CN210749670U - Individualized condylar prosthesis - Google Patents
Individualized condylar prosthesis Download PDFInfo
- Publication number
- CN210749670U CN210749670U CN201920740118.6U CN201920740118U CN210749670U CN 210749670 U CN210749670 U CN 210749670U CN 201920740118 U CN201920740118 U CN 201920740118U CN 210749670 U CN210749670 U CN 210749670U
- Authority
- CN
- China
- Prior art keywords
- condylar
- prosthesis
- personalized
- height
- retention handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000014759 maintenance of location Effects 0.000 claims abstract description 30
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- 210000004373 mandible Anatomy 0.000 claims description 13
- 229920002530 polyetherether ketone Polymers 0.000 claims description 13
- 239000010936 titanium Substances 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- 230000007547 defect Effects 0.000 claims description 10
- 210000005036 nerve Anatomy 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 210000001738 temporomandibular joint Anatomy 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 210000001847 jaw Anatomy 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000003902 lesion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 206010068975 Bone atrophy Diseases 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001054 cortical effect Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000002740 Muscle Rigidity Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001055 chewing effect Effects 0.000 description 1
- 238000007408 cone-beam computed tomography Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000008921 facial expression Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 201000005299 metal allergy Diseases 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000011164 ossification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000002054 transplantation Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Images
Landscapes
- Prostheses (AREA)
Abstract
The utility model discloses a personalized condylar prosthesis, which comprises a condylar head prosthesis, a condylar neck prosthesis and a retention handle which are integrally formed from top to bottom; the inner and outer diameters of the condylar-cephalad prosthesis are 2/3 of the inner and outer diameters of the original condylar-cephalad in CT data of a patient or are cylindrical; the diameter of the cylindrical shape is 6-8 mm, and the height of the cylindrical shape is 6-8 mm. The utility model provides a condylar prosthesis that exists among the prior art need grind the problem of a large amount of bone tissue in order to adapt to the prosthesis appearance.
Description
Technical Field
The utility model belongs to the technical field of artificial joint, concretely relates to individualized condylar prosthesis.
Background
Temporomandibular joint (TMJ) is one of the most complex joints of the human body, having left and right linked joints that move in rotation and sliding, and that participate in chewing, speech, swallowing, facial expression, and the like. The occurrence of diseases such as joint rigidity, trauma, tumor and the like often causes morphological defects and function loss of temporomandibular joints, seriously affects the life quality of patients, and how to perform ideal function appearance reconstruction, recover stable occlusion relation, mandibular ascending and supporting height and the like is a problem which needs to be faced and solved when the defects are repaired. Autologous bone grafting can only achieve functional approximations, cannot achieve anatomical reconstructions, and is prone to donor area complications. Allogeneic bone transplantation mainly comprises immunological rejection reaction, and the osteogenesis speed is slow; the artificial temporomandibular joint has the advantages of stability, no absorption, capability of simulating normal anatomical morphology, fit with a host, no need of additional material taking, immediate functional training after operation, avoidance of bone adhesion and the like, so that the joint reconstruction of the artificial temporomandibular joint is one of the clinically selectable effective methods.
The existing foreign standard type products have fewer finished product models and cannot meet all clinical requirements, the products are designed according to the characteristics of jaws of Europe and America and have certain difference with the anatomical structure of Chinese people, a large amount of bone tissues need to be ground in the operation to adapt to the appearance of the prosthesis during the application, and the operation difficulty is high. And part of patients have metal allergy.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a personalized condyle prosthesis, the problem that the condyle prosthesis in the prior art needs to grind off a large amount of bone tissues to adapt to the appearance of the prosthesis is solved.
The technical proposal adopted by the utility model is that the individualized condylar prosthesis comprises a condylar head prosthesis, a condylar neck prosthesis and a retention handle which are integrally formed from top to bottom; the inner and outer diameters of the condylar-cephalad prosthesis are 2/3 of the inner and outer diameters of the original condylar-cephalad in CT data of a patient or are cylindrical; the diameter of the cylindrical shape is 6-8 mm, and the height of the cylindrical shape is 6-8 mm.
The utility model discloses a characteristics still lie in:
the height and the width of the retention handle are matched with the height and the width of the defect area after the patient mandible support is osteotomy.
