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Zheng H, Shi L, Lu H, Liu Z, Yu M, Wang Y, Wang H. Influence of edentulism on the structure and function of temporomandibular joint. Heliyon 2023; 9:e20307. [PMID: 37829806 PMCID: PMC10565695 DOI: 10.1016/j.heliyon.2023.e20307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 09/11/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
Background With the acceleration of the aging process of the population, the number of edentulous patients continuously increased. Edentulism induces the loss of occlusal relationship and cause adverse effects on the stomatognathic system. Temporomandibular joint (TMJ), as a significant component of this system, may also be affected by edentulism in the process of supporting mandibular movement. Purpose Provide a comprehensive review of the structure and function of TMJ in the edentulous population, as well as the prevalence of temporomandibular joint disorder (TMD) in edentulous group. Study selection An electronic search was conducted on articles prior to December 2022 to filter all papers relevant to the structure and function of TMJ in edentulous population. The internet databases (PubMed, Cochrane Library, Embase) were searched using various combinations of keywords for "edentulism" or "edentulous" and "TMJ" or "TMD". Results Firstly, 522 articles were selected from the internet database, and finally, a total of 44 articles met the inclusion and exclusion criteria. The research content of these articles mainly focuses on the structure and function of TMJ in edentulous patients, as well as the clinical signs and symptoms of TMD. Conclusions Edentulous arch induces the loss of occlusal relationship, which may lead to degenerative changes of TMJ components consisting of changes in morphology and bone mass density of condyle, articular fossa, and articular eminence. In addition, the condyle could be shifted backward and upward, and displacement of the articular disc may occur after dentition loss. And the condyle and the articular disc may be guided back to the normal position after effective prosthodontic treatment. But the conclusions of the study on the function of TMJ and the prevalence of TMD in edentulous people are inconsistent. The condition of TMJ, especially the position of condyle-fossa and the symptoms and signs of TMD should not be ignored. If necessary, radiographic examinations should be performed.
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Affiliation(s)
- Huiyun Zheng
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Lei Shi
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Hongye Lu
- Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Zhichao Liu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Mengfei Yu
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Yu Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
| | - Huiming Wang
- Department of Oral Implantology, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Qiutao North Road 166, Hangzhou 310020, China
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Kranjcic J, Hunt D, Persic Kirsic S, Kovacic I, Vuksic J, Vojvodic D. Articular Eminence Morphology of American Historic and Contemporary Populations. Acta Stomatol Croat 2022; 55:397-405. [PMID: 35001935 PMCID: PMC8734448 DOI: 10.15644/asc55/4/7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 06/21/2021] [Indexed: 11/02/2022] Open
Abstract
Objectives This study was performed to determine the values of the articular eminence inclination (AEI), the articular eminence height (AEH), and the length of the articular eminence curved line (AEL) among American prehistoric and contemporary populations. Materials and methods The study was carried out on 120 human dry skulls divided into 4 groups: Illinois group (IP), Kentucky group (KP), African Americans group (AAP) and American Caucasians group (ACP). Each group comprised 30 human dry skulls. Measurements of AEI (by two methods), AEH and AEL were performed using computer software on 5 sagittal sections through silicone molds of the articular eminence. The obtained results were statistically analyzed at significance level of p < 0.05. Results No statistically significant differences of AEI, AEH and AEL values were obtained among American populations (IP, KP, AAP, ACP) neither by body side, sex and age (p > 0.05). The mean AEI M1 values ranged from 31.56° to 38.72°, the mean AEI M2 values ranged from 44.14° to 58.37°, the mean AEH ranged from 5.82 to 6.86 mm, and the mean AEL values ranged from 11.57 to 12.73 mm. Conclusions AEI, AEH, AEL values are variables, but they did not differ significantly among American populations. Left-right differences as the result of natural body asymmetry were not statistically significant. Sex and age did not significantly affect the articular eminence morphology.
