[Condylar morphological changes before and after orthodontic treatment for angle Class I malocclusion adult patients].
OBJECTIVE
To evaluate the condylar morphological changes in adult Angle Class I malocclusionpatients before and after orthodontic treatment using a cone-beam CT (CBCT).


METHODS
Images of 25 adult Angle Class I patients (5 males, 20 females) who had no temporomandibular joint disorder symptom were involved in this study, and Mimics 10.01 software was used to reconstruct the three-dimensional condyle and measure the height of condyle, the area and bone density of the largest cross sectional plane and sagittal plane, and the volume and bone density of the whole and upper three-dimensional condyle before and after orthodontic treatment. Paired t test was used for comparison between pre- and post-treatment condylar metric analysis with SPSS 19.0 software package.


RESULTS
After treatment, the area and bone density of the largest cross sectional plane and sagittal plane were reduced significantly(P<0.05). The volume and bone density of the whole three-dimensional condyle and bone density of the upper three-dimensional condyle were reduced significantly(P<0.05).


CONCLUSIONS
Adaptive bone remodeling of the condyle may occur due to alternation of occlusion by orthodontic treatment in adult Angle Class I malocclusion patients.
School of Stomatology/Dental Clinic, Zhejiang Chinese Medical University. Hangzhou 310053, Zhejiang Province, China. E-mail:sqt_dent@163.com.
Qiu-Tao
QT
Shi
Hai-Ping
HP
Lu
Fang
F
Xiao
Zhen
Z
Jiang
Yi
Y
Liu
Zhi-Yuan
ZY
Gu
D000328:Adult; D016723:Bone Remodeling; D054893:Cone-Beam Computed Tomography; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008311:Malocclusion, Angle Class I / Q000628:therapy*; D008312:Malocclusion, Angle Class II; D008335:Mandibular Condyle / Q000033:anatomy & histology*; D013704:Temporomandibular Joint