Three-dimensional evaluation of condylar morphology after orthodontic treatment in adult patients with Class II malocclusion by cone-beam computed tomography

• Published in: BMC oral health Vol. 24; no. 1; p. 48
• Main Authors: Shi, Qiutao, Gu, Zhiyuan, Lai, Danping, Dai, Qi, Yu, Fengyang
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 08-01-2024; BioMed Central; BMC
• Subjects: Adult; Bone and Bones; Bone Density; Bone mineral density; Bone remodeling; Bones; Care and treatment; Computed tomography; Cone-Beam Computed Tomography; CT imaging; Density; Dental Care; Dental occlusion; Diagnosis; Evaluation; Humans; Malocclusion; Malocclusion, Angle Class II - diagnostic imaging; Malocclusion, Angle Class II - therapy; Mandibular condyle; Morphology; Orthodontics; Temporomandibular joint disorders; China; United States > US; Cone-beam computed tomography; Mandibular condyle; Temporomandibular joint disorders
• ISSN: 1472-6831; 1472-6831
• DOI: 10.1186/s12903-023-03728-y

The aim of this study was to evaluate the condylar morphological changes after orthodontic treatment in adult patients with Class II malocclusion using a Cone-beam computed tomography (CBCT).
Images of twenty-eight adult patients with Class II malocclusion who have no temporomandibular symptoms were involved in this study. To analyze the post-treatment changes in condylar morphology, mimics 17.0 software was used to measure several values and reconstruct the three-dimensional condyle, including height of the condyle, area and bone mineral density of the maximum axial and sagittal section, volume and bone mineral density of the three-dimensional condyle and condylar head before and after orthodontic treatment. Using SPSS 19.0 software package Paired t-test was applied for comparison of condylar morphology analysis between pre-treatment and post-treatment.
Height of condylar head increase significant (P < .05). Bone mineral density showed a decrease in the maximum axial and sagittal section, three-dimensional condyle and condylar head (P < .01). Evaluation of volume revealed that volume of both condyle and condylar head decrease considerably (P < .05). No significant difference was detected in other values ((P > .05).
Condylar volume decreased and height of condylar head have changed, so we speculated that adaptive bone remodeling of the condyle occurs.