四种充填材料根管充填术后磨牙抗折强度的对比  

A comparative study of fracture resistance of molars restored with different materials after conventional endodontic treatment

作　　者：杨宗范[1] 曾长余[1] 卓钺[2] 郭志远[1] 张波[3,4] 

机构地区：[1]国防科技大学医院口腔科,湖南长沙410073 [2]国防科技大学航天科学与材料工程学院,湖南长沙410073 [3]湖南师范大学临床医学院 [4]湖南省人民医院口腔颌面外科,湖南长沙410005

出　　处：《牙体牙髓牙周病学杂志》2015年第7期443-445,共3页Chinese Journal of Conservative Dentistry

摘　　要：目的:比较4种不同充填材料对根管充填术后磨牙抗折强度的影响。方法:选择牙体牙根完整的成人离体下颌第一、二磨牙80个,制备牙合面洞,常规根管预备、充填后随机分成4组(n=20),分别采用银汞合金(A组)、光固化复合树脂(B组)、银粉玻璃离子(C组)、玻璃离子(D组)进行充填,用万能试验机垂直加压至样本冠根纵折,记录最大抗压载荷。结果:A、B、C、D组最大抗压载荷(N)分别为1 126.15±291.66、1 682.90±368.69、1 614.55±424.09、1 818.75±439.54(P<0.05),两两比较,A组抗折强度明显小于B、C、D组(P<0.05),B、C、D组间比较P>0.05。结论:根管充填后磨牙修复,光固化复合树脂、银粉玻璃离子及玻璃离子材料抗折强度优于银汞合金。AIM： To compare the fracture resistance of molars restored with 4 different materials after conventional endodontic treatment. METHODS： 80 extracted molars were instrumented and then randomly divided into 4groups（ n = 20）. The teeth were then restored with silver amalgam（ group A）,light- cured composite resin（ group B）,glass ionomer silver reinforced restoration（ group C） and glass ionomer（ group D） respectively. All specimens were subjected to a vertical load to cause vertical crown and root fracture. The force required to fracture was measured. RESULTS： The mean fracture load values（ N） of group A,B,C and D were 1126. 15 ± 291. 66,1682. 90 ± 368. 69,1614. 55 ± 424. 09 and 1818. 75 ± 439. 54 respectively（ P〈0. 05）. Group A exhibited lower mean fracture load value than group B,C and D（ P〈0. 05）,but there was no significant difference among group B,C and D（ P〉0. 05）.CONCLUSION： The molars restored with light- cured composite resin,glass ionomer silver reinforced restoration or glass ionomer have higher fracture resistance than those restored with silver amalgam.

关 键 词：抗折强度 充填材料 牙折 根管充填术 后磨牙 

分 类 号：R783.1[医药卫生—口腔医学]