[1]李仲伟,贾 莹,周星宇,等.骨性Ⅲ类均角错牙合牙颌特征及其与下颌骨位置相关性分析[J].中国美容医学,2022,(8):146-150.
　LI Zhongwei,JIA Ying,ZHOU Xingyu,et al.Analysis of the Characteristics of the Teeth and Its Correlation with the Position of Mandible in Normal-angle Skeletal Class Malocclusion[J].Medical Aesthetics and Beauty,2022,(8):146-150.
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骨性Ⅲ类均角错牙合牙颌特征及其与下颌骨位置相关性分析()
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《中国美容医学》[ISSN:1008-6445/CN:61-1347/R]

卷:
期数:
2022年8期
页码:
146-150
栏目:
出版日期:
2022-08-10

文章信息/Info

Title:
Analysis of the Characteristics of the Teeth and Its Correlation with the Position of Mandible in Normal-angle Skeletal Class Malocclusion
文章编号:
1008-6455(2022)08-0146-05
作者:
李仲伟;  贾 莹;  周星宇;  杨 桦
(贵州医科大学 贵州 贵阳 550004 )
Author(s):
LI Zhongwei; JIA Ying; ZHOU Xingyu; YANG Hua
(Guizhou Medical University, Guiyang 550004, Guizhou, China)
关键词:
均角; 骨性Ⅲ类; 轴倾; 转矩; 下颌平面角; 矢状向; 垂直向
Keywords:
normal-angle;  skeletal Class malocclusion;  tip;  torque;  MP-FH;  saggital view;  coronal view
分类号:
R783.5
文献标志码:
A
摘要:
目的：了解均角骨性Ⅲ类牙齿生理性初始位全牙轴倾斜特征及其与下颌骨矢/垂直向位置的相关性。方法：收集均角 骨性Ⅰ类30例、Ⅲ类21例患者CBCT Dicom数据，导入Invivo 5.1 软件测量相关指标。结果：均角Ⅲ类和Ⅰ类同颌同名牙转 矩角和轴倾角一致性较好。Ⅲ类与Ⅰ类相比：①矢状向：上切牙段冠唇向、下切牙段冠舌向趋势增大，差异有统计学意义 （P＜0.05）；上下尖牙、后牙轴倾角比较，差异无统计学意义；②冠状向：上切牙近中倾斜趋势增加，下切牙较直立，仅 上颌侧切牙比较差异有统计学意义（P＜0.05）；上尖牙及后牙冠颊向、下尖牙及后牙冠舌向趋势增大，仅上前磨牙比较差 异有统计学意义（P＜0.05）；③均角Ⅲ类MP-FH值与L5、L6、L7转矩角正相关，且牙位越靠后相关性越强；④下前牙转矩值 与ANB值正相关。结论：①骨性Ⅲ类均角牙列初始位时，下前牙转矩随ANB角减小而舌倾趋势增加，下颌后牙随MP-FH增大而 呈颊倾趋势，上牙列与ANB角和MP-FH间无明显的相关性；②骨性Ⅲ类均角下牙列牙齿呈舌向倾斜，下牙列舌向安全代偿范围 相对减小。
Abstract:
Objective To analyze the characteristics of the initial whole teeth inclination and the correlation between the inclination and position of mandible in saggital and vertical direction. Methods Including the skeletal class I and Ⅲ malocclusion patients’dicom data of CBCT were 30 and 21 respectively with normal-angle were collected. Tip and torque of whole teeth were measured separately by the software Invivo5.1. Results The bilateral homonymous teeth inclination in same jaw had a good consistency in normal-angle skeletal Class I and Ⅲ .Compared the skeletal Class Ⅲ malocclusion with the Class I malocclusion: ①saggital view: the trend of crown labial torque increased in the upper incisors and decreased in the lower incisors, the diference was statistically significant(P ＜0.05).Tip of canines and posteriors in upper and lower jaw showed no statistically significant difference.②Coronal view: maxillary incisors and lateral incisors inclined mesially,and the madibular incisiors were upright,however the statistically significant difference were found only in laeral incisiors, the difference was statistically significant(P＜0.05).Crown torque of the upper canines and posteriors were buccally inclined and the lower were lingually inclined increasingly, only the maxillary premolars showed a significant difference.③A significantly postive correlation were noted between angle of MP-FH and the torque value of L5,L6 and L7.④A significantly postive correction were noted between the torque value of lower anteriors and value of ANB. Conclusion ①At the initial position: the anterior tooth torque increased with the increase of ANB Angle and the trend of lip inclination increased;The mandibular posterior teeth at the initial position showed buccal inclination with the increase of MP-FH. There was no signifi cant correlation between the inclination of upper dentition and ANB Angle and MP-FH.②The inferior dentition were lingually inclined in the normal-angle skeletal class Ⅲ malocclusion , so the safe lingual compensatory treatment range of its was relatively limited.

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更新日期/Last Update: 2022-08-29