70例不同垂直骨面型骨性Ⅱ类错牙合磨牙及基骨横向特征

doi:10.6040/j.issn.1671-7554.0.2020.1421

摘要/Abstract

摘要： 目的分析成人骨性Ⅱ类患者上下颌第一磨牙及基骨的横向特征,以及其与垂直骨面型的相关性。方法成人骨性Ⅱ类错牙合患者(ANB角≥5°)70例,其中男35例,女35例,年龄范围18~37岁,平均年龄25.26岁。按下颌平面角(∠FH-MP)将其分为低角组(∠FH-MP <22°,n=23)、均角组(∠FH-MP=22°~28°,n=24)和高角组(∠FH-MP>28°,n=23)。锥体束计算机断层扫描(CBCT)数据, Mimics21.0软件测量上下颌基骨宽度、上下颌第一磨牙牙间宽度、阻抗中心间宽度、磨牙倾斜度和阻抗中心水平牙槽骨厚度。使用单因素方差分析、LSD法、Pearson相关分析进行统计学分析。结果上下颌基骨宽度、上颌第一磨牙阻抗中心间宽度高角组低于均角和低角组(P<0.05);下颌平面角与上颌基骨宽度及上颌第一磨牙阻抗中心间宽度呈负相关(r=-0.279、-0.468);上下颌第一磨牙阻抗中心间宽度差高角组低于低角组(P<0.05)。上颌第一磨牙颊倾度、下颌第一磨牙舌倾度高角组高于低角组(P<0.05);下颌平面角与上颌第一磨牙颊舌向倾斜度呈正相关(r=0.422),与下颌第一磨牙颊舌向倾斜度呈负相关(r=-0.272)。上颌第一磨牙阻抗中心水平牙槽骨厚度高角组低于低角组(P<0.05);下颌高角组低于均角及组和低角组(P<0.05)。结论在成人骨性Ⅱ类患者中,高角型较均角及低角型上颌基骨宽度更小,上颌第一磨牙更加颊倾,下颌第一磨牙更加舌倾,上下颌第一磨牙阻抗中心水平牙槽骨更薄。

关键词: 骨性Ⅱ类, 垂直骨面型, 宽度, 锥体束计算机断层扫描, 相关性

Abstract: Objective To explore the transverse characteristics of basal bone and maxillary mandibular first molars in adult patients with skeletal class Ⅱ malocclusion, and to analyze the correlation between the characteristics and vertical facial types. Methods A total of 70 adult patients(35 males and 35 females, age 18-47 years, mean 25.26 years)with skeletal class Ⅱ malocclusion(∠ANB ≥ 5 °)were divided into three groups according to the mandibular plane angle(∠FH-MP): hypodivergent group(∠FH-MP<22°, n=23), normodivergent group(∠FH-MP=22°-28°, n=24)and hyperdivergent group(∠FH-MP>28°, n=23). Data were scanned with cone beam computed tomography(CBCT). The maxillomandibular basal bone width, intermolar widths, maxillomandibular intermolar width between centers of resistance, molar inclination, and thickness of alveolar bone were measured with Mimics21.0. Relevant factors were assessed with One-way ANOVA, LSD method and Pearson correlation analysis. Results The maxillomandibular basal bone width and intermolar width between centers of resistance of the upper first molars were shorter in the hyperdivergent group than in the other two groups(P<0.05). The mandibular plane angle was negatively correlated with the maxillary basal bone width and the intermolar width between centers of resistance of the upper first molars(r=0.279, -0.468). The width difference between centers of resistance of the upper and lower first molars in hyperdivergent group was smaller than that in hypodivergent group(P<0.05). The buccal inclination of upper first molar and the lingual inclination of lower first molar in hyperdivergent group were higher than those in hypodivergent group(P<0.05). The mandibular plane angle was positively correlated with the buccal-lingual inclination of the upper first molar(r=0.422), and negatively correlated with the buccal-lingual inclination of the lower first molar(r=-0.272). The buccolingual width at the alveolar crest of upper first molar at centers of resistance level in hyperdivergent group was lower than that in hypodivergent group(P<0.05), and that of the lower first molar in hyperdivergent group was lower than that in the other two groups(P<0.05). Conclusion Compared with the normodivergent and hypodivergent patients, skeletal class Ⅱ hyperdivergent patients have smaller width of the maxillary base, more buccal inclined upper first molar, more lingual inclined lower first molar, and thinner buccolingual width at the alveolar crest of upper and lower first molar at centers of resistance.

Key words: Skeletal class Ⅱ, Vertical facial type, Transverse, Cone beam computed tomography, Correlation

中图分类号:

R783.5

张嘉豪,刘东旭. 70例不同垂直骨面型骨性Ⅱ类错牙合磨牙及基骨横向特征[J]. 山东大学学报 (医学版), 2021, 59(2): 76-82.

ZHANG Jiahao, LIU Dongxu. Transverse characteristics of skeletal class Ⅱ malocclusion molars and basal bone in 70 cases with different vertical facial types[J]. Journal of Shandong University (Health Sciences), 2021, 59(2): 76-82.

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