In the framework of modern minimally invasive restorative dentistry that relies on the application of enamel-dentine adhesive systems and a new approach to cavity design, the properties of dental tissues should be considered not only in anatomical and histological, but also in biological context. clinical success largely depends on the proper understanding of dental hard and soft structures. Enamel is the hardest tissue in the body that forms the outer part of the tooth crown and protects the underlying dentine and pulp. It is a highly mineralised tissue consisting of about 96 wt% of inorganic matter, 1 wt% of organic matter, and 3 wt% of water.
