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Biomedical subjects

A Mocan

Publications and source records attributed to A Mocan.

16 recordsLinked to original sources
PubMed1997

Keratinization of palatal mucosa beneath metal-based removable partial and acrylic-based complete dentures compared with normal palatal mucosa: a clinical, cytological and histological study.

Normal human palatal epithelium is an orthokeratinizing tissue with a well-developed stratum corneum. Several cytological and histological studies showed that when the palate covered by a denture fully or partially, keratinization of the mucosa changes. The results of some studies suggested that keratinization changes from orthokeratosis to parakeratosis, and there is a reduction in the thickness of stratum corneum. Whereas the results of some other studies showed increased orthokeratinization. This study was planned to determine changes in keratinization of palatal mucosa in denture wearers compared with normal palatal mucosa. Keratinization of palatal mucosa was examined by mainly exfoliative cytology in three groups. Group-1 consisted of 51 patients wearing metal-based removable partial denture; group-2 consisted of 50 patients wearing acrylic-based complete denture and group-3 including 57 healthy volunteers who have not been wearing denture served as the controls. In each group, the results of exfoliative cytology were supported by histological examinations. Statistical results showed that either acrylic-based complete or cobalt-chromium-based removable partial dentures seem to reduce the quantity and/or quality of the keratin layer. The mean values of keratinization and the thickness of stratum corneum were significantly lower in the complete denture group than in the partial denture group. Furthermore the reliability of exfoliative cytology was confirmed by the guidance of histological examination.

Acrylic Resins↗
PubMed1996

Stereophotogrammetric and clinical evaluation of morbidity after removal of lower third molars by two different surgical techniques.

PURPOSE: This study compared swelling, pain, and trismus after using the conventional buccal approach and the lingual split technique for the removal of impacted third molars. MATERIALS AND METHODS: Twenty patients with a mean age of 21.5 years were included. Postoperative edema was followed stereophotogrammetrically for 48 hours by transferring photogrammetric data from three-dimensional profile views into orthographic maps. A visual analog scale was used for 6 days for determining pain. Mouth opening was measured on the 1st, 2nd, and 7th postoperative days. RESULTS: Maximal swelling was noted in both groups on the second postoperative day. In both groups, maximal trismus was noted on the first postoperative day. Approximately 98% of the measurements of interincisal distances had returned to the preoperative values by the 7th day. There was no significant difference in the pain intensity between the two groups on postoperative days 1 through 6. Swelling (P = .88) and pain (P = .12) were not significantly different in either groups. Trismus was found to be significantly less (P = .03) in the lingual split group. CONCLUSION: Although swelling and pain were comparable in both groups, the amount of trismus was less with the lingual split technique. This may be an advantage of the latter technique.

Adolescent↗
PubMed1990

[Retrospective research for intra osseous non-odontogenic cysts].

In this research, 483 cases of intra osseous cyst treated in the Maxillofacial Surgery department of A.U. Dental Faculty has been examined. Out of these cases 15 have been non-odontogenic jaw cysts with and without epithelium. In this group 5 were nasopalatinal, 2 were median mandibular, 2 were median palatinal, 1 was globulomaxillary, 4 were solitary and 1 was a bone cyst. Non odontogenic cases have been elevated according to the differing classifications.

Adult↗
PubMedDate not supplied

Relative bioavailability of different oral sustained release oxprenolol tablets.

The bioequivalence of oral dosage forms of oxprenolol was assessed in a triple crossover study on two groups of 12 volunteers each. Single 160 mg doses of oxprenolol hydrochloride were given after an overnight fast of either oxprenolol sustained-release tablets in a megaloporous system, a hydrophil matrix and Slow-Trasicor (Ciba-Geigy) in the first group, or floating slow-release tablets administered with food or in absence of food, and rapid release Oxprenolol (Terapia, Cluj-Napoca) tablets, in the second group. Serum oxprenolol concentrations were measured by a gas chromatographic method. Pharmacokinetic parameters which describe bioavailability and general kinetic behavior of the drug were calculated from individual serum profiles. They were subjected to statistical analysis (paired Student's t test, p < 0.05). The customary bioequivalence criterion was used: 0.8 < parameter ratio(tested/standard) < 1.2. Megaloporous tablets showed bioequivalence with the reference sustained release product Slow-Trasicor. Hydrophil tablets showed moderate sustained-release characteristics. Floating tablets showed significantly greater oxprenolol absorption when taken with food and were non-bioequivalent with floating tablets without food, as well as with the reference rapid release tablets, of oxprenolol. However, fasting tablets were bioequivalent to the Slow-Trasicor product, when taken with food.

Administration, Oral↗
PubMedDate not supplied

[The bioavailability of nifedipine in different solid pharmaceutical preparations for oral use].

The paper reports on the bioavailability of niphedipine in various pharmaceutic preparations administered in a single dose of 10 mg, per os, to volunteer subjects: Niphedipine dragees (Terapia, Cluj-Napoca), Adalat capsules (Bayer); Adalat coated tablets (Bayer and Birlaşik Alman Ilac Fabricalari, Istanbul) and Corinfar dragées (VEB Arzneimittelwerk, Dresden). In the blood samples collected, niphedipine was determined by a gas-chromatographic procedure. Pharmacokinetic analysis of the experimental data was made by a digital computer. Bioavailability of niphedipine was the best with Adalat capsules. The relative bioavailability of the other products was: tablets (Adalat); 93%; dragées (Niphedipine): 92%; dragées (Corinfar 86%). Absorption speed of Niphedipine decreases in the order: capsules, tablets, indigenous and imported dragées. Statistical analysis (Student test) shows that the differences in bioavailability among the preparations are not important. Efficiently therapeutic plasmatic concentrations are maintained for about 6 hours after a single dose of 10 mg administered as tablets and dragées and for 8 hours in the case of capsules. Important differences exist between the maximum concentration of niphedipine in blood, following some differences in the absorption speed, achieved after administration of capsules, on the one hand, and of tablets and dragées on the other hand. Choosing the type of tablet depends, therefore, on the nature of the affection treated. Niphedipine (Terapia) has corresponding biopharmaceutic properties and is useful in treating hypertension and for preventing and treating anginal attacks.

Administration, Oral↗