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Affiliation(s)
- Josip Kranjcic
- School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia.,Clinical Hospital "Dubrava", 10000 Zagreb, Croatia
| | - David Hunt
- Smithsonian Institution, Washington, DC 20002, USA
| | | | - Ines Kovacic
- School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Josip Vuksic
- Clinical Hospital "Dubrava", 10000 Zagreb, Croatia
| | - Denis Vojvodic
- School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia.,Clinical Hospital "Dubrava", 10000 Zagreb, Croatia
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GÖRÜRGÖZ C, KURT H, ŞEKER Ç, İÇEN M, AKSOY S, ORHAN K. RELATIONSHIP BETWEEN THE DEGENERATIVE CHANGES IN THE MANDIBULAR CONDYLE AND ARTICULAR EMINENCE INCLINATION, HEIGHT, AND SHAPE: A CBCT STUDY. CUMHURIYET DENTAL JOURNAL 2022. [DOI: 10.7126/cumudj.949926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Vîrlan MJR, Păun DL, Bordea EN, Pellegrini A, Spînu AD, Ivașcu RV, Nimigean V, Nimigean VR. Factors influencing the articular eminence of the temporomandibular joint (Review). Exp Ther Med 2021; 22:1084. [PMID: 34447477 PMCID: PMC8355702 DOI: 10.3892/etm.2021.10518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 05/28/2021] [Indexed: 11/10/2022] Open
Abstract
The temporomandibular joint (TMJ), the most complex and evolved joint in humans, presents two articular surfaces: the condyle of the mandible and the articular eminence (AE) of the temporal bone. AE is the anterior root of the zygomatic process of the temporal bone and has an anterior and a posterior slope, the latter being also known as the articular surface. AE is utterly important in the biomechanics of the TMJ, as the mandibular condyle slides along the posterior slope of the AE while the mandible moves. The aim of this review was to assess significant factors influencing the inclination of the AE, especially modifications caused by aging, biological sex or edentulism. Studies have reported variations in the angles of the slopes of the AE between medieval and recent human dry skulls, as well as between subjects of different racial origin. Recent articles have emphasized the significant role that tooth loss has on the flattening of the AE. Although some papers have described biological sex or age as factors which could be associated with differences in AE angulations, edentulism seems to be a significant factor impacting on the inclination of the AE.
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Affiliation(s)
- Maria Justina Roxana Vîrlan
- Discipline of Oral Rehabilitation, Faculty of Dental Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Diana Loreta Păun
- Discipline of Endocrinology, Faculty of Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Elena Nicoleta Bordea
- Department of Specific Disciplines, Faculty of Midwifery and Nursing, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Angelo Pellegrini
- Department of Specific Disciplines, Faculty of Midwifery and Nursing, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Arsenie Dan Spînu
- Discipline of Urology, 'Dr Carol Davila' Central Military Emergency University Hospital, Faculty of Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Roxana Victoria Ivașcu
- Discipline of Anatomy, Faculty of Dental Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Victor Nimigean
- Discipline of Anatomy, Faculty of Dental Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Vanda Roxana Nimigean
- Discipline of Oral Rehabilitation, Faculty of Dental Medicine, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
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Comparison of Glenoid Fossa Morphology Between Different Sagittal Skeletal Pattern Using Cone Beam Computed Tomography. J Craniofac Surg 2021; 31:e789-e792. [PMID: 33136913 DOI: 10.1097/scs.0000000000006750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Morphology of glenoid fossa might help the clinician in the diagnosis, establishing more biological treatment modalities and treatment response between patients with different skeletal malocclusions. This study aimed to assess the glenoid fossa morphology in different sagittal facial types using CBCT. The CBCT images of 64 patients with normal vertical growth patterns were classified into class I, class II, and class III based on the skeletal sagittal analysis. Depth, width, and angle of glenoid fossa were measured and assessed on CBCT images. One-way analysis of variance (ANOVA) and Tukey post-hoc test were used to compare mean values among the groups. There was a significant statistical difference in means of glenoid fossa' width between groups with skeletal class III and skeletal class I (P value: 0.038). However, no significant statistical differences were found in angle(P value = 0.18) and depth (P value = 0.40) of glenoid fossa among 3 groups. This study showed the glenoid fossa in class I patients was wider than class III patients. There were no statistically significant differences in the angle and depth of glenoid fossa in patients with a different sagittal skeletal pattern.
