Sinus Floor Elevation with Modified Crestal Approach and Single Loaded Short Implants: A Case Report with 4 Years of Follow-Up

Figure 4

Crestal sinus floor elevation was performed. In the premolar site, collagen sponges were placed, and a 4.25 × 8.5 mm long implant was inserted. In the molar site, a “future site” elevation was achieved with collagen sponges deeply together with a xenograft at the base of the sinus and into the osteotomy.