zxA higher number of studies evaluated various types of bone graft materials for the lateral window approach due to the excessiveness over the crestal approach. Autogenous bone was the first one to be investigated, because of its osteogenic, osteoinductive and osteoconductive properties (Boyne & James, 1980); however, the disadvantages were also reported, such as high surgical morbidity, patients' discomfort and unpredictable resorption rate, resulting in decrease of the grafted site volume (Hallman & Thor, 2008). Therefore, bone substitutes have been considered as an alternative to compensate