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Unal Erzurumlu Z, Celenk P. A radiological evaluation of the effects of edentulousness on the temporomandibular joint. J Oral Rehabil 2019; 47:319-324. [PMID: 31729769 DOI: 10.1111/joor.12910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/03/2019] [Accepted: 11/07/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND The articular eminence of the temporomandibular joint is an anatomical structure exposed to functional loads resulting from masticatory forces. Tooth loss may change the biomechanics of the masticator system, and the articular eminence can be affected by this change. OBJECTIVE The aim of this study is to examine the relationship between the edentulousness and the articular eminence inclination of the temporomandibular joint. METHODS The articular eminence inclination was measured in panoramic radiographs in the right and left temporomandibular joint on a total of 100 patients (50 dentate and 50 edentulous). The articular eminence inclination of dentate and edentulous patients was compared, as well as the influence of gender and duration of edentulousness. RESULTS The mean articular eminence inclination value in the dentate group (42.6 ± 4.30 ) was higher than that of the edentulous group (35.1 ± 4.70 , P < .001). Although there was no significant difference between males and females in the dentate group with regard to articular eminence inclination (42.0 ± 4.70 and 42.9 ± 4.10 , respectively, P = .373), in the edentulous group, males had higher values as compared to females (37.1 ± 4.70 and 34.2 ± 4.50 , respectively, P = .003). Finally, the duration of edentulousness and the degrees of articular eminence inclination values did not show positive correlations (P = .782). CONCLUSION According to the results of this study, we found that edentulous patients had lower articular eminence inclination than dentate patients, and it was more prominent in female than male patients.
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Affiliation(s)
- Zerrin Unal Erzurumlu
- Department of Dentomaxillofacial Radiology, Ordu University Faculty of Dentistry, Ordu, Turkey
| | - Peruze Celenk
- Department of Dentomaxillofacial Radiology, Ondokuzmayis University Faculty of Dentistry, Samsun, Turkey
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Costa EDD, Peyneau PD, Roque-Torres GD, Freitas DQ, Ramírez-Sotelo LR, Ambrosano GMB, Verner FS. The relationship of articular eminence and mandibular fossa morphology to facial profile and gender determined by cone beam computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 128:660-666. [PMID: 31494114 DOI: 10.1016/j.oooo.2019.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 05/30/2019] [Accepted: 07/12/2019] [Indexed: 12/28/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the relationship of the morphology of the articular eminence and mandibular fossa to facial profile and sex by using cone beam computed tomography (CBCT) images. STUDY DESIGN CBCT examinations of 76 patients were conducted, and the patients were classified according to facial profile as dolichocephalic, mesocephalic, or brachycephalic. The inclination and height of the articular eminence and the inclination of the mandibular fossa of 152 temporomandibular joints were measured. Comparisons between these measurements and facial profile and gender were performed by 2-way analysis of variance with Tukey's post hoc test. Significance was established at α = 0.05. RESULTS Males with brachycephaly presented significantly greater values of eminence inclination compared with those with other facial types and greater values than patients with dolichocephaly for the measurements of eminence height and inclination of the fossa posterior wall (P ≤ .05). Females with brachycephaly presented significantly greater eminence height values compared with those with other facial profiles (P ≤ .05). No significant differences were observed between males and females. CONCLUSIONS The morphology of the articular eminence and the mandibular fossa is associated with facial profile, with males with brachycephaly showing greater inclination of the eminence and mandibular fossa. Articular eminence height in brachycephaly was greater in both sexes.
