within the scope of the present disclosure, which is not further illustrated by examples herein.

[0079] In one embodiment of the present disclosure, the receiving space 111 is a structure continuously distributed or partially continuously distributed on the lingual side of the teeth in the anterior region of the maxilla and concave towards the palate. Such a concave structure is capable of effectively accommodating at least some of the teeth in the anterior region of the maxilla, thereby adjusting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal positions in the sagittal direction. In addition, if the receiving space 111 is a structure continuously distributed on the lingual side of the teeth in the anterior region of the maxilla and concave towards the palate, as shown in FIG. 12, the concave structure formed by the receiving space 111 can be considered as a continuous ridge structure, configured to reduce the deformation of the conchoidal body 100 in the buccal-lingual lateral direction or in the sagittal direction. More specifically, in a maxillary-mandibular occlusion, when the teeth in the anterior region of the mandible come into contact with the shell orthodontic appliance, the teeth in the anterior region of the mandible act on the first reinforcement element 112 of the shell orthodontic appliance and then enter their desired positions, i. receiving space 111. In this case, the lower jaw creates an occlusive force in the direction of the sky. If the strength of the first reinforcing element 112 or the receiving space 111 that comes into contact with the lower jaw is low, the shell body 100 may form a sagittal deformity. For example, stretching on the lingual side in the anterior region of the shell body 100 may indirectly cause the shell body 100 corresponding to the teeth in the anterior region to cause a pinching effect. Under other conditions, deformity may occur on the buccal-lingual side. For example, when the mandible and the first reinforcing member 112 come into contact with each other, the shell body 100 causes a sagittal deformity, and movement of both sides containing teeth in the posterior region of the shell body 100 towards the lingual side is possible. Accordingly, an unexpected tilt towards the tongue or an unexpected contraction of the dental arch towards the placed teeth may occur. If the receiving space 111 is a structure continuously distributed on the lingual side of the teeth in the anterior region of the maxilla and concave in the gingival direction, the receiving space 111 may be a plurality of structures distributed on the lingual side of the teeth in the anterior region of the maxilla and concave in the direction of the gum. The concave structure as such is configured to accommodate at least a partial region (eg, the region adjacent to the incisal edge) of the teeth in the anterior part of the lower jaw. For example, the receiving space 111 may be provided on different sides, respectively, accommodating six concave structures including two central incisors, two lateral incisors, and two canines. The six concave structures align with the corresponding mandibular teeth, or an orthodontic appliance that accommodates the corresponding mandibular teeth. In a preferred example, the concave structure is an arc. If the archwire comes into contact with the teeth in the anterior mandible, the archwire accommodates the part of the teeth in the anterior mandible adjacent to the incisal edge. In this case, the teeth in the anterior region of the lower jaw are adjusted relative to the upper jaw to the height of the required occlusal positions in the sagittal direction. That is, the vertical length of the upper teeth above the lower teeth does not exceed 1/3 of the labial surface of the lower jaw incisors, and the teeth of the upper jaw correspond to the required occlusal positions of the lower jaw. More specifically, the receiving space 111 has a height difference Δh in the direction of the longitudinal axis of the teeth in the sagittal section, and the height difference is 1/4-1/2 of the length of the crown of the tooth in the direction of the longitudinal axis of the teeth in the anterior part of the mandible. In this case, the design can be appropriately performed in accordance with the required correction positions of the patient so that when the lower jaw closes to the required correction positions, the vertical length of the upper teeth above the lower teeth does not exceed 1/3 of the labial surface of the lower jaw incisor. Thus, a correction of the deep vertical overlap of the anterior teeth is achieved. In another embodiment, the receiving space 111 has a width of 1.5 to 4.0 mm in the medial-distal direction in sagittal section. The width range corresponds to the width of the sagittal section corresponding to the teeth of the anterior part of the lower jaw in the medial-distal direction. That is, the width range can well accommodate the corresponding width of the teeth in the anterior region of the mandible, so that the teeth in the anterior region of the mandible can be kept stable in the receiving space 111. location.

