Figure 14.

Exemplary OCT images of structural features in Class II and V composite restorations (C) that determine their functionality and are essential for the evaluation of the restorations. (a) Positive step and composite excess at the restoration margins, (b) interfacial adhesive defect (bond failure), (c) composite excess at the restoration margin, increment lines and bubbles in the restoration material, (d) irregular coating of the cavity with adhesive (A) and recession of the marginal gingiva (G), (e) negative step at a restoration margin, irregular coating with adhesive and bubble in the restoration material, (f) bubbles in the restoration and recession of the marginal gingiva. Enamel (E), dentin (D), the enamel-dentin junction (EDJ), cohesive defect (Def). The vertical scales are related to the refractive index n = 1.0 (see remark in Figure 4).