KR102347493B1 - Method for tooth arrangement design and apparatus thereof - Google Patents

Abstract

Disclosed are a method for designing a tooth arrangement and an apparatus therefor. A tooth arrangement design method and device according to an embodiment determine an anterior position for treatment, automatically generate an arch line for treatment based on the determined anterior position, and then arrange the teeth along the created arch line.

Description

Method for tooth arrangement design and apparatus thereof

The present invention relates to image analysis and processing technology, and more particularly, to digital dental diagnosis and treatment plan establishment technology through image analysis.

When establishing a dental treatment plan using digital dental treatment, it is possible to establish a more stable treatment plan by predicting and configuring the improved tooth arrangement from the current tooth condition. Since the dental model in the digital environment can move freely in the three-dimensional direction, it is possible to establish various treatment plans. At this time, better results can be obtained if a virtual arch line is set as a standard to align teeth more evenly and regularly, away from free movement of the tooth model, and if the tooth model is arranged according to the standard.

In general, the virtual archline provides and uses commercial wires for treatment so that they can be applied according to the operator's situational judgment. The surgeon selects an arch line that is appropriate in size or shape for the patient's oral structure from among various commercially available arch lines and proceeds with treatment. Alternatively, the operator manually creates an arch line according to the patient's individual condition and proceeds with treatment.

In order to determine an appropriate treatment method, a setup operation is required to create a virtual setup data so that the teeth are arranged in an ideal shape by establishing a diagnosis and treatment plan from clinical data in software prior to dental treatment. It is generally based on the operator's experience and knowledge to create an arch line that is used as a reference when creating setup data. Teeth arranged based on the arch line created based on the surgeon's experience and knowledge are not suitable for accurately solving various patient's problems.

Korean Patent Registration 10-1748134 (Registered on June 12, 2017)

We propose a tooth arrangement design method and device that can improve quality through aesthetic and functional improvement and shorten the time for accurate and accurate dental treatment planning by automatically suggesting an arch line, which is the standard for planned tooth arrangement, customized to the patient. .

A tooth arrangement design method according to an embodiment comprises the steps of: analyzing the measurement information of the patient's clinical data to determine the current state of the patient; It includes the steps of generating an arch line based on the determined anterior position, and arranging the teeth by moving other individual teeth along the created arch line and displaying the arranged teeth on an output unit.

In the step of determining the patient's current status, the patient's current status is determined using measurement information including at least one of the patient's facial information, skeletal information, and oral information, and the facial information includes upper and lower lip protrusion information. and, the skeletal information includes at least one of maxillary and mandibular state, maxillary anterior position, maxillary anterior inclination, mandibular incisor position, mandibular anterior inclination, and maxillary and mandibular anterior angle information, and oral information includes midline, vertical overlay, horizontal overlay, It may include at least one of upper and lower incisor angle, canine relationship, and molar relationship information.

The step of determining the anterior position includes determining whether a facial change is necessary by predicting facial changes according to the anterior position change of the maxilla and mandible, and if a facial change is necessary, reflecting the facial change to reflect the facial change and the range of the anterior position of the maxilla and the mandible and determining the anterior position of the maxilla and mandible by reflecting the skeletal structure of the maxilla and mandible, respectively, after the range of the anterior position of the maxilla and the mandible reflecting the facial change is determined or when facial change is unnecessary. have.

In the step of determining whether a facial change is necessary, a facial change is provided according to the movement amount of the central incisor of the patient. By measuring at least one of the distance where the lower labia enters when entering and the nasal angle that increases when the central incisor of the maxilla enters a predetermined distance, it is possible to determine whether facial changes are necessary as the facial changes are provided.

The step of determining the anterior position includes the steps of prioritizing the anterior position range of the maxilla reflecting the skeletal structure of the maxilla. Determining the range of the anterior position of the maxilla reflecting the

The step of determining the anterior position is a step of prioritizing the anterior position range of the mandible reflecting the skeletal structure of the mandible. Determining the range of the anterior position of the mandible reflecting

The step of generating the arch line includes determining the arch line range by reflecting at least one of skeletal information and oral information, and determining the occlusal conditions including the relationship between adjacent teeth and occlusal teeth based on the anterior position within the determined arch line range. It may include a step of generating an arch line by reflecting it.

In the step of creating the arch line, the maxillary arch line may be larger than the mandible arch line and face the soft tissue, and the mandibular arch line may be disposed at a position facing the lingual side compared to the maxillary arch line.