[0080] In one embodiment of the present disclosure, the receptacle space 111 has a modulus of elasticity greater than the modulus of elasticity of the shell body 100. In this case, in a maxillary-mandibular occlusion, when the mandible comes into contact with the receptacle space 111, stably coming into contact with the maxilla , the receiving space 111 requires sufficient strength to support the occlusal force produced. Therefore, the receiving space 111 has a modulus of elasticity greater than that of the shell body 100. In addition, the modulus of elasticity of the shell body 100 is low so as to be more comfortable for the patient wearing the apparatus. It should be noted that the shell body 100 may have a geometric structure that causes a relative offset to the teeth it encloses, or the shell body 100 may only have the function of enclosing teeth. In one embodiment of the present disclosure, the hardness of the receiving space 111 is greater than the hardness of the shell body 100. For example, the receiving space 111 has a Shore hardness of 65D to 80D, including, but not limited to, the Shore hardness of the receiving space 111 is any of 65D, 70D, 75D, 80D, or any other value within the specified range, or any two values within the upper limit of the specified range. For example, the Shore hardness of shell body 100 is between 50D and 75D, including, but not limited to, the Shore hardness of shell body 100 is any of 50D, 55D, 60D, 65D, 70D, 75D, or any other value within the specified range. , or any two values within the bounds of the upper part of the specified range. The position when performing the maxillary occlusion may allow the receptacle space 111 to be sufficient to produce an occlusal force due to mandibular support and contact so as to reduce occlusal distortion caused by the receptacle space 111 and the shell body 100. In another embodiment of the present disclosure, the receptacle space 111 is a multilayer structure. The multilayer structure contains a base layer and at least one reinforcing layer. In this case, the base layer and the reinforcing layer may consist of the same material or different materials. The base layer may be composed of the same material as the shell body 100. Alternatively, the base layer and the shell body 100 are integrally formed. Preferably, the modulus of elasticity of the reinforcing layer is greater than the modulus of elasticity of the base layer. That is, the reinforcement layer is capable of having the function of preventing the occlusal force generated by the deformation of the conchoidal body 100 when performing maxillary occlusion. In this embodiment, the thickness of the receiving space 111 is 0.7 to 2.0 mm, including, without limitation, any of 0.7 mm, 1.0 mm, 1.5 mm, 2.0 mm, or any other value within the specified range, or any two values within the limits of the upper part of the specified range. The shell body 100 has a thickness of 0.5 to 1.0 mm, including but not limited to 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm or any other value within the specified range, or any two values within the upper bounds of the range. Within this range, the sandwich structure forms a receptacle 111 with a total thickness greater than that of the conchoidal body 100. As a result, receptacle space 111 has sufficient strength to support the generated occlusal force, helping to partially compensate for the deformation of the conchoidal body caused by occlusion. Meanwhile, the interaction between the teeth and the shell body 100 containing the teeth makes it more comfortable for the wearer.

[0081] In one embodiment of the present disclosure, as shown in FIG. 13, the side wall of the receiving space 111 includes a medial side wall 1112 for placement and a distal side wall 1111 for placement. The placement side of the medial side wall 1112 adjacent to the incisal edge of the maxilla is at least partially connected to the lingual side in the anterior region of the shell body 100. The side of the medial side wall 1112 to be accommodated away from the incisal edge of the maxilla is at least partially connected with the end of the distal side wall 1111 for placement. The other end of the distal side wall 1111 for placement is at least partially connected to the first reinforcing element 112. In one embodiment, the side of the medial side wall 1112 for placement adjacent to the incisal edge of the maxilla is continuously connected to the lingual side in the anterior region of the shell body 100 , increasing the stability of the receiving space 111 when performing maxillary occlusion. In another embodiment, the side of the medial side wall 1112 for placement adjacent to the incisal edge of the maxilla is partially connected to the lingual side in the anterior part of the shell body 100. In particular, the partial connection can be made, being divided, forming a separation gap or separation hole. This position guarantees the stability of the maxillary-mandibular occlusion, while improving the breathing ability of the patient wearing the apparatus, while keeping bacteria out of the patient's dental cavity due to prolonged wear and a sealed environment. In another embodiment of the present disclosure, the side of the medial placement sidewall 1112 away from the maxillary incisal edge is continuously connected to the end of the distal placement sidewall 1111, improving the stability of the receiving space 111 when performing maxillary mandibular occlusion. In another embodiment, the side of the medial placement sidewall 1112 distal to the maxillary incisal edge is partially connected to the end of the distal placement sidewall 1111 to form a separation gap or separation opening. This position provides stability to the maxillary-mandibular occlusion while improving the breathing ability of the wearer while keeping bacteria out of the patient's dental cavity due to prolonged wear and a sealed environment. In another embodiment of the present disclosure, the other end of the distal side wall 1111 for placement is continuously connected to the first reinforcement 112, increasing the stability of the receiving space 111 when performing maxillary occlusion. In another embodiment, the other end of the distal placement sidewall 1111 is partially connected to the first reinforcement 112 to form a separation gap or separation opening. This position provides stability to the maxillary-mandibular occlusion while improving the breathing ability of the wearer while keeping bacteria out of the patient's dental cavity due to prolonged wear and a sealed environment. Based on the above embodiments, a specific choice of continuous or partial connection can be made for certain parts according to practical needs for corrections that correction effects can achieve while improving patient comfort and oral environment. Alternatively, a flat or curved structure may further be provided between the placement sidewall 1112 and the distal placement sidewall 1111. The flat or curvilinear structure corresponds to the incisal edge or incisal ridge in the teeth in the anterior region of the mandible, so as to better place and stabilize relative positions in the anterior region of the mandible.

