Asmussen E, Munksgaard E C
Institute of Technology, Royal Dental College, Copenhagen, Denmark.
Int Dent J. 1988 Jun;38(2):97-104.
In conjunction with the acid etch technique for bonding of restorative resins to enamel, an effective bonding to dentine would eliminate the need for retentive undercuts and ensure a tight marginal seal. Bonding to dentine can be achieved through dentine adhesives. These may be divided into Ca2+-bonding and collagen-bonding types. Several Ca2+-bonding adhesives are based on phosphate methacrylates. Adhesives of this type mediate a bond strength to dentine not exceeding 10 MPa. In contrast, Bowen's bonding system and the Gluma system yield bond strengths higher than 10 MPa. The two latter systems have recently been conceived in simplified versions. In general, the higher the bond strength to dentine mediated by an adhesive, the smaller are the marginal gaps formed by a composite resin polymerizing in a dentine cavity treated by the adhesive. The size and the shape of the cavity influence the width of the marginal gaps. A cavity having a V-shape gives rise to smaller gaps than box-shaped cavities. A filling technique with two 'inclining' layers reduces the width of marginal gaps. Combination of certain Ca2+-bonding and collagen-bonding adhesives results in increased bond strength and smaller marginal gaps.
在用于将修复性树脂粘结到牙釉质的酸蚀技术的配合下，与牙本质的有效粘结将消除对固位倒凹的需求，并确保紧密的边缘密封。通过牙本质粘结剂可以实现与牙本质的粘结。这些粘结剂可分为钙离子粘结型和胶原粘结型。几种钙离子粘结型粘结剂基于甲基丙烯酸磷酸酯。这类粘结剂介导的与牙本质的粘结强度不超过10兆帕。相比之下，鲍恩粘结系统和Gluma系统产生的粘结强度高于10兆帕。后两种系统最近已经有了简化版本。一般来说，粘结剂介导的与牙本质的粘结强度越高，由粘结剂处理过的牙本质腔中复合树脂聚合形成的边缘间隙就越小。窝洞的大小和形状会影响边缘间隙的宽度。V形窝洞产生的间隙比盒形窝洞小。采用两层“倾斜”层的充填技术可减小边缘间隙的宽度。某些钙离子粘结型和胶原粘结型粘结剂的组合可提高粘结强度并减小边缘间隙。
