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Biomedical subjects

M Benoist

Publications and source records attributed to M Benoist.

At least 91 records · Page 5Linked to original sources
PubMed1981

[Treatment of intervertebral disk sciatica by chemonucleolysis. Analysis of 56 cases].

The authors report 56 cases of sciatica treated by chemonucleolysis with follow-up ranging from six months to two years. All patients presented with manifest clinical symptomes of intervertebral disc herniation, and the diagnostic was verified by myelography. In all cases myelographic findings corresponded to clinical topography when the topography was precisely defined. This group of patients, therefore, was highly selected, and the authors attempted to eliminate excluded herniations when the myelographic anomaly appeared at a distance from the intervertebral space. Cases of sciatica caused by stenosis, paralytic sciatica, and pure lumbar pain were not treated in this study. At the end of the second month, 70 percent of patients obtained good results; the authors, believe, therefore, that failure of treatment can be ascertained by the eighth week. Thirteen of the fifteen treatment failures in this study were operated. Results of this surgery performed after chemonucleolysis were similar to results obtained from surgery performed as initial treatment. No serious complications were observed. Chemonucleolysis, therefore, appears to be an effective means of treatment for sciatica caused by intervertebral disc herniation. Based on their own experience and reports in the literature, the authors believe that chemonucleolysis is the ultimate stage of conservative treatment when classical measures have failed. In addition, the authors' experience and careful review of the literature has shown that serious iatrogenic accidents are exceptionally rare and can be avoided by the use of rigorous technique.

Adult↗
PubMed1981

[Hypercondylia and lateral deviations of the mandible (author's transl)].

Hypercondylia is a relative rare, benign affection presenting as asymmetry of the lower facial region with laterognathia, dental articulation disorders, and minimal functional effects on the temporomandibular joints. These clinical manifestations, confirmed by the presence of lesions of the condylar region on radiological examination, vary as a function of the directional axis and course of the hyperplasia. Various distinct and sometimes extremely different radioclinical pictures can therefore be distinguished. Therapy aims at re-establishing facial harmony and restoring altered dental articulation. Whereas minor anomalies can be corrected by orthodontic or prosthetic treatment associated with plastic surgery, severe abnormalities require major reconstructive surgery as determined by orthopedic investigations.

Adult↗
PubMed1979

[Postoperative sciatica from epidural fibrosis and lumbar arachnoiditis. Results of 38 repeat operations].

Lumbar epiduro-arachnoiditis is a well-known complication of surgery of the intervertebral disc. The epidural fibrous scar is the normal outcome of inflammatory activity secondary to the mechanical tissue disturbance resulting from surgery. In certain individuals, perhaps genetically predisposed as excessive quantity of fibrous tissue is deposited in the epi and/or nitradural space. This abnormal situation, comparable to cheloid cutaneous scars, is perhaps at the origin of the clinical symptoms. The authors report the clinical and radiological signs observed in 38 patients having had at least one operation for discal hernia, and who underwent further operations in the aim of freeing the roots and the dural sack from fibrous compression. Results of excision of the epidural "cheloid" were good in 13 cases, and average in 8 others. There was a complete failure in 17 other patients. Three explanations were offered to explain the frequency of the failures: 1) formation of a new cheloid, 2) difficulty of neurolysis of the arachnoiditis, 3) possibility of intrinsic lesions of the nerve associated with the epiduro-arachnoiditis.

Adult↗
PubMed1978

Experience with 220 cases of mandibular reconstruction.

Extensive resections of the mandible are usually carried out for malignat tumours or non-malignant tumours with a tendency to reccur, such as ameloblastomas. These hemi-resections include the ascending and horizontal ramus of the mandible. Such mutilations have serious functional and aesthetic consequences. In order to avoid these drawbacks we use two sorts of implants. The first are made from metallic and plastic materials. They are used when patients are too weak to support a bone graft, when there is insufficient soft tissue coverage, or when a recurrence of the tumour is feared. In order to be well tolerated they must be made of materials which are fully accepted by the tissues. For the plastic part we use methyl-methacrylate and, for the metal part, "durallium". The second type is used to maintain a bone graft in good position. It is completely metallic. The pattern is made in wax and reproduced in durallium. They are made and adjusted in the same way as plastic implants. The results are analysed separately covering two periods. In the first (1955-1967), the failures have been relatively large (25%). During the second period (1967-1974), a better choice of operative indications and a more precise technique gave better results (failure: 13%).

Ameloblastoma↗
PubMed1978

[Subcutaneous silicone gel prosthese (author's transl)].

The use of silicone implants to correct an acquired or congenital abnormality of the face involves the use of:--blocks of foam, though these retract and the volume implanted must therefore be overestimated.--compact blocks of elastomer, which tend to migrate and to produce inaesthetic bumps with disturbances in the vascularisation of the skin. The authors therefore had the idea of making "to measure" implants similar to breast implants: envelope of silicone elastomer enclosing a gel of chosen viscosity, absorbing forces applied to the envelope and therefore tending to prevent migration of the implant. The latter has dacron patches to facilitate its adherence to deep layers. This description of manufacturing methods and operative techniques, despite a short follow-up, reports encouraging results from which it is possible to determine the indications of this type of procedure.

Dental Implantation↗
PubMed1977

[Corticotomy. A rapid method for correction of incisor malpositions].

Since the studies of Bell and Cadenat about dento-alveolar revascularization after alveolar osteotomies, orthodontic surgery knows new developments. The surgical correction of isolated incisal malpositions by interalveolar corticotomies with immediate repositionning of dento-osseous segments, represents actually a rapid therapeutic method in comparison with orthodontic treatment or combined surgico-orthodontic procedure. The authors present a study upon 31 corticotomies performed these last two years. They clear the usual indications, note the importance of the pre-operative planning, expose their technique, finally they give an idea about the value of this procedure.

Adolescent↗
PubMed1977

[Secondary sliding of the mandible after sagittal osteotomy of the ascending ramus].

Thus in the area of prognathism, modifications would seem to develop during the first three months after deblocking:-true recurrences are rare and would appear to be avoidable by careful technique;-secondary sliding shoud not be the source of too much anxiety, being the result of spontaneous attempts at equilibrium and are of little aesthetic consequence. Our statistics indicate that sagittal osteotomy of the ascending rami gives 82% good results. This would agree with statistics generally found in the literature.

Humans↗