The effect of base/liner use on restoration leakage.
The effect of base/liner use on restoration leakage.
复制标题
底座/衬里的使用对修复体渗漏的影响。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Holman Bg
中科院分区：
文献类型：
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作者：
Von Fraunhofer Ja;M. Kr.;Holman Bg
修复体成功的关键是修复体的质量-牙本质界面密封性；密封性的任何损害都可能导致继发性或复发性腐烂。V类修复体有很高的渗漏倾向，本研究评估了基托/衬里放置对渗漏行为的影响。将V类半牙釉质/半牙本质预备材料(3.0×2.0×2.0 mm)切割成4组(n=10)人牙，每个洞预备用一个新的钻头。所有牙齿均为单根、单根管前牙。基座/衬垫的使用在每组之间有所不同。第一组牙齿没有衬里或基托，而第二组牙齿在条件调节和修复之前放置衬里。第三组放置基托，第四组同时放置基托和衬垫。制备完成后，将一根直径较小的聚氯乙烯绝缘铜丝从根尖插入每颗牙的根管内，与髓室顶板牢固接触。在0.9%的氯化钠溶液中，封闭牙-丝界面和根面，电化学追踪35天。所有的牙齿都有不同程度的渗漏；然而，没有衬里或基托的修复牙齿的渗漏量最小。在同时使用基托和衬垫修复的牙齿中，发现最大的渗漏；仅使用基托修复的牙齿比仅使用衬垫修复的牙齿显示更大的渗漏。结果表明，与仅经处理和修复的冠内V类制剂相比，基托和/或衬垫的存在会导致更大的渗漏。数据表明，同时放置基座和衬垫会显著增加修复体渗漏。
Central to the success of a restoration is the quality of the restoration-dentin interfacial seal; any compromise of the seal can lead to secondary or recurrent decay. Class V restorations have a high leakage propensity and this study evaluates the effect of base/liner placement on leakage behavior. Class V intracoronal half enamel/half dentin preparations (3.0 x 2.0 x 2.0 mm) were cut in four groups (n = 10) of extracted human teeth with a new bur used for each cavity preparation. All teeth were single-rooted, single-canal anterior teeth. Base/liner usage differed between each group. The first group of teeth had no liner or base, while a liner was placed in the second group of teeth prior to conditioning and restoration. A base was placed in the third group of cavity preparations and both the base and liner were placed in the fourth group. After preparation, a small diameter bare-end PVC-insulated copper wire was inserted within the root canal of each tooth from the apex to firm contact with the pulp chamber roof. The tooth-wire interface and root surface was sealed and leakage was followed electrochemically for 35 days in 0.9% NaCl solution. All of the teeth leaked to some degree; however, teeth that were restored without liner or base demonstrated the smallest amount of leakage. The greatest leakage was noted in teeth restored with both a base and a liner; teeth restored with only a base showed greater leakage than those restored with only a liner. The findings indicate that the presence of a base and/or a liner results in greater leakage compared with intracoronal Class V preparations that were conditioned and restored only. The data suggest that placing both a base and a liner increases restoration leakage significantly.