JP-7855061-B2 - Computer implementation method for digitally designing the geometric shape of adjacent teeth

Inventors

• ハンセン，ジェームズ ディー．
• ラングール，ケイトリン エム．
• ディンゲルダイン，ジョーゼフ シー．
• ノリス，ジョン エー．

Assignees

• ソルベンタム インテレクチュアル プロパティズ カンパニー

Dates

Publication Date

20260507

Application Date

20220816

Priority Date

20210830

Claims (7)

1. A computer implementation method for digitally designing the geometric shape of adjacent teeth, The computing device generates a digital three-dimensional (3D) model of a patient's desired dental structure, wherein the desired dental structure represents the intended shape of at least one of the patient's teeth. The computing device selects one or more pairs of teeth in the 3D model, wherein the teeth in the pair are adjacent, and the selection is performed. The computing device determines the position and orientation of adjacent teeth within the interdental space in order to insert a digital 3D geometric shape having one or more initial parameters for each selected pair of teeth. The computing device inserts the digital 3D geometric shape into the determined position and orientation, Computer implementation methods, including those mentioned above.
2. The computer mounting method according to claim 1, wherein one or more initial parameters of the digital 3D geometric shape include at least one thickness greater than 100 microns and less than 500 microns.
3. Determining the position and orientation within the adjacent interdental space is, By offsetting the adjacent teeth and causing their respective geometric shapes to intersect, Identifying the overlapping portion of the geometric shapes of the intersecting adjacent teeth, The best-fitting plane is determined based on the identified overlapping portion , The computer implementation method according to claim 1, including the method described in claim 1.
4. Determining the position and orientation within the adjacent interdental space is, Determining the contact point between adjacent teeth, For each of the adjacent teeth, determine the landmark coordinate system, For each of the adjacent teeth, the mean of the landmark coordinate system is determined based on the determined landmark coordinate system , The orientation is determined based on the determined average of the landmark coordinate system, The position is determined based on the contact point between the adjacent teeth, The computer implementation method according to claim 1, including the method described in claim 1.
5. The computer implementation method according to claim 1, further comprising refining the digital 3D geometric shape.
6. The aforementioned refinement is, The 3D geometric shape is subdivided into one or more parts between the lingual end and the facial end of the 3D geometric shape, The process involves translating one or more parts of the 3D geometric shape relative to the digital 3D model to adjust the 3D geometric shape within the digital 3D model. The computer implementation method according to claim 5, including the method described in claim 5.
7. The aforementioned refinement is, The 3D geometric shape is subdivided perpendicularly into at least a first portion and a second portion, Adjusting one or more parameters of each of the aforementioned individual parts to adjust the 3D geometric shape within the digital 3D model, The computer implementation method according to claim 5, including the method described in claim 5.

Description

This disclosure relates to dental restorative devices for reshaping teeth. Dentists often utilize various dental appliances to reshape or restore a patient's dental structure. These appliances can be either stock designs tailored to individual patients, or custom devices built from a model of the patient's dental structure and extended to the desired structure. The model can be either physical or digital. Historically, it has proven difficult to construct a model that forms a dense, flossable contact area in a single step. Instead, dentists employ a time-consuming and potentially uncomfortable process of separating the formed contact area using blades, saws, and other tools. This disclosure relates to a technique for designing dental restoratives having improved and customized interproximal contacts to reduce or eliminate the need to separate interproximal contacts. In a first aspect, the first method includes generating a digital three-dimensional (3D) model of a patient's future desired dental structure, the future dental structure representing the intended shape of at least one of the patient's teeth; selecting one or more pairs of adjacent teeth in the 3D model; determining the position and orientation of the adjacent teeth in the interproximal space to insert a digital 3D geometric shape having one or more initial parameters for each selected pair of teeth; and inserting the digital 3D geometric shape at the determined position and orientation. One or more initial parameters of the digital 3D geometric shape may include at least one thickness greater than 100 microns and less than 500 microns. Furthermore, determining the position and orientation in the interproximal space may include offsetting adjacent teeth to intersect the respective geometric shapes of adjacent teeth; determining the Boolean intersection result of the adjacent teeth; and determining the best-fitting plane based on the Boolean intersection result. In addition, determining the position and orientation within the interdental space between adjacent teeth may include determining the contact points between adjacent teeth, determining a landmark coordinate system for each adjacent tooth, determining the mean of the landmark coordinate system for each adjacent tooth, determining the orientation based on the determined mean of the landmark coordinate system, and determining the position based on the contact points between adjacent teeth. The method may further include refining the digital 3D geometric shape. Refining the digital 3D geometric shape may include subdividing the 3D geometric shape into one or more parts between the lingual and facial ends of the 3D geometric shape, and translating one or more parts of the 3D geometric shape relative to a digital 3D model to adjust the resulting 3D geometric shape within the digital 3D model. Refining the 3D digital geometric shape may also include positioning the 3D geometric shape in terms of position and orientation relative to a 3D model, and scaling the predefined 3D geometric shape based on one or more parameters of the 3D model. Refining a digital 3D geometric shape may also include aligning the 3D geometric shape perpendicular to at least a first and a second part, and adjusting one or more parameters of each individual part to adjust the resulting 3D geometric shape in the digital 3D model. The parameters may include at least one of a first thickness along the mesial-distal axis, a distance along the gingival-occlusal axis, and an offset of each individual part. The parameters of each individual part may differ for each part. The method may further include generating a file representing a 3D physical matrix containing the 3D model and the refined 3D geometric shape, and generating a physical matrix from that representation. Generating a physical matrix from that representation may include constructing the physical matrix from that representation using a 3D printer. Furthermore, the refinement of the 3D geometric shape may include adding an oval cylinder to each instance of the digital 3D geometric shape, such that the oval cylinder is divided by an individual digital 3D geometric shape; aligning the central plane of the individual oval cylinder with the individual digital 3D geometric shape for each added oval; determining the angle between the individual dividing plane and the individual 3D digital geometric shape for each digital 3D geometric shape; and rotating the individual digital 3D geometric shape based on the individually determined angle for each digital 3D geometric shape to match the tooth inclination of each tooth. In a second embodiment, the second method may include generating a digital three-dimensional (3D) model of a patient's desired future dental structure, wherein the future dental structure represents the intended shape of at least one of the patient's teeth; selecting one or more pairs of teeth in the 3D model, where the teeth in the pair are adjacent; determinin