Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position

Objectives: The temporomandibular joint (TMJ) is a complex, highly specialized joint. Along with the teeth, these joints are considered to be a “tri-joint complex.” Mandibular condyle morphology is characterized by a rounded bone projection with an upper biconvex and oval surface in axial plane. Anatomical knowledge of the TMJ is one of the basic foundations of clinical practice, allowing the understanding of TMJ pathologies and fabrication of condylar prostheses. The cross-sectional descriptive study was undertaken to evaluate normal variation in the condylar morphology on radiographs in persons without TMJ symptomatology and its relation to age, gender, dentition status, chewing habits, parafunctional habits, history of orthodontic treatment, and denture wearing was assessed. Material and Methods: A total of 350 subjects without TMJ symptomatology included in the study were further grouped by age, gender, dentition status, chewing habits, parafunctional habits, history of orthodontic treatment, and denture wearing history. Panoramic radiograph was taken for the assessment of condylar morphology. Results: A significant association between dentition status and bilaterally similar condylar morphology was noticed. Bilaterally similar condyles were seen in 81.4% of subjects. Round-shaped condyles were seen in 176 (62%) persons. Loss of bilateral occlusion tends to alter the condylar morphology. Association between normal chewing habits and bilaterally similar condyle shapes was significant. Conclusion: The study describes the normal morphology of mandibular condyles in a population attending the tertiary dental care center, Kozhikode. The dentition status and chewing habits of individuals had a significant role in determining condylar morphology.

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“…Above researchers also did not find significant association between the groups to the condylar characteristics. [ 20 ]…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Normal Morphology of Mandibular Condyle: A Radiographic Survey

Singh

Kumar²,

Balan

et al. 2020

JCIS

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“…The highly scattered radiation during image acquisition adversely affects the contrast in the projection data and the final reconstructed images 8. Despite these limitations, CBCT has become a highly preferred imaging modality for evaluation of the osseous structures of the TMJ 391011…”

Section: Introductionmentioning

confidence: 99%

Reliability of cone-beam computed tomography for temporomandibular joint analysis

Gorucu-Coskuner

Atik

2019

Korean J Orthod

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ObjectiveThe aim was to assess the intraobserver and interobserver reliabilities of temporomandibular joint linear measurements and condylar shape classifications performed with cone-beam computed tomography (CBCT).MethodsCBCT images of 30 patients were measured at two different time points by two orthodontists using the Dolphin 3D program (n = 60). Anterior, posterior, and superior joint space measurements and sagittal joint morphology classification in the sagittal view and medial and lateral joint space and mediolateral width measurements and coronal joint morphology classification in the coronal view were recorded. Intraclass-interclass correlation coefficients (ICC) and kappa statistics were used to assess intraobserver and interobserver reliability for the measurements and morphology classifications, respectively.ResultsThe ICC values were good for measurements of the posterior joint space by observer I and for measurements of the posterior, medial, and lateral joint spaces by observer II, while the other intraobserver measurements were excellent. Only the mediolateral width measurements showed excellent interobserver ICC values, while the other measurements showed good interobserver ICC values. Intraobserver agreement for the sagittal morphology classifications was moderate (κ = 0.479) and almost perfect (κ = 0.858) for observers I and II, respectively, while the corresponding agreement for the coronal morphology classifications was substantial for both observers. The interobserver agreement values for sagittal and coronal morphology classifications were slight (κ = 0.181) and fair (κ = 0.265), respectively.ConclusionsLinear temporomandibular joint measurements were reproducible and reliable in both intraobserver and interobserver evaluations. However, interobserver agreement for assessments of condylar shape was low.

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“…3,6 Currently, CBCT is the imaging modality of choice to investigate bone alterations of the TMJ, since it is possible to obtain sections of this structure on several levels. 6,15,16,17,18 Accordingly, the morphology of the osseous joint components, cortical bone integrity, and subcortical bone changes can be viewed using CBCT.…”

Section: Introductionmentioning

confidence: 99%

Relationship between articular eminence inclination and alterations of the mandibular condyle: a CBCT study

Cruz

Melo

et al. 2017

Braz. oral res.

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This study aimed at verifying the correlation among angulation of the articular eminence (AE), shape of the condyle and its degenerative bone diseases (DBDs), according to age and sex, through Cone Beam Computed Tomography (CBCT). Five hundred and twenty-eight temporomandibular joints (TMJ) were evaluated. The condyles were classified as: flat, convex, angled and rounded, and the AE angulation was measured. The DBDs evaluated were osteophytes, flattening, erosion, subcortical cysts and spinal sclerosis. There was no difference in the mean angulations in relation to age group (p>0.05). In age groups of 60-69 years (p=0.003) and 70 years or over (p=0.021), the angulation was higher in males. There was an association between DBD and sex (p=0.047), in that the prevalence was higher in females. Differences in AE angles were not observed in condyles with one or no DBDs (p>0.05). However, the presence of two or more DBDs led to a decrease in the angle (p<0.05). Angled condyles showed higher AE angulations than the flat and convex types (p<0.01). In conclusion, the AE inclination is influenced by DBD and condyle shape; an association of two or more bone diseases in the condyle, or its flat or convex anatomy, results in a decrease in the angulation.

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Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position

Cited by 33 publications

References 26 publications

Evaluation of Normal Morphology of Mandibular Condyle: A Radiographic Survey

Evaluation of Normal Morphology of Mandibular Condyle: A Radiographic Survey

Reliability of cone-beam computed tomography for temporomandibular joint analysis

Relationship between articular eminence inclination and alterations of the mandibular condyle: a CBCT study

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