The tooth arrangement design method may further include determining the occlusal relationship when the upper and lower teeth are arranged, correcting the arch line if necessary, changing the tooth arrangement, and displaying the changed tooth arrangement on an output unit.

The patient's clinical data may include at least one of CT data, oral data, and facial data, or data obtained by matching two or more.

A tooth arrangement design apparatus according to another embodiment includes a data acquisition unit for acquiring clinical data of a patient, and analysis of measurement information of the patient's clinical data to determine the patient's current status and perform treatment according to the determined patient's current status It includes a control unit that determines an anterior position for the purpose of arranging teeth by generating an arch line based on the determined anterior position and then moves other individual teeth along the created arch line to arrange the teeth, and an output unit that displays a screen according to the operation of the control unit do.

The control unit prioritizes the anterior position range of the maxilla reflecting the skeletal structure of the maxilla, and when facial changes are necessary, selects the anterior position range of the maxilla reflecting the facial changes within the anterior position range of the maxilla that reflects the skeletal structure of the maxilla determined first Finally, the anterior position of the maxilla can be determined by reflecting the relationship with the occlusal plane.

The control unit prioritizes the anterior position range of the mandible reflecting the skeletal structure of the mandible, and when facial changes are necessary, selects the anterior position range of the mandible reflecting the facial change within the anterior position range of the mandible that reflects the skeletal structure of the mandible determined first. Finally, the position of the mandibular incisors can be determined by reflecting the relationship with the maxillary incisors and the occlusal plane.

The control unit determines the arch line range by reflecting at least one of the skeletal information and the oral information, and generates an arch line by reflecting the occlusal conditions including the relationship of adjacent teeth and occlusal teeth based on the anterior position within the determined arch line range. have.

According to a tooth arrangement design method and an apparatus according to an embodiment, it is possible to establish a patient-specific dental treatment plan that can be expected to have both functional improvement and aesthetic improvement by reflecting changes in the skeletal structure and facial features of the patient.

In particular, when the mouth is opened for an aesthetic improvement effect, aesthetic improvement can be expected by arranging other teeth based on the maxillary anterior position with the highest external exposure. and can establish a dental treatment plan that is highly effective.

1 is a view showing the configuration of a tooth arrangement design device according to an embodiment of the present invention.
2 is a view showing the flow of a tooth arrangement design method according to an embodiment of the present invention;
3 is a view showing a working example for each step of the tooth arrangement design method according to an embodiment of the present invention;
4 is a view showing measurement information of clinical data according to an embodiment of the present invention;
5 is a diagram illustrating an example of determining an anterior position of clinical data according to an embodiment of the present invention;
6 is a view showing an example of automatic creation of an arch line of the maxilla according to an embodiment of the present invention;
7 is a diagram illustrating an example of automatically generating an arch line of the mandible according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted, and the terms to be described later are used in the embodiment of the present invention. These are terms that are defined reflecting the function of the user, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the content throughout this specification.

Each block in the accompanying block diagram and combinations of steps in the flowchart may be executed by computer program instructions (execution engine), which computer program instructions are executed by the processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. It may be mounted so that its instructions, which are executed by the processor of a computer or other programmable data processing device, create means for performing the functions described in each block of the block diagram or in each step of the flowchart.

These computer program instructions may also be stored in a computer usable or computer readable memory that may direct a computer or other programmable data processing device to implement a function in a particular manner, and thus the computer usable or computer readable memory. It is also possible to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flowchart, the instructions stored in the block diagram.

And since the computer program instructions may be mounted on a computer or other programmable data processing device, a series of operational steps is performed on the computer or other programmable data processing device to create a computer-executable process to create a computer or other programmable data processing device. It is also possible that instructions for performing the data processing apparatus provide steps for executing functions described in each block in the block diagram and in each step in the flowchart.

In addition, each block or step may represent a module, segment, or portion of code comprising one or more executable instructions for executing specified logical functions, and in some alternative embodiments the blocks or steps referred to in some alternative embodiments. It should be noted that it is also possible for functions to occur out of sequence. For example, it is possible that two blocks or steps shown one after another may be performed substantially simultaneously, and also the blocks or steps may be performed in the reverse order of the corresponding functions, if necessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art to which the present invention pertains.

1 is a view showing the configuration of a tooth arrangement design device according to an embodiment of the present invention.

