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Biomedical subjects

F Cheynet

Publications and source records attributed to F Cheynet.

At least 55 records · Page 3Linked to original sources
PubMed1997

[The retromandibular approach in fractures of the mandibular condyle].

Various approaches have been proposed for surgical treatment of displaced condylar fractures included submandibular approach, preauricular approach, rhytidectomy approach or intraoral approach. Since 1992, we used a short retromandibular approach to treat displaced subcondylar fractures with a miniplate. When open reduction and osteosynthesis are required, the retro-mandibular approach is an easy and safe technique for displaced condylar fractures. The aim of this article was to describe the short retro-mandibular approach. Indications for surgical treatment, surgical approach and techniques of osteosynthesis for condylar fractures are discussed.

Bone Plates↗
PubMed1996

Clinical results of therapeutic temporomandibular joint arthroscopy: a prospective study of 34 arthroscopies with prediscal section and retrodiscal coagulation.

Thirty-four therapeutic temporomandibular arthroscopies were done during a 24-month period for patients with debilitating joint disorders (mainly disc displacements with or without reduction) who had not responded to non-invasive treatment. Lysis and lavage with prediscal section and retrodiscal coagulation were the techniques used. Analysis of the results indicated subjective improvement of pain in 71% of cases, noise in 78%, jaw opening in 88% and diet in 97% and objective evidence of disappearance of noise in 29% and improvement of jaw opening in 94% (mean 9.24 mm). In jaw opening, improvement was highly significant, compared with the preoperative results, P < 0.01. We conclude that temporomandibular arthroscopy is safe and indicated in disc displacements and joint luxation if medical treatment has failed.

Adolescent↗
PubMed1996

Short retromandibular approach of subcondylar fractures: clinical and radiologic long-term evaluation.

OBJECTIVE: The classic technique for open reduction of subcondylar fracture is the submandibular approach. The aim of this study was to evaluate long-term clinical and radiologic results of the short retromandibular approach to displaced subcondylar fractures. MATERIAL AND METHODS: During a period of 66 months we performed a prospective study with a modified version of the retromandibular approach in 38 patients with displaced subcondylar fractures. In this article we describe clinical and radiologic results in 19 patients with follow-ups longer than 6 months (range, 6 to 66 months). Preoperatively all patients had malocclusion and radiology demonstrated displacement. RESULTS: The retromandibular surgical approach was successful in all cases. Roughly 25 months after surgery, mouth opening was 43 mm with symmetric laterotrusive movements. Permanent marginal nerve palsy was never observed. CONCLUSIONS: Our findings indicate that the short retromandibular approach is an easy and safe technique for displaced subcondylar fractures.

Bone Plates↗
PubMed1996

[Proposal of a new topographic classification of mandibular fractures].

There has been a certain amount of confusion in publications concerning fractures of the mandible due to the lack of consensus on classification. Starting with the embryological, anatomic, biomechanical, pathogenic and epidemiological features of these fractures, we propose a new terminology and a new distribution of the units and subunits of the mandible in traumatology. The main point is to incorporate the angle subunit into the ramus unit.

Adult↗
PubMed1996

[The value of an osteosynthesis arch-plate combination in the application zone in the treatment of fractures of the body of the mandible].

Fractures of the tooth-bearing part of the mandibular body require both orthopedic stabilization of the maxillomandibular joint and surgical fixation. From an evaluation of the anatomic and biomechanical features of the mandible, we propose the notion of a useful zone for fixation. The useful zone is basically submitted to traction forces and includes both the teeth and the teeth-bearing bone situated above the mandibular canal in the body and the entire symphysis. Applying an arch-plate on the useful zone has the advantage of providing initial stability, progressive loading and reduction in risk of displacement or secondary infection. This therapeutic approach gives better results than simple plate fixation.

Adult↗
PubMed1996

[The contribution of arthroscopic treatment in temporomandibular disk-condyle displacements].

We report a prospective study of thirty four therapeutic temporomandibular arthroscopies that were done during a 24 months period for patients with debilitating joint disorders (mainly disc displacements with or without reduction) who had not responded to no-invasive treatment. The technics used were lysis and lavage with prediscal section and retrodiscal coagulation. Analysis of the results indicated subjective lessening of pain in 71% of cases, noise in 78% (with objective evidence of disappearance of noise in 29%), jaw opening in 94% (mean 9.4 mm) and diet in 97% (mean 9.4 mm). In jaw opening, improvement was highly significant, compared with the preoperative results, p < 0.01. We conclude that temporomandibular arthroscopy is safe and indicated in disc displacements and joint luxation if medical treatment has failed.

Adolescent↗
PubMed1995

[Melanotic neuroectodermal tumor in an infant].

