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Biomedical subjects

E Beltrami

Publications and source records attributed to E Beltrami.

11 recordsLinked to original sources
PubMed1990

Scleroglucan sustained release oral preparations. Part II. Effects of additives.

Swelling and diffusion experiments, performed in vitro with tablets prepared with scleroglucan and several hydrophilic and hydrophobic additives, indicate that it is possible to modulate drug delivery from the matrix by appropriate choice of the nature and amount of the additive. The additives in the formulations may affect the mechanisms (zero order, diffusion, erosion) involved in the release of drugs from the dosage forms.

Chemistry, Pharmaceutical↗
PubMed1970

[Change].

Explore the source record for details and available documents.

Cybernetics↗
PubMedDate not supplied

[The effect of the exploratory probe on demineralized enamel].

This study aims to demonstrate the effect of dental explorer on demineralized enamel. Bovine teeth were divided perpedinculary towards their long axis. Each section were provided with 2 grooves, parallels to the teeth's axis. These sections were exposed to an acid solution for 7 days. After this period just one of the grooves of each section was probed ahd then, the demineralization was continued for one more wee. Then we could compare the lesions depths of demineralization of the probed grooves and the non probed grooves. The probed grooves presented an increased lost of enamel structure, more than the non probed grooves. It was concluded that the careless use of dental explorer on diagnosis of fissures caries cause mechanical damage to enamel already softened as a result of a carious attack.

Animals↗
PubMedDate not supplied

[Increased resistance to demineralization on enamel cavity walls by application of fluoride solution].

Dental enamel cavity walls of bovine extracted incisors were submitted to different treatments before to be "restored" with amalgam. The Group A non received treatment; the Group B received only a conventional cavity varnish and the Group C received a solution of sodium fluoride (2%) + conventional cavity varnish (2 applications). After 7 days of immersion in gel acid, the ground sections were studied in polarized microscope. The Group C that received sodium fluoride + conventional cavity varnish presented more resistance to demineralization. The Group B that received only cavity varnish presented a reduction in resistance to demineralization, and the Group A that non received treatment presented minor resistance to demineralization. Therefore, is emphasized the importance of application of sodium fluoride in cavity walls before lining with conventional cavity varnish and restoring with amalgam to obtain more resistance to demineralization.

Animals↗
PubMedDate not supplied

[Marginal leakage of composite resin and glass ionomer].

A study was developed to compare the marginal leakage by basic fuchsin dye, around cervical restorations after applying composite resin + dentin adhesive and composite resin + glass ionomer cement. Cervical cavities were prepared on the lingual and vestibular surfaces in 19 freshly extracted human teeth. The lingual cavities were restored with composite resin + dentin adhesive, and the vestibular cavities were restored with composite resin + glass ionomer cement ("Sandwich's" technique). After placement of each restoration, these teeth were thermocycled, immersed in dye solution. After removal from the dye, the teeth were sectioned through the restorations, along the long axis of the crown, and analyzed the leakage's degree. The composite resin + glass ionomer cement restorations, showed marginal leakage between the restorative material and the cervical margin but, generally since the middle of this wall.

Bicuspid↗
PubMedDate not supplied

[Definitive diagnosis of proximal caries by temporary separation of posterior teeth].

The authors present a review of diagnosis methods of approximal carious lesions and emphasises the necessity, in cases of incipient carious lesions, of using dental temporary separation to provide an inequivocal diagnosis. The temporary tooth separation offers preservation of dental structure and permits application of preventive and restorative procedures and monitoring incipient carious lesions. Selected methods of temporary dental separation are presented.

Bicuspid↗