Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint
Background/purpose: Occlusion is an important component of temporomandibular joint (TMJ). Little is known about the association between missing teeth and TMJ changes. The purpose of this study was to determine if a correlation exists between unilateral missing posterior teeth and changes in the incl...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-12-01
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| Series: | Journal of Dental Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1991790215000045 |
| _version_ | 1828281845909815296 |
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| author | Meng-Ta Chiang Tsung-I Li Hsiao-Wen Yeh Chi-Chun Su Kuo-Chou Chiu Ming-Pang Chung Ren-Yeong Huang Yi-Shing Shieh |
| author_facet | Meng-Ta Chiang Tsung-I Li Hsiao-Wen Yeh Chi-Chun Su Kuo-Chou Chiu Ming-Pang Chung Ren-Yeong Huang Yi-Shing Shieh |
| author_sort | Meng-Ta Chiang |
| collection | DOAJ |
| description | Background/purpose: Occlusion is an important component of temporomandibular joint (TMJ). Little is known about the association between missing teeth and TMJ changes. The purpose of this study was to determine if a correlation exists between unilateral missing posterior teeth and changes in the inclination of the articular eminence (AE).
Materials and methods: A total of 106 joints in 53 patients (20 men and 33 women) with unilateral posterior edentulism were included. In the same patients, the sagittal outline of the AE and glenoid fossa was traced in panoramic radiographs. The sagittal condylar path inclination was constructed by joining the crest of the glenoid fossa and the crest of AE. This was then related to the constructed Frankfurt's horizontal plane to determine the inclination of AE. The results were subjected to the one-way analysis of variance test. A P value of <0.05 was considered to be statistically significant.
Results: In this study 27% of the individuals were right posterior edentulous and 26% were left posterior edentulous. The mean value of AE inclination was 37.7°, ranging from 4° to 58°. A trend showing increased inclination angle in the nonmissing side compared with the missing side was observed (P > 0.05). The inclination of AE in men was higher than in women on both the missing side and the nonmissing side (P > 0.05). The symmetry equality between the missing and the nonmissing side joint was 1.89%. This value was higher (3%) in the female group than in the male group (0%). Comparing the absolute mean differences, the female group showed a lower difference (9.8°) than the male group (12.11°).
Conclusion: A wide range of values of AE inclination was found regardless of other factors such as side of teeth loss and the sex of patients. |
| first_indexed | 2024-04-13T08:20:44Z |
| format | Article |
| id | doaj.art-f2f12ac97c7e4d538524b482a580ddf2 |
| institution | Directory Open Access Journal |
| issn | 1991-7902 |
| language | English |
| last_indexed | 2024-04-13T08:20:44Z |
| publishDate | 2015-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dental Sciences |
| spelling | doaj.art-f2f12ac97c7e4d538524b482a580ddf22022-12-22T02:54:39ZengElsevierJournal of Dental Sciences1991-79022015-12-0110438338710.1016/j.jds.2015.02.001Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular jointMeng-Ta Chiang0Tsung-I Li1Hsiao-Wen Yeh2Chi-Chun Su3Kuo-Chou Chiu4Ming-Pang Chung5Ren-Yeong Huang6Yi-Shing Shieh7Department of Oral Diagnosis & Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Oral Diagnosis & Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Operative Dentistry and Endodontology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Operative Dentistry and Endodontology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Oral Diagnosis & Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Operative Dentistry and Endodontology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Dentistry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCDepartment of Operative Dentistry and Endodontology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROCBackground/purpose: Occlusion is an important component of temporomandibular joint (TMJ). Little is known about the association between missing teeth and TMJ changes. The purpose of this study was to determine if a correlation exists between unilateral missing posterior teeth and changes in the inclination of the articular eminence (AE). Materials and methods: A total of 106 joints in 53 patients (20 men and 33 women) with unilateral posterior edentulism were included. In the same patients, the sagittal outline of the AE and glenoid fossa was traced in panoramic radiographs. The sagittal condylar path inclination was constructed by joining the crest of the glenoid fossa and the crest of AE. This was then related to the constructed Frankfurt's horizontal plane to determine the inclination of AE. The results were subjected to the one-way analysis of variance test. A P value of <0.05 was considered to be statistically significant. Results: In this study 27% of the individuals were right posterior edentulous and 26% were left posterior edentulous. The mean value of AE inclination was 37.7°, ranging from 4° to 58°. A trend showing increased inclination angle in the nonmissing side compared with the missing side was observed (P > 0.05). The inclination of AE in men was higher than in women on both the missing side and the nonmissing side (P > 0.05). The symmetry equality between the missing and the nonmissing side joint was 1.89%. This value was higher (3%) in the female group than in the male group (0%). Comparing the absolute mean differences, the female group showed a lower difference (9.8°) than the male group (12.11°). Conclusion: A wide range of values of AE inclination was found regardless of other factors such as side of teeth loss and the sex of patients.http://www.sciencedirect.com/science/article/pii/S1991790215000045articular eminencepanoramic radiographsposterior edentuloustemporomandibular joint |
| spellingShingle | Meng-Ta Chiang Tsung-I Li Hsiao-Wen Yeh Chi-Chun Su Kuo-Chou Chiu Ming-Pang Chung Ren-Yeong Huang Yi-Shing Shieh Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint Journal of Dental Sciences articular eminence panoramic radiographs posterior edentulous temporomandibular joint |
| title | Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint |
| title_full | Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint |
| title_fullStr | Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint |
| title_full_unstemmed | Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint |
| title_short | Evaluation of missing-tooth effect on articular eminence inclination of temporomandibular joint |
| title_sort | evaluation of missing tooth effect on articular eminence inclination of temporomandibular joint |
| topic | articular eminence panoramic radiographs posterior edentulous temporomandibular joint |
| url | http://www.sciencedirect.com/science/article/pii/S1991790215000045 |
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