The Clinical Significance of the Horizontal Condylar Angle in Patients with Temporomandibular Disorders

Sato, Hiroki; Fujii, Tetsunori; Kitamori, Hidecki

doi:10.1080/08869634.1997.11746016

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…8 Moreover, a close relationship between the morphologic changes of the condyle and TMJ internal derangement 20 has been reported, and patients with temporomandibular arthritis tend to have high angles. 12 Considering these previous reports, various changes in the TMJ caused by compromised masseter function are believed to correlate with Figure 1. Summary of the experimental time schedules.…”

Section: Introductionmentioning

confidence: 99%

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Masseter Muscular Weakness Affects Temporomandibular Synovitis Induced by Jaw Opening in Growing Rats

Ozaki

Kaneko

Soma

2008

The Angle Orthodontist

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Objective: To evaluate the influence of impaired masseter function during growth on the development of temporomandibular synovitis. Materials and Methods: Sixteen 3-week-old male Wistar rats were classified into four groups. The first group served as control; and in the second group, jaw opening was forced for 3 hours when the rats were 9 weeks old. In the third and fourth groups, the masseter muscles were bilaterally resected at 3 weeks of age, and the rats in the fourth group were additionally forced to open their jaw at 9 weeks of age. All rats were sacrificed at 9 weeks. Temporomandibular joint (TMJ) tissue samples were processed for histology, and evaluated for cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expressions by immunohistochemistry to examine the inflammatory changes in the synovial membrane. Results: The control group showed noninflammatory changes. In the jaw-opening group, vascular dilation and weak COX-2 immunoreactivity were induced by jaw opening in the synovium. In the masseter-resection group, the masseter-resected rats exhibited moderate synovial changes while in the resection with opening group, the masseter-resected rats revealed more significant inflammatory changes including synovial hyperplasia, dilated vasculature, fibrin deposits, and intense immunoreactivity for COX-2 and iNOS, all caused by jaw opening. Conclusions: These results suggest that masseter activity in the growth period is an important factor in the induction of temporomandibular synovitis.

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Section: Introductionmentioning

confidence: 99%

“…A series of arthroscopic 12 and histopathologic investigations 13 on TMD have revealed the occurrence of inflammation in the synovial membrane. Recent studies have identified that the activation of cyclooxygenase-2 (COX-2) 14,15 or the inducible nitric oxide synthase (iNOS) 16 pathway is involved in the pathogenesis of TMD.…”

Section: Introductionmentioning

confidence: 99%

Masseter Muscular Weakness Affects Temporomandibular Synovitis Induced by Jaw Opening in Growing Rats

Ozaki

Kaneko

Soma

2008

The Angle Orthodontist

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“…However, these limitations can be minimized by first taking a submento-vertex image. Such an image provides a supplementary view 90°to the transcranial radiograph [22,26] and also shows the angle of the condylar axis. This favors the individualization of the incidence by means of a projection parallel to the long axis of the condyle and thus diminishes the superimposing of adjacent structures [21].…”

Section: Transcranial Radiographymentioning

confidence: 99%

“…Williamson et al [21] When associated with taking transcranial images, provides a supplementary view at 90°, increasing its diagnostic power for bone alterations of the TMJ Sato et al [22], Williamson et al [21] Simple and of low cost Dixon [23] Transcranial radiography a Visualization of only the lateral part of the joint, fractures with great displacement, and great bone alterations due to arthritis in the lateral portion of the TMJ Pullinger and Hollender [25] If it precedes a submento-vertex, it provides a supplementary view at 90°L ysell and Petersson [26], Sato et al [22] Provides individualization of incidence, diminishing superimpositions of adjacent structures…”

Section: Panoramic Radiographymentioning

confidence: 99%

“…Thus, taking of laminographs must be preceded by submento-vertex radiography [21]. When taking a transcranial image, submento-vertex radiography produces a supplementary view 90°to the transcranial radiograph, increasing diagnostic power for bone alterations in the TMJ [21,22]. Other advantages include its ease of use and low cost [23] (Table 1).…”

Section: Submento-vertex Radiographymentioning

confidence: 99%

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Imaging diagnosis of the temporomandibular joint: critical review of indications and new perspectives

et al. 2009

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In recent decades, there have been important developments in temporomandibular joint (TMJ) imaging. New techniques complement preexisting methods, and each modality is indicated for specific conditions in accordance with the clinical diagnosis. The aim of this review is to give an overview of conventional and new techniques in TMJ imaging. The literature review includes studies published between 1976 and 2009 that appear in the Medline database. Magnetic resonance imaging remains the ''gold standard'' modality for TMJ analysis. It allows structures to be visualized without radiation whether or not they are mineralized; however, it is costly and complex. Ultrasonography, an alternative method with increasing importance in TMJ analysis, is a simple, noninvasive, and low-cost technique that allows for the visualization of the position of the disk; however, it does not detect condylar abnormalities. Reconstructions in three-dimensions can be obtained with computed tomography, magnetic resonance imaging, and ultrasonography and can be used to obtain rapid prototyping biomodels. Health professionals performing TMJ imaging exams should consider clinical history and findings, exam cost, radiation exposure, results of previous exams, and whether the current result will influence diagnosis and treatment planning.

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Greater mandibular horizontal condylar angle is associated with temporomandibular joint osteoarthritis

Lee

Stanton

Hollender

2017

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

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The Clinical Significance of the Horizontal Condylar Angle in Patients with Temporomandibular Disorders

Cited by 12 publications

References 11 publications

Masseter Muscular Weakness Affects Temporomandibular Synovitis Induced by Jaw Opening in Growing Rats

Masseter Muscular Weakness Affects Temporomandibular Synovitis Induced by Jaw Opening in Growing Rats

Imaging diagnosis of the temporomandibular joint: critical review of indications and new perspectives

Greater mandibular horizontal condylar angle is associated with temporomandibular joint osteoarthritis

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