CN115607322A - Virtual occlusion detection and design method and system based on intraoral three-dimensional scanning - Google Patents
Virtual occlusion detection and design method and system based on intraoral three-dimensional scanning Download PDFInfo
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- CN115607322A CN115607322A CN202211315284.4A CN202211315284A CN115607322A CN 115607322 A CN115607322 A CN 115607322A CN 202211315284 A CN202211315284 A CN 202211315284A CN 115607322 A CN115607322 A CN 115607322A
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000033001 locomotion Effects 0.000 claims abstract description 61
- 210000004513 dentition Anatomy 0.000 claims abstract description 52
- 230000003068 static effect Effects 0.000 claims abstract description 52
- 230000036346 tooth eruption Effects 0.000 claims abstract description 52
- 230000010354 integration Effects 0.000 claims abstract description 12
- 210000004373 mandible Anatomy 0.000 claims abstract description 7
- 210000001847 jaw Anatomy 0.000 claims description 13
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- 210000004763 bicuspid Anatomy 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008439 repair process Effects 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 description 3
- 208000006440 Open Bite Diseases 0.000 description 2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
- A61C19/05—Measuring instruments specially adapted for dentistry for determining occlusion
- A61C19/052—Measuring instruments specially adapted for dentistry for determining occlusion with tracing appliances
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- A—HUMAN NECESSITIES
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Abstract
The invention discloses a virtual occlusion detection and design method based on intraoral three-dimensional scanning, and relates to the field of oral repair. The invention comprises the following steps: acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state; utilizing static occlusion data to correspond to the tooth position of the mandible during movement in real time to obtain a tooth dynamic movement track; combining complete upper and lower jaw dentition data in a static state and fusing a lower jaw movement track to complete movement track integration; drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth; taking the buccal side of the dental crown as a common area, registering the segmented single-tooth data to occlusion data one by one to obtain occlusion data after tooth-by-tooth registration; and designing the prosthesis based on the dentition data and the occlusion data after the tooth-by-tooth registration. The invention can obtain accurate static and dynamic occlusion data, and greatly improves the precision and efficiency of prosthesis design and manufacture through automatic virtual occlusion detection and virtual blending.
Description
Technical Field
The invention relates to the field of oral repair, in particular to a virtual occlusion detection and design method and system based on intraoral three-dimensional scanning.
Background
The morphological design of the occlusal surface of the prosthesis is an important content in the field of oral restoration, is not only related to the recovery of chewing function, but also influences the stability of the whole oromandibular system. The occlusal surface of the prosthesis is coordinated with the residual teeth in the mouth, occlusion interference is avoided, the functional cuspate shape is recovered, the chewing function is reconstructed, the occlusal wear surface adapts to the lower jaw movement, and the marginal ridge is coordinated with the adjacent teeth to avoid food impaction. With the development of oral materials and minimally invasive concepts, the required amount of abutment preparation is less and less, which puts higher requirements on the design of the prosthesis. Therefore, designing a prosthesis with good occlusion function, reducing clinical adjustment and grinding and reducing the failure rate of the prosthesis is a problem which needs to be solved by each stomatologist.
With the improvement of the precision and the scanning speed of the intraoral three-dimensional scanner, the intraoral three-dimensional scanner is more and more widely applied to prosthesis design, can obtain high-resolution three-dimensional data of teeth, and can be subsequently used for prosthesis design and manufacture. However, most of the scanning occlusion data of the conventional commercial intraoral scanner is static information, and the occlusion information in a motion state cannot be recorded. The 3Shape intraoral three-dimensional scanner can provide a dynamic occlusion function in 2017, does not need additional devices and software, can record intraoral local dynamic occlusion in the process of acquiring dentition three-dimensional data, and can be used for prosthesis design. However, the scanning head window of the intraoral three-dimensional scanner is small, a single window can only scan 1-2 teeth, and when the dynamic occlusion function is used, if the mandible movement track obtained by only depending on 1-2 teeth is obtained, the mandible movement track may be biased.
In addition, in the conventional intraoral three-dimensional scanning dynamic occlusion technology, upper and lower dentitions in a non-occlusion state need to be scanned first, then a patient is allowed to occlude, and buccal forms of the upper and lower dentitions under the action of an occlusion force are scanned and used for registration. However, when buccal scanning is performed, teeth are physiologically moved due to occlusion force, and dentition morphology is slightly changed, and the tooth arrangement morphology obtained by buccal scanning in an occlusion state is theoretically different from the morphology of the upper and lower jaw dentition data scanned separately in the past. Therefore, if the full dentition scan data in the non-occlusion state is registered, the upper and lower model data are penetrated.