BACKGROUND: Melanotic neuroectodermal tumor is a mostly benign tumor, rare in childhood, essentially located in the head and neck region. CASE REPORT: A two-month-old girl was seen for a rapidly increasing odontogenic tumor which appeared cystic at the CT scan. After enucleation, this premaxillar tumor recurred one month later with an osteogenic aspect at the CT scan. Urine catecholamine excretion was normal; Methyl Iodo Benzyl Guanidin scintigraphy failed to show any fixation and electron microscopy examination of the biopsy showed several varieties of melanocytes. A partial maxillectomy was performed by oral approach. The patient is well 4 1/2 years later. CONCLUSION: This observation confirms the recurrence potential of this tumor and the cosmetic interest of the oral surgical approach.

Female↗
PubMed1995

[Bone lengthening: application to the mandible. Review of the literature].

In literature, the authors demonstrate that progressive distraction osteogenesis, according to the Ilizarov method, is applicable to the mandible. Mandibular distraction is achievable through external approach or through oral approach. Further experimental and clinical studies will be necessary to define the most stable apparatus and the best indications that are currently hemifacial microsomia and facial asymmetry associated with T.M.J. ankylosis.

Animals↗
PubMed1995

[Complete lateralization of the inferior alveolar nerve. A preliminary study, apropos of a case].

Inferior alveolar nerve lateralisation is a new technique. Mostly indicated in implantology, the techniques described are partial and located at the anterior part of the nerve, near the foramen mentalis. The authors describe a technique of total inferior alveolar nerve lateralisation, from the lingulae mandibulae to the foramen mentalis. Total lateralisation technique can be used in dental prosthesis (in mandibular posterior edentulism when the alveolar bone is reduced and when the prosthesis compresses the nerve in the foramen region), in implantology (when terminal implant restitution is needed), or in benign tumors (when the horizontal branch of the mandible is resected).

Bone Resorption↗
PubMed1995

[Interposition of a full-thickness skin graft in the surgery of temporomandibular joint ankylosis. A study of 31 cases of which 20 had long-term follow-up].

Recurrence is the main problem in temporo-mandibular joint ankylosis treatment. Two therapy are used against this, physiotherapy and surgical joint interposition. Following ankylosis removal, many materials can be interposed but, for us, fullthickness skin graft using Popescu and Vasiliu technique seems to be the best and simplest one. This retrospective study of 31 cases, 20 with long-term follow-up, shows that good results are obtained using this skin graft, with 90% successful rate.

Adolescent↗
PubMed1994

[Mandibular reconstruction using a metallo-acrylic implant prosthesis in oncology. Apropos of 40 cases].

The authors report on 40 cases using acrylic-metal prosthesis after ablative cancer surgery and compare them with the literature. The long-term complications (prosthesis extrusion or infection) are important, but the short-term follow-up (3 months) is more than 80% of success, any material used. The prosthesis keep a physiological position to the mandible, against scar sequelae. The use of soft tissue closure without post-operative radiotherapy increase the success of a simple-used and low-priced device of mandibular reconstruction.

Acrylic Resins↗
PubMed1994

[Current surgical approach to masticatory system pain-dysfunction syndrome (except arthroscopy)].

The surgical treatment of SADAM concerns patients with irreversible lesions who continue to complain (disk displacement with pain and limited opening, painful arthrosis) after all the other therapeutic options have been unsuccessful and when no long-lasting improvement can be reasonable expected. Indications for surgery have declined with progress in aetiological treatment, particularly of occlusion, and arthroscopic treatment, but arthrotomy is the only remaining technique feasible in certain cases. SADAM should be a conservative surgery, protecting the disk (repositioning displaced disks, repairing perforated disks) and the articular surfaces (correcting bone irregularities). Anatomic and functional reconstruction of the joint cannot be successful unless the cause of the dysfunction is treated at the same time.

Arthroscopy↗
PubMed1994

[An osteo-cartilaginous graft for ankylosis].

Ankylosis of the temporomandibular joint was treated by resection of the ankylosed block and arthroplasty with an osteo-cartilage graft from the rib. The main feature was attaching the cartilage to the bony surface and the appearance of enchondral ossification. The value of this method is discussed.

Ankylosis↗
PubMed1994

[Indications for imagery in dysfunctional temporomandibular pathology].

Cranio-mandibular disorders include muscular and articular signs. Articular pathology is the only one that need to be structurally studied. Paraclinic indications are based upon physical examination. Bone structure can be explored with tomography or CT scan and intra-articular structures can be explored with M.R.I. or arthrography. Two pathologies have then been found with an excessive frequency, disc displacements and juvenile osteoarthrosis.

Cartilage, Articular↗
PubMed1994

[Aneurysmal cyst of the maxilla. Apropos of a case].

A case of extensive aneurysmal bone cyst of the maxilla is described, with a recurrence 2 years after surgical curettage, treated by new curettage and radiotherapy. The pathogenesis of this pseudo-cyst is yet obscure. While CT (and MR) demonstrate characteristic fluid-fluid levels, the diagnosis remains histological. A long survey, based on radiography, is necessary to detect recurrence.

Adolescent↗