中国实用口腔科杂志2026，Vol.19Issue(4)：440-445,6.DOI:10.19538/j.kq.2026.04.009
基于锥形束CT的骨性Ⅱ类下颌偏斜成年患者髁突形态和横向(牙合)平面特征研究
Cone beam CT evaluation of condylar morphology and frontal occlusal plane in adult skeletal Class Ⅱ patients with mandibular deviation
摘要
Abstract
Objective To explore the condylar morphology and its association with frontal occlusal plane characteristics in adult skeletal Class Ⅱ patients with mandibular deviation using cone beam CT(CBCT),aiming to provide references for clinical diagnosis and treatment.Methods Sixty patients(40 in the deviation group:menton deviation＞2 mm;20 in the symmetric group:menton deviation ≤ 2 mm)were enrolled,who were treated in the Department of Stomatology,Gener-al Hospital of Northern Theater Command,PLA,from January 2022 to August 2024.Pre-treatment CBCT data were ob-tained and input into Mimics Research 21.0 software for 3D reconstruction,the condyle was separated and reconstructed,and the condylar volume and surface area were measured.Vertical distances from bilateral maxillary canine/molar cusps to the Frankfort horizontal plane were recorded,with absolute differences defined as OC3(maxillary ca-nine)and OC6(maxillary molar)deviation.The side with the smaller distance was the deviated occlusal plane.The relationship between frontal occlusal plane deviation and menton deviation was analyzed.Results There were no statistically significant differences in condylar volume or con-dylar surface area between the bilateral sides in the symmetric group(P＞0.05).The mean values of the left and right sides were calculated and then compared with those of the deviation group.In the deviation group,the condylar vol-ume[(1 460.44±425.70)mm3]and condylar surface area[(763.32±158.28)mm2]on the deviated side were smaller than those on the non-deviated side[(1 641.95±395.70)mm3,(839.47±143.83)mm2](t=6.106,6.686;P＜0.05),with statistically significant differences.The condylar volume and surface area of the deviated side in the deviation group were lower than those in the symmetric group[(1 682.88±305.96)mm3,(852.61±116.39)mm2](t=2.080,2.235;P＜0.05),and the differences were statistically significant.No significant differences were found in condylar volume or con-dylar surface area between the non-deviated side of the deviation group and the symmetric group(P＞0.05).OC3 and OC6 in the deviation group[(1.45±0.50)mm,(1.48±0.68)mm]were higher than those of the symmetric group[(0.41±0.23)mm,(0.69±0.39)mm](t=8.819,4.803;P＜0.001).Both OC3 and OC6 were positively correlated with menton deviation(r=0.773,0.704;P＜0.001),and the occlusal plane deviation direction was associated with the menton devia-tion direction(P＜0.001).Conclusion Compared with adult patients with skeletal Class Ⅱ and mandibular symme-try,adult patients with skeletal Class Ⅱ mandibular asymmetry present smaller condyles on the deviated side and a larg-er frontal occlusal plane canting.Moreover,frontal occlusal plane canting may be correlated with menton deviation.关键词
下颌偏斜/骨性Ⅱ类/髁突形态/横向(牙合)平面Key words
mandibular deviation/skeletal Class Ⅱ/condylar morphology/frontal occlusal plane分类
医药卫生引用本文复制引用
符冬格,张晓东,王贺靓,何涔,马跃,孟令凯,孟怡彤..基于锥形束CT的骨性Ⅱ类下颌偏斜成年患者髁突形态和横向(牙合)平面特征研究[J].中国实用口腔科杂志,2026,19(4):440-445,6.基金项目
辽宁省科技计划联合计划项目(2024JH2/102600287) （2024JH2/102600287）
