CN116585058A

CN116585058A - Impression tray for orthodontics

Info

Publication number: CN116585058A
Application number: CN202310426482.6A
Authority: CN
Inventors: 李月明; 刘振华; 陈永刚
Original assignee: Beijing Zhongguancun Hospital
Current assignee: Beijing Zhongguancun Hospital
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-08-15

Abstract

An impression tray for orthodontics consists of an arc-shaped sheet body capable of being in clearance fit with a dental arch of a vestibule area on the labial side and a handle for supporting the arc-shaped sheet body, wherein the cross section of the arc-shaped sheet body is C-shaped, and a plurality of holes for temporarily holding impression materials are formed in the arc-shaped sheet body. The arc-shaped sheet body is provided with a C-shaped center side surface which is suitable for covering the mandibular teeth and the maxillary teeth at the same time, and the top wall and the bottom wall of the arc-shaped sheet body are formed in a wave-shaped curved surface mode which is suitable for the lacing parts of lips and cheeks. The impression tray can avoid excessive stimulation to patients, and is easy to demold and convenient to clean and disinfect.

Description

Impression tray for orthodontics

Technical Field

The application relates to the technical field of medical treatment, in particular to an impression tray for manufacturing a vestibular shield for orthodontics.

Background

In orthodontic impression techniques, trays are an important factor in the quality of impressions. Conventionally, when a vestibular shield for orthodontics is used for taking a die, a lower tray and an upper tray need to be taken as two impression trays, and the two impression trays are performed in two steps. Moreover, the disease is caused by the bad fit of teenagers and children, and even by the unexpected condition that the tray stimulates the tongue and other parts to cause vomiting.

Disclosure of Invention

In order to solve the problems, the application aims to provide an impression tray with a simplified structure, so that the die taking efficiency can be effectively improved, and the matching will of a patient can be enhanced.

According to the present application, there is provided an impression tray for orthodontic treatment, comprising an arc-shaped sheet body capable of clearance-fitting with a vestibular arch in a labial cheek side and a shank for supporting the arc-shaped sheet body, wherein the arc-shaped sheet body has a C-shaped cross section, and an impression material holding portion for temporarily holding an impression material is provided in the inner side of the C-shape.

Preferably, the top and bottom walls of the arcuate sheet are configured in a contoured manner for the labial and buccal lacing portions; and/or the arcuate blade has a C-shaped inside surface adapted to cover both mandibular teeth and maxillary teeth.

Preferably, the arcuate blade is integrally formed with the handle; or the arc-shaped sheet body and the handle part are combined, the arc-shaped sheet body is provided with an embedding hole part, the handle part is provided with a rod part and a head part with a cross section size larger than that of the rod part, and the rod part can penetrate through the embedding hole part from the inner side of the C shape of the arc-shaped sheet body to enable the head part to be embedded in the embedding hole part.

Preferably, the head portion has a concave portion formed on a distal end surface thereof for temporarily holding the impression material and/or has a through hole formed therein extending from the distal end surface toward the stem portion; or the concave portion is formed as the through hole.

Preferably, the impression material holding part includes holes and/or concavities and convexities formed on the arc-shaped sheet body.

Preferably, the hole on the bottom side of the arcuate sheet is provided with a pin or a movable rivet capable of being alternately fitted therewith.

Preferably, the arcuate sheet has a main sheet and a secondary sheet provided with a plug pin which can be plugged into a hole in the main sheet at a corresponding location.

Preferably, the arcuate blade includes a connecting portion formed on the back side of the C-shape for connecting with the end of the shank.

Preferably, the arcuate blade and the handle are both made of sheet metal, with the two being secured via staking or with a reversible connection being made via a magnetic element.

Preferably, the arcuate sheet body is composed of a main body portion having a dovetail groove recessed upward on a bottom side thereof, and a slider slidably fitted in the dovetail groove.

According to the impression tray disclosed by the application, not only can excessive stimulation on a patient be avoided, but also the impression taking can be completed at one time, the demolding is easy, and the cleaning and the disinfection are convenient.

Drawings

Fig. 1 schematically shows a perspective structural view of a impression tray according to an embodiment of the present application.

Fig. 2 schematically illustrates a curved structure view of upper and lower edges of a impression tray according to an embodiment.

