60例蒙古族青少年上颌前牙区牙厚度与骨骼面型的相关性分析  

Correlation Analysis between Thickness of Anterior Upper Teeth and Skeletal Relations in 60 Mongolian Teenagers

作　　者：张丽媛[1] 金武龙[1] 包雪梅[1] ZHANG Liyuan;JIN Wulong;BAO Xuemei(Department of Stomatology,Affiliated Hospital of Inner Mongolia Medical University.Hohhot 010050,China)

机构地区：[1]内蒙古医科大学附属医院口腔科,内蒙古呼和浩特010050

出　　处：《口腔医学研究》2021年第1期53-57,共5页Journal of Oral Science Research

基　　金：内蒙古自然科学基金(编号:2017MS0846);内蒙古医科大学青年创新基金(编号:YKD2016QNCX039)。

摘　　要：目的:应用高精度激光扫描技术获得牙列三维模型数据,测量分析呼和浩特地区蒙古族人群上颌前牙区牙厚度数据,观察牙厚度的变化特点,及其与骨骼型的相关性。方法:筛选2015年12月~2019年7月在内蒙古医科大学附属医院就诊的蒙古族青少年正畸患者60例,测量研究样本上前牙区牙冠厚度及变化规律,并研究牙冠厚度与头影测量指标的相关性。结果:上颌前牙在距切端3 mm处牙冠厚度变异最大,在距切端1 mm处厚度变异最小。其中侧切牙的厚度变异最大。在距切端3 mm处,上颌尖牙厚度变异较大,与中切牙、侧切牙相比差异具有统计学意义(P=0.00);在距牙合端2 mm处,上颌侧切牙厚度变异较大,与中切牙、尖牙相比差异具有统计学意义(P=0.00)。不同性别间比较,蒙古族男性牙冠厚度普遍大于女性,在U1T3、U2T3、U3T2、U3T3男性牙冠厚度大于女性具有统计学意义(P<0.05)。U2T2、U2T3、U3T3与∠SNA呈中度正相关关系;U2T3与∠SNB呈中度正相关关系;U1T3、U2T3、U3T2、U3T3和∠ANB呈中度正相关关系;U2T2、U2T3与MR升支角(∠MR-Copd)呈中度负相关关系。结论:上颌前牙区牙厚度变异较大,与骨骼面型具有相关性,对蒙古族青少年进行正畸治疗时,不同的颌骨关系,应考虑不同前牙牙冠厚度对上前牙转矩、覆牙合覆盖及咬合关系建立的影响,并作出适当矫治量的调整。Objective:To obtain the 3D dental model data by high precision laser scanning technique,and observe the variation of crown thickness,and its relationship to skeletal structure.Methods:60 Mongolian teenagers orthodontic patients were selected from Affiliated Hospital of Inner Mongolia Medical University between December 2015 to July 2019.The thickness of anterior teeth was measured,and the difference analysis of the measurements of the examinations was conducted,and the correlation of the thickness of upper anteriors with skeletal craniofacial pattern was evaluated.Results:The thickness of upper anterior teeth displayed the biggest difference 3mm to the occlusal surface,and the smallest variation 1mm to the occlusal surface.The thickness of maxillary lateral incisor displayed the biggest difference.The thickness of maxillary canine at 3mm to the occlusal surface was significant different to those of central incisor and lateral incisor(P=0.00).And the thickness at 2mm to the occlusal surface of maxillary lateral incisor was significant different to those of central incisor and canine(P=0.00).The thicknesses of male at U1T3,U2T3,U3T2,and U3T3 were statistically bigger than those of female.There was a moderate positive correlation between upper anterior teeth thickness of U3T3 and∠SNA,between U2T3 and∠SNB,between U1T3,U2T3,U3T2,U3T3 and∠ANB,and negative correlation between U2T2,U2T3 and∠MR-Copd.Conclusion:The thickness of maxillary anterior teeth varies greatly.When facing orthodontic treatment for Mongolian teenagers with different relationship between the jaws,the influence of anterior crown thickness on anterior torque,overjet,overbite,and establishment of occlusal relationship should be taken into account,therefore,the correctional quantity should be different.

关 键 词：上颌前牙区 牙冠厚度 青少年 数字化三维模型 颌骨关系 

分 类 号：R78[医药卫生—口腔医学]