四种正畸粘接剂的粘接性能研究

A Study on Bond Strength of Four Orthodontic Adhesives

考察了两种非调和型、两种调和型正畸粘接剂在不同浸水时间、放置时间、酸蚀时间条件下的粘接抗张强度。结果表明：①４种粘接剂在３７℃、１００％ｒｈ环境中，５ｍｉｎ后的粘接强度均大于２５ＭＰａ，在３７℃水中浸泡１ｄ后的粘接强度均大于６ＭＰａ，两种非调和型粘接剂的粘接强度在１ｄ内随时间延长而增加；②在３７℃、１００％ｒｈ环境中，４种粘接剂的液剂先涂于牙面１～１０ｍｉｎ后再粘接，所得粘接强度无明显变化；③酸蚀牙釉质平滑面１５～６０ｓ，所得粘接强度均无显著差异，但对未打磨牙釉质，应酸蚀６０ｓ。

The tensile bond strength between enamel and orthodontic bracket mediated by two no mix adhesives and two mix adhesives was tested in case of three experimental conditions. The results showed: 1) for four adhesives the bond strength at the environment of 37℃ and 100%rh was more than 2.5 MPa after 5 min and 6 MPa after 1 day immersion in the water at 37℃, and the bond strength of two no mix adhesives within 1 day rised with increasing of time, 2) there were no remarked differences in bond strength among 1～10 min placing of the adhesive primer at the environment of 37℃ and 100%rh before bonding, 3) there were no discrepancies in bond strength among 15～60 sec etching for smooth enamel surface, and etching 60 sec for non ground enamel was necessary.