[0082] In one embodiment of the present disclosure, the distal placement sidewall 1111 is an angled guide surface guiding the mandible into the receiving space 111. Wherein the guide surface is a guide plane, a curved guide surface, or a combination of a guide plane and a curved guide surface. guide surface. If the guide surface is flat as shown in FIG. 13, once the anterior mandibular teeth come into contact with the first reinforcement 112, the guiding surface guide allows the anterior mandibular teeth to slide into the receiving space 111 while guiding the position of the anterior mandibular teeth relative to the maxilla to the desired height. occlusal positions in the sagittal direction. In another embodiment of the present disclosure, the guide surface may further be a curved guide surface, with a radian. The curved guide surface may be a curved structure having only a radian segment, or a curved structure formed by connecting a plurality of radian segments, or a structure formed by connecting a flat surface and a curved surface. For example, either the connection of a flat surface with the first reinforcing element 112 or a curved surface with the first reinforcing element 112 directs the movement. falls within the protection scope of this disclosure. The connection location ratio of the multiple connection methods is not defined in detail herein. In the preferred embodiment of the present disclosure, when the distal placement side wall 1111 is or partially a guide surface, the angle of inclination is the third intersection angle γ formed by the distal placement side wall 1111 and the jaw plane in sagittal section, with 30°≤γ≤ 80°. The third formed intersection angle γ is an acute angle. The tilt angle is configured to guide the teeth in the anterior region of the lower jaw moving smoothly into the receiving space 111 to the upper border (i.e., the position of the receiving space 111 furthest from the cutting edge of the teeth of the anterior region of the upper jaw) of the receiving space 111, and the teeth in the anterior region of the mandible is relatively stable in the receiving space 111 in terms of positions. In another preferred embodiment of the present disclosure, the medial side wall 1112 for placement is further provided with a stabilizing surface with an angle of inclination capable of allowing the mandible to occupy a stably closed position in the receiving space 111. More specifically, the stabilizing surface is a combination of a flat stabilizing surface, a curved stabilizing surface or a combination of a flat stability surface and a curved stability surface. The stabilizing surface may be a curved structure having only a radian segment, or a curved structure formed by directly connecting a plurality of radian segments, or a structure formed by connecting a flat surface and a curved surface. For example, the connection of either a flat surface with the lingual side of the anterior region of the shell body 100 or a curved surface with the lingual side of the anterior region of the shell body 100 directs movement. the height of the required occlusal positions in the sagittal direction falls within the scope of the present disclosure. The ratio of the location of the connection of several methods of combination in the present document is essentially not defined. In a preferred embodiment of the present disclosure, when the medial placement side wall is or partially a guide surface, the angle of inclination is the fourth intersection angle δ formed by the medial placement side wall and the jaw plane in sagittal section, where 30°≤γ≤ 80°. The fourth intersection angle δ is an acute angle. The tilt angle is designed to stably prevent the teeth in the anterior region of the lower jaw from smoothly moving into the receiving space 111 to the upper border (i.e., the position of the receiving space 111 furthest from the cutting edge of the teeth of the anterior region of the upper jaw) of the receiving space 111.