Referring to FIG. 1 , a tooth arrangement design device 1 performs a tooth arrangement design to help with orthodontics, prostheses, dentures, and the like in actual dentistry. The tooth arrangement design task is a virtual tooth in which the patient's clinical data is acquired, the treatment plan is established by performing a simulation through diagnosis and analysis using the clinical data through software control, and the teeth are rearranged according to the established treatment plan. It means a series of processes to create setup data. Tooth alignment can be applied to orthodontics, prosthetics, and dentures. The patient's clinical data may include at least one of CT data, oral data, and facial data, or data obtained by matching two or more.

The tooth alignment design apparatus 1 according to an embodiment may include an electronic device capable of executing a tooth alignment design program, and a server that communicates with the electronic device through a network. Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smart phones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like.

The tooth arrangement design device 1 according to an embodiment determines the anterior position of the maxilla with the highest degree of external exposure when the patient opens his/her mouth, and automatically creates an arch line based on the determined anterior position of the maxilla. By arranging other individual teeth on the arch line, aesthetic improvement can be expected, and by creating an arch line that considers the occlusal relationship as well as the tooth arrangement, a more accurate and convenient dental treatment plan can be established. Anterior teeth are three teeth on each side and a total of six teeth on the left and right based on the midline. Anterior teeth may in particular be central incisors.

Hereinafter, the configuration of the tooth arrangement design device 1 having the above-described characteristics will be described below with reference to FIG. 1 .

Referring to FIG. 1 , an apparatus 1 for designing a tooth arrangement according to an embodiment includes a data acquisition unit 10 , a storage unit 12 , a control unit 14 , an input unit 16 , and an output unit 18 . .

The data acquisition unit 10 acquires clinical data from a patient. The clinical data required for treatment may include data obtained by matching at least one of CT data, oral data, and facial data, or data obtained by matching two or more. Furthermore, the cephalo-lateral photograph, panoramic data, cephalometric X-ray data, frontal radiograph (PA X-ray) data, and the like may be further included.

The scan data is data having information on actual teeth including damaged teeth. The scan data may be dental model scan data obtained by scanning a plaster model created by imitating a patient's oral cavity with a 3D scanner. As another example, it may be oral scan data obtained by scanning the inside of the patient's mouth using a 3D intra-oral scanner. The acquired scan data may be stored in the storage unit 12 .

CT data may be obtained by generating tomographic images of the patient's head using computed tomography (CT), segmenting the tooth boundaries in each tomography image, and combining them into one. These scan data and CT data are images obtained by imaging the maxillary teeth under the maxillary teeth with the patient’s mouth open, images obtained by imaging the mandibular teeth above the mandibular teeth with the patient’s mouth open, and local area imaging with the mouth closed. images, oral radiographs, etc. The acquired CT data may be stored in the storage unit 12 . The CT data may be three-dimensional data. Through CT data, external information of the face, soft tissue, internal information, skeletal structure, and oral information can be obtained and used in dental treatment.

The controller 14 may prepare data prior to analyzing the patient's clinical data. Data preparation may include data matching, individual tooth separation, feature information extraction, and reference information extraction. Data matching refers to matching at least two data constituting clinical data. For example, in order to improve the accuracy of each information data, the 3D oral scan data and the 2D or 3D facial scan data may be matched to the CT data to add root information to the tooth information. Alternatively, the two-dimensional face scan data and the three-dimensional oral scan data may be matched. By reflecting detailed information of the face through CT data or matching data matched with CT data, predictable information when changing the arrangement of teeth in the oral cavity is extended to the skeleton and face, and more accurate and visual results can be confirmed when establishing a treatment plan. . In addition, examples of the registration data may be a head photo and CT data, a head radiograph data and CT data, and an oral scan data and CT data, respectively.

The control unit 14 according to an embodiment analyzes the measurement information of the clinical data acquired from the data acquisition unit 10 to determine the current state of the patient. Problems can be diagnosed when the current state is determined. The measurement information may include, for example, at least one of facial information, skeletal information, and oral information of the patient. Facial information includes upper and lower lip protrusion information. The upper labial protrusion information may include a non-labial angle. The skeletal information includes information on the condition of maxilla and mandible, maxillary anterior position, maxillary anterior inclination, mandibular incisor position, mandibular incisor inclination, and maxillary incisor angle information. Oral information includes median line, vertical overgear, horizontal overgear, maxillary and mandibular anterior angle, canine relationship, and molar relationship information.

