Wendt S L
Department of Restorative Dentistry and Endodontology, University of Connecticut, Farmington.
Am J Dent. 1991 Feb;4(1):10-4.
The purpose of this study was to examine the microleakage and cusp fracture resistance of heat-treated composite resin inlays. One hundred and twenty extracted human bicuspid teeth were prepared with MOD Class II preparations and divided into 12 experimental groups. Ten extracted human teeth were kept sound as positive controls and 10 of the prepared teeth were left unrestored as negative controls for the cusp fracture resistance experiment. The remaining prepared teeth were grouped and restored with the following restorations: bulk or incremental placement, light-cured inlays, heat-treated inlays "cemented" with enamel bonding agent, enamel bonding agent/glass ionomer "sandwich", or a dentinal bonding agent. Heat-treated inlays showed significantly (P less than 0.05) less microleakage than all other groups. The cusp fracture resistance of the heat-treated inlays was in the same magnitude as that of the traditionally placed composite resin restoration. All restorations were significantly (P less than 0.05) lower in cusp fracture resistance than sound non-carious teeth.
本研究的目的是检测热处理复合树脂嵌体的微渗漏和牙尖抗折性。用近中邻面洞（MOD）Ⅱ类洞型预备方法对120颗拔除的人双尖牙进行预备，并将其分为12个试验组。保留10颗拔除的人牙作为阳性对照，在牙尖抗折性试验中，将10颗预备好的牙不做修复作为阴性对照。其余预备好的牙进行分组，并用以下修复体进行修复：整块或分层放置的光固化嵌体、用釉质粘结剂“粘结”的热处理嵌体、釉质粘结剂/玻璃离子“三明治”或牙本质粘结剂。热处理嵌体的微渗漏明显（P＜0.05）少于所有其他组。热处理嵌体的牙尖抗折性与传统放置的复合树脂修复体相当。所有修复体的牙尖抗折性均明显（P＜0.05）低于健康无龋牙。
