Relationship between alteration of horizontal size and bony morphological change in the mandibular condyle

Kitamura, Hiroshi; Koike, Tomoyuki; Narikawa, J; Nakatsuka, Atsushi; Kobayashi, H; Kurashina, Kenji

doi:10.1259/dmfr/70038602

Cited by 16 publications

(9 citation statements)

References 9 publications

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“…Other methods reported in the literature offer scales for the severity of TMD changes but do not do so specifically for OA. 20 22 23 For this reason, this study expanded the investigation of the patterns (based on both sex and age) of radiography features associated with the severity of TMJ-OA.…”

Section: Discussionmentioning

confidence: 99%

“…Other methods reported in the literature offer scales for the severity of TMD changes but do not do so specifically for OA. 20,22,23 For this reason, this study expanded the investigation of the patterns (based on both sex and age) of radiography features associated with the severity of TMJ-OA. In this study, the overall prevalence of TMJ-OA was reported to be 65.5%, which closely aligns with the reported prevalence of full-body OA of approximately 68.3%.…”

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confidence: 99%

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Incidental findings of temporomandibular joint osteoarthritis and its variability based on age and sex

et al. 2020

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Purpose: This study investigated the prevalence of temporomandibular joint osteoarthritis (TMJ-OA) using the Research Diagnostic Criteria for Temporomandibular Disorders image analysis criteria, assessed the severity of incidental osteoarthritic changes affecting the TMJ, and evaluated the correlations of sex and age with the prevalence and severity of TMJ-OA. Materials and Methods: This retrospective study assessed 145 randomly selected cone-beam computed tomography scans (261 TMJs) from the authors' institutional maxillofacial radiology archive following the application of inclusion and exclusion criteria. The criteria described by Ahmad et al. were used to determine whether each TMJ was affected by OA, and the severity of the osteoarthritic changes was scored for each joint based on the method described by Alexiou et al. The chi-square, McNemar, Bhapkar chi-square, and Stuart-Maxwell chi-square tests were applied to evaluate the significance of the relationships between variables (age and sex). Results: Sixteen TMJs (6.1%) had no OA, 74 (28.6%) were indeterminate for OA, and 171 (65.5%) had OA. Flattening and sclerosis were observed in 86.6% and 12.3% of cases, respectively, while resorption was observed in 7.3% of the joints. Only 21 (8.1%) of the examined TMJs had subchondral cysts. Erosion of the articular eminence was observed in 58 (22.1%) cases, while sclerosis and resorption were found in 68 (25.9%) and 16 (6.1%) TMJs, respectively. Conclusion: Female patients had a higher prevalence and severity of TMJ-OA than male patients. The prevalence and severity of TMJ-OA increased with age, with peaks in the fifth and seventh decades of life.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Incidental findings of temporomandibular joint osteoarthritis and its variability based on age and sex

et al. 2020

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“…Quantitative assessment of the joint morphology can be useful for estimating bone loss and hyperplasia in joint disorders. Animal models and epidemiological studies have established that joint size is a relevant risk factor for degenerative joint diseases using MRI data and digital post-processing [4,26,27]. Due to the limitation of detecting bony tissues by MRI technique, these radiological analyses lack detailed information about the condylar surface morphology.…”

Section: Discussionmentioning

confidence: 99%

Mandibular asymmetry: a three-dimensional quantification of bilateral condyles

et al. 2013

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IntroductionThe shape and volume of the condyle is considered to play an important role in the pathogenesis of the mandibular deviation. Curvature analysis is informative for objectively assess whether the shape of the condyles matches that of the glenoid fossa. In this study, a three-dimensional (3-D) quantification of bilateral asymmetrical condyles was firstly conducted to identify the specific role of 3-D condylar configuration for mandibular asymmetry.Methods55 adult patients, 26 males (26 ± 5 yrs) and 29 females (26 ± 5 yrs), diagnosed with mandibular asymmetry were included. The examination of deviation of chin point, deviation of dental midlines, inclination of occlusal plane, and depth of the mandibular occlusal plane were conducted. After the clinical investigation, computed tomography images from the patients were used to reconstruct the 3-D mandibular models. Then the condylar volume, surface size, surface curvature and bone mineral density were evaluated independently for each patient on non-deviated and deviated sides of temporomandibular joint.ResultsBoth the condylar surface size and volume were significantly larger on deviated side (surface size: 1666.14 ± 318.3 mm2, volume: 1981.5 ± 418.3 mm3). The anterior slope of the condyle was flatter (0.12 ± 0.06) and the posterior slope (0.39 ± 0.08) was prominently convex on the deviated side. The corresponding bone mineral density values were 523.01 ±118.1 HU and 549.07 ±120. 6 HU on anterior and posterior slopes.ConclusionsThe incongruence presented on the deviated side resulted in a reduction in contact areas and, thus, an increase in contact stresses and changes of bone density. All aforementioned results suggest that the difference existing between deviated and non-deviated condyles correlates with facial asymmetrical development. In mandibular asymmetry patients, the 3-D morphology of condyle on deviated side differ from the non-deviated side, which indicates the association between asymmetrical jaw function and joint remodeling.

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“…16 Scoring options used in the RDC/TMD, do not define the severity of the observed changes. In the literature, methods are described [17][18][19] that allow the evaluation of the severity of erosions and osteophyte formation as slight, moderate or extensive. It would be beneficial to assess the severity of these features in a long term study, to rate the process of repair or continuation of degeneration.…”

Section: Discussionmentioning

confidence: 99%

The prevalence of TMJ osteoarthritis in asymptomatic patients with dentofacial deformities: a cone-beam CT study

Krisjane

Urtane

Krumina

et al. 2012

International Journal of Oral and Maxillofacial Surgery

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Relationship between alteration of horizontal size and bony morphological change in the mandibular condyle

Abstract: The results of this study suggest a possible relationship between decreased horizontal condylar size and RLC. It is also suggested that sagittal bone changes do not influence the horizontal size of the condyle.

Cited by 16 publications

References 9 publications

Incidental findings of temporomandibular joint osteoarthritis and its variability based on age and sex

Incidental findings of temporomandibular joint osteoarthritis and its variability based on age and sex

Mandibular asymmetry: a three-dimensional quantification of bilateral condyles

The prevalence of TMJ osteoarthritis in asymptomatic patients with dentofacial deformities: a cone-beam CT study

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