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Affiliation(s)
- Eliana Dantas da Costa
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Priscila Dias Peyneau
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | | | - Deborah Queiroz Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Laura Ricardina Ramírez-Sotelo
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Gláucia Maria Bovi Ambrosano
- Division of Biostatistics, Department of Social Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Francielle Silvestre Verner
- Department of Dentistry, Division of Oral Radiology, Federal University of Juiz de Fora/Governador Valadares Advanced Campus, Governador Valadares, Minas Gerais, Brazil.
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Nadaes MR, Lagos de Melo LP, Haiter Neto F, Freitas DQ. Correlation between temporomandibular joint temporal component pneumatization and morphology: analysis by cone beam computed tomography. Int J Oral Maxillofac Surg 2019; 48:779-786. [PMID: 30595235 DOI: 10.1016/j.ijom.2018.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 10/18/2018] [Accepted: 12/06/2018] [Indexed: 10/27/2022]
Abstract
The aim of this study was to evaluate whether a correlation exists between temporal bone pneumatization and the morphology of the articular eminence and glenoid fossa. A sample of 100 cone beam computed tomography scans was used, for a total of 200 temporomandibular joints (TMJ). Paracoronal and parasagittal images of the TMJ were evaluated by two examiners. For all TMJ, pneumatization was classified in the mid-lateral direction using a score of 0 or 1, and in the anteroposterior direction using a score ranging from 0 to 3. The inclination and height of the articular eminence and the thickness of the roof of the glenoid fossa were obtained. Pneumatization was found in the mid-lateral direction in 83.5% of the cases and in the anteroposterior direction in 88%. The age of the patient and side did not influence the prevalence or degree of pneumatization (P=0.051-0.953), but female patients showed more pneumatization in the mid-lateral direction than male patients (P=0.014). The presence of pneumatization did not affect articular eminence and mandibular fossa morphology. It is concluded that the presence and extent of pneumatization of the TMJ temporal component does not affect its morphology. However, professionals should be aware of the high prevalence of pneumatization and take this into account when performing TMJ assessment.
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Affiliation(s)
- M R Nadaes
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
| | - L P Lagos de Melo
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - F Haiter Neto
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - D Q Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
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Kaur S, Datta K. An in vitro study to evaluate the accuracy of orthopantomograph as an aid to determine condylar guidance. J Indian Prosthodont Soc 2018; 18:35-41. [PMID: 29430140 PMCID: PMC5799967 DOI: 10.4103/jips.jips_243_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 11/05/2017] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The study was conducted to evaluate the accuracy of orthopantomograph (OPG) as an aid to determine condylar guidance. METHODOLOGY The condylar guidance was measured using the impressions of glenoid fossae and radiographs (OPG) on thirty dried human skulls. Frankfurt horizontal plane (FHP) was used as a reference plane in both the methods and wire markers were adapted to make the contours of glenoid fossae discernible for both the methods. The condylar inclination angle was measured between FHP and a line joining the most concave point on the glenoid fossa with the most inferior point on the articular eminence on both right and left sides. RESULTS Pearson correlation was used for statistical analysis, and it showed a strong correlation between anatomic and radiographic methods (r = 0.864 for the left side, r = 0.873 for the right side) as well as between right and left sides (r = 0.830). The data were also subjected to regression analysis (linear and panel estimation approach) which showed that OPG could be effectively used to predict the condylar guidance (r2 = 0.6160). CONCLUSION Although OPG shows a higher value than anatomic method, it can be used as an aid to set condylar guidance on semi-adjustable articulator.
