Block bond grafts harvested from posterior mandible offer several advantages for localized ridge augmentation prior to implant placement. The harvesting procedure is not complicated and can be performed under local anesthesia without sedation. The harvested bone is corticocancellous in nature but consists mainly of cortical bone. Considerable amounts of bone can be harvested from this area for use as an onlay graft to increase the width of alveolar ridge of up to a span of four teeth. Implant surgery can be executed within 4-5 months after grafting, at which time block grafts still maintain their dense quality and exhibit minimal resorption upon uneventful incorporation. This article describes the surgical technique, using basic oral surgical instruments, for harvesting block bone from retromolar region for localized ridge augmentation before insertion of dental implant.Block bond grafts harvested from posterior mandible offer several advantages for localized ridge augmentation prior to implant placement. The harvesting procedure is not complicated and can be performed under local anesthesia without sedation. The harvested bone is corticocancellous in nature but consists mainly of cortical bone. Considerable amounts of bone can be harvested from this area for use as an onlay graft to increase the width of alveolar ridge of up to a span of four teeth. Implant surgery can be executed within 4-5 months after grafting, at which time block grafts still maintain their dense quality and exhibit minimal resorption upon uneventful incorporation. This article describes the surgical technique, using basic oral surgical instruments, for harvesting block bone from retromolar region for localized ridge augmentation before insertion of dental implant.