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Biomedical subjects

H Luoma

Publications and source records attributed to H Luoma.

At least 73 records · Page 4Linked to original sources
PubMed1979

Effect of caries in mentally handicapped children of addition of fluoride and bicarbonate-phosphate to dietary sugar products.

Mentally handicapped children, aged 5--15 years and living in institutions, received fluoride supplement in several sugar products of their diet; in candies, marmalades, jams, fruit juices and in sweet desserts corresponding to 10 mg F as NaF per kg of the sugar (sucrose or glucose) of each product. To two of the four daily candies was also added a NaHCO3 + KH2PO4 mixture (mole ratio 9.8/l, resp.) to substitute for 2.5% of the sugar of the candy. The control children received the respective products without the additives. After stepwise exclusions of subjects for various reasons, e.g. for the absence of permanent teeth, low initial caries activity, strong medication, Down's syndrome, etc., the mean DMFS-increment in the remaining 43 control subjects was 4.5 and in the 41 test subjects 2.6 lesions/100 surfaces at risk, i.e. 42% reduction. Caries arrestment had occurred in these test subjects after the first year, while in the respective controls it was continuously increasing. Among numerous oral and body parameters studied, only surface enamel fluoride in primary teeth was increased by the fluoride supplements and urinary phosphate and calcium excretion decreased.

Adolescent↗
PubMed1978

Caries reduction over 5 years from a single application of a fissure sealant.

This paper is a continuation of three previously published papers giving a long-term clinical evaluation of an ultraviolet light polymerizable fissure sealant method. The present findings revealed that of the 156 permanent teeth available for study 5 years after initiation, 59.6% retained the sealants in good condition, while 25.6% of the sealants were missing or partly missing. During the test period, 37 (32.2%) of the 115 sealed permanent first molars had become carious, while 92 (80.0%) of the respective paired controls had decayed. An analysis of the efficacy of the treatment on the test-control tooth pairs showed a net gain of 55 and a percentage effectiveness of 59.8%. The sealed teeth were found to be highly significantly less decayed than the respective contols (P less than 0.001). Of the individual subjects, 73.4% were found to have benefited from the treatment.

Adhesiveness↗
PubMed1976

The effect of magnesium and fluoride on nephrocalcinosis and aortic calcification in rats given high sucrose diets with added phospnates.

The study was conducted to observe in rats the possible modification of ectopic calcification by magnesium-orthophosphate-fluoride combinations, used as additives of diet for reduction of the cariogenicity of the sucrose. In rats, fed low magnesium diets, extra dietary orthophosphate (2%) considerably elevated the calcification of kidneys. Further additions of magnesium and fluoride partially reduced this adverse effect of phosphate. While the calcium content of the aorta in rats, fed low magnesium-high phosphate diet, was considerably elevated, the further addition of magnesium (40 ppm) partially reduced the calcifying effect of phosphate in aorta. Fluoride (15 ppm) together with magnesium (40 ppm) completely reduced it. The appearance of renal calculi caused by a low magnesium diet or by extra phosphate were similar according to light and electron microscopy except for the larger size in the latter case and occasional extratubular calculi found in groups with high phosphate-low magnesium and high phosphate with added magnesium diets.

Animals↗
PubMed1975

Caries reduction 1.5 years after application of a fissure sealant as related to dietary habits.

Findings 1.5 years after the application of the sealant revealed that among the 200 sealed permanent first molars, 2.5% of the sealants were lost or partly missing, while 95% of the sealants remained in good condition. During the test period, 7 of the 200 sealed permanent fissures had become carious, while 64 of the respective control fissures had decayed. The percentage effectiveness of the prevention by the present method was 85%. Four out of five molars that had lost the sealants became carious, but of the 190 molars having sealants in good condition, only three were diagnosed as carious. All teeth reported as contaminated with saliva at the sealing session had lost the material. No correlation could be found between the type of food eaten or oral hygiene habits of the subjects and the retention of the sealants.

Child↗