Biomedical subjects

P Torell

Publications and source records attributed to P Torell.

At least 19 recordsLinked to original sources

PubMed1992

Caries experience in teenagers related to changes in a dental health programme.

Comparisons were made of the number of approximal DF-surfaces radiographically recorded at the ages of 13 and 16 years between two groups of children, born in 1964 and 1971, respectively. The aim of the study was to examine if the differences in caries prevalence could be related to the effects of the changes in the dental health programme with time in Göteborg, Sweden. The caries prevalence at 16 years of age was significantly lower in the 1971 group. This was mainly due to a decrease in the number of fillings and caries lesions in girls. However, no statistically significant differences were found between the groups with regard to the mesial surfaces of the first permanent molars. In comparisons between the 20 per cent of children of both sexes with most caries, the 1971 group presented significantly lower DF-values at 16 years of age. The children in the 1971 group had a lower age at the start of organized dental care, had had more topical fluoride applications and, especially the girls, had probably used fluoride dentifrices more frequently. These factors, taken singly as well as in combination, are presumed to have contributed to the lower caries prevalence in the 1971 group.

Adolescent↗

PubMed1990

The time employed for care of permanent teeth in children and adolescents.

Data were compiled from the records of dental care given to 199 patients from 6 to 19 years of age. The restorative treatment of permanent teeth, including the time for examinations, radiographs and final polishing, accounted for 74% of the total time employed for dental care. It was especially noted that the youths with a caries prevalence of 25 or more filled surfaces at 19 years of age, constituting 24% of the patients, accounted for 65% of the number of filled proximal surfaces and 45% of all filled surfaces, while 38% of the time needed for restorative dentistry and 40% of the time used for individual prophylaxis was associated with this group. This study emphasizes the importance of early identification of the children at high risk for caries so as to provide appropriate preventive therapy.

Adolescent↗

PubMed1989

Effect of different carriers preventive measures in children highly infected with mutans streptococci.

The caries preventive effect of topical application of fluoride varnish (Duraphat), ferric-aluminum-fluoride solution (FeAlF) and chlorhexidine gel was compared in 2-yr clinical study. Children with more than 10(6) mutans steptococci per ml saliva were selected and a total of 189 13-yr-old children participated in the study. The children in the fluoride groups were treated every third month with either Duraphat or FeAlF-solution. In the chlorhexidine group children with more than 2.5 x 10(5) mutans streptococci per ml of saliva were treated every third month. The mean number of new decayed and filled tooth surfaces was 3.06 in the chlorhexidine group, 5.88 in the Duraphat group, 5.33 in the FeAlF group, and 6.34 in the control group. Thus supervised antimicrobial treatment can significantly reduce the incidence of dental (caries) in children with high numbers of mutans streptococci.

Adolescent↗

PubMed1988

Iron and dental caries.

Studies of human and animal caries, experiments in vitro and laboratory reports initiated the present study of a possible caries preventing effect of iron. The study comprises two sections. (I) Coatings on teeth of hamsters treated with iron salts and films formed on various solutions containing ferrous ions were examined with scanning electron microscopy and x-ray fluorescence analysis. (II) Enamel surface layers, remineralized caries lesions, fluorosed rat bone, coatings on teeth of hamsters treated with iron salts and films formed on solutions containing ferrous ions were examined with transmitting electron microscopy and electron diffraction. Based on the findings the following effects were visualized. When brought into the mouth, even in small amounts, iron ions will be precipitated on the enamel surface as thin acid resistant coatings containing gels and crystals of hydrous iron oxides. In addition, by adsorbing salivary calcium and phosphate ions these iron compounds seem to be able to nucleate the formation of apatites, thus mediating a replacement of minerals, which have been dissolved during the acid phases of the caries process.

Animals↗

PubMed1983

Fortnightly fluoride rinsing combined with topical paintings with a fluoride solution containing Fe- and Al-ions.

In clinical trials conducted for three and five years respectively the combined effect of fortnightly sodium fluoride rinsing and topical painting every fourth month with a ferric aluminum fluoride solution was found to be significantly more caries preventing than the combined effect of fortnightly sodium fluoride rinsing and topical painting every fourth month with a neutral 0.2% sodium fluoride solution.

Aluminum↗

PubMed1980