[Prosthetic rehabilitation after osteonecrosis of the jaws due to histiocytosis X and treatment with bisphosphonates apropos of a case]

Bisphosphonates are involved in the occurrence of Osteonecrosis of Jaws (ONJ), which is a complication of these treatments. This osteonecrosis concern the alveolar bone and develops generally after an oral surgery. It can however occur spontaneously without preliminary dental extraction. Other risk factors could play potentiates the risk of ONJ. This osteonecrosis results in an osseous exposure in patient treated or having been treated by bisphosphonates, without any cervico-facial irradiation. Actually, no treatment has been the proof of its effectiveness. Preventives measures of ONJ in oral cavity are the best method before, during and after administration of bisphosphonates. In this article, we present the clinical case of a patient with histiocytois treated by bisphosphonates and having developed ONJ. The selection criteria of the prosthetic rehabilitation as well as the techniques used are detailed.