The control unit 14 determines an anterior position to automatically generate an arch line for treatment, and may determine an anterior position in consideration of skeletal structure, facial changes, occlusal conditions, and the like. Determination of anterior position reflecting skeletal structure For example, since the ultimate location of teeth during tooth arrangement is the skeleton, the anterior position range is first determined by reflecting the skeletal structure, and the anterior teeth can be moved within the determined anterior position range. By reviewing and confirming movement, it prevents excessive tooth movement in advance and enables planned dental treatment.

Determination of anterior position reflecting facial changes For example, to solve aesthetic problems beyond functional problems through dental treatment It increases the number of patients and helps the medical staff establish an accurate plan. To this end, factors that can affect the appearance of teeth arrangement in the oral cavity are derived, and when establishing a treatment plan, the solution of the item is considered first, so that the satisfaction of patients and medical staff of the established treatment plan can be improved.

Determination of anterior position that satisfies occlusal conditions For example, skeletal structure and facial changes are prioritized, and oral dental occlusal conditions are applied together to enable aesthetic and functional treatment planning.

The control unit 14 according to an embodiment determines whether a facial change is necessary by predicting a facial change according to an anterior position change of the maxilla and the mandible to determine the anterior position. In this case, if a facial change is necessary, an anterior position range of the maxilla and the mandible may be determined by reflecting the facial change. After the range of the anterior position of the maxilla and the mandible is determined by reflecting the facial change, or when facial change is unnecessary, the anterior position of the maxilla and the mandible may be determined by reflecting the skeletal structure of the maxilla and the mandible, respectively.

When determining whether a facial change is necessary, the controller 14 may determine whether a facial change is necessary by the operator or the patient by providing the facial change according to the amount of movement of the central incisor of the patient. For example, in facial scan data obtained from a patient, the distance that the upper labia enters when the central central incisors of the maxilla enter a predetermined distance, the distance that the lower labia enters when the central incisors of the mandible enter a predetermined distance, and the non-labial angle that increases when the central incisors of the maxilla enter a predetermined distance. As the facial change is provided by measuring at least one of them, it may be determined whether a facial change is required.

When determining the anterior position of the maxilla, the control unit 14 may prioritize an anterior position range of the maxilla reflecting the skeletal structure of the maxilla. In addition, when a facial change is required, it is possible to determine an anterior position range of the maxilla reflecting the facial change within the anterior position range of the maxilla reflecting the determined skeletal structure of the maxilla first. Finally, the anterior position of the maxilla can be determined by reflecting the relationship with the occlusal plane.

When determining the anterior position of the mandible, the control unit 14 may prioritize an anterior position range of the mandible reflecting the skeletal structure of the mandible. In addition, when a facial change is required, the anterior position range of the mandible reflecting the facial change may be determined within the anterior position range of the mandible reflecting the determined skeletal structure of the mandible first. Finally, the position of the incisors of the mandible can be determined by reflecting the relationship with the maxillary incisors and the relationship with the occlusal plane.

When the anterior position is determined, the controller 14 automatically generates an arch line based on the determined anterior position. At this time, after determining the arch line range by reflecting the skeletal information (additional oral information can be reflected), the control unit 14 reflects the occlusal conditions including the relationship between adjacent teeth and occlusal teeth based on the anterior position within the determined arch line range. Archlines can be created. For automatic arch line creation, the patient's skeletal information can be used, skeletal information and oral information can be used together, or an arch line can be created using oral information. Furthermore, the arch line of the maxilla may be positioned to be larger than the arch line of the mandible and face soft tissue, and the arch line of the mandible may be positioned to face the lingual side compared to the arch line of the maxilla.

After generating the arch line, the controller 14 moves the individual teeth other than the anterior teeth along the created arch line to arrange the teeth. The controller 14 may determine the occlusal relationship when the teeth of the maxilla and the mandible are arranged after the arrangement of the teeth, and if necessary, correct the arch line and then change the arrangement of the teeth.

The storage unit 12 stores various data such as information necessary for performing an operation of the tooth arrangement design device 1 and information generated according to the operation. The storage unit 12 may provide data necessary for the data analysis of the control unit 14 to the control unit 14 .

The output unit 18 displays a screen according to the operation of the control unit. For example, an upper incisor position, a mandibular incisor position, an arch line, a tooth arrangement, etc. may be displayed in clinical data.

