Figure 1.

Representative photograph of the surgical procedure (A), including the graft sites of the no-membrane-cover group (left; bovine hydroxyapatite [BH] particles incorporated with collagen matrix [BHC] alone) and the membrane-cover group (right; BHC covered with a collagen membrane). Descriptive photomicrograph (B: H&E, ×40) showing the different areas used for histometric analysis. The augmented area (AA, b) is bounded by an inferred baseline and augmentation line; the resorption area (RA, a) is bounded by an inferred baseline and resorption line; the total area includes both the AA (b) and RA (a). The inferred baseline is an imaginary line drawn as an extension of the external surface of the native alveolar bone. Black dotted line: inferred baseline, red dotted line: resorption line, blue dotted line: augmentation line, black asterisk: residual BH particle.