The ratio of the height of the retention handle to the height of the defect area is (1-1.5): 1.
The ratio of the width of the retention handle to the width of the defect area is (1-1.5): 1.
The thickness of the retention handle is 1.5-2.5 mm.
At least 2 titanium nail holes are reserved on the outer side surface of the retention handle; the position of the titanium nail hole avoids the lower alveolar nerve.
The diameter of the titanium nail hole is 1.5-2 mm.
The condylar head prosthesis, the condylar neck prosthesis and the retention handle are all made of polyether-ether-ketone.
The utility model has the advantages that:
the utility model relates to an individualized condylar prosthesis, which is consistent with the lower jaw shape of a patient and is more fit with the jaw, a large amount of bone tissues are not needed to be ground in the operation to adapt to the appearance of the prosthesis, the occurrence of complications in the operation and after the operation is effectively reduced, the operation time is shortened, and the optimal stress distribution can be reached after the implantation; and the polyether-ether-ketone has excellent physical and chemical properties, biological and mechanical properties, biocompatibility and natural radiation transmission, compared with metal materials, the elastic modulus of the polyether-ether-ketone is closer to that of human cortical bone, and the bone absorption and bone atrophy caused by stress shielding can be effectively reduced.
Drawings
Fig. 1 is a side view of the personalized condylar prosthesis of the present invention assembled with a patient's mandible;
fig. 2 is a schematic structural view of the personalized condylar prosthesis of the present invention;
fig. 3 is a front view of the personalized condylar prosthesis of the present invention;
fig. 4 is a posterior view of the personalized condylar prosthesis of the present invention;
fig. 5 is the STL model of the mandible a in step 2 of the method for designing a personalized condylar prosthesis of the present invention.
In the figure, 1 is a condylar head prosthesis, 2 is a condylar neck prosthesis, 3 is a retention handle, and 4 is a titanium nail hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the personalized condylar prosthesis of the present invention comprises a condylar head prosthesis 1, a condylar neck prosthesis 2, and a retention handle 3, which are integrally formed from top to bottom; the inner and outer diameters of the condylar-cephalad prosthesis 1 are 2/3 or cylindrical of the inner and outer diameters of the original condylar-cephalad in CT data of a patient; the diameter of the cylindrical shape is 6-8 mm, and the height of the cylindrical shape is 6-8 mm.
The height and the width of the retention handle 3 are matched with the height and the width of the defect area after the patient mandible support osteotomy.
The ratio of the height of the retention handle 3 to the height of the defect area is (1-1.5): 1.
The ratio of the width of the retention handle 3 to the width of the defect area is (1-1.5): 1.
The thickness of the retention handle 3 is 1.5-2.5 mm.
At least 2 titanium nail holes 4 are reserved on the outer side surface of the retention handle 3; the position of the titanium nail hole 4 avoids the lower alveolar nerve.
The diameter of the titanium nail hole 4 is 1.5-2 mm.
The condylar-head prosthesis 1, the condylar-neck prosthesis 2 and the retention handle 3 are all made of polyether-ether-ketone.
The utility model discloses individualized condylar prosthesis's design process as follows:
the method is implemented according to the following steps:
the specific process of the reverse reconstruction is as follows: selecting data on the opposite side of a lesion area in an STL model of the mandible a by utilizing the characteristic of natural symmetry of two sides of the mandible, and mapping the data to the lesion area in a mirror symmetry manner to obtain related data of a condylar head and neck prosthesis model;
the forward design includes the following two parts:
(1) performing condylar head reducing design on the condylar head and neck prosthesis model data;
(2) designing a retention handle;
the specific process of reducing design is as follows: the inner and outer diameters of the condylar heads are correspondingly reduced to 2/3 or a cylinder of the inner and outer diameters of the original condylar heads; the diameter of the cylindrical shape is 6-8 mm, and the height of the cylindrical shape is 6-8 mm;
the specific process of the design of the retention handle is as follows: the ratio of the height of the retention handle to the height of the condylar cervical prosthesis is (0.8-1.5): 1; the ratio of the width of the retention handle to the width of the condylar cervical prosthesis is (0.5-1.5): 1; the thickness of the retention handle is 1.5-3 mm; the lower end of the retention handle is trimmed into a round blunt shape; at least 2 titanium nail holes are reserved on the outer side surface of the retention handle, and the positions of the titanium nail holes are kept away from the lower alveolar nerve; the diameter of the titanium nail hole is 1.5-3 mm;
the specific process of trimming is as follows: trimming the sharp edge of the cheek side of the stump of the mandible into a round blunt shape;
the detailed process of fine adjustment is as follows: and deleting visible sharp corner features, undercut and undulation, and performing smoothing treatment.
