摘要:

The variation in lorus palatinus (TP) prevalence was investigated among a total of 2010 denial patients over 10 yr of age native to two different regions in Norway, the Lofoten Islands in northern Norway and the Gudbrandsdalen valley, an inland area in the southeastern part of the country. The two groups were presumed to belong to the same Caucasian stock, but were extremes with regard to the fish‐to‐meat ratio of the diet, which was 3:1 in Lofoten and 1:3 in Gudbrandsdalen, respectively representing a soft type of diet, and a tough type requiring greater muscular forces during mastication. The study revealed: 1) the prevalence of TP was higher among women than men; 2) TP seemed likely to arise from a multifactorial liability, with part of the genetic factors residing on the X chromosome; 3) the prevalence of TP appeared to be higher among natives of Lofoten, who consume the softer food, than among natives of Gudbrandsdalen, the higher prevalence being hypothesized to have some connection with nutrient substances present in saltwater fish, possibly Ω3 polyunsaturaled fatty acids and vitamin D; and 4) TP seemed to be a dynamic phenomenon capable of growth and subject to resorption remode

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01153.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Analysis of the concurrence of torus mandibularis and torus palatinus among a total of 2010 dental patients, by the test of independence, revealed that the concurrence was statistically significant among women, but not among men. A tentative hypothesis was proposed to explain the sexual dimorphism of the variable, combined occurrence of the two features.

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01154.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Mineral density of the cortical bone in four regions and the spongiosa distal from the mental foramen of the mandible was determined by quantitative computed tomography (QCT) for 77 postmenopausal, 48–56‐yr‐old women. Of these women, 42 were totally edentulous and 35 had teeth in region d35‐d45. The bone mineral densities of different regions of these two groups were compared. Mineral density of the cortical bone on lingual and buccal sides, distal from the mental foramen, was significantly higher among those who had been edentate 12–23.yr than among dentate subjects. No differences were found between those who had been edentate less than 12 or over 23 yr and the dentate group. This study indicates that muscular activity during different phases of edentulousness regulates the density of bone in regions where muscles are

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01155.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The diagnostic efficacies of three panoramic‐based indices were compared with classification of bone mineral density by dual‐energy x‐ray absorptiometry. The panoramic indices were 1) cortical bone height, 2) an ordinal classification, and 3) the Panoramic Mandibular Index. The results indicate that panoramic dental radiographs should not be used to assess the patient's status regarding osteoporosis, although the means of the variables in different mineral density groups of skeleton may differ signific

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01156.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The present study evaluated the ability of a light‐intensity tester (CL‐Tester) to predict the degree of conversion of a resin. A light‐curing resin was mixed from 25 mol‐% BISGMA and 75 mol‐% TEGDMA. The resin was cured with one of five different curing units whose light intensity varied from poor to very good when recorded with the CL‐Tester. The degree of conversion was found by determination of the number of remaining double bonds (RDB) from transmission infrared spectra of the resin. The five mean values of RDB varied with statistical significance. A significant linear correlation was found between recordings of the CL‐Tester and degree of conversion. It was concluded that the CL‐Tester was able to predict the degree of conversion to such a degree that it may be expected to constitute a useful means of regular control

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01157.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Male, adult Wistar rats were exposed to 500 μg/m3mercury vapor 6 h per day, 5 days a week for 4 wk. They were subsequently killed by transcardial perfusion. The molars were extracted, demineralized, and embedded in resin before section‐ing. Autometallographic development was performed according to the method of Danscher&Möller‐Madsen. Mercury deposits were found in small amounts in several areas of the pulp, but with larger accumulations of grains in relation to odontoblasts. Mercury also could be seen in odontoblastic processes in the dentin and predentin. Our conclusion is therefore that systemic uptake of mercury vapor leads to accumulation of mercury in the odontoblasts and that the mercury may be transported into the dentin tubules in the odontoblastic pr

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1994.tb01158.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY