RESUMEN
Inflammation of bone is caused either by bacterial infection or occasionally by physical stimulus. Primary chronic osteomyelitis of mandibular bone is a chronic inflammation of an unknown cause. Pain, swelling, limited mouth opening, regional lymphadenopathy and hypaesthesia are clinical symptoms at initial presentation. Results of biopsy, computed tomography and scintigraphy reveal the diagnosis of a primary chronic osteomyelitis. Its management is long-term antibiotic therapy, hyperbaric oxygen and surgical therapy, even bisphophonate treatement may be a good option. The case report presents a primary progressive chronic osteomyelitis of the manibular bone of a ten year old boy. Clinical and radiological signs are discussed as well as diagnosis, management and follow-up.