The personalized condylar prosthesis is manufactured by 3D printing through an FDM or SLS method.
When the FDM method is used for 3D printing manufacturing, a polyether ether ketone (PEEK) special implant 3D printer is used for layer-by-layer printing; the specific parameters are, nozzle diameter: 0.4mm, printing speed: 40mm/s, print line width: 0.4mm, layer thickness: 0.2mm, nozzle temperature: 420 ℃, filling ratio: 100%, material: polyetheretherketone.
When 3D printing manufacturing is carried out by an SLS method, a layer of powder material is flatly paved on the upper surface of a molded part by adopting a powder paving roller, a control system controls a laser beam to scan on the powder according to the section profile of the layer, so that the temperature of the powder is raised to a melting point (temperature 343 ℃), sintering is carried out, and bonding is realized with a molded part below; after the sintering of one layer of section is finished, the workbench descends by the thickness of one layer, the material spreading roller spreads a layer of uniform and dense powder on the material spreading roller, and the sintering of a new layer of section is carried out until the whole model is finished.
The laser used for SLS is a carbon dioxide laser, and the material used is implant grade polyetheretherketone. After the entity is constructed and the prototype part is sufficiently cooled, the powder quickly rises to the initial position, is taken out, is placed on a post-processing workbench, and is subjected to post-processing such as sand blasting/polishing to complete the manufacture of the PEEK personalized PEEK condylar prosthesis. The specific parameters are as follows: ammonia or argon, thickness of the processing layer: 0.1mm, scanning speed: 3000mm/s, laser power: 30W, scanning pitch: 0.1mm, melting point temperature: 343 ℃.
The individualized condylar prosthesis of the utility model is matched with the lower jaw shape of a patient and is more attached to the jaw, a large amount of bone tissues are not needed to be ground in the operation to adapt to the appearance of the prosthesis, the occurrence of complications in the operation and after the operation is effectively reduced, the operation time is shortened, and the optimal stress distribution can be reached after the implantation; and the polyether-ether-ketone has excellent physical and chemical properties, biological and mechanical properties, biocompatibility and natural radiation transmission, compared with metal materials, the elastic modulus of the polyether-ether-ketone is closer to that of human cortical bone, and the bone absorption and bone atrophy caused by stress shielding can be effectively reduced.
It should be noted that: the figures are all for the case where the inner and outer radii of the condylar head are 2/3 of the original inner and outer radii of the condylar head.
Claims (8)
1. A personalized condylar prosthesis, comprising: comprises a condylar head prosthesis (1), a condylar neck prosthesis (2) and a retention handle (3) which are integrally formed from top to bottom; the inner diameter and the outer diameter of the condylar head prosthesis (1) are 2/3 of the inner diameter and the outer diameter of the original condylar head in CT data of a patient or are cylindrical; the diameter of the cylindrical shape is 6-8 mm, and the height of the cylindrical shape is 6-8 mm.
2. The personalized condylar prosthesis of claim 1, wherein: the height and the width of the retention handle (3) are matched with the height and the width of a defective area after the mandible support of a patient is osteotomy.
3. The personalized condylar prosthesis of claim 2, wherein: the ratio of the height of the retention handle (3) to the height of the defect area is (1-1.5): 1.
4. The personalized condylar prosthesis of claim 2, wherein: the ratio of the width of the retention handle (3) to the width of the defect area is (1-1.5): 1.
5. The personalized condylar prosthesis of claim 1, wherein: the thickness of the retention handle (3) is 1.5-2.5 mm.
6. The personalized condylar prosthesis of claim 1, wherein: at least 2 titanium nail holes (4) are reserved on the outer side surface of the retention handle (3); the position of the titanium nail hole (4) avoids the lower alveolar nerve.
