Asmussen E, Munksgaard E C
Int Dent J. 1985 Jun;35(2):160-5.
Effective bonding between restorative resins and hard dental tissues would eliminate the need for retentive undercuts and prevent the formation of marginal gaps. While bonding to enamel has found a satisfactory solution with the advent of the acid etch technique, bonding to dentine has been more elusive. Restorative resins may bond to dentine through mechanisms involving either the inorganic or the organic constituents of the dentine. In the present work the possibility of bonding to the organic part of dentine was investigated. Since the water present in the surface of moist dentine may impede bonding, the research was focused on adhesives that are operational in aqueous environments. Aqueous mixtures of aldehydes and certain active monomers constitute such adhesives. The strength of the bond between a restorative resin and dentine was measured using the mixtures as intermediaries. To remove the smear layer the dentine was pretreated with 0.5 M EDTA, pH = 7.4. Among the aliphatic aldehydes especially propionic aldehyde and glutaraldehyde were found to be effective. Aromatic aldehydes resulted in bonds of low strength. Among the monomers investigated HEMA (hydroxyethyl-methacrylate) gave rise to the bond of highest strength. Using an adhesive based on HEMA and propionic aldehyde or HEMA and glutaraldehyde bond strengths of 15 and 18 MN/m2, respectively, were obtained. The latter adhesive significantly reduced the width of the polymerization contraction gaps between resin and dentine.
修复性树脂与坚硬的牙体组织之间的有效粘结将不再需要固位倒凹，并防止边缘间隙的形成。虽然随着酸蚀技术的出现，与牙釉质的粘结已找到令人满意的解决方法，但与牙本质的粘结却更难实现。修复性树脂可通过涉及牙本质无机成分或有机成分的机制与牙本质粘结。在本研究中，对与牙本质有机部分粘结的可能性进行了调查。由于湿润牙本质表面存在的水分可能会阻碍粘结，因此研究集中在可在水环境中起作用的粘合剂上。醛类与某些活性单体的水性混合物构成了这类粘合剂。以这些混合物作为媒介，测量了修复性树脂与牙本质之间的粘结强度。为去除玷污层，用pH = 7.4的0.5 M乙二胺四乙酸（EDTA）对牙本质进行预处理。在脂肪醛中，尤其发现丙醛和戊二醛是有效的。芳香醛导致的粘结强度较低。在所研究的单体中，甲基丙烯酸羟乙酯（HEMA）产生的粘结强度最高。使用基于HEMA和丙醛或HEMA和戊二醛的粘合剂，分别获得了15和18 MN/m²的粘结强度。后一种粘合剂显著减小了树脂与牙本质之间聚合收缩间隙的宽度。
