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 in right and left side of temporomandibular joint. 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 150 children were used in present study. The cone beam images (Scans) were obtained from Carestream 9000cc (USA) CBCT machine at 90 Kvp,4 mA for 6.3 seconds at FOV 17x6 and voxel size of 200.The TMJ was definedon 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 non significant in males (P value>.05) and females (P value>.05) in both best fit line method and top roof line method. The co-relation between age groups and articular eminence inclination by Best fit line method (right side and left side) and by Top roof line method (right side and left side) was stastically significant (p value<.001). 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.
Keywords: Temporomandibular Joint; Best Fit Line Method; Top Roof Line Method; CBCT.
: Akhilanand Chaurasia, Assistant Professor, Department of Oral Medicine & Radiology, Faculty of Dental Sciences, King George’s Medical Unniversity, Lucknow, Uttar Pradesh 226003, India.