Effect of H3PO4 concentration on bond strength.
Effect of H3PO4 concentration on bond strength.
复制标题
H3PO4 浓度对粘合强度的影响。
作者：
Wei Nan Wang;Ching Lin Yeh;Ber Duen Fang;Kuo Ting Sun;M. Arvystas
在粘接之前，通常使用37%-50%磷酸溶液（H3PO4）蚀刻牙齿的牙釉质表面60秒。本研究的目的是评价不同浓度的H3PO4溶液在2% ~ 80%范围内作用15秒后的拉伸结合强度、脱粘界面分布和牙釉质表面脱离情况。在不同的测试浓度之间，发现了统计上显著的差异：10%到60%范围内的浓度比较弱和较强的浓度产生更大的结合强度。粘接强度越弱，树脂与牙釉质的脱粘界面越大。粘结强度越大，支架与树脂之间的脱粘界面越大。H3PO4浓度超过30%后出现牙釉质脱离。为了获得更大的粘接强度和更少的牙釉质脱落，建议使用10%-30%浓度的磷酸蚀刻15秒进行临床粘接。
Prior to bonding, the enamel surface of the tooth is normally etched using a solution of 37%-50% phosphoric acid (H3PO4) for 60 seconds. The purpose of this study was to evaluate the tensile bond strength, debonding interface distribution and enamel surface detachment of various concentrations of H3PO4 solution, from 2% to 80%, applied for 15 seconds. Statistically significant differences in bond strength were found among the various concentrations tested: concentrations in the 10% to 60% range produced greater bond strengths than both the weaker and stronger concentrations. The weaker the bond strength, the greater the debonding interface between resin and enamel. The greater the bond strength, the greater the debonding interface between the bracket and resin. Enamel detachment occurred as the H3PO4 concentration rose above 30%. To obtain greater bond strength and less enamel detachment, 10%-30% concentrations of phosphoric acid for 15 seconds etching are suggested for clinical bonding.