refers to the space on the tooth surface occupied by the junctional epithelium and the connective tissue attachment fibers immediately apical to (below) the junctional epithelium (Fig. 7-12). This biologic width can be "violated" or damaged by restoration margins. The series of drawings in Fig. 7-13 shows the biologic width and its relationship to a properly placed margin and a restoration margin that violates or damages the biologic width.