[Ewing's sarcoma of the jaw. The value of multidisciplinary management. Apropos of 4 cases].

Ewing's sarcoma is the second most common malignant bone tumor of childhood, yet it is a rare tumor. Primary maxillary localization is unusual and occur in only 1-2% of cases, mostly in the mandible. The prognosis of Ewing's sarcoma has been improving considerably since the introduction of combined modality treatment.

Craniofacial behavior of sutures in young rabbits postimmobilization.

Although sutures have been identified as being important growth sites of the craniofacial complex, some points are still debated. The aim of our work was to analyze coronal suture response after immobilization in 24 New Zealand White rabbits. This immobilization was induced by an adhesive that bridged the coronal suture under investigation.

[The morphogenesis of the temporomandibular joint considered in its phylogenic aspects in vestibular orientation].

Comparative phylogenic movements of skull points can be obtained using vestibular orientation and skulls from various mammals after reducing the bimediocondyle distance to approximately 100 mm (as in man). With this method, the condyle is seen to move backwardly and rise in a very thin bony area which will be covered by the increasing volume of the encephalus. A "mandibulocerebral" index of less than 100 is a criteria of humanoid species.

[Facial volume and its global position in vestibular orientation, in adults and during growth].

Two sagittal surfaces were defined on the dry skull of 96 youngs and 51 adults Caucasian subjects in vestibular orientation. The surface of the face and the surface of the "total face" (by including the buccodental and mandibular surfaces) were measured with a planimeter. From the longest maxillary and zygomatic distances, the volume of two ellipsoids were calculated.

[Orthognathic surgery of the atrophic upper jaw. A proposal for a single-stage treatment. Le Fort I osteotomy with bone grafts and implants].

We report an osteotomy technique for the maxilla using an iliac graft and simultaneous implantation for correction of atrophic class III dysmorphosis of the maxilla. The advantages and disadvantages of this technique are discussed on the bases of a 3-year experience.

[Closure of anterior oro-nasal communications, sequelae of cleft palate, using a retro-incisal flap].

The persistence of a residual communication between mouth and nose, is an important sequela a after primary closing of cleft palate. This retrospective study reports twenty-one cases of a new technique (retro-incisive flap) used for closing this residual communication. This flap is an easy and reliable method with an 85% success rate, so we recommend it as the first choice in this indication.

[Intra-masseter metastasis of a gastric adenocarcinoma].

We report a case of metastasis in the masseter muscle secondary to stomach carcinoma. Second neoplastic invasion in skeletal muscle is an exceptional phenomenon. And this frequency is paradoxical against corporeal muscular mass.

[Severe diffuse facial cellulitis].

Twenty cases of severe cervicofacial infections among 184 cases of cellulites treated in 1991 and 1992 at the Lille University Hospital were investigated. Outcome was compared with results reported in the literature. Outcomes were similar and emphasized the critical nature of this type of infection which caused 7 deaths in our series and severe anatomic and functional sequelae.

[Immature teratoma of the mandible with ameloblastic component].

A case of immature teratoma involving mandible in a 56 year old woman is reported. This teratoma is composed of ameloblastoma structures mixed with some usual components of teratoma: osseous and cartilaginous foetal tissue, indifferenciated blastema, neuroblastic structures, acinous glands and melanotic cells. A lymph node is involved by metastatic mature glial tissue.

[Intravenous sedation in implantology].

Local or block anesthesia can be used satisfactorily in many implant procedures. However, when advanced implant techniques or pre-prosthetic reconstruction surgery of the maxillofacial bones are required, local or regional anesthesia is insufficient. The "day-hospital" concept is a rational approach which meets the requirements for anesthesia and deep sedation with criteria for patient safety and comfort while guaranteeing optimal operating conditions.

[Mandibular mechanics in temporomandibular joint pain-dysfunction syndrome].

There are several reasons for perturbed mandibular mechanics in SADAM: craniofacial architecture anomalies, malocclusions, lingual dyspraxia, postural disorders. SADAM diagnosis and therapeutics should be conducted by a pluridisciplinary team.

[Risks and regulations related to materials used in implantology and maxillofacial surgery].

In the present paper, the authors call in mind the definitions of biocompatibility and the essential qualities required for biomaterials. The materials mostly used in implantology and maxillofacial surgery are numerous alloys, bioceramics, resorbable and non-resorbable polymers, and finally osseous substitutes of human or animal origin. As to synthetic and non-living materials, the risks in patients are generated by the degradation products.

[A panorama of current materials for osseous application in maxillofacial surgery and oral implantology].

Many materials are used in bone reconstruction. According to their physico-chemical structure, their activity is based on one of the three main mechanisms of bone repair: osteogenesis, osteoconduction, osteo-induction. The materials can be classified in two categories: tissues and substitution biomaterials.

Evaluation of desmopressin for dental extractions in patients with hemostatic disorders.

We evaluated the effectiveness of desmopressin to control bleeding of patients with coagulation defects during dental surgery. Thirty-five patients, mainly with moderate and mild hemophilia and Willebrand disease, were undergoing dental extractions (over 80 extractions in total). Bleeding was successfully prevented in 28 patients with the use of a combined treatment incorporating IV desmopressin, an antifibrinolytic agent (tranexamic acid), and local methods (surgical glue and compression techniques).

[Maxillary ossifying fibroma: apropos of 3 cases].

Three cases of ossifying fibroma of the maxilla are reported in two young females and in one child. The characteristic of this benign fibro-osseous tumour are described. The authors insist on the necessity of a confrontation between the clinical, the radiological and the histopathological aspects of this tumour to establish a diagnostic.

[The first clinical application of the vestibular orientation of the head using a scanner, in children presenting with asymmetry].

Digitalized imaging now allows determination the "medio-labyrinthic" plane to analyse cephalic symmetry. It is constructed from the two "vestibions", central points of the rings of lateral semi-circular canals. Reconstruction parallels this plane, passing through the vestibions provide vestibular orientation, with effective and constant coïncidence between right and left directions.

[Infectious temporomandibular arthritis. Apropos of a case in an adult].

Imagery revealed osteitis of the base of the skull in a 37-year-old patient with infectious arthritis of the temporomandibular joint. The characteristics of this rare pathology were recalled from a review of the literature.