Application of Adhesive Low Viscosity Composites for indirect Restorations

嵌体修复在临时修复期间对牙髓的保护有一个固有的缺陷。密封泄漏可能会导致空洞受到细菌污染，可能导致牙髓损伤。Liner Bond系统在牙本质表面用粘结树脂和低粘度复合材料(LVC)产生紧密的密封膜方面是独一无二的。它使我们能够在准备好后立即覆盖准备好的表面，以最大限度地减少印模采集、临时修复和最终粘结过程中机械、热和细菌侮辱对牙髓的进一步刺激。本研究旨在探讨粘接剂LVCs作为牙本质-牙髓保护剂对间接修复体的保护作用，包括四部分。LVC衬里完全消除了边缘渗漏，即使在II类复合树脂嵌体修复的颈部边缘也是如此。(2)研究了5种临时充填材料对粘接复合体与LVC粘附性的影响。Cavit-G是一种水硬性材料，显著提高了粘接强度。丁香酚和非丁香酚材料对粘附力无影响。一种以树脂为基础的材料，硬脂胶，粘在衬里表面，严重损害了粘合力。LVC与5种临时充填材料接触后表面形态发生改变，表面硬度降低，提示衬里与临时充填材料之间存在相互作用。(3)评价CR嵌体植入釉质、全蚀刻蚀和粘结剂LVC衬里的恒河猴牙髓的反应。LVC衬里的牙髓反应最小。(4)一项临床研究显示，瓷嵌体植入LVC衬里的洞洞中，术后无敏感性。本研究结果表明，LVC间接修复体粘结剂衬里是一种有效的牙髓修复技术。

Inlay Restoration has an inherent drawback in pulp protection during temporary restoration. Leaky sealing might result in bacterial contamination of the cavity, possibly leading to pulp damage. Liner Bond System is unique in producing tight sealing film on the dentin surface with an adhesive resin and a low viscosity composite (LVC). It enable us to cover prepared surface immediately after preparation to minimize further pulp irritation from mechanical, thermal, and bacterial insults during impression taking, temporary restoration, and final cementation. This study was designed to investigate the effect of adhesive LVCs as a dentin-pulp protector for indirect restorations, comprising four parts. (1) Tensile bond strength of CR lnlay Cement (Kuraray) to bovine dentin with LVC lining (127.5kg/cm^2) was significantly greater than that without lining (88.7kg/cm^2). LVC lining eliminated marginal leakage completely even at the cervical margin of Class II composite resin inlay restorations. (2) The effect of five temporary filling materials on the adhesion of a luting composite to the LVC was investigated. Cavit-G, a water hardening material, significantly increased bond strength. Eugenol and non-eugenol materials did not affected the adhesion. A resin based material, Duraseal, sticked on the liner surface and significantly impaired the bonding. The LVC surface in contact with five temporary filling materials showed morphological alteration and decrease of surface hardness, which suggest interacion between the liner and temporary filling materials. (3) Monkey pulpal responses to CR inlays placed enameletched, totally-etched, and adhesive LVC lined cavities were evaluated. LVC lining showed the least pulpal response. (4) A clinical study of porcelain inlays placed in LVC lined cavities revealed no post-operative sensitivity. The results of the present studies indicated that the adhesive LVC lining for indirect restorations was on effective technique for pulp