2种不同印模方法制取间接桩核的临床效果评价

目的比较硅橡胶印模法与琼脂/藻酸盐联合印模法制取铸造间接桩核的临床效果。方法将牙体大面积缺损、根管治疗后要求桩核冠修复的389颗牙随机分为A、B组，A组采用硅橡胶印模法制取间接桩核，B组采用琼脂/藻酸盐联合印模法制取间接桩核，对2种印模法制取间接桩核的效果进行评价。结果硅橡胶印模法制取间接桩核的临床成功率高于琼脂/藻酸盐联合印模法，二者之间差异具有统计学意义（P<0.05）。其中，2种不同印模方法制取前牙间接桩核的成功率之间差异无统计学意义（P>0.05），制取前磨牙和磨牙间接桩核的成功率之间差异有统计学意义（P<0.05）。结论采用硅橡胶印模法制取间接桩核的临床效果优于琼脂/藻酸盐联合印模法。

Clinical evaluation of indirect post core by two different impression methods

Objective To evaluate the clinical effect of indirect cast post core by two different impression methods between silicone rubber impression and agar/alginate combination impression. Methods 389 massive destruction teeth after root canal therapy were randomly divided into two groups（group A and group B）. The teeth of group A was treated by silicone rubber impression material for making indirect post core impression. The teeth of group B was treated by agar/alginate combination impression for making indirect post core impression. The effect of two different impression methods was evaluated. Results The success rate of making indirect post core impression by silicone rubber impression method was higher than that of making impression by agar/alginate combination impression method. Significant difference was found in making indirect post core impression between premolars and molars by two different impression methods（P <0.05）, while there was no significant difference in making indirect post core impression of anterior teeth by two different impression methods（P>0.05）. Conclusion The clinical effect of making indirect post core impression by silicone rubber impression method is better than that of making impression by agar/ alginate combination impression method.