Surgical treatment was planned to remove the entire cystic lesion and reconstruct the affected jaw portion in a single stage. Costal rib graft was harvested for the reconstruction of the mandible. Through intraoral approach, crevicular incision was placed in the mandibular anterior teeth region extending posterior till mandibular notch, gingivomucoperiosteal flap was raised, cystic lesion was surgically exposed and the affected portion was removed along with the involved teeth in toto and reconstruction was done using long titanium bone plate and costal graft maintaining the contour of the mandible. After successful graft uptake, dental rehabilitation will be done using dental implants in the newly formed bone.