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Abstract : The severely compromised socket prevents immediate implant placement and necessitates bone grafting as the first surgical procedure since implant placement within the remaining bone would result in a drastically off-axis implant placement. A comparative clinical study was conducted on a series of 18 patients with 30 alveolar ridge defects suffering from a horizontal bone defect that will result in the exposure of 2 to 3 mm of the implant threads after the implant placement in the anterior region of the maxilla. The patients were divided into three equal groups: The xenograft bone ring, EthOss® bone graft, and β-TCP bone graft. All of which were used to augment the alveolar ridge simultaneously with implant placement. The groups were assessed 6 months postoperative in terms of bone gain, marginal bone loss, and implant survival rate. All augmented alveolar ridges showed bone gain after 6 months of the surgery. Implants placed in alveolar ridge augmented with xenograft bone ring showed the most marginal bone loss. The implant survival rates were 100% in both the EthOss® bone graft group and the β-TCP bone graft group and 90 % in xenograft bone ring group. Bone ring augmentation technique could be an effective alternative option for the augmentation of the horizontally defected alveolar ridges. This technique could be a valid option for the restoration of alveolar bone defects in terms of bone gain, and implant survival rate.