三种树脂水门汀材料修复前牙漏斗状残根的效果比较  

Comparative study on three resin cements to restore anterior flared roots

作　　者：刘鹏[1] 谢秋菲[1] 

机构地区：[1]北京大学口腔医学院修复科,北京市100081

出　　处：《中国组织工程研究与临床康复》2010年第3期465-468,共4页Journal of Clinical Rehabilitative Tissue Engineering Research

摘　　要：背景:纤维桩在前牙美学修复中应用广泛,然而一些患牙严重缺损无法形成牙本质肩领或者根管粗大,导致纤维桩修复体脱落造成修复失败。目前新型的树脂水门汀多具有自粘结成分,对纤维桩的粘结效果较好,结合新型的树脂水门汀能否使纤维桩修复严重缺损的患牙还有待研究。目的:使用疲劳实验,剩余抗折强度测试,扫描电镜的方法,比较3种树脂水门汀结合玻璃纤维桩修复漏斗状残根的效果。方法:收集18颗离体上中切牙,根充后预备成相同规格的根管口敞开的漏斗状残根。将样本分为3组,分别用Rely X Unicem,Panavia F,Super-bond C&B树脂水门汀和相同的玻璃纤维桩进行修复。使用镍铬烤瓷冠修复所有样本,置于TCML咀嚼模拟实验机上,加载120万次循环力,并记录样本发生失败时的循环次数。对加载后仍未损坏的样本进行残余抗折强度测试,并使用扫描电镜观察3组样本的断裂界面。结果与结论:Super-Bond C&B组的平均循环载荷次数(120万次)显著高于Rely XUnicem组(64万次)和Panavia F组(55万次)(P<0.05),而Rely X Unicem和Panavia F组之间差异无显著性意义。Super-bond C&B组的残余抗折强度为747.99N,扫描电镜观察显示Super-bond C&B形成的树脂突更长,并且多于其他两组。提示Super-Bond C&B与预成玻璃纤维桩修复严重缺损的漏斗状根管效果较好。BACKGROUND：Fiber post is widely used in front teeth aesthetic repair,but some defect teeth cannot form ferrule or thick root canal,which resulted in fiber post prosthetic replacement defluxion and a failure of repair.Presently,new-style resin cement had self sticking component,showing good effects in sticking of fiber post.Whether combination of new-style resin cement can repair affected teeth using fiber post deserves further investigation.OBJECTIVE：Through fatigue test,residual flexural strength and scanning electron microscope（SEM） observation to compare the strength of severely weakened roots restored with three resin cements.METHODS：Eighteen intact maxillary central incisors were collected and formed to severely weakened canals at the same size.Three kinds of resin cements were used to restore.Rely X Unicem,Panavia F and Super-Bond CB resin cement and identical glass fiber post were used.All the specimens were restored using Ni-Cr ceramic crown,and placed on TCML chewing machine that loaded 1 200 000 cycle forces,and the cycle times when failure occurred were recorded.The samples were intact following loading received residual flexural strength test.SEM was employed to observe breakage surface of the samples.RESULTS AND CONCLUSION：Mean cyclic loading was significantly greater in the Super-Bond CB Group（1 200 000 times） than in the Relyx Unicem Group（640 000 times）and Panavia F Group（550 000 times）（P0.05）.No significant difference was detected between the Rely X Unicem and Panavia F Groups.Residual flexural strength was 747.99 N in the Super-Bond CB Group.SEM demonstrated that Super-Bond CB formed longer resin processes,which were more than other two groups.Results confirmed that Super-Bond CB demonstrated better results when restoring flared roots with prefabricated glass fiber posts.

关 键 词：漏斗状残根 树脂水门汀 玻璃纤维桩 疲劳实验 口腔修复材料 

分 类 号：R318[医药卫生—生物医学工程]