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Affiliation(s)
- Sukhjit Kaur
- Department of Prosthodontics and Crown and Bridge, Punjab Government Dental College and Hospital, Amritsar, Punjab, India
| | - Kusum Datta
- Department of Prosthodontics and Crown and Bridge, Punjab Government Dental College and Hospital, Amritsar, Punjab, India
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Verner FS, Roque-Torres GD, Ramírez-Sotello LR, Devito KL, Almeida SM. Analysis of the correlation between dental arch and articular eminence morphology: a cone beam computed tomography study. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 124:420-431. [PMID: 28847629 DOI: 10.1016/j.oooo.2017.07.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 07/10/2017] [Accepted: 07/19/2017] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of the study was to assess the correlation between the morphology of the dental arches (DAs) of patients with normal occlusion and of the articular eminence (AE) by using cone beam computed tomography (CBCT). STUDY DESIGN CBCT scans of 60 patients were evaluated in terms of height and inclinations (angles α, β, and δ) of the AE. DAs were classified according to their shapes (tapered, square, ovoid), and their perimeters, widths, and depths were measured. One-way analysis of variance, Pearson's correlation coefficients, and simple and multivariate linear regression models were used for the calculations. RESULTS The ovoid arch was the most predominant shape (n = 66/120). Inclination of the AE (angle β) had the greatest difference between DA shapes, with this angle usually being greater in the ovoid arch and smaller in the square arch (P < .05). The height of the AE presented greater correlation with DA measurements, with tapered arches having the most significant correlations (P < .05). DA depth had no influence on AE measurements (P > .05). The perimeter and width of the DAs had some influence (P < .05). CONCLUSIONS Correlations were found between the DA and AE morphologies. The correlations should be taken into consideration, although the results do not prove absolute association between the variables. Whenever possible, the morphologic features of DAs should be preserved to avoid possible changes in AE.
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Affiliation(s)
- Francielle Silvestre Verner
- Department of Dentistry, Division of Oral Radiology, Federal University of Juiz de Fora/Governador Valadares Advanced Campus, Governador Valadares, Minas Gerais, Brazil.
| | | | - Laura Ricardina Ramírez-Sotello
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Karina Lopes Devito
- Department of Dental Clinic, Division of Oral Radiology, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Solange Maria Almeida
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
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3D Morphology Analysis of TMJ Articular Eminence in Magnetic Resonance Imaging. Int J Dent 2017; 2017:5130241. [PMID: 28713426 PMCID: PMC5497647 DOI: 10.1155/2017/5130241] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 05/06/2017] [Accepted: 05/25/2017] [Indexed: 12/12/2022] Open
Abstract
Purpose The objective of this study was to evaluate the computational reconstruction of the articular eminence of the temporomandibular joint (TMJ) based on magnetic resonance imaging (MRI) and semiautomatic volumetric segmentation techniques for morphological classification of the TMJ structure. Materials and Methods A total of 36 MRI scans of TMJ individuals were selected and formatted by using the ITK-SNAP software, consisting of MRI segmentation and generation of 3D models. The TMJ articular eminences were also classified according to the morphology analysis of the articular eminence in 3D reconstructions. Two independent trained and calibrated investigators performed the image analysis, which was repeated after thirty days. Results There was no association between sex and eminence shape (p = 0.456). Fisher's test revealed no statistically significant association between disc classification and eminence shape on both sides (p = 0.629). Chi-square test showed a significant statistically association between disc classification and disc displacement (p = 0.000). Intra- and interrater correlation coefficients showed excellent reproducibility values. Conclusions Anatomical variability of the sample investigated was found, with predominantly round shape and presence of correlation between this shape and normal disc position. The correlation of flattened and convex shapes with disc position reduction indicated that type of disc derangement is more prevalent.