Disclosure of Invention
Based on the problems, the invention provides a virtual occlusion detection and design method and system based on intraoral three-dimensional scanning, which integrates the motion trail of multiple tooth positions, divides the posterior tooth area into single teeth, and registers the single teeth to occlusion information, thereby reducing the interference of the physiological movement of teeth in an occlusion state on the manufacture of a prosthesis. In addition, the dynamic occlusion information based on intraoral three-dimensional scanning is used for virtual occlusion detection and automatic virtual blending, so that the grinding of the prosthesis in clinic is reduced, and the precision and the efficiency of prosthesis manufacturing are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a virtual occlusion detection and design method based on intraoral three-dimensional scanning comprises the following steps:
acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state;
utilizing static occlusion data to correspond to the tooth position of the mandible during movement in real time to obtain a tooth dynamic movement track;
combining complete upper and lower jaw dentition data in a static state and fusing a lower jaw movement track to complete movement track integration;
drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth;
taking the buccal side of the dental crown as a common area, registering the segmented single-tooth data to occlusion data one by one to obtain occlusion data after tooth-by-tooth registration;
and designing the prosthesis based on the static dentition data and the occlusion data after the tooth-by-tooth registration.
Optionally, the static bite data should include buccal occlusions of left and right anterior molars to molars.
Optionally, the segmented single-tooth data is registered to the occlusion data one by one, and a best fit algorithm is adopted when the occlusion data after the registration is obtained one by one.
Optionally, the motion trajectory integration specifically includes: and (3) respectively registering occlusion of the molar area and the anterior molar area to the whole dentition by using static complete upper and lower jaw dentition data and adopting an optimal fitting algorithm, and fusing the lower jaw movement track to obtain a record of the whole oral tooth guide movement track.
Optionally, designing a prosthesis based on the dentition data and the occlusion data after the registration by teeth is completed by using a restoration design software.
Optionally, the method further comprises virtual occlusion detection and virtual blending, specifically: setting the contact strength between the prosthesis and the opposite jaw teeth, calling the lower jaw movement track, detecting the occlusion contact between the prosthesis side dentition with the opposite jaw teeth in the processes of protrusion and lateral movement by software, calculating the occlusion contact strength, automatically adjusting the occlusion surface form through Boolean operation and Laplace deformation, and removing occlusion interference points in the process of lower jaw movement to generate the functional prosthesis.
Optionally, the intraoral three-dimensional scanner is used to obtain complete maxillomandibular dentition data and static occlusion data of the patient at the static state.
A virtual bite detection and design system based on intraoral three-dimensional scanning, comprising:
an oral data acquisition module: the system is used for acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state;
the tooth motion track acquisition module: the system is used for utilizing the static occlusion data to correspond to the tooth position of the mandible in real time and acquiring the dynamic movement track of the tooth;
tooth motion trajectory integration module: the device is used for combining complete upper and lower jaw dentition data in a static state and fusing a lower jaw movement track to complete movement track integration;
dentition data segmentation module: drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth;
an occlusion data acquisition module: the occlusion data registration method comprises the steps of registering segmented single-tooth data to occlusion data one by taking the buccal side of a dental crown as a common area to obtain occlusion data after tooth-by-tooth registration;
a prosthesis design module: for designing a prosthesis based on static dentition data and occlusion data after a tooth-by-tooth registration.
Optionally, the system further comprises a virtual bite detection and virtual blending module: the method is used for setting the contact strength between a prosthesis and the opposite jaw teeth, calling the lower jaw movement track, detecting the occlusion contact between the prosthesis side dentition with the opposite jaw teeth in the processes of protrusion and lateral movement by software, calculating the occlusion contact strength, automatically adjusting the occlusion surface form through Boolean operation and Laplace deformation, and removing occlusion interference points in the process of lower jaw movement to generate the functional prosthesis.
