【摘要】 目的:观察治疗楔状缺损两种材料修复体的质量和寿命。方法:75例509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、4及8年用改良的USPHS系统评价修复体的质量,评为劣的修复体重做修复计算寿命。结果:光固化复合体和光固化玻璃离子水门汀修复体寿命超过4年的仅有28.6%和26.3%,达到8年的只有3.7%和3.5%,两种材料修复体的优良率均随复查时间的加长急剧下降。玻璃离子组脱落率低于复合体组,差异有显著性。结论:治疗楔状缺损的光固化复合体和光固化玻璃离子水门汀修复体超过2年后质量下降快,寿命短。更多还原

【Abstract】 Objective:To evaluation the longevity and quality of two kinds of restorative materials used in wedge-shaped. Method:Seventy five cases with various degrees of dental wedge-shaped defects of 509 teeth were randomly divided into two groups,the group restored by Dyract Cement and the group restored by 3M-Vitremer. Evaluation was made in the modified USPHS system after restoration for 1、2、4 and 8 years respectively. The longevity of restorations that need replacement due to failure would be recorded over again. Results:For wedge-shaped defects restorations about 28.6 percent of the Dyract Cement restorations and about 26.3 percent of 3M-Vitremer remained functional after 4 years,and only respectively about 3.7 percent and 3.5 percent of those after 8 years. The successful-rate of two kinds of materials dropped down rapidly following the longitudinal study. The restorations of 3M-Vitremer last significantly longer than that of Dyract Cement.Conclusion:The longevity and quality of the Dyract cement and glass ionomer cement restorations were reduced after two years.更多还原