The input unit 16 receives a user manipulation signal. For example, an operation signal for user correction such as movement and rotation of the tooth arrangement data displayed on the screen is received through the output unit 18 . The input unit 16 may receive, from the user, setting values for facial information, skeletal information, oral information, etc. extracted from the patient's clinical data. For example, the position of the facial lips according to the position of the maxillary anterior teeth may be set at various ratios designated by the operator.

2 is a diagram illustrating a flow of a tooth arrangement design method according to an embodiment of the present invention.

1 and 2, the tooth arrangement design apparatus 1 analyzes the measurement information of the patient's clinical data to determine the patient's current state (S210). When judging the patient's current state, the patient's problem situation can be diagnosed. Measurement information required to determine the patient's current condition includes facial information, skeletal information, and oral information. Facial information is lip state information, and whether the upper and lower lip protrudes or not, and the nasal angle is measured. As for the skeletal information, information on the anterior and posterior positions of the maxilla and the mandible, the maxillary anterior position, the maxillary anterior inclination, the mandibular incisor position, the mandibular anterior inclination, and the maxillary incisor angle are measured. For oral information, midline, vertical overbite, horizontal overjet, upper and lower incisor angles, canine relationship, and molar relationship are measured.

Subsequently, the tooth arrangement design apparatus 1 may determine whether a facial change is necessary. It is possible to determine whether an eye change is necessary by judging the patient's current condition, and whether to change the face according to the patient's request. The anterior position of the maxilla and mandible is a factor that directly or indirectly affects facial changes, especially the position of the lips. Accordingly, the range of positions where the upper and lower incisors should be may be determined depending on whether the facial features change.

If it is determined that an facial change is necessary in the face change necessary determination stage, the following procedure is followed in detail. The lip part of the face is a structure in which soft tissues protrude or sink depending on the position of the anterior teeth in the oral cavity. Therefore, in order for the upper labia to move forward, the maxillary incisors must move forward, and in order for the upper labia to move backward, a tooth arrangement in which the maxillary incisors move backward is essential. The lower labia should also be accompanied by the position of the mandibular incisors according to the lower labial position in the same principle.

In order to understand the effect of intraoral movement of anterior teeth on the facial lips, it may be necessary to analyze various factors such as the thickness, structure, and position of the soft tissue of the patient's lips. is one of the important factors that must be checked. In this case, the position of the facial lips according to the position of the maxillary anterior teeth may be applied at a predetermined ratio or various ratios designated by the operator. No matter what ratio is applied, it is essential to change the position of the lips and the same position of the anterior teeth.

When a change in the lips is not required, the current position of the anterior teeth of the maxilla and the mandible must be fixed in order to arrange the teeth without facial changes. In addition, the angle between the nose and the upper labia, that is, the change in the nasal angle, among the location information of the upper labia, is an additional matter that is affected by the position of the maxillary anterior teeth differently from the change in the lower labia. In addition to the position of the maxillary incisors, the angle at which the maxillary incisors protrude or sink forward acts as a factor in determining the size of the labial angle. In this case, the ratio of the non-labial angle may be applied to a pre-applied numerical value or a ratio specified by the user through analysis. In order to reduce the nasolabial angle, it should have an anterior protruding angle along with the maxillary anterior position. In order to increase the nasal angle, it must have an angle that is indented posteriorly along with the position of the maxillary anterior teeth. Based on the above, when determining whether to change the facial expression, the range of the upper and lower teeth positions can be calculated.

Then, the tooth arrangement design apparatus 1 determines the anterior position of the maxilla and the mandible according to the determined current state of the patient ( S220 ). In the maxillary anterior position determination step (S220), the tooth arrangement design device 1 determines the maxillary anterior position range according to facial changes, and adds information that can further improve skeletal and oral problems to finally improve the maxillary anterior teeth. location can be determined. After the range of anterior position according to facial changes is determined or when facial changes are not required, the anterior position of the maxilla can be determined by applying the information of the patient's skeletal structure and oral conditions.

If facial changes are necessary, calculate the range of the anterior position of the maxilla according to facial changes and apply the following sequentially. Although the crown portion of the tooth protrudes to the outside of the gum, the root can perform the function of the tooth only when it is located in the skeletal region inside the gum surrounded by the gum. The movement range of the maxillary anterior teeth must be adjusted because tooth movement must be performed only within the range where the skeleton can stably position the tooth root. Therefore, the range of the anterior position of the maxilla reflecting the skeletal structure of the patient is adjusted. The anterior position range of the maxilla takes precedence over the limit range of the skeleton, and the position range according to facial changes should be applied so that it is included within the skeleton limit condition. After the anterior position range of the maxilla is determined, it may be necessary to reflect the angle information of the teeth. This allows the factor determining the angle of the occlusal plane and the crown or the maximum approximation that can be reflected within the angle or movement range that reflects the value diagnosed by the operator, so that the final anterior position of the maxilla can be determined.

