【摘要】 目的　评价楔状缺损 (简称楔缺 )治疗的远期疗效及其影响因素。方法　 75例 5 0 9颗楔缺牙分别用光固化复合体和光固化玻璃离子水门汀修复 ,于修复后 1、2及 4年用改良的USPHS系统评价其疗效。结果　楔缺修复后的临床成功率从 2年时的 85 5 %下降为 4年时的 2 7 7% ,并发现1 8% (修复后 2年 )和 6 6 % (修复后 4年 )的患牙原楔缺修复体颈缘下方出现的新“楔状缺损”。疗效受多种因素影响 ,有咬合因素患牙组的临床失败率明显高于无咬合因素组。结论　楔缺修复治疗的临床成功率受患牙承担咬合力的大小和修复材料物理性能的影响 ,提示在楔缺的治疗中 ,除了材料的选择外必须考虑患牙咬合因素的祛除更多还原

【Abstract】 Objective To evaluate the long term curative effect clinically and analysis of its influence factors after restoration of teeth with wedge shaped defects Methods Seventy five cases of 509 teeth with various degrees of dental wedge shaped defects were randomly divided into two groups the group restored by Dyract Cement and the group restored by 3M Vitremer. Evaluation was made with the modified USPHS evaluation criterion after restoration for 1?2?4 years respectively Results The successful rate dropped down from 2 year successful rate 85 5% to 4 year 27 7%. The new wedge shaped defects were presented at the cervical margin of the original restoration in 1 8% (2 years later) and 6 6% (4 years later) There were a lot of influence factors on long term curative effect The failure rate in the group with occlusal interference was significantly higher than that without occlusall interference Conclusions The clinical successful rates are affected by the value of occlusal force on the restored teeth and the physical properties of the restorative materials It is suggested that the process of restoration of dental wedge shaped defect should include obviating occlusal factors as well as to improve the properties of restorative materials更多还原