Evaluation of the anatomical measurements of the temporomandibular joint by cone-beam computed tomography (original) (raw)
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Dental Research Journal
Background: The etiology of temporomandibular disorders (TMDs) is complex and associated with multiple predisposing and initiating factors. Articular eminence morphology and steep eminence inclination have been postulated as the etiological factors, but there has been no clear evidence of association of morphology of the temporomandibular joints (TMJ) complex as a probable predisposing factor in the pathogenesis of TMDs. Materials and Methods: This was a cross-sectional, case-control study, and cone-beam computed tomography scans, and the evaluation was performed for 60 joints in 30 patients with symptomatic TMDs and for 40 healthy joints of 20 age-matched patients. One-way ANOVA, post hoc, unpaired t-test, Chi-square, and intra-class correlation coefficient test were used to determine the correlation between the TMJ articular eminence inclination, height, condylar bone changes, condyle, and fossa shapes with symptomatic TMDs. The P < 0.05 were considered statistically significant. Results: There was a statistically significant difference of articular eminence inclination and height with a steeper eminence inclination in the control group (P = 0.044*, and 0.035*). The condylar bone changes were found to be significantly more in the TMJ disorder group (P = 0.001*). There was no significant association of condyle and fossa shapes (P = 0.482 and 0.689) and of articular eminence inclination and height with condylar bone changes (P = 0.695, 0.498, 0.192, and 0.823) and condyle shapes (P = 0.389, 0.521, 0.260, and 0.387). The eminence inclination was not associated with fossa shapes (P = 0.471 and 0.086), but eminence height was associated with fossa shapes in the TMJ disorder group (P = 0.043* and 0.111). Conclusion: The results depicted that there was no significant association between TMJ complex anatomy and TMJ disorders in the present study population.
Morphometric evaluation of the temporomandibular joint on cone-beam computed tomography
Surgical and Radiologic Anatomy, 2020
Introduction Evaluation of the temporomandibular joint (TMJ) pathologies with cone-beam computed tomography (CBCT) provides essential information about the bone structures of the TMJ. It is important to know the normal reference range when defining these pathologies. The aim of this study is to examine the morphometric and morphologic analyses of the bone structures of TMJ on the CBCT images in detail according to age, gender, and joint side. Material and methods A total of 35 parameters related to the condylar process, articular tubercle, mandibular fossa, ramus of mandible, and joint space were examined on the CBCT images. These parameters were compared with the joint sides and gender, and correlated with age. Results Thirty-five parameters were evaluated. A statistically significant difference was found between genders in 22 parameters and joint sides in 6 parameters. When the correlation of parameters with age was examined; it was found that there was a very weak positive relationship in nine parameters, a weak positive relationship in one parameter, and a very weak relationship in the negative direction in two parameters. Conclusion In this study, the condylar process, articular tubercle, mandibular fossa, ramus of mandible, and joint spaces, which are usually examined separately in the literature, were examined, and the normal reference range was determined for all these parameters. We think that these normal reference ranges will be useful for researchers interested in TMJ pathologies.
Oral Radiology, 2017
Cone-beam computed tomography • Articular eminence • Temporomandibular dysfunction • Temporomandibular joint morphology cific clinical parameters and temporomandibular dysfunction (TMD) [4-7]. The widely studied variables include the articular eminence inclination, condyle position, condyle shape, and fossa shape [5, 6, 8, 9]. Many methods have been used to examine the TMJ morphology. Standard two-dimensional projections of the TMJ, taken for example from the transcranial view, are of limited clinical utility. For example, superimposition of overlying structures can limit the ability to visualize pathological changes in the TMJ [10, 11]. Cone-beam computed tomography (CBCT) is often recommended as a dosesparing technique for maxillofacial imaging [12]. Previous reports have suggested that CBCT can provide accurate and Abstract Objective We examined the bone components of the temporomandibular joint (TMJ) in asymptomatic individuals and patients with temporomandibular dysfunction (TMD) using cone-beam computed tomography (CBCT). Methods Two hundred asymptomatic individuals and 200 patients with TMD were included in this study. Condyle position, eminence height, eminence inclination, condyle shape, and fossa shape were assessed on CBCT images of the 800 temporomandibular joints. Results The eminence inclination (P < 0.05), eminence height (P < 0.0001), mediolateral width of condyle (P < 0.0001), and anterior joint space (P < 0.0001) were significantly greater in male subjects compared with female subjects in both the asymptomatic group and TMD group. Comparisons of the asymptomatic group and TMD group revealed significant differences in the anterior joint space (P < 0.0001), ratio of anterior joint space to posterior joint space (P < 0.001), posterior joint space (P < 0.05), eminence inclination (P < 0.05), eminence height (P < 0.05), condyle shape (P < 0.0001), and fossa shape (P < 0.05). Conclusions The present analyses suggest that a steeper articular eminence inclination may be risk factor for TMD. The presence of TMD was associated with the condyle position in the TMJ.
The International journal of prosthodontics, 2018
This retrospective cohort study in an asymptomatic nonpatient population evaluated the prevalence of specific morphologic changes usually associated with the presence of degenerative joint diseases (DJD) using cone beam computed tomography (CBCT) and examined the associations between DJD and age, sex, and number of teeth present. CBCT images (268 TMJs) of 134 asymptomatic patients were studied. Patient data were obtained from clinical records, and calibrated examiners interpreted the CBCT images. The presence or absence of traditional radiographic signs of DJD (erosion, generalized sclerosis, osteophytes, and subchondral cysts) in the condyle and articular eminence of each TMJ were evaluated. The data were submitted to bivariate (chi-square and Fisher exact tests) and multivariate (Poisson regression) analyses (α = .05). The sample was primarily composed of men (52.24%) and individuals aged ≥ 61 years (55.64%); 61.94% were partially edentulous with ≤ 12 teeth in the oral cavity. The...
