Original Research Article Journal of Oral Medicine, Oral Surgery, Oral Pathology and Oral Radiology (original) (raw)
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Cumhuriyet Dental Journal
Objectives: This study aimed to analyze the articular eminence inclination and height and correlate these findings with the eminence shapes and degenerative condylar changes using cone-beam computed tomography (CBCT). Materials and Methods: The assessments were established on CBCT images of 566 temporomandibular joints (TMJ) that were included from the computer database. Age and gender were recorded for all individuals. Degenerative changes were examined in the articular surface of the condyle. The articular eminence (AE) inclination and height measurements were performed on central parasagittal slices of the TMJ. The shape of the AE was classified as box, sigmoid, flattened, and deformed. Results: The prevalence of degenerative changes in the condyle was higher in males, but no significant difference was found (p ˃ 0.05). The AE inclination and height have a relation with gender and age groups. The AE inclination and height results were greater in males (p < 0.05). The reduced m...
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 2017
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. Oneway 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.
Degenerative bone changes in TMJ assessed by cone beam computed tomography
RGO - Revista Gaúcha de Odontologia, 2016
Objective To assess the degenerative bone changes of the jaw head and the condylar mobility regarding gender and age. Methods The sample was composed of 106 CBCT images for TMJ region from patients over 18 years old, from both genders, from the archives of a radiological clinic in the city of Campina Grande, Paraíba, Brazil. The images were obtained from patients in maximum intercuspal and maximum mouth opening. The images were examined by a radiologist, through the software Xoran CAT(r), using a monitor with high resolution of and maximum color quality (12 bits) in a low light environment. It was assessed tomographic aspects of bone degenerative changes (flattening, erosion, osteophytes, bone sclerosis and pseudocyst) of both TMJ of each patient. The association among the degenerative changes of the jaw head, gender and age were investigated through Fisher's exact test, G-test and chi-squared test. The data obtained regarding condylar mobility (normo, hyper and hypoexcursion), ...
Radiological examination of the articular eminence morphology using cone beam CT
Dentomaxillofacial Radiology, 2012
The purpose of the present study was to investigate the articular eminence inclination and height according to age and gender in patients with temporomandibular joint (TMJ) dysfunction and healthy controls using cone beam CT (CBCT). Methods: The measurements were performed on CBCT records of 52 TMJ dysfunction patients (11 males and 41 females) and 41 control patients (17 males and 24 females). The eminence inclination and height were measured on the CBCT images. Results: The eminence inclination and height values were higher in males than in females in both TMJ dysfunction patient and control groups; however, these differences were not statistically significant (p. 0.05). While no statistically significant differences were found in the eminence inclination and height values between the age groups (p. 0.05) in the TMJ dysfunction patient group, there were statistically significant differences in the control group. The eminence inclination was highest between the ages of 21 and 30 years and showed a decrease after the age of 30 years. Additionally, the eminence inclinations of the control patients were statistically higher than those of the TMJ dysfunction patients. Conclusion: There were no statistically significant differences in eminence inclination and height according to gender. The eminence inclination reaches its highest value between the ages of 21 and 30 years and shows a decrease after the age of 31 years in healthy patients. The eminence inclination was steeper in healthy control patients than in patients with TMJ dysfunction.
Innovative Publication, 2016
Objective: The objective of present study is to assess the age and gender related changes in articular eminence inclination by best fit line method and top roof line method. This study is also implemented to predict the age of subjects on the basis of inclination angle by best fit line method and top roof line method. Material and Methods: The CBCT scan of 206 subjects were used in present study. The cone beam images (Scans) were obtained from Care stream 9000cc (USA) CBCT machine at 90 Kvp,4 mA for 6.3 seconds at FOV 17x6 and voxel size of 200.The TMJ was defined on 0.5 mm-thick axial slices. One of the axial views on which the condylar processes were seen with their widest mediolateral extent was used as a reference view for secondary reconstruction. The lateral slices of the TMJ were performed perpendicular to the long axis of the condylar process with 1mm thickness and the coronal slices were performed parallel to the long axis of the condylar process with 1mm thickness on the selected axial image. Results: The articular eminence inclination was statistically significant in males and females in both best fit line method and top roof line method. By Best fit line method, it was found that highest articular eminence inclination was 52.31±16.08 0 in age group 31-40 years while it was lowest 49.02±12.49 0 in age group 41-50 years. However by Top roof line method, it was found that the articular eminence inclination was highest 33.16±8.66 0 in age group 21-30 years and lowest 31.50±8.92 0 in 31-40 years.The co-relation between age groups and articular eminence inclination by Best fit line method was stastically significant. Conclusion: Age plays an important role in articular eminence inclination by top roof line method and best fit line method. The age of an individual can be predicted if eminence inclination angle is known.
Indian Journal of Radiology and Imaging
Background The temporomandibular joint (TMJ) is included in the category of ginglymoarthrodial synovial joints. The mandibular condyle plays a vital part in the development of the craniofacial complex. Hence, the evaluation and assessment of the condylar volume and its morphology are of utmost importance. Aim The aim of this research was to use cone beam computed tomography (CBCT) imaging modality to evaluate the morphology of the mandibular condyle and glenoid fossa in a selected population and document any morphometric changes. Setting and Design It is an observational study. Materials and Methods A retrospective CBCT analysis was performed on 119 patients. The length, width, height, linear measurements of the joint spaces (anterior, posterior, and superior), volume of the condyle, and roof of glenoid fossa thickness were evaluated on both the left and right sides in both males and females. Results The height, width, and length of mandibular condyle were significantly increased in...
2019
Aim: The aim of the study was to compare two radiographic techniques, orthopantomograph (OPG), and cone-beam computed tomography (CBCT) in determining the sagittal condylar guidance (SCG) and to find out if CBCT can serve as an alternative aid to program semi-adjustable and fully adjustable articulators. Materials and Methods: Following the inclusion and exclusion criteria, 40 individuals (20 males and 20 females) aged between 20 and 40 years were selected. An OPG and a CBCT radiograph were obtained for each individual. Using appropriate software, the SCG was measured for both the sides, for both the radiographic methods. The values for each individual were obtained by two investigators for both the methods using the respective software and the average value was taken. After performing the Shapiro–Wilk test, paired t-test was used to compare the mean difference pairwise (for both right and left side) while t-test was used to compare the mean difference between two groups. Results: R...
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.
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.
Objectives: Three-dimensional evaluation of TMJ changes in patients with inadequately supported occlusion in comparison to age and sex matching volunteers with adequately supported occlusion using cone beam computed tomography. Patients and Methods: This study was conducted on 40 TMJs in 20 participants (10 patients and 10 healthy volunteers) with ages ranging between 20-40 years. All the participants were examined clinically and by Cone Beam Computed Tomography to evaluate TMJ bony changes. Results: There were no significant differences in most of the CBCT radiographic findings between patients and healthy volunteers except for condyle position and width (p= 0.01, p= 0.001). Also, there was no statistically significant correlation between clinical findings and CBCT radiographic findings among patients except for significant association between condyle morphology and limited mouth opening. Conclusion: We observed a significant association between inadequate supported occlusion and condyle position and width.