An evaluation of the relationship between the range of mandibular opening and the condyle positions in functional panoramic radiographs (original) (raw)
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Padjadjaran Journal of Dentistry
Introduction: Clicking is the most common clinical symptom in patients with Temporomandibular Disorder (TMD). Lacking attention by either the patient or dentist, many patients were found to have suffered from morphologic alteration of the condyles seen in the panoramic radiograph inadvertently. The purpose of the study was to determine the differences of condyle morphology of the Temporomandibular Joint (TMJ) with and without the existence of clicking by means of digital panoramic radiographs. Methods: This study was based on an analytic descriptive research, whereas subjects are digital panoramic radiographs taken from clicking and non-clicking patients at the Radiology Installation of Dental Hospital Universitas Padjadjaran. 16 samples of each group were chosen in a non-random purposive sampling manner. Results: The research showed the mean of condyle morphology, HOC height on clicking (6.31 mm) was shorter than the non clicking (7.63 mm), the width of HOC on clicking (10.38 mm) ...
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 ° ...
Evaluation of condylar position from temporomandibular joint radiographs
The Journal of Prosthetic Dentistry, 1985
T he position of the mandibular condyles in the glenoid fossae is an important factor in treatment planning for temporomandibular joint (TM J) disorders, myofascial pain-dysfunction, and occlusal rehabilitation. However, the interpretation of condylar position from radiographs and the usefulness of such radiographic information relative to various treatment procedures are still controversial."9 Several investigatorsi0-'2 have indicated that the wide range of normal anatomic variation makes it impossible to predict the precise location of the condyle or to measure the actual distances between points on the condyle and fossa. On the other hand, WeinbergI reported that condylar asymmetry does not affect the superior portion of the joint, and he concluded that condylar position can be determined if radiographic measurements are limited to this region. Other investigator.?' reported that TM J radiogiaphs can only record the relative position of joint structures and that no attempt should be made to obtain direct measurements of the joint space.
Alexandria Dental Journal
BACKGROUND: Temporomandibular disorders (TMDs) are common conditions affecting the jaws with a prevalence rate ranging between 28%-88%. Finding a link between the temporomandibular joint (TMJ) morphology and the prevalence of TMDs may aid in the early identification and treatment of these disorders. Study objective: The aim of this study was to correlate between clinical and radiographic findings of TMDs using panoramic radiographs. MATERIALS AND METHODS: The study included patients complaining of TMDs, who had been categorized into three groups based on Helkimo clinical dysfunction index: mild, moderate and severe TMD. Panoramic radiographs were taken for all patients to evaluate its diagnostic efficacy in TMD patients. RESULTS: A sample of 30 patients (24 females and 6 males) were included in the current study. There were statistically significant differences in linear measurements between the three TMD groups (mild, moderate and severe), but no statistically significant differences were detected in the angular measurements. CONCLUSION: Based on the study findings, it can be concluded that some panoramic parameters provide valuable information that can aid clinicians in formulating proper treatment and follow up plans for TMD patients.
2014
Mandible kinematics was assessed in a group of 13 adult women with severe temporomandibular disorders (TMD) and a group of 13 healthy women, matched by age, performing free maximum mouth opening (MMO) and closing. By means of an optoelectronic motion analyzer and a biomechanical model of analysis, 3D displacements and velocities were calculated for the interincisal point and the two condylar reference points, as well as the three Cardan angles of the mandible. Also, the splitting of condylar movement in its rotational and translational components was evaluated in each 10% step of both opening and closing mandibular motion. TMD patients showed significantly reduced maximum mouth aperture together with smaller opening and closing mean velocities. However, their mandibular movement had the same degree of symmetry as the control group. Also, the pattern of condylar roto-translational components during mouth opening and closing was very similar between the healthy and TMD groups, with ne...
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...
A new method for assessing the temporomandibular joint quantitatively by dental scan
Journal of Cranio-Maxillofacial Surgery, 1996
The objective of this study was to assess the applicability of a multiplanar reformatting program (dental scan) for delineation and quantitative evaluation of the temporomandibular joint (TMJ) in the sagittal and coronal planes using the data of axial computed tomography. The resulting images were compared with standardized linear tomograms and direct sagittal and frontal computed tomography. Standardized linear tomograms and computed tomography of the TMJ in axial, frontal and sagittal planes were obtained in 11 patients. The axial computed tomography slices were then reconstructed in oblique frontal and sagittal planes according to the horizontal condylar angle of the TMJ by dental scan software. For each patient and each of the three imaging methods, 14 measurements were undertaken and 24 qualitative characterizations were assessed.
Iranian Rehabilitation Journal
Objectives: A sonographic approach can be used to quantify joint movement, muscle thickness, and available joint space. This study aimed to compare the amount of mouth opening, joint articular distance, and both anterior and inferior translation of the mandibular condyle between healthy participants and individuals with temporomandibular joint (TMJ) disorders. Methods: A cross-sectional study design was used with 52 participants (control: 26 healthy and TMJ: 26 symptomatic individuals) recruited using convenience sampling. The joint space distance and the anterior and inferior condylar translation on both sides were evaluated using sonography during maximum mouth opening and closing. Mouth opening was measured with a graduated ruler. Reliability was performed on a subgroup (n=10) with an interval of 3-7 days. Results: The reliability was good to excellent (ICC=0.57-0.94). The highest reliability was related to the joint space distance. The mean values for mouth opening were 43.1 and...
American Journal of Orthodontics and Dentofacial Orthopedics, 2011
Introduction: The purpose of this study was to investigate the condyle-fossa relationship, the position of the condyles in their respective mandibular fossae, and the dimensional and positional symmetries between the right and left condyles in a sample with normal occlusion. Methods: Thirty subjects from 15 to 32 years of age with normal occlusion had computed tomography scans of their temporomandibular joints. The images obtained from the axial slices were evaluated for possible asymmetries in size and position between the condylar processes. The images obtained from the sagittal slices were used to assess the depth of the mandibular fossa, the condyle-fossa relationship, and the centralization of the condyles in their respective mandibular fossae. Paired Student t tests were applied, and Pearson product moment correlations were determined after measurements on both sides were obtained. Results: The largest mediolateral diameter of the mandibular condylar processes (P 5 0.022) and the posterior joint spaces (P 5 0.048) showed statistically significant differences between the right and left sides. Statistically significant (P \0.05) anterior positioning of the condyles (noncentralized position) was observed. Conclusions: No singular characteristic in the temporomandibular joints of the normal occlusion group was verified. The largest mediolateral diameter of the mandibular condylar processes and the posterior joint spaces showed statistically significant differences between the right and left sides. Evaluation of the position of the condyles in their respective mandibular fossae showed noncentralized positioning for the right and left sides. (Am J Orthod Dentofacial Orthop 2011;140:18-24)