Abstract The study was carried out in a Brazilian population and the aim was to describe the prevalence and the clinic-radiographical features of jaw lesions. In addition, a comparison between the main diagnosis hypothesis and final diagnosis was accessed. A prospective study which evaluated all patients with jaw lesions diagnosed in an Oral Diagnosis Center, between August 2013 and October 2014. A total of 450 patients were observed for the first time, and 130 had some type of jaw lesion. The mean age of the patients was 35.2 years ± 17.86. Among these, 71 were women (54.62%) and 87 were Caucasian (66.92%). The mandible was affected more frequently (71.43%) than the maxilla (28.57%). Swelling and pain were the most frequent clinical signs and symptoms and were observed in 60 (42.85%) and 38 (27.14%) cases, respectively. The panoramic x-ray was the main radiographic exam utilized (88.57%). Radiolucent lesions accounted for 89 cases (63.57%) and the unilocular form was present in 114 cases (81.43%). A total of 93 cases had histopathological analyses and the periapical cyst was the most frequent lesion. In the other 47 lesions, the diagnosis was conducted by clinical and radiographic management. Bone lesions were frequent, being noted on first visit in approximately 30% of patients; in 1/3 of the cases, the diagnoses were completed with a combination of clinical and radiographic exams.

O presente estudo teve como objetivo apresentar um caso de osteonecrose dos maxilares associada ao uso de ácido zoledrônico (5 mg) administrado uma vez ao ano para tratar a osteoporose. Uma mulher de 79 anos de idade estava em tratamento de osteoporose por 5 anos com 5 aplicações do ácido zoledrônico foi encaminhada para nossa avaliação. A paciente tinha sido submetida à colocação de implante dental e não houve osseointegração. Ao exame clínico, supuração e osso exposto no rebordo alveolar foram observados. Os exames radiográficos revelaram uma área osteolítica e sequestro ósseo. Ambos os aspectos clínicos e radiográficos eram sugestivos de osteonecrose. O tratamento consistiu de cirurgia para remover todo o osso afetado. A paciente está assintomática há 9 meses (desde a cirurgia). Cirurgiões-dentistas e cirurgiões orais devem estar atentos para a possibilidade de osteonecrose relacionada ao uso de injeções anuais de ácido zoledrônico para tratamento da osteoporose pós-menopausa.

This paper presents a case of osteonecrosis of the jaw related to zoledronic acid (5 mg) administered once yearly to treat osteoporosis. A 79-year-old woman who has been treated for osteoporosis for 5 years with 5 applications of zoledronic acid was referred for evaluation. The patient had been submitted to dental implant placement and there was no osseointegration. On clinical examination, suppuration and exposed bone on the alveolar ridge were observed. Radiographic examination revealed an osteolytic area and bone sequestration. Both clinical and radiological features were suggestive of osteonecrosis. The treatment consisted of surgery to remove the affected bone completely. The patient is asymptomatic at 9 months after surgery. Dentists and oral surgeons should be alert to the possibility of osteonecrosis related to the use of once-yearly injections of zoledronic acid for the treatment of postmenopausal osteoporosis.