[0083] In one embodiment of the present disclosure, shell body 100 has a geometric structure configured to progressively change the position of a plurality of teeth from initial positions to desired correction positions. In particular, when a patient wears a shell orthodontic appliance, the shell body 100 not only accommodates the teeth, but also corrects the teeth. For example, the shell body 100 affects the gradual repositioning of the teeth to desired positions from their original positions while adjusting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal positions in the sagittal direction. The correction efficiency is not only improved at certain stages, but from the correction technology as a whole, the correction efficiency is also improved. In a special case of correction, for example, in the case of deep vertical overlap of the anterior teeth, a patient with a deep sagittal mandibular occlusal curve can use a shell orthodontic appliance to perform a maxillary-mandibular alignment correction, with the shell body 100 on the shell orthodontic appliance helping to push down the anterior teeth. or pull up the posterior teeth to complete the alignment of the sagittal occlusal curve, to achieve the effect of synchronous correction. In some other embodiments, the shell body 100 performs only the function of housing the teeth and not correcting the teeth. This position allows to increase the comfort of the patient wearing the apparatus, and has a corrective effect, only correcting the position of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the required occlusal positions in the sagittal direction, does not correct the remaining teeth. Thus, the correction in every possible way is aimed at a specific goal. In addition, the discomfort caused by the conchoidal body 100 during tooth correction is reduced.

[0084] In one embodiment of the present disclosure, the shell body 100, the receiving space 111, the first reinforcement 112, and/or the second reinforcement 113 are integrally formed. More specifically, in one embodiment of the present disclosure, the shell body 100, the receiving space 111, and the first reinforcing element 112 are integrally formed. The shell body 100, the receptacle 111, and the first reinforcement 112 may be a structure that is thermoformed in one piece and then cut as specifically needed for correction, or may be a 3D printed structure. In the integrally formed method, the manufacturing steps are simple, the product is comfortable to wear by the patient, and the close connection of the shell body 100, the receiving space 111, and the first reinforcement 112 results in a high wearing safety. There will be no case where the loose connection of the conchoidal body 100, the receiving space 111 and the first reinforcing element 112 will cause the patient to swallow by mistake, resulting in unnecessary harm. In another embodiment, the shell body 100, the receiving space 111, and the first reinforcement 112 are separately formed structures. The shell body 100, the receiving space 111, and the first reinforcing element 112 may be connected by bonding, magnetic attraction, and pressing. Separately formed structure is convenient for installation. The shell body 100, the receiving space 111, and the first reinforcing member 112 suitable for the patient's tooth cavity and having various corrective effects can be selected to be installed according to the specific conditions of the patient's tooth cavity, so that the patient is treated according to individualization. In other embodiments, the shell body 100 and/or the receptacle 111 and/or the first reinforcement 112 and/or the second reinforcement 113 are connected in a manner similar to the method of integrally forming or separately forming the shell body 100, the receptacle 111 and the first reinforcing element 112, as described above, although this is not further illustrated by an example.

[0085] In one embodiment of the present disclosure, an orthodontic system is provided. The orthodontic system comprises a plurality of conch-shaped orthodontic appliances. Wherein, at least one of the plurality of shell-shaped orthodontic appliances is a shell-shaped orthodontic appliance according to any of the embodiments disclosed above. A plurality of shell-shaped orthodontic appliances have a geometric shape that is configured to gradually change the position of the teeth from the initial positions to the desired positions. More specifically, an orthodontic system can only serve to correct one jaw. For example, this is only a correction of the upper jaw. During correction, a plurality of shell-shaped orthodontic appliances are configured to gradually change the position of the teeth from the initial positions to the desired positions. For example, if a plurality of shell-shaped orthodontic appliances are placed on the teeth of the upper jaw, the sagittal corrector 110 is configured to correct the positions of the teeth in the anterior region of the lower jaw relative to the upper jaw to the height of the desired occlusal positions in the sagittal direction. At the same time, the shell-shaped body 100 has a geometric shape, made with the possibility of gradually changing the position of the teeth from the initial positions to the required positions. Thus, for the patient's teeth, the correction of the teeth is performed simultaneously with the correction of the ratio of the maxillary-mandibular position. That is, orthopedic and orthodontic treatment is performed simultaneously, which is more effective and more comfortable for the patient wearing the apparatus.