Fig. 3 (a) and (B) schematically show a combined structure of the impression tray according to a modification.

Fig. 4 (C) and (D) schematically show the telescopic structure of the impression tray according to a modification.

Fig. 5 schematically shows a combined attachment structure of the impression tray according to a modification.

Fig. 6 (E) and (F) show upper and lower mold taking structures of a conventional mold tray, respectively.

Detailed Description

Exemplary embodiments of the present application are described in detail below with reference to the attached drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present application to enable one skilled in the art to make and use the present application in a number of different environments and for a number of different applications. The scope of the application is therefore defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, as limiting the scope of the application. Moreover, for ease of description, the dimensions of the various features shown in the drawings are not necessarily drawn to actual scale, like elements being indicated by like or similar reference numerals, and there may be instances in which conventional structures or partial constructions are omitted for ease of viewing in some of the drawings. References to orientation descriptions such as upper, lower, back, inner, top, bottom, etc. may be based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the application and to simplify the description, and do not indicate or imply that the device or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Further, proximal and distal refer to a transverse direction corresponding to the cross-sectional direction of the patient's body and a longitudinal direction perpendicular to the sagittal or coronal plane of the transverse direction with respect to the positional relationship of the impression operator. The following description of the embodiments emphasizes the differences between the embodiments, and the same or similar features may be referred to each other, so that technical features in the different embodiments may be freely combined to form further embodiments according to design needs for brevity and not described in detail.

Fig. 6 shows a conventional impression tray 20 in which a ridge portion 21 and two tongue wings 22 are formed at the central portion of the bottom surface surrounded by the outer peripheral wall 24, respectively, and when taking a model by placing an impression material along a channel 23 formed along the inner side of the outer peripheral wall 24, the ridge portion 21 and the tongue wings 22 are structured to stimulate the tongue and palate raised portions in the oral cavity, causing discomfort to the patient and even vomiting or reduced intention of fit.

In contrast, according to the present application, as shown in each of the embodiments or modifications of fig. 1 to 5, a tray of a novel structure is provided.

The impression tray 1 shown in fig. 1 has a labial-buccal arc-shaped body 2 for being uniformly press-fitted with a dental arch of a patient in a state of sandwiching an impression material, and a handle 3 for holding and supporting the arc-shaped body 2, and a plurality of holes 4 for temporarily holding the impression material are formed through the arc-shaped body 2.

The arc-shaped sheet body 2 is a curved plate with a C-shaped cross section, and the transverse perimeter is suitable for at least covering a plurality of teeth of the vestibule region; the longitudinal section may be rectangular as shown in fig. 1, but not limited thereto, and may be a curved plate shape with a central side recessed proximally with respect to a peripheral side, and is suitable for covering both mandibular teeth and maxillary teeth.

As shown in the front expanded view of fig. 2, the top and bottom walls of the arcuate sheet 2 are configured in a contoured manner to accommodate the patient's labial and buccal lacing areas. That is, the upper edge (corresponding to the upper lip side) and the lower edge (corresponding to the lower lip side) of the arcuate sheet 2 may have a corresponding smoothly transition notch at a portion corresponding to the labial and buccal laces. The upper and lower sides of the arcuate sheet 2 are formed symmetrically, and in the concave structures along the outer surfaces of the upper and lower bottom edges, the distances between the respective peaks and valleys from the central portion (illustrated by hatched portions in the drawing for ease of understanding) may be set to, for example, h1=h7=16 mm, h2=h6=12 mm, h3=h5=15 mm, h4=10 mm, respectively. Therefore, the peripheral shape and size of the arcuate sheet 2 are not limited to the rectangular shape illustrated in fig. 1, and may be specifically set as needed.

