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Biomedical subjects

R Eide

Publications and source records attributed to R Eide.

33 records · Page 2Linked to original sources
PubMed1990

Finishing and polishing glass-ionomer cements.

Four different methods for finishing and polishing the surfaces of two different glass-ionomer cements were studied by measuring the roughness of specimens at different stages of the procedures. Method 1 consisted of the four 3M Sof-Lex XT discs. Method 2 included a round, fine-grit diamond and the Vivadent polisher. In method 3 a round Arkansas stone and the Vivadent polisher were used. Method 4 comprised medium and fine sand and fine cuttle paper discs. Petroleum jelly was always used, to prevent heating and desiccation of the specimens. The cements used were KetacFil and KetacSilver. The smoothest surface was found after removal of the strip. The Sof-Lex medium disc gave the least rough surface for KetacFil, whereas the fine cuttle disc gave the smoothest finish for KetacSilver. Discs in sequence are to be preferred to diamonds and stones.

Analysis of Variance↗
PubMed1988

Finishing and polishing of composites.

Four different methods for finishing and polishing the surfaces of two different composite materials were studied by measuring the roughness of specimens at different stages of the procedures. Method 1 consisted of four different Shofu SuperSnap discs. Method 2 included the Shofu Dura-White stone, the Shofu CompoSite point, and the Vivadent polisher for composite resins. In method 3 the four 3M Sof-Lex XT discs were used. Method 4 comprised a green stone, a carbide finishing bur, and the Vivadent polisher for composite. All four methods were completed by using Kerr Command Ultrafine Lustre Paste. The composites used were Silux and P30. After the initial finishing, all four methods gave significant effect when used on the Silux, but on the P30 only methods 2, 3, and 4 gave a significant improvement. However, the degree of effectiveness of the methods varied greatly.

Bisphenol A-Glycidyl Methacrylate↗
PubMed1987

A comparison of different techniques for finishing and polishing amalgam.

Three different methods for finishing and polishing amalgam surfaces were studied by determining the roughness (Ra) of specimens at different stages of the procedures. Method I consisted of green stone, followed in sequence by finishing bur and pastes of pumice, powdered chalk, and SnO2. Method II was similar to method I but included brown and green Shofu polishers after the finishing bur. In method III medium and fine sandpaper and fine cuttle-paper discs were used before the pastes. A dramatic decrease in the Ra values was observed after the specimens had been ground with green stones, finishing burs, and sandpaper discs. Pumice resulted in a further reduction in Ra values. However, no significant differences in Ra values were found between the brown Shofu polisher, the fine cuttle-paper disc, and the different pastes. The lowest Ra value--that is, the highest smoothness--was obtained with green Shofu polisher.

Costs and Cost Analysis↗
PubMed1983

Sodium excretion and blood pressure in middle-aged men in the Sogn County: an intra- and interpopulation study.

Blood pressure (BP) and daily sodium excretion were measured in 262 males aged 35-54 years from three separate districts of the Sogn county in Norway. Averages for mean arterial pressure and sodium excretion were 103.4 mmHg and 192.4 mmol/24 h respectively, which is similar to the excretion rates in most other Western societies. Interpopulation (between groups) analysis revealed statistically significant differences in sodium excretion and BP between the three districts, but no significant correlation was found between individual sodium excretion rates and the respective BPs (within group analysis). The mean urinary sodium/potassium ratio (Na/K) was significantly lower in the district with the lower BP level, but there was no statistically significant correlation between individual Na/K ratios and BP. The lack of significant correlation between sodium excretion and BP in the within group analysis as opposed to the between groups comparison could be due to large intra-individual variation of sodium excretion.

Adult↗
PubMed1982

Relationship of psychosocial factors to bodily and psychological complaints in a population in Western Norway.

A sample of 915 men and women, representative of the population aged 35-49 in five municipalities in Western Norway, responded to a psychosocial questionnaire, the response rate being 78.8%. The questionnaire covered wide aspects of the life situation of the individuals as well as items on psychological and bodily complaints. Women had more complaints than men. By use of multiple regression, indexes of psychological and somatic complaints were predicted for men and women from psychosocial variables. For psychological complaints up to 37% of the variance was explained in women, and 45% in men. For bodily complaints the corresponding figures were 50 and 45%, respectively. In many cases an important intervening effect of the social network was demonstrated.

Adaptation, Psychological↗
PubMed1982

The effect of physical activity on emotional reactions, stress reactions and related physiological reactions.

Emotional reactions are bound up with physiological reactions. There are investigations which indicate that physical training may have an inhibiting effect on these physiological reactions and therefore also on the emotional reactions which may be associated with emotional stress. The best documentation refers to a favourable effect of physical activity on anxiety states. More research is necessary before it can be stated whether physical training has a positive effect on tolerance for stress and therefore can counteract the development of psychosomatic disorders.

Anxiety↗
PubMed1982

The relationship between body image, self-image and physical activity.

An individual's body image--how contented he is with his body--has a certain connection with the self-image, how the individual experiences and evaluates himself. A positive self-image is considered to be a sign of good mental health. Correlation studies, investigations of the effect of physical training programmes, and comparisons between physically active and passive groups suggest that physical activity can give the individual a more positive attitude to his own body and his own self-image, although not all investigations have given uniform results.

Body Image↗
PubMed1976

Physiological and behavioral reactions to repeated tail cooling in the white rat.

The purpose of the study was to examine a) the effect of local cooling on the metabolic rate, b) the effect of metabolic rate on the peripheral circulation, and c) acclimation to local cooling. After habituation to the experimental situation, 10 white rats had their tails exposed to ice water for 40 min/day for 37 days. Metabolic rate and tail temperature were measured. There was a conspicuous increase in oxygen consumption during the first 10 min of each cold exposure. This increase did not change significantly through the series. The metabolic rate during cooling was significantly reduced in the last half of the series. Tail temperature was significantly influenced by metabolic rate and increased significantly from the beginning of the series to the middle, and decreased from the middle to the end. Time of onset of the cold-induced vasodilatation decreased in the middle of the series and increased again at the end. These paradoxical findings are believed to be due to interplay between orienting reactions and habituation. It is pointed out that habituation may counteract acclimation.

Adaptation, Physiological↗