[0086] In one embodiment of the present disclosure, a number of different pluralities of shell-shaped orthodontic appliances are configured to gradually change the position of the teeth from the initial positions to the desired correction positions. In this document, home positions are relative positions in the digital model obtained from the patient during treatment. The required correction positions are the positions of the final result of the correction obtained by the orthodontist or medical designer in accordance with the request of the patient and the condition of the patient's oral cavity. Due to individual differences, oral conditions vary from patient to patient. The teeth must be gradually moved from their original position to their desired position, during which a number of different sets of shell orthodontic appliances must be worn to correct the teeth.

[0087] In one embodiment of the present disclosure, an orthodontic system is further provided. The orthodontic system comprises a plurality of sets of orthodontic appliances, which include at least one set of orthodontic appliances described below. A plurality of sets of orthodontic appliances have a geometric shape that is configured to gradually change the position of the teeth to the desired positions from the initial positions. Next, the set of orthodontic appliances according to this embodiment will be specifically described below.

[0088] In one embodiment of the present disclosure, a set of orthodontic appliances is further provided, wherein the set of orthodontic appliances comprises a maxillary orthodontic appliance and a mandibular orthodontic appliance. Here, the maxillary orthodontic appliance is a maxillary orthodontic appliance according to any of the above embodiments, and the mandibular orthodontic appliance is a shell-shaped mandibular orthodontic appliance worn in accordance with the maxillary orthodontic appliance. When wearing a shell-shaped maxillary orthodontic appliance, the shell body 100 accommodates the upper teeth and the sagittal corrector 110 corrects the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal positions in the sagittal direction. At the same time, a shell-shaped orthodontic appliance, worn on the lower teeth, accommodates the lower teeth. The shell-shaped mandibular orthodontic appliance may be only a shell-shaped orthodontic appliance accommodating the lower teeth, or a geometric structure capable of gradually changing the position of the lower teeth from the initial positions to the desired correction positions. When synchronously correcting the maxilla and mandible in a patient with a deep to deep sagittal occlusal curve of the mandible, the anterior teeth can be pressed or the posterior teeth can be pulled upwards to align the sagittal occlusal curve. Thus, when performing the correction of the maxillary-mandibular alignment relationship, the upper and lower teeth are corrected, and the orthopedic and orthodontic treatment is performed simultaneously.

[0089] In one embodiment of the present disclosure, a variety of different sets of shell-shaped orthodontic appliances are configured to gradually change the position of the teeth from the initial positions to the desired correction positions. Here, the initial positions are the relative positions in the digital model obtained from the patient during the treatment. The required correction positions are the positions of the final result of the correction obtained by the orthodontist or medical designer in accordance with the request of the patient and the condition of the patient's oral cavity. Due to individual differences, oral conditions vary from patient to patient. The teeth need to be gradually moved from the initial position to the desired position, during which a number of different sets of shell orthodontic appliances must be worn to correct the teeth.

[0090] When wearing a shell-shaped orthodontic appliance, a set of orthodontic appliances, an orthodontic system, or a correction system, the relative position of the patient's upper and lower jaw can be corrected from the initial state shown in FIG. 14 to the desired correction positions shown in FIG. 15.

[0091] In one embodiment of the present disclosure, a method is provided for making a shell-shaped orthodontic appliance as described above. The manufacturing method is based on the above-described design method for manufacturing an engineered shell-shaped orthodontic appliance. The manufacturing method includes a thermoforming manufacturing method and then cutting or a 3D direct printing manufacturing method.

[0092] In one of the embodiments of the present disclosure, the production module in the manufacturing method may be an installation of layer-by-layer printing technology. To manufacture an orthodontic appliance using a layered printing technology installation, it is necessary to directly print an orthodontic appliance based on a finite element digital model of an orthodontic appliance obtained as required by 3D printing technology. 3D printing technology can be stereolithography (SLA) or digital light processing (DLP).

