[Ankylosis of the temporomandibular joint: a rare manifestation of ankylosing spondylitis]. / Ankylose de l'articulation temporo-mandibulaire: rare manifestation de la spondylarthrite ankylosante.

INTRODUCTION: The ankylosing spondylitis is a chronic inflammatory rheumatoid disease with predilection in the axial structures. The temporomandibular joint (TMJ) is involved in 10 to 24% of cases. Ankylosis of the TMJ is exceptional, only 11 cases being reported to date. OBSERVATION: A 48-year-old patient had been followed since 1987 for severe ankylosing spondylitis. The patient, known to be positive for tissue antigen HLA B27, was admitted for limitation of mouth opening. At physical examination, mouth opening was reduced to 1cm with no mandibular movements and a stiffness of the cervical spine in flexion. Computed tomography of the TMJs highlighted a bilateral lesion with ankylosis of the left joint and of C1-C2. Surgical treatment consisted in block resection of the two TMJs using a cartilaginous rib. With a follow up of 9 months, results have been satisfactory. DISCUSSION: Complementary explorations should be undertaken in ankylosing spondylitis patients with clinical symptoms suggestive of TMJ lesions in order to establish the diagnosis and initiate treatment and avoid the development of ankylosic forms.

[Osteoradionecrosis of the jaws. Apropos of 7 cases]. / L'ostéoradionécrose des maxillaires. A propos de 7 cas.

Jaw osteoradionecrosis (ORN) is one of the most serious complications of cervico-facial cancer irradiation. Severity is related to major bone lysis and the difficult medical and surgical treatment. We report our experience in seven cases over a ten-year period. Mandibular localization was predominant (85%). The mean age of the patients was 36 years. The average delay to development of ORN was 5.5 years. The treatment was medico-surgical, based on wide surgical exeresis (6/7), frequently via endobuccal surgical approach (4/7). Prevention remains the best treatment of ORN associated with an accurate management of all patients who need radiotherapy.

[Histiocytosis X with mandibular involvement. Apropos of a case]. / Histiocytose X à localisation mandibulaire. A propos d'un cas.

This is a case report of mandibular Histiocytosis X in its Eosinophilic Granuloma's form. A review of literature is realized in the two clinical forms of Histiocytosis X: localised forms, with insistance in the Eosinophilic Granuloma of jaws, and diffused forms represented by the Letterer-Siwe disease and the Hand-Schüller-Christian disease.