[Retrospective analysis of the risk factors in patients with ischaemic heart disease hospitalized in the years 1983-1992].

Purpose: The aim of this study was to perform a retrospective analysis of selected risk factors and their variability in a 10 years period of observation in patients with ischemic heart disease (IHD).

Material And Methods: We reviewed 5219 questionares of patients hospitalized at internal wards of the Internal Medicine Institute of the Pomeranian Medical University in Szczecin. Among the participants 1709 were females with mean age 56.

[Effect of 10-15% carbamide peroxide on enamel fluoride concentration in vital bleached teeth].

The objective of the study was to evaluate the concentration of fluoride in human enamel before and after bleaching using 10-15% carbamide peroxide and after application of the fluoride varnish. Microsamples of enamel were collected using acid biopsy and the concentration of fluoride in the superficial and underlying layer was assayed. No significant differences were observed in the concentration of fluoride in both layers of enamel before and after bleaching as well as after varnish application.