RecruitingBiological interventionRidge Augmentation Using Allograft Particles Hydrated With or Without Recombinant Human Platelet-Derived Growth FactorThis study will compare two techniques to achieve increase in ridge dimensions as a preparation for dental implants using a resorbable barrier membrane and bone particulate allogenic graft hydrated with saline or a growth factor called Recombinant Human Platelet-Derived Growth Factor (rhPDGF).