Radiographic Eevaluation of Gonial Angle Size and Its Correlation with Cortical Thickness and Height of Mandibular Residual Body

 Bone remodeling is a continuous and complex process and it seems that the morphologic changes in mandible is under the influence of age and dental status of the patient. The Gonial angle is a region of mandible that affects from these changes. The aim of this study is the evaluation of Gonial angle size and its correlation with cortical thickness and height of mandibular residual body in various dental status by means of panoramic radiography.

 In this cross sectional study 252 panoramic radiographs of patients who went to Sari Dental School Clinic were examined. Dental status of patients was recorded in the form of relevant information and the patients were categorized in three different groups: Dentate, Partially Dentate and Edentulous group. Panoramic measurement was performed by using software DFW v2.8. All the data were analyzed by software SPSS v16 and descriptive statistics and methods of inferential statistics (p value < 0.001).

 The mean size of gonial angle in dentate, partially dentate and edentulous was 119.92 ± 3.79, 123.48 ± 3.43 and 127.14 ± 5.20 degrees. The mean height of cortical thickness in dentate, partially dentate and edentulous was 3.52 ± 0.73, 3.12 ± 0.54 and 2.86 ± 0.71 mm. The mean height of mandibular residual body in dentate, partially dentate and edentulous was 25.62 ± 2.50, 19.95 ± 3.07 and 14.75 ± 4.67 mm.

 Gonial angle size has an inverse ratio with cortical thickness and height of residual mandibular body