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SA SC, MELO SLS, MELO DPD, FREITAS DQ, CAMPOS PSF. Relationship between articular eminence inclination and alterations of the mandibular condyle: a CBCT study. Braz Oral Res 2017; 31:e25. [DOI: 10.1590/1807-3107bor-2017.vol31.0025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 03/03/2017] [Indexed: 11/21/2022] Open
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Kranjcic J, Slaus M, Persic S, Vodanovic M, Vojvodic D. Differences in skeletal components of temporomandibular joint of an early medieval and contemporary Croatian population obtained by different methods. Ann Anat 2015; 203:52-8. [PMID: 25899341 DOI: 10.1016/j.aanat.2015.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/11/2015] [Accepted: 03/12/2015] [Indexed: 11/25/2022]
Abstract
The temporomandibular joint (TMJ) is one of the most complex joints in the human body. The anatomical configuration of the TMJ allows for a large range of mandibular movements as well as transmission of masticatory forces and loads to the skull base. The measurements of the TMJ's anatomical structures and their interpretations contribute to the understanding of how pathological changes, tooth loss, and the type of diet (changing throughout human history) can affect biomechanical conditions of the masticatory system and the TMJ. The human TMJ and its constituent parts are still the subject of extensive investigation and comparisons of measurement methods are being made in order to determine the most precise and suitable measurement methods. The aim of this study has been to examine the morphology of skeletal components of TMJ of an early medieval population (EMP) in Croatia and to compare measured values with TMJ values of the contemporary Croatian population (CP) using various methods of measurement. The study was performed on 30 EMP specimens - human dry skulls, aged from 18 to 55 years, and 30 CP human dry skulls, aged from 18 to 65 years. Only fully preserved specimens (in measured areas) were included. The articular eminence (AE) inclination was measured in relation to the Frankfurt horizontal using two methods. Also, the AE height (glenoid fossa depth) and the length of the curved line - highest to the lowest point of the AE were measured. Measurements were performed on lateral skull photographs, panoramic radiographs and lateral cephalograms using VistaMetrix software on skull images. The results were statistically analyzed using SPSS statistical software. No statistically significant differences were obtained for AE parameters between the EMP and CP populations independent of age and gender. However, statistically significant (p<0.05) differences were revealed when comparing results of three different measuring methods. It could not be determined which of the used measurement methods is the most accurate due to the different results obtained as well as the presence of possible shortcomings and limitations of the various methods (measuring points are difficult to determine and/or they are not clearly observed in the investigated images to be precisely marked and measured; distortion and magnification of structures on radiographic images are present). Therefore, due to the limitations of this study, the obtained results could serve only as orienting information.
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Affiliation(s)
- Josip Kranjcic
- Department of Fixed Prosthodontics, School of Dental Medicine, University of Zagreb, Gunduliceva 5, 10000 Zagreb, Croatia.
| | - Mario Slaus
- Anthropological Centre, Croatian Academy of Sciences and Arts, Ante Kovacica 5, 10000 Zagreb, Croatia.
| | - Sanja Persic
- Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Gunduliceva 5, 10000 Zagreb, Croatia.
| | - Marin Vodanovic
- Department of Dental Anthropology, School of Dental Medicine, University of Zagreb, Gunduliceva 5, 10000 Zagreb, Croatia.
| | - Denis Vojvodic
- Department of Fixed Prosthodontics, School of Dental Medicine, University of Zagreb, Gunduliceva 5, 10000 Zagreb, Croatia; Department of Prosthodontics, Clinical Hospital "Dubrava", Av. Gojka Suska 6, 10000 Zagreb, Croatia.
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Shahidi S, Vojdani M, Paknahad M. Correlation between articular eminence steepness measured with cone-beam computed tomography and clinical dysfunction index in patients with temporomandibular joint dysfunction. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 116:91-7. [PMID: 23768876 DOI: 10.1016/j.oooo.2013.04.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Revised: 03/21/2013] [Accepted: 04/04/2013] [Indexed: 01/04/2023]
Abstract
OBJECTIVE The purpose of this study was to investigate the correlation between articular eminence steepness and clinical dysfunction index (Di) in patients with temporomandibular joint dysfunction (TMD) using cone-beam computed tomography (CBCT). STUDY DESIGN In this study, CBCT images of 60 temporomandibular joints in 30 patients with TMD were evaluated. The eminence inclination values were measured on CBCT images. Patients were subdivided into 3 groups based on Helkimo's clinical Di. The data were analyzed using Spearman's rho correlation coefficient test. RESULTS The results of the present study did not confirm any significant differences in the values of articular eminence inclinations among the 3 groups (P value >.05). CONCLUSION Based on the present study, there is no apparent relationship between the articular eminence inclination and the clinical Di in patients with TMD.
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Affiliation(s)
- Shoaleh Shahidi
- Biomaterial Research Center, Oral and Maxillofacial Radiology Department, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran
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