成人下颌第三磨牙与下前牙拥挤的相关性研究  

Correlation relationship of third molar and mandibular incisor crowding in adult patients

作　　者：蔡思嘉[1] 易新[2] 张扬[1] 

机构地区：[1]中国医科大学口腔医学院正畸科,沈阳110002 [2]中国医科大学口腔医学院口腔解剖生理教研室,沈阳110002

出　　处：《口腔医学》2012年第1期33-35,共3页Stomatology

摘　　要：目的通过讲究成人下颌第三磨牙倾斜角及萌出间隙与下前牙不齐指数间的相关性,探讨下颌第三磨牙是否为导致下前牙拥挤的原因及下颌第三磨牙是否应在正畸治疗中拔除。方法选择成人骨性Ⅰ类下颌前牙区拥挤的患者34例,在治疗前的下颌记存模型上测量下前牙不齐指数,在曲面断层片上测量下颌第三磨牙倾斜角及萌出间隙,分析下颌第三磨牙与下前牙拥挤的相关性。结果下颌第三磨牙倾斜角及萌出间隙与下前牙不齐指数间无线性相关关系(P>0.05)。结论不能证明下颌第三磨牙是下前牙拥挤的主要原因,应尽量避免预防性拔除没有临床症状的第三磨牙。Objective To investigate the effects of third molar on mandibular incisor crowding and decide whether the third molar need removal during orthodontics treatment.Methods Models of 34 untreated adult subjects without skeletal malocclusion and with varying degrees of mandibular incisor crowding were studied.Incisor crowding was quantified by Little＇s irregularity.The third molar angulation and the eruption space were measured on panoramic radiographs.The linear correlation was applied in the statistic analysis. Results There was no linear correlation of mandibular incisor crowding and third molar（P0.05）.Conclusions Third molar is not the main reason for mandibular incisor crowding.The prophylactic removal of third molar with no clinical symptom should be avoided.

关 键 词：前牙拥挤 第三磨牙 线性相关 正畸治疗 

分 类 号：R783.5[医药卫生—口腔医学]