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Biomedical subjects

M Maréchal

Publications and source records attributed to M Maréchal.

6 recordsLinked to original sources
PubMed2002

[Guided bone augmentation in edentulous areas].

The use of autogenous onlay blocks placed together with self-tapping implants can achieve an excellent long-term success rate of individual implants. Autogenous bone chips or deproteinized bovine bone can be used to deal with fenestration and dehiscence defects when used in combination with e-PTFE membranes. The role of DFDBA as space maintainer under barrier membranes cannot be ignored. In most cases PTFE membranes are used because they offer reliable results. The use of a collagen membrane when supported by a bone substitute to maintain space gives good results, although long-term research is required. The future will be however tissue engineering. The principle is that a matrix, carrying stem cells and biological mediators like growth factors, is used. More research involves the use of human stem cells responsible for regeneration of different human tissues.

Alveolar Bone Loss↗
PubMed1993

[The role of the psychiatric nurse in an emergency service].

Since september 1989, 3 psychiatric nurses have been working with the crisis and psychiatric emergencies unit of the emergency service of Saint-Luc Hospital in Brussels (Belgium). In this paper, the authors examine the specific functions of psychiatric nurses in the taking in charge of psychiatric emergencies and functional somatic complaints, as well as their role in relation with the nursing team as a whole.

Emergency Services, Psychiatric↗
PubMed1989

[Surgical and non-surgical approach to deep periodontal pockets].

Deepened pockets are a challenge because they offer an anaerobic niche and because of their inaccessibility to personal plaque control measures. Scaling and root planing followed by regular professional plaque removal are effective in arresting the progress of most chronic adult periodontitis. Only when pockets remain inflamed after repeated thorough professional treatment during several months can a surgical pocket elimination technique be used. The results will depend on the type of attachment loss (horizontal vs. irregular) the root anatomy (furcations) and the training level of the operator, general practitioner or periodontologist. There is an increasing trend in the anterior parts of the oral cavity (monoradicular teeth easily accessible for plaque control) to use the Widman technique. Long-term data concerning the stability of this new attachment are lacking. Gingivectomy is less elaborate, does not imply a high-level sterile environment like for mucoperiosteal flap surgery, but leads to phonetic and esthetic side-effects when used in frontal areas. In the distal areas the apically displaced and the shortened repositioned flap techniques are effective in a long-term perspective if regular postoperative monitoring is respected. Discussion remains concerning the stability of a new connective tissue attachment vs. a long epithelial attachment. A recent breakthrough is the so-called Guided Tissue Regeneration where by means of a submucosally membrane the periodontal ligament cells are allowed to regenerate the different periodontal tissue compartments. Preliminary results are very encouraging but need further evaluation.

Dental Plaque↗
PubMed1985

[Fetal sinusoidal cardiac rhythm].

The authors describe a case of fetal sinusoidal cardiac rhythm which was observed during a feto-maternal transfusion. This type of cardiographic tracing is found similarly in certain cases of severe fetal anaemia or of isolated fetal hypoxia. It is also found in amnionitis and associated with various iatrogenic factors such as the administration of general anaesthesia and fetoscopy. The literature does not show a consensus when trying to find the criteria for defining this type of rhythm. The aetiology of the pathological condition is much in dispute. The prognosis does not have to be all that serious. In conclusion, the authors suggest the attitude of management to lessen the poor prognosis of these sinusoidal rhythms and help towards a favourable outcome.

Arrhythmia, Sinus↗
PubMed1984

[Pulmonary hypoplasia. Apropos of a case in twins].

The authors report an unusual case of major lung hypoplasia in both of twins without any other associated malformations. This case has given an opportunity to make a hypothesis on the aetiology and pathogenesis in order to try to explain the pathology and better to appreciate fetal respiratory function.

Adult↗