Denosumab‐related osteonecrosis of the jaw following non‐surgical periodontal therapy: A case report

Introduction Osteonecrosis of the jaw associated with bisphosphonates is currently called medication‐related osteonecrosis of the jaw (MRONJ), given that in addition to bisphosphonates, jaw osteonecrosis has been related to the administration of other antiresorptive and antiangiogenic drugs, such as denosumab, sunitinib, bevacizumab and ipilimumab. Case Presentation A 77‐year‐old patient with osteoporosis treated with subcutaneous injections of denosumab at an interval of 6 months is presented. The patient developed MRONJ after receiving a non‐surgical periodontal therapy. Although the MRONJ was initially classified as a stage I lesion in this patient, cone beam computed tomography images confirmed the presence of a significant osteolytic lesion. Treatment consisted of the administration of chlorhexidine mouthwash and systemic doxycycline, exodontia of the involved teeth, sequestrectomy and complete surgical debridement of the necrotic bone. Conclusion To our knowledge, this is the first case reported in the literature of MRONJ following non‐surgical periodontal therapy in a patient with osteoporosis treated with denosumab. The risk of MRONJ development after a periodontal procedure and how to prevent this complication are still unknown.