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Choosing twelve patients, a key criterion was the presence of missing mandibular posterior teeth. Prior to surgical intervention, all patients underwent CBCT scans to evaluate residual bone height, which was measured to be between 5 and 7 mm from the inferior alveolar nerve. Sufficient alveolar ridge width exceeded 4 mm in all cases. Bone augmentation was performed on patients in two groups. Group I received an autologous onlay chin