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Molar tooth buds of known aged baboon fetuses were removed and stained in alizarin red S. The sequences of cusp calcification and coalescences were studied in the deciduous molars. The cusp calcification sequence was similar in the baboon, rhesus monkey, and man; the coalescence pattern of the...
A mathematical model was developed to investigate the source and effect of bias in data from dental clinical trials when the status of some teeth is misclassified. Methods of obtaining unbiased estimates of the true attack rate and other parameters are suggested.
Adrenalectomized rats were given 0.5 mg or 1.0 mg of hydrocortisone acetate once daily for eight weeks. With increased hormonal doses, the dental caries activity and salivary glandular weights proportionally increased and decreased, respectively, as compared with adrenalectomized controls....
Lines of rats susceptible and resistant to dental caries were produced through 25 and 19 generations of breeding, respectively. Differences in mean caries time between the two lines were found to be as great as more than 500 days in some late generations. Heritability estimates yielded values of...
Electron photomicrographs were taken to examine and compare the structure of the properly heated soldered joints with that of the overheated joints. No diffusion of the solder was observed in the former group and considerable diffusion took place in the latter group. Pronounced oxide formation,...
The uptake of carrier-free 133 Ba by bone powder and anorganic bone equals or exceeds the uptakes of 47 Ca and 85 Sr. Bone matrix discriminates in favor of tracer Ba more than bone mineral does, although about 1% of the mineral surface shows a preferential uptake of 133 Ba compared with 47 Ca.
Standard differential microrespirometric technics have been employed to investigate the effect of bilateral adrenalectomy on the oxygen uptake of rat incisor pulp. A study of 76 experimental and 27 control rats indicated a 15.7% reduction in the oxygen uptake after the adrenal ablation.
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