In the anterior position determination step of the mandible (S220), the tooth arrangement design device 1 determines the range of the anterior position of the mandible according to the facial change when determining whether facial changes are necessary, and information that can further improve skeletal and oral problems The position of the mandibular incisors can be determined by adding occlusal relationship information in a state where the determined anterior position of the maxilla is fixed. After determining the anterior position of the maxilla, the position range of the mandibular incisors is determined by reflecting the anterior position range of the mandible according to facial changes and the incisor position range of the mandible that the mandible skeleton has, such as the incisors of the maxilla. After the position range of the mandibular incisors is confirmed, the position of the mandibular incisors is finally determined by applying the following conditions. For example, by combining three pieces of information, the angle information of the long axes of the maxillary incisors and the mandibular incisors, the horizontal overjet of the anterior/posterior position, and the vertical overbite of the upper/lower position, each item is The final anterior position of the mandible can be determined so that it can have a preset value or a value that reflects the value diagnosed by the operator or a maximum approximate value.

Then, the tooth arrangement design device 1 creates an arch line based on the determined anterior positions of the maxilla and the mandible (S230). At this time, the range of the available arch line is determined based on the skeletal information and the oral information, and the adjacent teeth are in close contact and the occlusal relationship is maintained based on the anterior positions of the maxilla and the mandible within the determined range of the arch line. Creates a flat archline. Calculating the range in which the root of the tooth can be located in the skeleton of the maxilla and mandible, considering the angle information of the crown of the tooth with the occlusal plane, and the tooth arrangement of the occlusal structure so that all the teeth of the maxilla can cover all the teeth of the mandible You can create an archline to make this possible. That is, the arch line of the maxilla should be larger than the arch line of the mandible and should be positioned toward the soft tissue, and the arch line of the mandible should be positioned toward the lingual side compared to the arch line of the maxilla.

Then, the tooth arrangement design device 1 moves other individual teeth along the created arch line to arrange the teeth and display them on the output unit 18 ( S240 ). Then, when the upper and lower teeth are arranged, the occlusal relationship is determined, and the arch line is corrected if necessary, and then displayed on the output unit 18 (S250). The occlusal conditions required for aligning the maxilla and mandible are as follows.

Adjacent teeth must be in close contact. The maxillary canine is located between the mandibular canine and the first premolar. The mesio lingual cusp of the maxillary first molar coincides with the central fossa of the mandibular first molar. All the buccal cusps of the maxillary teeth are located more buccal than all the buccal cusps of the mandibular teeth. All the buccal cusps of the mandible are located more lingual than all the buccal cusps of the maxillary teeth.

The created maxillary and mandibular arch lines can be modified to enable tooth arrangement that should include the above items, and the arch line for tooth arrangement that can reflect additional items according to the operator’s diagnosis result can be modified ( S250). The finally determined arch line can be applied during tooth alignment or for the purpose of confirming the result of tooth alignment.

Meanwhile, the tooth arrangement design apparatus 1 may further perform a function of establishing a treatment plan and performing treatment, providing a result according to treatment, and confirming a prognosis.

3 is a view showing an operation example for each step of the tooth arrangement design method according to an embodiment of the present invention.

1 and 3 , the tooth arrangement design apparatus 1 analyzes measurement information of the patient's clinical data to determine the patient's current state (a). Then, the position of the anterior teeth 300 for treatment is determined according to the determined current state of the patient (b). Then, an arch line 500 is generated based on the determined position of the anterior teeth 300 (c). Next, other individual teeth are moved along the generated arch line 500 to arrange the teeth and display them on the output unit (d). Reference numeral 700 denotes the patient's original teeth before orthodontic treatment, and reference numeral 710 denotes teeth arranged by moving the teeth.

Illustratively, the tooth arrangement design device 1 determines that the patient's current state should be within the range of 1.5 mm or less of the anterior teeth (a), and the anterior teeth enter 1.5 mm by the device 1 or the user's setting. It will be possible to determine the position of the anterior (300) in order to (b). Next, when an arch line 500 is generated based on the determined position of the anterior teeth 300 (c), and other individual teeth are arranged along the created arch line 500 and displayed on the output unit, the original tooth 700 and the newly arranged teeth 710 may be displayed with different transparency, or the original teeth 700 may be displayed with a solid line and the newly arranged teeth 710 with a dotted line, etc. (d).

