Visco A M, Calabrese L, Campo N, Torrisi L, Oteri G, Lo Giudice G, Cicciù D
Industrial Chemistry and Material Engineering Department, Contrada Di Dio, Vill. S. Agata, I-98166 Messina, Italy.
Biomed Mater Eng. 2006;16(5):349-58.
In this work composite materials, based on quartz fibers and epoxy resins, were employed with the aim to restore damaged teeth. The composite materials were chosen because they show biomechanical features very similar to that of the dentine, the main constituent of the tooth. Extracted teeth were rebuilt with two different restorative procedures: in the first, the composite material was pre-formed in a conical trunk shape abutment (PA) and then bonded to a fiber quartz post with a dental bonder. In the second rebuilt system the abutment was prepared by cross linking the resin on the fiber quartz post with a halogen lamp (CRA). The restored teeth were then mechanically tested and observed with a Scanning Electron Microscope (SEM) with the aim to study the interaction between the reconstructive materials. Wetting and roughness measurements were also carried out in order to study the interface adhesion between the post and the abutments. Characterization analysis evidenced that the CRA restorative procedure improves the adhesion between the substitutive materials and shows higher fracture strength than the PA ones. Anyway both the rebuilt systems are able to support the masticator load. An explanation of the interfacial post-abutment interaction phenomenon is discussed.
在这项工作中，采用了基于石英纤维和环氧树脂的复合材料来修复受损牙齿。选择这些复合材料是因为它们表现出与牙齿的主要成分牙本质非常相似的生物力学特性。用两种不同的修复程序对拔除的牙齿进行重建：第一种方法是，将复合材料预先制成圆锥台形状的基台（PA），然后用牙科粘合剂将其粘结到纤维石英桩上。在第二种重建系统中，通过用卤素灯交联纤维石英桩上的树脂来制备基台（CRA）。然后对修复后的牙齿进行力学测试，并用扫描电子显微镜（SEM）观察，以研究重建材料之间的相互作用。还进行了润湿性和粗糙度测量，以研究桩与基台之间的界面附着力。表征分析表明，CRA修复程序提高了替代材料之间的附着力，并且比PA修复程序显示出更高的断裂强度。无论如何，两种重建系统都能够承受咀嚼负荷。文中讨论了界面桩-基台相互作用现象的一种解释。