In this way, when taking out the impression material such as alginate is applied to the distal side (also called the center side or the inner side of the C) of the arc-shaped sheet body 2, the holding force for the impression material is increased by the hole 4, the operator holds the handle 3 to send the arc-shaped sheet body 2 into the vestibule region of the oral cavity of the patient, presses the impression material to the mandibular teeth and the maxillary teeth and holds the proper material solidification time, then takes out the impression tray 1 from the oral cavity, and releases the solidified impression from the arc-shaped sheet body 2, thereby accurately acquiring the shape information of all or part of the dental arch in the vestibule region for the subsequent vestibule shield manufacturing. As an example, a perfusion model may be employed which has a tooth-arch-shaped groove portion, a cavity for placing a solidified stamp is formed on one side of the groove portion, and a cavity for perfusing and shaping a vestibular shield male mold is formed between a surface of the stamp placed in the cavity and the other opposite side of the groove portion. Alternatively, a 3D scanner may be used to scan to obtain a corresponding digital model, and the 3D print center may then make the vestibular shield.

As a modification, fig. 3 shows a combined structure in which the arc-shaped blade 2 and the handle 3 are separated, so that the individual difference of the patient can be adapted to reference the buccal cavity and the labial/buccal surface of the dental arch of the individual patient, so that the selected or replaced arc-shaped blade has a configuration consistent with the dental arch of the patient. As shown in fig. 3 (a), the arcuate sheet 2 has a fitting hole portion 7; as shown in fig. 3 (B), the shank 3 has a stem 34 and a head 31 having a larger cross-sectional dimension than the stem 34, and the stem 34 can be passed through the fitting hole 7 from the back side of the arcuate sheet 2 to reversibly fit the head 31 into the fitting hole 7, while the shank 3 can be gripped at the back side (i.e., the proximal side) facing away from the center side of the C-shape.

Thus, when the impression is to be taken, the appropriate arcuate blade 2 can be selected for the patient and assembled with the handle 3 for the impression operation described above. In demolding, the handle 3 is pushed from the back side to the back side, and demolding assistance is applied to the front end surface 35 of the head 31 toward the back side, so that the risk of breaking the stamp in demolding can be further suppressed.

Alternatively, the concave portion 32 for temporarily holding the impression material is formed on the tip end face 35, whereby the holding force for the impression material can be further increased.

Alternatively, the head portion 31 is formed with a through hole 33 extending from the tip end face 35 toward the stem portion 34 for temporarily holding the impression material. In this way, at the time of demolding, the push rod can pass through the through hole 33 from the rod portion 34 side, and further assist force can be applied to demolding. Of course, the opening of the through hole 33 on the distal end surface 35 may overlap (i.e., be identical to) the concave portion 32.

As another modification, fig. 4 (C) shows a part of a longitudinal section of the arcuate blade 2, and fig. 4 (D) shows a front view from the distal side, in which the arcuate blade 2 includes a main body portion having a dovetail groove 5 recessed upward on the bottom side and a slider 6 slidably fitted in the dovetail groove 5.

Thereby, the slider 6 can be slid out of the dovetail groove 5 to the distal portion, whereby the holding force for the impression material can be further increased with the protruding portion, facilitating further prevention of the removal of the impression material, thereby further reducing the demand for fluidity of the impression material. More specifically, when an impression material having a large fluidity is applied to an individual patient, a part of the slider 6 can be pushed out from the dovetail groove 5 from the proximal side to the distal side, and when the impression material is placed in the vestibule region, the protruding portion is pushed back to the proximal side by the resistance of the mandibular region, and discomfort to the patient due to the pressure of the protruding portion can be prevented, and the material holding force of the protruding portion is not required at this time either. Preferably, the length W1 of the above-mentioned protruding portion is equal to or greater than the length of the clearance portion on the near side of the dovetail groove 5, in other words, the length of the slider 6 in the slip direction is equal to or less than the dovetail groove 5, but is not limited thereto.

In addition or alternatively, in the case of a through hole in the bottom side of the arcuate sheet 2, the hole 4 may also have pins or rivets which can be engaged with them at intervals, the pins being able to extend in the hole 4 toward the inside of the C in the manner of the slider 6 described above and to retract in the opposite direction when it is subjected to resistance. In the case of rivets, a spacer may be provided on one end face side of the hole 4 in advance, and after the rivet is inserted, the spacer is removed to obtain a movable rivet, so that the movable rivet can be used for holding an impression material first and then can be forced to retract.