Temporomandibular Joint Anatomy Assessed by CBCT Images
Aim. Since cone beam computed tomography (CBCT) has been used for the study of craniofacial morphology, the attention of orthodontists has also focused on the mandibular condyle. The purpose of this brief review is to summarize the recent 3D CBCT images of mandibular condyle. Material and Methods. The eligibility criteria for the studies are (a) studies aimed at evaluating the anatomy of the temporomandibular joint; (b) studies performed with CBCT images; (c) studies on human subjects; (d) studies that were not clinical case-reports and clinical series; (e) studies reporting data on children, adolescents, or young adults (data from individuals with age ≤ 30 years). Sources included PubMed from June 2008 to June 2016. Results. 43 full-text articles were initially screened for eligibility. 13 full-text articles were assessed for eligibility. 11 articles were finally included in qualitative synthesis. The main topics treated in the studies are the volume and surface of the mandibular condyle, the bone changes on cortical surface, the facial asymmetry, and the optimum position of the condyle in the glenoid fossa. Conclusion. Additional studies will be necessary in the future, constructed with longitudinal methodology, especially in growing subjects. The limits of CBCT acquisitions are also highlighted.
European Journal of Dentistry
Objectives: The aim of the study is to investigate the condylar position and its relation to articular eminence and axial condylar angle in temporomandibular joint disorder (TMD) patients and in normal controls using cone beam computed tomography (CBCT). Materials and Methods: CBCT temporomandibular joint (TMJ) images of 70 participants (38 males and 32 females, mean age 26.4 years) were analyzed. They were divided into control group (including 35 subjects) and study group (including 35 subjects). Linear measurements of joint space and condyle determined the condylar position of each TMJ. Articular eminence height and inclination were also measured with axial condylar angle to determine its relation to condylar position. Independent and paired sample t-test was applied to compare between the groups and TMJ sides of the same group at significance level of 0.05. Results: Statistical significant differences were found between males and females of both groups regarding superior joint sp...
The temporal-mandibular joint composes one of the most important articulations in the skull anatomy, aiding in such essential functions as articulation, mastication among other facial-oral functions. Proper functioning of this joint is thus of paramount significance in day to day life, with the influence important factors including the integrity of the glenoid fossa, the menisci, articulating condyles as well as the support factors like the attaching muscles and ligaments. Mandibular pathologies are hard to diagnose with most patients individually devising relieving mechanisms and often adapting to the aches and pain that characterize the presentation, and dental clinical examination often may overlook the mandibular signs. This study's objective was to determine the proportion of dental students assessing temporal-mandibular joint disorders through the means of clinical examination among those attending Sharif Medical and Dental College Lahore. Randomly selected 120 students attending the clinic for TMJ complaints provided information for this study's findings.
Current Concepts About Temporomandibular joint disorders: A Review Article
Journal of Research in Medical and Dental Science, 2020
Temporomandibular joint is formed by the mandibular condyle inserting into the mandibular fossa of temporal bone. It’s considered as ginglymoarthroidal joint which mean that is capable of both hinge type and gliding movements. TMD affects up to 15% of adults, with a peak incidence at 20 to 40 years of age. However, it can be classified as intra-articular or extra- articular. The incidence varies from 21.5% to 50.5%. The prevalence of TMD is about 3.7-12% greater in women than men. There are two types of treatment: conservative and surgical. We all believe that the valid diagnosis is the key to successful treatment on account of TMD multifactorial nature and often of patients suffering from other disorder simultaneously that can make the correct diagnosis difficult. Manual TMJ inspection was and remain self-evident manner used to detect joint dysfunction related to clinical findings. The primary study should be plain radiography (transcranial, trans maxillary views) or panoramic radi...
2020
Introduction: Conditions of the temporomandibular joint (TMJ) are affected by changes in movement and load during the joint’s function, which can cause morphological changes in hard tissues, such as the condyle. Panoramic radiographs can provide an indication of changes in hard tissues in TMJ. Objectives: The aim of this study was to determine whether there was any correlation between mandibular condyle shapes as seen on panoramic radiographs and TMJ conditions in adult female participants. Methods: The participants of this study were 75 adult female patients who underwent a panoramic radiograph examination conducted at the Maranatha Dental Hospital Radiology Unit. The patients were clinically examined based on the Research Diagnostic Criteria for Clinical Temporomandibular Disorder (RDC/TMD) questionnaire and also their panoramic radiographs. The data from the patients were categorized into four groups according to the RDC/TMD: normal, muscle disorders, disc displacement, and other...
International Journal of Dentistry Research, 2019
The temporomandibular joint (TMJ) is the joint of the mandibular condyle with the glenoid fossa of the temporal bone and is the only joint in the head that is responsible for opening and closing movements of the jaw. Cliking is the most frequent symptom indicating temporomandibular joint dysfunction. Several radiographic techniques are used to establish the diagnosis in the examination of the temporomandibular joint. This research was carried out using closed mouth TMJ radiography. The purpose of this study was to determine the height and width of the mandibular condyle and the form of eminence with and without clicking using TMJ radiographs. This research is a descriptive analytic study. The results showed that the average height of the mandibular condyle with clicking was 18,796 mm and without clicking was 22,812 mm. The average width of the mandibular condyle with cliking is 11673mm and without cliking is 11,181mm. The average form of articular eminence with clicking is 36.754 ° ...