Abstract：
This study evaluated bond strength of glass fiber posts to root dentin using push-out (PO) and diametral compression (DC), testing glycolic acid as a conditioner and varying dentin moisture. An additional aim was to test whether DC can be an alternative test to PO for bond strength assessment. Eighty bovine teeth were divided into eight groups (n = 10) defined by the use of either 37% glycolic acid or 37% phosphoric acid (PA) on moist or wet dentin before bonding with either Adapter SingleBond/RelyX ARC or One Step Plus/Duo-Link Bisco. Each tooth provided discs with an internal diameter of 2 mm, external diameter of 5 mm, and height of 2 mm, which underwent PO and DC. Finite element analysis (FEA) was carried out on 3D models. When analyzing PO results through linear regression, the highest values of bond strength were observed using glycolic acid on wet dentin in the cervical and middle thirds of the teeth. Analyzing DC results, the only statistical influence on values was the dental thirds. The scatterplot of the DC results and the PO bond strength values indicated no relationship between the results of the two tests (r = 0.03; p = 0.64). PO test detected more sensitive changes in bond strength values than DC.
摘要：
这项研究使用推出（PO）和径向压缩（DC）评估了玻璃纤维桩与牙根牙本质的粘结强度，测试乙醇酸作为调理剂和不同的牙本质水分。另一个目的是测试DC是否可以替代PO进行粘合强度评估。将80颗牛齿分为八组（n=10），其定义是在潮湿或潮湿的牙本质上使用37％的乙醇酸或37％的磷酸（PA），然后与AdapterSingleBond/RelyXARC或OneStepPlus/Duo-LinkBisco粘合。每个齿提供内径为2毫米的圆盘，外径5毫米，和2毫米的高度，经历了PO和DC。对三维模型进行了有限元分析。通过线性回归分析PO结果时，在宫颈和牙齿的三分之二的湿牙本质上使用乙醇酸观察到最高的粘结强度值。分析直流结果，对值的唯一统计影响是牙齿三分之一。DC结果和PO键强度值的散点图表明两个测试的结果之间没有关系(r=0.03;p=0.64)。PO测试检测到比DC更敏感的粘结强度值变化。
