Sinus Augmentation With Allograft-Bone Substitute in Severe Maxillary Atrophy

A prospective analysis was performed on a single-arm clinical trial involving 60 posterior maxillary edentulous sites in 42 patients with a residual bone height of \<4 mm. All sites were treated with lateral window sinus floor augmentation (LWSFA), followed by grafting using a 1:1 ratio of 30% HA with 70% β-TCP (Osteon II, Dentium, Korea). At 6 months postoperatively, core biopsies were harvested during implant placement to assess the histological outcomes of the grafted sites.