A total of 20 atrophic maxillary sinuses were augmented with recombinant human platelet-derived growth factor BB (rhPDGF-BB), alloplast, and bovine xenograft using a direct approach. CBCT imaging was performed at baseline, immediately postoperatively, and at 6 and 30 months postoperatively. A histologic evaluation revealed the bone bridging and bone regenerative efficacy of the graft material. Radiographic evaluation determined the ridge height (H) and volume of the graft (V) to be as 3.02 ± 1.35 mm at baseline (H0), 15.18 ± 2.52 mm (H1) and 1,106.10 ± 398.84 mm3 (V1) immediately postoperatively, 14.79 ± 2.30 mm (H2) and 1,086.95 ± 396.86 mm3 (V2) at 6 months, and 1,058 ± 391.83 mm3 (V3) at 30 months, with a significant gain in the residual ridge height at 6 months and no significant loss or gain in sinus volume postoperatively.
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