Compared with the prior art, the technical scheme has the advantages that the virtual occlusion detection and design method and system based on the intraoral three-dimensional scanning are provided, the mode that the intraoral three-dimensional scanner obtains dynamic occlusion is improved, accurate static and dynamic occlusion data are obtained, and the accuracy and efficiency of prosthesis design and manufacture are greatly improved through automatic virtual occlusion detection and virtual blending. In addition, the virtual occlusion detection and the virtual blending of the prosthesis are automatically carried out according to the dynamic occlusion data, so that the adjustment and grinding of the prosthesis in clinic are reduced, and the precision and the efficiency of the prosthesis manufacturing are improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a virtual occlusion detection and design method based on intraoral three-dimensional scanning, which comprises the following steps as shown in figure 1:
s1: acquisition of static dentition data: the intraoral three-dimensional scanner is used to scan complete maxillary and mandibular dentition data and static occlusion data for a patient, wherein the occlusion data should include buccal occlusions from left and right premolars to molars.
S2: acquiring a dynamic motion track: after obtaining the static occlusion data, firstly, placing an intraoral scanner in a molar area, registering the current tooth position in real time by static tooth information when the lower jaw moves, and recording a molar occlusion path in a moving state. Recording an initial position F = (Fx, fy, fz) and other position coordinates S = (Sx, sy, sz) except the initial position by taking the tooth tip of a certain tooth as a reference, and recording a jaw movement track by transforming S = F × R + T through an RT matrix; and after the molar region is scanned, moving to the premolar region, and repeating the steps to obtain a premolar occlusion path and a mandible motion track in a motion state, wherein the premolar region and the premolar region have a certain overlapping region.
S3: motion trail integration: and taking static full dentition data as a common registration area, adopting a best fitting algorithm to respectively register the occlusion of the molar area and the anterior molar area to the full dentition, and fusing the mandibular movement track to obtain a record of the full-mouth dental guide movement track.
S4: tooth-by-tooth splicing to occlusion data: in the static dentition data, a boundary is drawn along a gingival margin and an adjacent surface contact area of the dental crown, and the single tooth is obtained by segmentation. And (3) taking the buccal side of the dental crown as a common area, and adopting a best fitting algorithm to register the segmented single-tooth data to occlusion data one by one to obtain occlusion data after tooth-by-tooth registration.
S5: designing a prosthesis: and designing a restoration in restoration design software based on the dentition data and the occlusion data after the tooth-by-tooth registration.
S6: virtual occlusion detection and virtual blending: the contact strength between the prosthesis and the opposing jaw teeth is set, for example, 0mm. And (3) calling the mandibular movement track in the step (3), detecting the occlusal contact between the restored side dentition and the opposite jaw teeth in the processes of protrusion and lateral movement by software, and calculating the occlusal contact strength. When the output numerical value is a positive value, indicating that data interference occurs, representing an occlusion early contact area or an interference area; when the output value is zero, the prosthesis is not in contact with the jaw teeth; when the output data is negative, the gap between the prosthesis and the occlusal surface of the opposite jaw tooth is indicated. Automatically adjusting the shape of the occlusal surface through Boolean operation and Laplace deformation, and removing occlusion interference points in the lower jaw movement process to generate the functional prosthesis.
The embodiment also discloses a virtual occlusion detection and design system based on intraoral three-dimensional scanning, as shown in fig. 2, including:
an oral data acquisition module: the system is used for acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state;
the tooth motion track acquisition module: the dynamic tooth movement track is obtained by utilizing the static occlusion data to correspond to the tooth position of the moving lower jaw in real time;
tooth motion trajectory integration module: the device is used for combining complete upper and lower jaw dentition data in a static state and fusing a lower jaw movement track to complete movement track integration;
dentition data segmentation module: drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth;
an occlusion data acquisition module: the occlusion data registration method comprises the steps of registering segmented single-tooth data to occlusion data one by taking the buccal side of a dental crown as a common area to obtain occlusion data after tooth-by-tooth registration;
a prosthesis design module: for designing a prosthesis based on static dentition data and occlusion data after a tooth-by-tooth registration.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A virtual occlusion detection and design method based on intraoral three-dimensional scanning is characterized by comprising the following steps:
acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state;
utilizing static occlusion data to correspond to the tooth position of the lower jaw during movement in real time to obtain the dynamic movement track of the teeth;
combining complete upper and lower jaw dentition data in a static state and fusing the lower jaw movement locus to complete movement locus integration;
drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth;
taking the buccal side of the dental crown as a common area, registering the segmented single-tooth data to occlusion data one by one to obtain occlusion data after tooth-by-tooth registration;
and designing the prosthesis based on the static dentition data and the occlusion data after the tooth-by-tooth registration.
2. The method of claim 1, wherein the static occlusion data comprises buccal occlusion of left and right premolars to molars.