7. The personalized condylar prosthesis of claim 6, wherein: the diameter of the titanium nail hole (4) is 1.5-2 mm.
8. The personalized condylar prosthesis of any of claims 1-7, wherein: the condylar head prosthesis (1), the condylar neck prosthesis (2) and the retention handle (3) are all made of polyether ether ketone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740118.6U CN210749670U (en) | 2019-05-22 | 2019-05-22 | Individualized condylar prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740118.6U CN210749670U (en) | 2019-05-22 | 2019-05-22 | Individualized condylar prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210749670U true CN210749670U (en) | 2020-06-16 |
Family
ID=71064780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920740118.6U Expired - Fee Related CN210749670U (en) | 2019-05-22 | 2019-05-22 | Individualized condylar prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210749670U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI740702B (en) * | 2020-11-04 | 2021-09-21 | 財團法人工業技術研究院 | Temporomandibular joint prosthesis |
| CN113768669A (en) * | 2021-08-31 | 2021-12-10 | 西安医学院 | Preparation method of personalized biphase condylar stent |
-
2019
- 2019-05-22 CN CN201920740118.6U patent/CN210749670U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI740702B (en) * | 2020-11-04 | 2021-09-21 | 財團法人工業技術研究院 | Temporomandibular joint prosthesis |
| US11801145B2 (en) | 2020-11-04 | 2023-10-31 | Industrial Technology Research Institute | Temporomandibular joint prosthesis |
| CN113768669A (en) * | 2021-08-31 | 2021-12-10 | 西安医学院 | Preparation method of personalized biphase condylar stent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110251275B (en) | Design method of personalized condylar prosthesis | |
| Joffe et al. | Computer-generated titanium cranioplasty: report of a new technique for repairing skull defects | |
| Singare et al. | Fabrication of customised maxillo‐facial prosthesis using computer‐aided design and rapid prototyping techniques | |
| Peng et al. | Rapid prototyping-assisted maxillofacial reconstruction | |
| US20060212158A1 (en) | System for manufacturing an implant | |
| CN109620437B (en) | Preparation method of 3D printed porous root-shaped dental implant | |
| CN103750923A (en) | Artificial temporal-mandibular joint based on selective laser melting technology and manufacturing method thereof | |
| CN210749670U (en) | Individualized condylar prosthesis | |
| CN203988499U (en) | The net bag type mandibular bone implants of applying three-dimensional printing technique | |
| CN111084675A (en) | Preparation method of personalized customized craniomaxillofacial bone surgical repair and reconstruction implant | |
| CN104127265A (en) | String bag type lower jawbone implant applying three-dimensional printing technology | |
| CN111202601A (en) | Directly-implanted personalized alveolar bone repair prosthesis and preparation method thereof | |
| CN110353835A (en) | A kind of personalized composite construction dental implant preparation method of immediate implant | |
| CN111986310A (en) | Design method of mandible porous implant considering soft tissue attachment and bone growth and porous implant | |
| CN102451048B (en) | Complex-shaped gel-metal composite prosthesis and manufacturing method thereof | |
| WO2013034180A1 (en) | Mandibular implant | |
| Ding et al. | Digital fabrication of a maxillary obturator prosthesis by using a 3-dimensionally–printed polyetheretherketone framework | |
| CN210749669U (en) | Customized condylar prosthesis | |
| CN106822990A (en) | The artificial eye socket bone preparation method of perforated sectional | |
| JP2019217266A (en) | Production method for 3d custom-made implant | |
| CN108236508B (en) | NiTi memory personalized self-expansion thread groove embedded porous structure implant and manufacturing method thereof | |
| Chandra et al. | Application of rapid manufacturing techniques in support of maxillofacial treatment: evidence of the requirements of clinical applications | |
| CN109646151B (en) | Cleft lip and palate repairing bone implant and preparation method thereof | |
| Bi et al. | Digital workflow for auricular prosthesis fabrication with a negative mold | |
| Ali et al. | Combined digital–conventional workflow to fabricate a definitive obturator from an interim obturator for a patient with an anterior maxillectomy defect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |