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Biomedical subjects

B Vernole

Publications and source records attributed to B Vernole.

At least 19 recordsLinked to original sources

[Handicapped patients. General anesthesia or sedation?].

The Authors consider the problems involved in dental treatment of the handicapped patients. Accuracy in diagnosis of the handicap factor, knowledge about its consequences on pathophysiological status and about chronically assumed drugs are the first step: in fact these patients may be affected by a wide variety of physiopathologic and mental diseases. Failure of cooperation requires general anesthesia or sedation techniques. General anesthesia can be dangerous (malignant hyperthermia in myopathies, difficult intubation in facial anomalies, pharmacological interactions); furthermore, its frequent application even in order to perform minimal treatment is often unsuitable. Sedation techniques offer a more convenient possibility, but must be practised by trained operators. Nitrous oxide alone rarely produces in fact a sufficient degree of sedation and is suitable only in patients affected by very slight mental insufficiency. In the other cases, association with various drugs (as benzodiazepines, barbiturates etc) is needed. In such a situation, the active and continuous presence of the anesthesiologist becomes mandatory.

Anesthesia, Dental↗

[Morphological research on the dental pulp of the calf].

Morphological researches have been carried out through histological studies with fine and semifine sections at the electronic scan microscope on the dental pulp of calves. The general aim was to identify the antioxidant properties of pulp and study cellular density and microfibrillar architecture. The dental pulps of calves of 5-6 months taken immediately after slaughtering were used with immersions into the fixing liquid. The scan microscope showed fibroblasts in the deepest regions of the pulp in a stroma of collagenic fibres, not organised but scattered among the cells of the connective tissue. The odontoblasts presented well ordered one beside the others with well visible details such as the swollen basal portion, the nucleus and a very tight villosity. No clear interodontoblastic connections were evident. The electron transmission microscope revealed typical cells with histiocyte appearance with microfilaments evident in the cytoplasma (myofibroblasts) presenting a wide variety of cytoplasmatic interconnections with interdigitations.

Animals↗

[Dimensional stability of impression materials studied with Talysurf 10].

The dimensional stability of certain modeling elastomers was investigated. In order to obtain a complete picture, 2 samples of each elastomer class on the market (polysulphuric, polyether, silicone additives, condensation silicone), a total of 8 products, were tested according to the criteria outlined in ADA 19. In contrast with ADA 19 recommendations, measurements were taken using a Talysurf 10, a roughness meter that can also check for straightness, which was chosen as being equally efficient as other methods while offering highly reliable objectively verifiable data.

Dental Impression Materials↗

[In vitro enamel fluoridation using an ultraviolet laser].

28 samples of human enamel have been studied in order to measure fluoride absorption after treatment with ultraviolet radiations. Samples treated with topical application only presented limited fluoride absorption in enamel surface (up to 0.5 microns deep). The absorption rate was higher, using an U.V. lamp. In samples treated with "excimer" laser, fluoride absorption was much higher in the surface layer and occurred also deeper (3 microns).

Absorption↗