[0093] In one embodiment of the present disclosure, the production module of the manufacturing method may further be a 3D printing device, a laminating device, a cutting device, a polishing device, or a cleaning and disinfection device. The steps of the manufacturing method are as follows. First, 3D printing technology is used to directly print a finite element digital model of a digital model of teeth as needed. Then lamination is performed on the printed 3D model of the teeth. Finally, operations such as cutting, polishing, cleaning and disinfecting the laminated orthodontic appliance are performed to obtain a finished orthodontic appliance.

[0094] Although the above description shows certain embodiments of the present disclosure, those skilled in the art will appreciate that they are merely examples. The scope of legal protection of this disclosure is determined by the formula. These embodiments may be modified or supplemented by those skilled in the art without departing from the spirit and spirit of this disclosure, and such modifications and additions fall within the protection scope of this disclosure.

Claims (29)

1. A shell-shaped orthodontic apparatus for correcting the positions of teeth in the anterior region of the lower jaw in the sagittal direction, containing a shell-shaped body provided with a cavity, made to accommodate the teeth of the upper jaw, while the sagittal corrective element is on the lingual side in the anterior region of the shell-shaped body, sagittal corrective the element is configured to correct the positional relationship of the upper and lower jaw, while at least partially compensate for the deformation of the conchoidal body caused by occlusion; the sagittal correction element is at least partially connected to the lingual side in the anterior region of the conchoidal body; and the sagittal corrector has a geometric structure configured to stabilize the maxillary-mandibular occlusal relationship and reduce shell body deformation caused by occlusion, while correcting the positions of the teeth in the anterior region of the mandible relative to the maxilla to the height of the desired occlusal positions in the sagittal direction; the sagittal corrective element contains the side wall of the receiving space and the first reinforcing element; wherein the receiving space is formed by extending and bending the lingual side in the anterior region of the conchoidal body, and the first reinforcing element is configured to at least partially compensate for the deformation of the conchoidal body caused by occlusion; the receiving space accommodates at least the cutting edge of the teeth in the anterior region of the lower jaw or a part adjacent to the cutting edge, and the end of the first reinforcing element is connected to the end of the side wall, remote from the conchoidal body, and the direction of the longitudinal axis of the teeth in the sagittal section, the area of the first reinforcing element that comes into contact with the lower jaw, to a greater extent adjacent to the cutting edge of the anterior region of the upper jaw, compared with the area of the receiving space that comes into contact with the lower jaw. 2. Shell-shaped orthodontic appliance according to claim 1, in which in the sagittal section the first angle α is formed at the connection between the first reinforcing element and the side wall of the receiving space, and 90°≤α≤160°. 3. A shell-shaped orthodontic appliance according to claim 1, in which the connection between the first reinforcing element and the shell-shaped body is a smooth transitional curved surface. 4. The shell-shaped orthodontic appliance according to claim 3, in which the first reinforcing element is connected to the medial end surface of the cavity containing the first premolar tooth, both on the left and on the right side of the shell body with a smooth transition. 5. A shell-shaped orthodontic appliance according to claim 4, wherein the side of the first reinforcing element remote from the teeth in the anterior region of the maxilla generally anastomoses the radians of the arch of the teeth in the anterior region. 6. A shell-shaped orthodontic appliance according to claim 1, in which, in sagittal section, the first reinforcing element has a width of 2 to 5 mm in the medial-distal direction. 7. The shell-shaped orthodontic appliance according to claim 1, in which the receiving space is a groove continuously distributed or partially continuously distributed on the lingual side of the teeth in the anterior region of the upper jaw and concave towards the palate, and the groove is configured to reduce the deformation of the shell-like body formed in the direction of the buccal-lingual side or in the sagittal direction. 8. A shell-shaped orthodontic appliance according to claim 1, in which the receiving space has a height difference in the direction of the longitudinal axis of the teeth in the sagittal section, and the height difference is from 1/4 to 1/2 of the length of the dental crown of the teeth in the anterior region of the lower jaw along the direction longitudinal axis. 9. A shell-shaped orthodontic appliance according to claim 1, wherein the receiving space has a width of 1.5 to 4.0 mm in the medial-distal direction in a sagittal section. 