4 is a diagram illustrating measurement information of clinical data according to an embodiment of the present invention.

1 and 4 , the tooth arrangement design apparatus 1 analyzes measurement information of the patient's clinical data to determine the patient's current state. The clinical data may be single data or matched data obtained by matching at least two pieces of data. For example, the clinical data includes CT data, data obtained by matching oral data and facial data to CT data, and data obtained by matching oral data and facial data to CT data. The measurement information may include at least one of facial information, skeletal information, and oral information of the patient. Measurement information, for example, in the registration data in which the facial data and CT data of FIG. 4 are matched, facial information such as protrusion of the upper and lower lip, Nasolabial Angle 310 of the upper lip, and maxillary incisors, for example For example, skeletal information such as the position of the central incisor 300, maxillary incisor tilt, mandibular incisor position, mandibular incisor tilt, upper and lower incisor angle, and midline, horizontal palate, vertical palate, maxillary and mandibular incisor angle, canine relationship, molar relationship, etc. You can check oral information.

5 is a diagram illustrating an example of determining the transposition of clinical data according to an embodiment of the present invention.

1 and 5, the tooth arrangement design device 1 analyzes the measurement information including at least one of the patient's facial information, skeletal information, and oral information to determine the patient's current state, Determine the anterior position for treatment according to the current condition. 5 shows the position of the central incisor 300 determined from the matching data of the side.

6 is a diagram illustrating an example of automatic creation of an arch line of the maxilla according to an embodiment of the present invention.

1 and 6, the tooth arrangement design device 1 automatically creates an arch line based on the determined anterior position. 6 illustrates an arch line 500 of the maxilla automatically generated based on the determined position of the anterior teeth 300 . In FIG. 6, 1.7 mm represents an anterior movement distance as an example. In order to generate the arch line 500 of the maxilla, the tooth arrangement design device 1 determines the arch line range by reflecting at least one of skeletal information and oral information, and then determines adjacent teeth and anterior teeth within the determined arch line range based on the anterior position. The arch line can be created by reflecting the occlusal conditions including the occlusal tooth relationship.

7 is a diagram illustrating an example of automatically generating an arch line of the mandible according to an embodiment of the present invention.

Referring to FIGS. 1 and 7 , the tooth arrangement design device 1 automatically creates the arch line 600 of the mandible after the creation of the arch line 500 of the upper jaw. At this time, the arch line 500 of the maxilla may be larger than the arch line 600 of the mandible and face the soft tissue, and the arch line 600 of the mandible may be disposed in a position facing the lingual side compared to the arch line of the maxilla. As shown in FIG. 7 , the arch line 600 of the mandible may be generated within a certain range.

So far, the present invention has been focused on the embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be reflected in an illustrative rather than a restrictive point of view. The scope of the present invention is indicated in the claims rather than the above description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (14)

