Pene J R, Nicholls J I, Harrington G W
Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle 98195-7448, USA.
J Endod. 2001 Jan;27(1):18-22. doi: 10.1097/00004770-200101000-00006.
The purpose of this study was to evaluate the use of fiber-composite laminate, a reinforcement ribbon embedded throughout a composite restoration, to reinforce immature maxillary central incisors. Twenty-six mature maxillary central incisors were prepared a minimum of 3 mm below the facial cementoenamel junction to simulate immature nonvital teeth. They were separated into 3 groups: group 1 was unfilled and served as a control; group 2 was filled to the depth of the preparation with composite; and group 3 was filled with composite and Connect Reinforcement Ribbon. The specimens were subjected to class I loading in an Instron Testing Machine until catastrophic failure occurred. The results indicate a highly significant difference between the groups (p < or = 0.003). Group 1 fractured at an average load of 31.08 kg, group 2 at 51.00 kg, and group 3 at 37.93 kg. These findings suggest that composite alone increases fracture resistance of the immature tooth model more than composite with Reinforcement Ribbon.
本研究的目的是评估纤维复合层压板（一种贯穿复合修复体嵌入的增强带）用于增强未成熟上颌中切牙的效果。选取26颗成熟的上颌中切牙，在唇侧牙骨质釉质界下方至少3毫米处进行预备，以模拟未成熟的无活力牙齿。将它们分为3组：第1组未填充，作为对照组；第2组用复合材料填充至预备深度；第3组用复合材料和Connect增强带填充。在英斯特朗试验机上对样本施加I类载荷，直至发生灾难性破坏。结果表明各组之间存在高度显著差异（p≤0.003）。第1组在平均载荷31.08千克时断裂，第2组在51.00千克时断裂，第3组在37.93千克时断裂。这些发现表明，单独使用复合材料比使用带增强带的复合材料更能提高未成熟牙齿模型的抗折性。
