Yap A U J, Shah K C, Loh E T, Sim S S, Tan C C
Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Republic of Singapore.
Oper Dent. 2002 Mar-Apr;27(2):142-6.
This study investigated the influence of zinc-oxide eugenol (ZOE) temporary restorations on microleakage in composite restorations. Class V cavities were prepared on the buccal surfaces of 32 freshly extracted, non-carious human premolars. The teeth were randomly divided into four groups of eight teeth. Specimens in Group 1 (control) received no temporary restoration. Group 2 and 3 specimens were covered with IRM (Type III ZOE cement) mixed at powder:liquid (P:L) ratio of 10g:1g and 10g:2g, respectively. Specimens in Group 4 were covered with poly-carboxylate cement (eugenol-free) mixed at a P:L ratio of 2.85g:1g. The temporary restorations were removed mechanically with an ultrasonic scaler after one week storage in distilled water at 37 degrees C. The preparations were washed and restored with Scotchbond Multi-Purpose Plus and Z100 according to manufacturers' instructions. The restorations were finished, thermally stressed for 400 cycles and subjected to dye penetration testing. Results were analyzed using Kruskal-Wallis and Mann-Whitney tests at a significance level of 0.05. At both enamel and dentin margins, the microleakage associated with Group 3 was significantly greater than for Groups 1, 2 and 4. For Groups 1 and 4, leakage at the dentin margins was significantly greater than in enamel margins. For the groups pretreated with IRM, no significant difference in dye penetration scores was observed between enamel and dentin. Pre-treatment with IRM mixed at a P:L ratio of 10g:2g significantly increased microleakage and is not recommended clinically.
本研究调查了氧化锌丁香酚（ZOE）临时修复体对复合树脂修复体微渗漏的影响。在32颗新鲜拔除的无龋人类前磨牙的颊面制备V类洞。将牙齿随机分为四组，每组8颗牙。第1组（对照组）的标本未进行临时修复。第2组和第3组的标本分别用粉末与液体（P:L）比例为10g:1g和10g:2g混合的IRM（III型ZOE水门汀）覆盖。第4组的标本用P:L比例为2.85g:1g混合的聚羧酸锌水门汀（不含丁香酚）覆盖。在37℃蒸馏水中储存一周后，用超声洁牙机机械去除临时修复体。按照制造商的说明，对制备的牙齿进行清洗，并用Scotchbond Multi-Purpose Plus和Z100进行修复。对修复体进行修整，进行400次热循环，并进行染料渗透测试。使用Kruskal-Wallis检验和Mann-Whitney检验在显著性水平为0.05下分析结果。在釉质和牙本质边缘，与第3组相关的微渗漏显著大于第1组、第2组和第4组。对于第1组和第4组，牙本质边缘的渗漏显著大于釉质边缘。对于用IRM预处理的组，在釉质和牙本质之间未观察到染料渗透评分的显著差异。用P:L比例为10g:2g混合的IRM预处理显著增加了微渗漏，临床上不推荐使用。