10. A shell orthodontic appliance according to claim 1, wherein the first reinforcing element has an elastic modulus greater than that of the shell body. 11. A shell orthodontic appliance according to claim 1, wherein the first reinforcing element has a hardness greater than that of the shell body. 12. A shell-shaped orthodontic appliance according to claim 11, wherein the first reinforcement has a Shore hardness of 65D to 80D and the shell body has a Shore hardness of 50D to 75D. 13. A shell-shaped orthodontic appliance according to claim 1, wherein the first reinforcing element is a multilayer structure containing a base layer and at least one reinforcing layer, and at least one reinforcing layer at least partially covering the base layer. 14. A shell orthodontic appliance according to claim 13, wherein the first reinforcing element formed by the sandwich structure has an overall thickness greater than that of the shell body. 15. A shell-shaped orthodontic appliance according to claim 13, in which the reinforcing layer has an elastic modulus greater than the elastic modulus of the base layer. 16. A shell-shaped orthodontic appliance according to claim 1, wherein the first reinforcing element has a thickness of 0.7 to 2.0 mm and the shell body has a thickness of 0.5 to 1.0 mm. 17. A shell-shaped orthodontic appliance according to claim 1, in which the first reinforcing element, the receiving space and the shell-shaped body are formed as a whole. 18. The shell-shaped orthodontic appliance according to claim 1, wherein the second reinforcement is provided at a distally extending end of the first reinforcement, the first reinforcement and the second reinforcement are closed to form a receiving space, the first reinforcement and the second reinforcement are provided with a second angle β intersection, with 90°≤β<180°. 19. The shell orthodontic appliance of claim 18, wherein the accommodation space accommodates a reinforcing block. 20. A shell-shaped orthodontic appliance according to claim 19, wherein the second reinforcing element is provided with a protrusion-trough structure corresponding to the reinforcing block. 21. The shell orthodontic appliance of claim 20, wherein the second reinforcing element is provided with a convex protrusion protruding distally, and the convex element corresponding to the convex protrusion is provided on the convex protrusion corresponding to the area of the reinforcing block coming into contact with the second reinforcing element. 22. The shell-shaped orthodontic appliance according to claim 1, in which the side wall of the receiving space includes a medial side wall for placement and a distal side wall for placement, a part of the medial side wall for placement adjacent to the cutting edge of the upper jaw, at least partially connected to the lingual side in the anterior region of the conchoidal body, the part of the medial side wall for placement, remote from the incisal edge of the upper jaw, is at least partially connected to the end of the distal side wall for placement, and the other end of the distal side wall for placement is at least partially connected to the first reinforcing element. 23. The shell orthodontic appliance of claim 22, wherein the distal placement sidewall is a guiding surface configured to guide the mandible to smoothly transition into the receiving space. 24. The shell orthodontic appliance of claim 23, wherein the guiding surface is a guiding plane, a curved guiding surface, or a combination of a guiding plane and a curved guiding surface. 25. The shell orthodontic appliance of claim 24, wherein when the distal placement sidewall is or partially a guide plane, the third intersection angle γ is formed by the distal placement sidewall and the jaw plane in sagittal section, wherein 30°≤γ ≤80°. 26. The shell-shaped orthodontic appliance of claim 22, wherein the medial side wall for placement is provided with a stabilizing surface with an angle of inclination configured to provide the mandible with stable occlusion in the receiving space. 27. Shell-shaped orthodontic apparatus according to. 26, wherein the stabilizing surface is a stabilizing plane, a curved stabilizing surface, or a combination of a stabilizing plane and a curved stabilizing surface. 28. The shell orthodontic appliance of claim 27, wherein when the distal placement sidewall is or partially a guide plane, the angle of inclination is the fourth intersection angle δ formed by the medial placement sidewall and the jaw plane in sagittal section, wherein 30°≤δ≤80°. 29. The shell-shaped orthodontic appliance of claim 1, wherein the shell-shaped body has a geometric structure capable of gradually changing the position of the upper teeth from initial positions to desired correction positions.

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