determining the patient's current condition by analyzing the measurement information of the patient's clinical data;
Determining an anterior position for treatment by predicting facial changes according to changes in the anterior position of the maxilla and mandible according to the determined current state of the patient;
After determining an anterior position, generating an arch line of maxilla and mandible using skeletal information and oral information based on the determined anterior position;
A step of arranging the teeth by moving other individual teeth along the generated arch lines of the upper and lower jaws and displaying them on the output unit; and
Separating the original teeth and the newly arranged teeth before moving the teeth and displaying them on the output unit;
A tooth arrangement design method comprising a. The method of claim 1,
Facial information for predicting facial change includes upper and lower lip protrusion information,
The skeletal information includes at least one of maxillary and mandibular state, maxillary anterior position, maxillary anterior inclination, mandibular incisor position, mandibular incisor inclination, and maxillary incisor angle information,
Oral information is a method for designing a tooth arrangement, characterized in that it includes at least one of a midline, a vertical overgrowth, a horizontal overlying, an upper and lower incisor angle, a canine relationship, and a molar relationship information. The method of claim 1, wherein determining the transposition comprises:
Predicting facial changes according to changes in the anterior position of the maxilla and mandible to determine whether facial changes are necessary;
determining an anterior position range of the maxilla and the mandible by reflecting the facial change if a facial change is required; and
determining the anterior position of the maxilla and the mandible by reflecting the skeletal structures of the maxilla and the mandible, respectively, after the range of the anterior position of the maxilla and the mandible reflecting the facial change is determined or when the facial change is unnecessary;
A tooth arrangement design method comprising a. The method of claim 3, wherein the step of determining whether a facial change is necessary comprises:
Provide a change in facial expression according to the amount of movement of the central incisor of the patient, and in the facial scan data obtained from the patient, the distance that the upper labia enters when the central central incisors enter a predetermined distance, the distance that the lower labia enters when the central incisors enter a predetermined distance, and A method of designing a tooth arrangement, characterized in that it is determined whether a facial change is necessary by measuring at least one of the nasal angles that increase when entering a predetermined distance to provide a facial change. The method of claim 1, wherein determining the transposition comprises:
Determining the anterior position range of the maxilla as a priority reflecting the skeletal structure of the maxilla;
determining an anterior position range of the maxilla reflecting facial changes within a range of anterior position of the maxilla reflecting the determined skeletal structure of the maxilla first if facial changes are required; and
Finally, determining the anterior position of the maxilla by reflecting the relationship with the occlusal plane;
A tooth arrangement design method comprising a. The method of claim 1, wherein determining the transposition comprises:
Determining as a priority an anterior position range of the mandible reflecting the skeletal structure of the mandible;
determining an anterior position range of the mandible reflecting facial changes within an anterior position range of the mandible reflecting the determined skeletal structure of the mandible when facial changes are required; and
Finally, determining the position of the anterior teeth of the mandible by reflecting the relation with the maxillary incisors and the relation with the occlusal plane;
A tooth arrangement design method comprising a. The method of claim 1, wherein the step of creating an archline comprises:
determining an arch line range by reflecting at least one of skeletal information and oral information; and
generating an arch line by reflecting occlusal conditions including the relationship between adjacent teeth and occlusal teeth based on the anterior position within the determined arch line range;
A tooth arrangement design method comprising a. The method of claim 1, wherein the step of creating an archline comprises:
A tooth arrangement design method, characterized in that the arch line of the maxilla is larger than the arch line of the mandible and faces the soft tissue, and the arch line of the mandible is positioned toward the lingual side compared to the arch line of the maxilla. The method according to claim 1, wherein the tooth arrangement design method is
determining the occlusal relationship when the teeth of the maxilla and the mandible are arranged, correcting the arch line if necessary, changing the tooth arrangement, and displaying it on the output unit;
Tooth arrangement design method comprising further comprising, The method of claim 1, wherein the patient's clinical data is
A tooth arrangement design method comprising at least one data or data obtained by matching two or more of CT data, oral data, and facial data. a data acquisition unit for acquiring clinical data of a patient;
Determine the anterior position for treatment by analyzing the measurement information of the patient's clinical data to determine the patient's current condition a controller for arranging the teeth by generating arch lines of the maxilla and mandible by using the skeletal information and oral information based on the determined anterior position after determining , and then moving other individual teeth along the created arch lines; and
an output unit for displaying a screen according to the operation of the control unit; includes,
the control unit
A tooth arrangement design device, characterized in that before tooth movement, the original teeth and the newly arranged teeth are distinguished and displayed on the output unit. The method of claim 11, wherein the control unit
Prioritize the anterior position range of the maxilla reflecting the skeletal structure of the maxilla,
If facial changes are required, first determine the maxillary anterior position range reflecting facial changes within the maxillary anterior position range reflecting the determined skeletal structure of the maxilla.
Finally, the tooth arrangement design device, characterized in that by reflecting the relationship with the occlusal plane to determine the position of the anterior teeth of the maxilla. The method of claim 11, wherein the control unit
Prioritize the anterior position range of the mandible reflecting the skeletal structure of the mandible,
If facial changes are required, first determine the anterior position range of the mandible that reflects the facial changes within the range of the anterior position of the mandible that reflects the determined skeletal structure of the mandible.
Finally, the tooth arrangement design device, characterized in that by reflecting the relationship with the maxillary anterior teeth and the occlusal plane to determine the position of the anterior teeth of the mandible. The method of claim 11, wherein the control unit
The arch line range is determined by reflecting at least one of the skeletal information and the oral information, and the arch line is created by reflecting the occlusal conditions including the relationship between adjacent teeth and occlusal teeth based on the anterior position within the determined arch line range. tooth arrangement design device.

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