Following tooth removal/extraction, horizontal bone loss occurs at a faster rate and to a greater extent compared to vertical bone loss. Horizontal ridge defects are of increased concern for the placement of dental implants and implant-supported dental prosthesis. Various techniques have been proposed to treat horizontal ridge defects and create sites favorable for dental implant placement. These techniques vary depending upon factors such as the tissue thickness, arch position, and availability of autogenous bone. Each technique has its own advantages and disadvantages & predictive success level. This review focuses on various techniques available to augment horizontal ridge defects for dental implant placement.