种植固定义齿水平型食物嵌塞的临床防治探讨

Clinical Treatment of Horizontal Food Impaction for Implant Supported Fixed Dentures

目的观察种植冠邻面部分以改良形态修复后治疗水平型食物嵌塞的效果。方法随机抽取120例后牙种植冠,分成3组:A组为正常牙冠形态组,B组为改良牙冠形态组,C组为改良牙冠形态和邻牙形态改善组。两两对比并进行随访观察。B、C组在修复上给予优惠并在1年后拆除按A组修复。结果 A,B,C组水平型食物嵌塞率分别为57.5%,25.5%,17.5%;B、C组食物嵌塞率与A组比较,差别有统计学意义(P<0.05);B组与C组之间的食物嵌塞率比较,差别无统计学意义(P>0.05)。结论调整种植体冠邻面部分形态有利于防止水平型食物嵌塞。

Objective This experiment was aimed at observing the effect of treating the horizontal food impaction through repairing the adjacent portion of the implant crown in different forms. Method 120 cases of teeth with posterior implant crowns were equally divided into three groups, namely group A, group B and group C. Group A consisted of teeth with the normal crown shape, group B with the modi fied crown shape while group C with the modified crown shape and the improved adjacent teeth form. The pairwise comparisons between each group were observed. The experimental groups B and C were given preferential treatment in repair. After the crowns were dismantled a year later, all three groups were treated with an identical repair procedure. Result The food impaction rates were 57.5 ~, 25.5 ~, 17.5%0 for group A, B and C, respectively. While the food impaction rates of group B and group C were significantly different from that of group A （P〈0.05）, no difference between group B and group C was observed （P）0.05）. Conclusion Readjusting the implant crown shape and adjacency relation is benefi- cial for the prevention of the horizontal food impaction.