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Biomedical subjects

A Catalan

Publications and source records attributed to A Catalan.

13 recordsLinked to original sources
PubMed1989

The effect of three processing cycles on some physical and chemical properties of a heat-cured acrylic resin.

Samples were tested by following three processing methods: two processing cycles recommended by the manufacturer and quick violent boiling. Samples processed by following the recommended cycles showed statistically significant differences with regard to impact strength and Brinnel hardness, but without differences in the expected clinical behavior of the resin. Residual monomer ratio was higher when the boiling point was not reached, which seems to confirm the plasticizing effect of residual monomer. Samples were less brittle and less hard. Violent boiling increased porosity and lessened impact strength.

Acrylic Resins↗
PubMed1989

[Corrosion of a dental acrylic resin by alkaline peroxide used for cleaning].

Some clinical observations have brought the authors to suspect a corrosion of acrylic resins by an alcaline peroxide (Steradent) proposed as a denture cleanser. By way of a laboratory simulation they have shown that standardized samples of Lucitone 199 are corroded by the main active agents issuing from Steradent: oxygen and a high level of alcalinity. A daily use of Steradent can thus badly affect the physical properties of denture acrylic bases.

Acrylic Resins↗
PubMed1987

Denture plaque and palatal mucosa in denture stomatitis: scanning electron microscopic and microbiologic study.

Denture plaque is an etiologic factor in denture stomatitis. In this study, denture and mucosa samples from nine patients were examined in the SEM and processed for microbiologic cultures. Denture plaque in patients with denture stomatitis showed a considerable thickness containing cocci, filaments, rods, yeasts, and desquamated epithelial cells. Some microorganisms were revealed in the connective tissue in one patient and phagocytizing polymorphonuclear leukocytes were found in the palatal mucosa of the patients with denture stomatitis.

Bacteria↗
PubMed1983

[Role of Chlamydia trachomatis in the etiology of acute salpingitis. Value of the determination of IgG in 2 blood samples collected at 6 week intervals].

Cultures of specimens from the abdominal cavity (14) or the lower genital tract (11) were positive for Chlamydia trachomatis in 25 (22.7%) of 110 patients with a laparoscopic diagnosis of acute salpingitis. Microimmunofluorescence serodiagnosis showed positive IgG levels (greater than or equal to 1/64) in 35 patients (32%). Of the 34 patients in whom a second serodiagnosis was performed after 6 weeks, 20 (58%) had positive IgG levels (greater than or equal to 1/64) and 12 (35%) had a fourfold or more change in dilution. Thus, culture and serodiagnosis provided evidence of Chlamydia infection in 46% of the patient population. Forty-six patients were followed up for several months to evaluate the response to antibiotic therapy. Among tetracyclines, lymecycline was effective in 19/25 cases, doxycycline in 15/19 cases and minocycline in 2/4 cases. Switching to another tetracycline after failure of the first one usually gave satisfactory results.

Acute Disease↗