Implant Stability and Elevation Outcomes of Crestal Sinus Floor Elevation with Densah Burs in Sites with Limited Residual Bone Height: A Prospective Clinical Study

A BSTRACT Background: Rehabilitation of the posterior maxilla with dental implants is often challenged by limited residual bone height (RBH) and sinus floor obliquity. Aim: To evaluate clinical outcomes of crestal sinus floor elevation (SFE) using Densah burs with simultaneous implant placement in sites with oblique sinus floor morphology and RBH of 4-7 mm. Methods: A prospective clinical study was conducted on 60 patients requiring posterior maxillary implants. Patients were randomized into two groups: Group I (Densah burs alone) and Group II (Densah burs with adjunctive grafting). Outcomes assessed included final seating torque, vertical elevation achieved, and resonance frequency analysis (RFA) scores. Results: The cohort included 25 men and 35 women (20–65 years). Elevation gain was significantly greater in Group I (4.22 ± 0.55 mm) than Group II (3.96 ± 0.29 mm; P = 0.042). RFA scores were significantly higher in Group II (74.33 ± 4.86) compared with Group I (67.76 ± 4.05; P < 0.001). Seating torque showed no significant difference. Conclusion: Crestal SFE with Densah burs is a predictable technique for cases with 4-7 mm RBH.