应用CEREC3 CAD/CAM对上颌隐裂磨牙牙尖斜度的研究  

A measurement of cracked teeth on the maxillary first molar cusp inclination by using CEREC3 CAD/CAM

作　　者：饶小波[1] 王文梅[1] 俞青[1] 陈渊华[1] 

机构地区：[1]南京大学口腔医学院口腔内科,江苏南京210008

出　　处：《临床口腔医学杂志》2011年第2期76-79,共4页Journal of Clinical Stomatology

基　　金：江苏省卫生厅课题(H200748)

摘　　要：目的:通过隐裂磨牙牙尖斜度的测量,从牙体解剖结构上探讨磨牙隐裂的病因。方法:选取隐裂组、对照组磨牙模型,应用CEREC3 CAD/CAM测量出各自的牙尖高度、牙尖斜嵴的长度及牙尖之间的距离,利用三角函数计算出牙尖斜度及近中颊舌斜面夹角、远中颊舌斜面夹角。结果:在近中颊尖斜度、近中舌尖斜度、远中颊尖斜度、远中舌尖斜度方面隐裂组比对照组大;在近中颊舌斜面夹角、远中颊舌斜面夹角大小方面隐裂组比对照组小,经成组t检验,有显著差异(P<0.05)。结论:牙体解剖学因素与牙隐裂发病关系密切,牙尖斜度的大小是磨牙隐裂重要病因之一,牙尖斜度越大,牙尖斜面夹角越小,隐裂发生的可能性越大。Objective：To study the anatmnical etiology of the cracked molars by measuring cuspal inclination of the cracked molars.Method：Measuring cuspal height,cuspal oblique ridge length and the distance between the cusp of cracked teeth group and control group by using CEREC3 CAD/CAM and calculating the inclination of the cusp,the mesial buccal-lingual inclined angle and the distal buccal-lingual inclined angle.Result：Significant differences are found between cracked teeth group and control group in the mesial buccal-lingual inclined angle and the distal buccal-lingual inclined angle（P0.05）.Conclusion：It suggests that the factors of dental anatomy are closely related with the incidence of cracked teeth.The bigger the inclination and the smaller cuspal inclined angle,the greater possibility occurs cracked teeth.

关 键 词：隐裂牙 牙尖斜度 牙尖斜面夹角 

分 类 号：R783.2[医药卫生—口腔医学]