The connection between the arcuate piece and the shank is not limited to the above, and both may be integrally formed, or may be formed such that a connection portion for connecting with an end portion of the shank is formed on the back side of the arcuate piece, thereby forming an interlocking reversible connection. In addition, the two can be made of deformable materials such as thermoplastic materials or flexible resins, for example, common low-temperature thermoplastic materials can be used for personalized plastic deformation after softening, and the arc-shaped sheet body and the handle can be made of metal sheet bodies, and can be fixed through riveting or can form reversible (detachable) connection through a magnetic element.

The above-mentioned impression material holding portion is exemplified by the hole 4, the hole 4 is preferably a through hole but may be a blind hole, and the slider 6 also serves as an impression material holding portion, but not limited to this, and other means for increasing adhesion holding force to an impression material, such as a rough surface or a hook surface of a velcro, a rough frosted surface, knurling, a screen, and a so-called concave-convex portion may be provided on the inner side.

As a modification, fig. 5 shows a combined structure of a main blade (corresponding to the arc blade 2 of fig. 1) and a sub blade 10, the sub blade 10 serving as an extension of the main blade, and a mating portion 9 such as a step on the lateral end side provided with a plug pin 8 such as a taper shape, which can be plugged into a corresponding hole 4 on the main blade, so that the lateral span of the main blade can be appropriately extended to accommodate different patients. The corresponding holes 4 in this main plate actually serve two functions: the impression material remains active without extension and the extension engages the aperture.

Thus, according to the application, the C-shaped bent plate surface is different from the traditional tray in structure comprising not only the peripheral wall but also the U-shaped bottom surface and the channel on the U-shaped bottom surface, and the user experience can be remarkably improved without touching the lingual side during impression.

In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. While the application has been described with reference to various specific embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the application not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims.

Claims

1. An impression tray for orthodontics is characterized by comprising an arc-shaped sheet body capable of being in clearance fit with a dental arch of a vestibule area on the labial cheek side and a handle for supporting the arc-shaped sheet body, wherein the cross section of the arc-shaped sheet body is C-shaped, and an impression material holding part for temporarily holding an impression material is arranged on the inner side of the C-shaped.

2. The impression tray for orthodontic treatment according to claim 1, wherein the top wall and the bottom wall of the arc-shaped sheet body are formed in a wave-shaped curved surface manner adapted to the labial and buccal lacing portions; and/or the arcuate blade has a C-shaped inside surface adapted to cover both mandibular teeth and maxillary teeth.

3. The impression tray for orthodontic treatment according to claim 1, wherein the arc-shaped sheet body is integrally formed with the handle; or the arc-shaped sheet body and the handle part are combined, the arc-shaped sheet body is provided with an embedding hole part, the handle part is provided with a rod part and a head part with a cross section size larger than that of the rod part, and the rod part can penetrate through the embedding hole part from the inner side of the C shape of the arc-shaped sheet body to enable the head part to be embedded in the embedding hole part.

4. The impression tray for orthodontic treatment according to claim 3, wherein a concave portion for temporarily holding an impression material is formed on a tip end surface of the head portion and/or the head portion is formed with a through hole extending from the tip end surface toward the stem portion direction; or the concave portion is formed as the through hole.

5. The impression tray for orthodontic treatment according to claim 1, wherein the impression material holding part comprises holes and/or concavities and convexities formed on the arc-shaped sheet body.

6. The impression tray for orthodontic treatment according to claim 5, wherein the hole of the bottom side of the arc-shaped sheet body is provided with a pin or a movable rivet capable of being engaged with the hole at intervals.

7. The impression tray for orthodontic treatment according to claim 5, wherein the arc-shaped sheet body has a main sheet body and a sub-sheet body provided with a socket pin, which is inserted into a hole at a corresponding position on the main sheet body.

8. The impression tray for orthodontic treatment according to claim 1, wherein the arc-shaped sheet body includes a connection portion formed at a back side of the C-shape for connection with an end portion of the handle.

9. The impression tray for orthodontic treatment according to claim 1, wherein the arc-shaped sheet body and the handle are both made of metal sheet body, and the two are fastened by caulking or are reversibly connected by a magnetic member.

10. The impression tray for orthodontic treatment according to claim 1, wherein the arc-shaped sheet body is composed of a main body portion having a dovetail groove recessed upward at a bottom side and a slider capable of sliding in the dovetail groove.