Patient and population (P) Healthy patients with a horizontal alveolar deficiency following tooth loss or congenitally missing tooth/teeth.
Intervention (I) Horizontal alveolar ridge augmentation with an allogeneic bone block graft.
Comparator or control group (C) Horizontal alveolar ridge augmentation with autogenous bone block graft.
Outcomes (O) Survival of suprastructure, implant survival rate, implant stability, bone-to-implant contact, peri-implant marginal bone loss, histomorphometric assessment of new bone formation, residual allogeneic bone graft and connective tissue, gain in alveolar ridge width and volumetric reduction of the augmented area, patient-reported outcome measures, biologic and technical complications.
Study design (S) Randomized controlled trials, controlled clinical trials, case-series and retrospective studies assessing horizontal alveolar ridge augmentation with an allogeneic bone block graft compared with autogenous bone block graft. Moreover, human studies solely assessing horizontal alveolar ridge augmentation with allogeneic bone block graft was included as non-comparative studies.
Focused question Are there any differences in implant treatment outcome after horizontal alveolar ridge augmentation with an allogeneic bone block graft compared to autogenous bone block graft?