摘要
目的了解卡环固位力与基牙倒凹深度间的变化关系,为卡环设计获得最佳效果提供依据。方法采用Chatillon测力仪,测定临床常用钴铬合金铸造三臂卡,在前磨牙、磨牙的0.25mm、0.50mm、0.75mm三个倒凹深度上的固位力。结果倒凹深度越大,卡环固位力也越大;相同倒凹条件下,磨牙卡环的固位力比前磨牙卡环大。不同基牙、不同倒凹深度对于卡环固位力均存在显著影响。结论在材料弹性极限内,卡环固位力与进入基牙深度成正变关系。
Objective To study the relationship between the depth of undercut and the retention of clasp,as a basic information in clinic designing of clasp.Methods The Chatillon force measuring instrument was used to record the retention of18Co-Cr alloy casting Akers clasps when they were dislodging from undercuts of different depths(0.25mm,0.50mm,0.75mm)on bicuspid and molar.All the data was analyzed by ANOVA.Results It is showed that the deeper the undercuts the greater the retention is.The retention of the clasp on molar is greater than premolar in the same condition of undercut.The effect of the types of the abutment and the depths of the undercut are both obvious on the retention of clasp.Conclusions Within the elastic limit of the material,the retention of clasp and the depth of abutment undercut show a positive correlation.
出处
《上海口腔医学》
CAS
CSCD
2003年第1期27-29,共3页
Shanghai Journal of Stomatology