3. The method for detecting and designing virtual occlusion based on intraoral three-dimensional scanning of claim 1, wherein the segmented single-tooth data is registered to the occlusion data one by one, and a best-fit algorithm is adopted when the occlusion data after registration one by one is obtained.
4. The method for detecting and designing virtual occlusion based on intraoral three-dimensional scanning according to claim 1, wherein the integration of motion trajectories is specifically as follows: and respectively registering occlusion of the molar area and the anterior molar area to the full dentition by using static complete upper and lower jaw dentition data and adopting a best fitting algorithm, and fusing the lower jaw movement track to obtain a record of the full-mouth dental guide movement track.
5. The method of claim 1, wherein the prosthesis is designed based on dentition data and occlusion data after registration from tooth to tooth.
6. The method for detecting and designing virtual occlusion based on intraoral three-dimensional scanning according to claim 1, further comprising virtual occlusion detection and virtual blending, specifically: setting the contact strength between the prosthesis and the opposite jaw teeth, calling the lower jaw movement track, detecting the occlusion contact between the prosthesis side dentition with the opposite jaw teeth in the processes of protrusion and lateral movement by software, calculating the occlusion contact strength, automatically adjusting the occlusion surface form through Boolean operation and Laplace deformation, and removing occlusion interference points in the process of lower jaw movement to generate the functional prosthesis.
7. The method for detecting and designing virtual occlusion based on intraoral three-dimensional scanning of claim 1, wherein the intraoral three-dimensional scanner is used to obtain complete maxillomandibular dentition data, static occlusion data and dynamic occlusion data of the patient in a static state.
8. A virtual occlusion detection and design system based on intraoral three-dimensional scanning, comprising:
an oral data acquisition module: the system is used for acquiring complete upper and lower jaw dentition data and static occlusion data of a patient in a static state;
the tooth motion track acquisition module: the system is used for utilizing the static occlusion data to correspond to the tooth position of the mandible in real time and acquiring the dynamic movement track of the tooth;
tooth motion trajectory integration module: the device is used for combining complete upper and lower jaw dentition data in a static state and fusing a lower jaw movement track to complete movement track integration;
dentition data segmentation module: drawing a boundary along a gingival margin and an adjacent surface contact area of the dental crown in the static dentition data, and segmenting to obtain a single tooth;
an occlusion data acquisition module: the occlusion data registration method comprises the steps of registering segmented single-tooth data to occlusion data one by taking the buccal side of a dental crown as a common area to obtain occlusion data after tooth-by-tooth registration;
a prosthesis design module: for designing a prosthesis based on static dentition data and occlusion data after a tooth-by-tooth registration.
9. The system of claim 8, further comprising a virtual bite detection and virtual blending module for: the method is used for setting the contact strength between a prosthesis and the opposite jaw teeth, calling the lower jaw movement track, detecting the occlusion contact between the prosthesis side dentition with the opposite jaw teeth in the processes of protrusion and lateral movement by software, calculating the occlusion contact strength, automatically adjusting the occlusion surface form through Boolean operation and Laplace deformation, and removing occlusion interference points in the process of lower jaw movement to generate the functional prosthesis.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116671956A (en) * | 2023-07-17 | 2023-09-01 | 广州医思信息科技有限公司 | Oral cavity data acquisition method based on comparison model |
| GB2625310A (en) * | 2022-12-13 | 2024-06-19 | Brian Nulty Adam | A method of generating manufacturing parameters during a dental procedure for a dental prosthesis |
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2022
- 2022-10-26 CN CN202211315284.4A patent/CN115607322A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2625310A (en) * | 2022-12-13 | 2024-06-19 | Brian Nulty Adam | A method of generating manufacturing parameters during a dental procedure for a dental prosthesis |
| CN116671956A (en) * | 2023-07-17 | 2023-09-01 | 广州医思信息科技有限公司 | Oral cavity data acquisition method based on comparison model |
| CN116671956B (en) * | 2023-07-17 | 2023-10-03 | 广州医思信息科技有限公司 | Oral cavity data acquisition method based on comparison model |
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Effective date of registration: 20240626 Address after: 100191 No. 22, Zhongguancun South Street, Haidian District, Beijing Applicant after: PEKING University SCHOOL OF STOMATOLOGY Country or region after: China Applicant after: SHINING 3D TECH Co.,Ltd. Address before: 100191 No. 22, Zhongguancun South Street, Haidian District, Beijing Applicant before: PEKING University SCHOOL OF STOMATOLOGY Country or region before: China |