On the Relationship between Condylar Cortication and Mandibular Growth Activity

Abstract

Introduction: Mandibular growth prediction is central to orthodontics, yet little is known of the condylar bone density that accompanies this growth. Aims: To determine the bilateral symmetry of condylar cortical (CC), condylar trabecular (CT) and otic capsule (OC) grey values (GVs). To determine the relationship between condylar and OC GVs with age. To determine the relationship between three-dimensional mandibular growth and age. To determine the relationship between condylar cortication and mandibular growth activity. Methods: Mandibular growth rate was measured on CBCTs of orthodontically treated adolescents and young adults. OC, CC, and CT GVs were collected, and a bone density ratio calculated. Results: Significant differences exist in bilateral CC and OC GVs. CC, CT, and OC GVs significantly vary with age. Intercondylar width and mandibular growth rate significantly vary with age. Condylar cortication significantly predicts mandibular growth rate. Conclusions: A novel method to assess mandibular growth activity is introduced.