Dentinbonding

Dentinbonding refers to the process of adhering restorative materials, such as composite resins or cements, to dentin, the layer of tooth structure beneath the enamel. This is a crucial step in modern restorative dentistry, enabling more conservative and aesthetically pleasing treatments. Dentin, unlike enamel, is a more complex substrate to bond to due to its higher water content and the presence of organic material. The objective of dentinbonding is to create a durable micromechanical and/or chemical bond between the restorative material and the dentin surface. This bond helps to prevent microleakage, which can lead to secondary decay, postoperative sensitivity, and restoration failure. The development of dentinbonding agents has significantly evolved over the years, moving from simpler etch-and-rinse systems to more streamlined self-etch and all-in-one systems. These agents typically involve an etching step to demineralize the dentin surface and create a receptive surface, followed by the application of a primer and/or adhesive resin that infiltrates the dentinal tubules and forms a hybrid layer. The hybrid layer is a key feature of dentin bonding, consisting of interpenetrating resin and collagen. Successful dentin bonding relies on proper technique, material selection, and understanding the principles of adhesion to this vital tooth structure.