Marginal fidelity and microleakage of porcelain veneers made by two techniques.
Marginal fidelity and microleakage of porcelain veneers made by two techniques.
复制标题
两种技术制作的瓷贴面的边缘保真度和微渗漏。
DOI：
10.1016/0022-3913(92)90040-h
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Materdomini,D
中科院分区：
文献类型：
--
作者：
Sorensen,JA;Strutz,JM;Avera,SP;Materdomini,D
本研究评估了采用铂箔和耐火模具技术制成的瓷贴面的边缘保真度和微渗漏。上颌切牙与牙釉质的大小和数量相匹配，通过 0.5 毫米的均匀牙釉质内缩小来制备。对间接制成的单板进行蚀刻、硅烷处理并用复合树脂粘合，并对边缘进行精加工和抛光。将修复后的牙齿保存在37℃水中，热循环1000次，用硝酸银染色，包埋，颊舌侧和近远中切片，并在X250放大倍数下测量。与耐火模具贴面相比，铂箔贴面具有明显更好的垂直边缘保真度，但过度轮廓明显更多。在牙齿-复合树脂界面处观察到普遍的微渗漏，在瓷-复合树脂界面处观察到可忽略不计的微渗漏。未发现垂直边缘开口量与微渗漏量之间存在关系。
This study evaluated the marginal fidelity and microleakage of porcelain veneers made with the platinum foil and refractory die techniques. Maxillary incisors, matched for size and amount of enamel, were prepared with 0.5 mm uniform intraenamel reduction. The indirectly made veneers were etched, treated with silane, and luted with a composite resin, and the margins were finished and polished. The restored teeth were stored in 37 °C water, thermocycled 1000 times, stained with silver nitrate, embedded, sectioned buccolingually and mesiodistally, and measured at X250 magnification. The platinum foil veneers had significantly better vertical marginal fidelity but significantly more overcontouring than had the refractory die veneers. Universal microleakage at the tooth-composite resin interface and negligible microleakage at the porcelain-composite resin interface were observed. No relationship was found between the amount of vertical marginal opening and the amount of microleakage.