Simultaneous sinus augmentation with implant placement: histomorphometric comparison of two different grafting materials. A multicenter double-blind prospective randomized controlled clinical trial.

in the past 25 years a number of different bone substitutes, 1including allografts, xenografts, and alloplastic materi-als, either alone or in various combinations, have been used in sinus elevation. Autogenous bone is a unique grafting material with osteoconductive, osteoinductive, and osteogenic properties.