Regional bond strengths of resins to human root dentine.
Regional bond strengths of resins to human root dentine.
复制标题
树脂与人根牙本质的区域粘合强度。
DOI：
10.1016/0300-5712(95)00102-6
复制
发表时间：
1996
影响因子：
4.4
通讯作者：
Pashley,DH
中科院分区：
文献类型：
--
作者：
Yoshiyama,M;Carvalho,RM;Sano,H;Horner,JA;Brewer,PD;Pashley,DH
目的近年来，对根面牙本质缺损如宫颈糜烂、根面龋等的修复需求显著增加，但有关根面牙本质粘接树脂的性能研究却很少。本研究的目的是测量复合材料与人根、冠牙本质粘结的局部拉伸粘结强度（TBS），并通过扫描电镜观察树脂与根牙本质的界面。从唇侧牙齿表面去除牙釉质和牙骨质，以在同一牙齿内从中冠到牙根尖的牙本质中形成长的腔制备。将所有粘合剂2（全蚀刻技术）或Imperva粘合剂（无蚀刻）粘合到牙本质表面，并用保护衬垫树脂复合材料覆盖。树脂粘结的牙齿被连续切成16个部分，在直角的牙齿的长轴，和粘结面被修剪，得到一个粘结表面积为1 mm2的TBS testing.ResultsAll债券2粘结强度冠状和根尖牙本质显示高的值（23.5 MPa），但粘结强度显着较低的颈根牙本质。Imperva Bond对所有区域产生了相对较高的拉伸粘合强度。扫描电镜显示All Bond 2在根面牙本质中形成的树脂渗透层厚度小于冠面。Imperva Bond的树脂渗透始终小于0.5 μm。结果表明，高TBS值可以获得最小的树脂渗透在根牙本质。
ObjectivesThe demand for restoration of root dentine defects such as cervical erosion and root caries has significantly increased recently, but there is limited information on the performance of the adhesive resins to radicular dentine. The purpose of this study was to measure the regional tensile bond strength (TBS) of composite bonded to human root and coronal dentine, and to observe the interface between resin and root dentine by SEM.MethodsHuman extracted cuspid teeth were used to measure TBS with a new microtensile bond test. Enamel and cementum were removed from the labial tooth surfaces to form a long cavity preparation into dentine from the mid-crown to the apex of the root within the same tooth. All Bond 2 (all etch technique) or Imperva Bond (no etch) was bonded to dentine surfaces and covered with Protect Liner resin composite. The resin-bonded teeth were serially sliced into 16 sections at right angles to the long axis of the tooth, and the bonded surfaces were trimmed to give a bonded surface area of 1 mm2for TBS testing.ResultsAll Bond 2 bond strengths to coronal and apical dentine showed high values (23.5 MPa) but the bond strength was significantly lower on cervical root dentine. Imperva Bond produced a relatively high tensile bond strength to all regional areas. SEM showed that the thickness of the resin-infiltrated layer formed by All Bond 2 in root dentine was less than coronal areas. Resin infiltration with Imperva Bond was always less than 0.5 μm. The results suggest that high TBS values can be obtained with minimal resin infiltration in root dentine.