Evans R, Oliver R
Department of Orthodontics and Children's Dentistry, United Medical School, Guy's Hospital, London.
Eur J Orthod. 1991 Dec;13(6):493-500. doi: 10.1093/ejo/13.6.493.
The aim of this study was to investigate the in vitro 24-hour tensile/peel bond strength of glass ionomer cement (GIC) together with the amount of cement left attached to the enamel surface after bond failure. The effect of contamination with moisture during setting/hardening and changing the powder/liquid mixing ratio of the GIC was also studied. Five GIC's (Intact, Fuji II, Orthocem B, ChemFil II, and Ketac Fil[capsulated]) and one composite resin (Concise) were tested by bonding GAC eyelets, with a curved photo-etched base, to the buccal surface of human premolars. Bond strength testing was performed on an Instron 1185 testing machine and the amount of cement left attached to the enamel surface quantified using the ARI index. The tensile/peel bond strengths achieved with all the GIC's were significantly lower than the composite resin (P less than 0.0002). Increasing the powder/liquid ratio resulted, in general, in higher bond strengths, the increase being significant for Intact and Orthocem B (P less than 0.05). Protection from moisture did not significantly affect the bond strength with the exception of Fuji II, for which, there was a significant decrease when the material was mixed at the recommended powder/liquid ratio.
本研究的目的是调查玻璃离子水门汀（GIC）的体外24小时拉伸/剥离粘结强度，以及粘结失败后附着在牙釉质表面的水门汀量。还研究了凝固/硬化过程中水分污染以及改变GIC粉液混合比的影响。通过将带有弯曲光蚀刻基底的GAC小孔粘结到人前磨牙的颊面，对五种GIC（完整型、富士II型、正畸用玻璃离子水门汀B、化学固化玻璃离子水门汀II型和Ketac Fil[胶囊型]）和一种复合树脂（Concise）进行了测试。在Instron 1185试验机上进行粘结强度测试，并使用ARI指数对附着在牙釉质表面的水门汀量进行量化。所有GIC获得的拉伸/剥离粘结强度均显著低于复合树脂（P小于0.0002）。一般来说，提高粉液比会导致更高的粘结强度，完整型和正畸用玻璃离子水门汀B的这种增加具有显著性（P小于0.05）。除富士II型外，防潮对粘结强度没有显著影响，当该材料按推荐的粉液比混合时，其粘结强度显著降低。
