Patients in need for implant-supported restoration in maxillary posterior sites with insufficient residual bone height will be randomly allocated to two different arms. Crestal sinus lift with simultaneous implant placement will be performed in both groups. Control group: crestal sinus lift with no adjunctive biomaterial; Test group: crestal sinus lift associated with xenogenic bone graft and collagen membrane; Six months after implant placement, implants will be loaded with definitive screw-retained prostheses. Six months later, patients will be recalled for clinical and radiographic assessment.
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Complications rate
Timeframe: 12 months