摘要:

Abstract –Histopathologic and clinical reexamination of 84 cases diagnosed as peripheral odontogenic fibroma showed 56 cases with no evidence of recurrence, 12 with possible single recurrence and 16 with verified single or multiple recurrences. An effort was made to correlate the histopathologic appearance with the recurrence rate. Three different types of lesions could be identified: fibrous epulis, calcifying fibroblastic granuloma and various types of “fibroma”, all showing a high recurrence rate. Our findings show that neither histomorphology nor recurrence rate can be used as a definite criterium to separate neoplasia such as odontogenic fibroma from other gingival fibrous overgr

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00781.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Nuva Seal® replicas of pits and fissures from surgically removed unerupted human third molars and premolars, and from erupted premolars extracted for orthodontic reasons, were examined in the scanning electron microscope. The results confirm that the morphology on occlusal surfaces of third molars is extremely variable with numerous pits of considerable length positioned at various angles relative to the fissures. In contrast, the morphology of unerupted and erupted premolars is simpler with fewer and shorter pits positioned perpendicular to the fissure. It is pointed out that line details of the morphology are lost when reconstructions of the occlusal morphology are made from serial ground sections. However, such reconstructions seem to be less reliable in third molars than in premola

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00782.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Effect of applications of a sodium fluoride varnish, Duraphat®, on progress of initial caries lesions was studied in 11–13‐year‐old children. All 60 children included in the study had high caries activity and life‐long exposure to fluoridated drinking water. The varnish was applied semiannually using the half mouth technique, and annual clinical and radiographic examinations were made for 3 years. The treatment had little effect on the progress of initial caries lesions present before the first application of varnish. The progress of caries lesions formed during the study was inhibited more distinctly, and the difference between test and control side in the rate of progress of caries lesions was highly statistically significant. Use of fluoride varnish seems to help to prevent further development of early cari

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00783.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –The coronal dentin of red deer (Cervus elaphus L.) was studied by light microscopy and microradiography. The material consisted of incisors from 10 animals, 2½–6½ years of age. Sections in the long axes of the crowns in the buccolingual and mesiodistal planes were prepared, as well as transverse sections. A few crowns were also examined in toto. A system of giant tubules of the same type as in human dentin is described. It was, however, characterized by more regularity in the number and the morphology of the tubules. As in human dentin, the giant tubules extended from the border of the pulpal cavity and could be followed, though not continuously, through secondary and primary dentin almost to the incisal dentinoenamel junction. Up to 60 giant tubules could be counted in the mesiodistal axis of the dentin. Contrary to the situation in man, areas of interglobular dentin were abundant in the c

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00784.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Previously described giant tubules in human and red deer coronal dentin have been subjected to a study by polarized light microscopy. Structure of the giant tubules was similar in both species. The lumen of each tubule was bordered by a 5–15‐μm‐thick collagenous mantle in which the fibers were orientated parallel to its long axis. In a circular dentin area encompassing the mantle, the course of the collagen fibers might be characterized as a winding of fibers around the cylindrical mantle. This structure of the giant tubules conforms with that described earlier in the rudimentary maxillary canine of a red deer. Thus, such tubules do not represent a rare anomaly, but occur regularly in both human and red deer corona

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00785.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Glucosyltransferase (GTF) adsorbed to hydroxyapatite and to saliva coated hydroxyapatite in vitro. Several proteins which are known to be present in the “pellicle” which forms on hydroxyapatite when this mineral is exposed to whole saliva were shown to stimulate or inhibit GTF. It is suggested that these proteins may interact with GTF and cause binding of the enzyme to saliva coated hydroxyapatite. A model is suggested where GTF adsorbed to tooth surfaces may induce binding of microorganisms to tooth sur

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00786.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –90 weanling Osborne‐Mendel rats were divided into six groups of 15 animals each. Half of them received a modified MIT 200 control diet in which one third of the sucrose of the original formula was replaced by high‐extraction wheat flour, magnesium content reduced to 360 parts/106and phosphorus content increased with NaH2PO42H2O to 0.49%. For the experimental diet, an additive containing 75 parts/106fluoride (as NaF) and 50 parts/106magnesium (as MgO) was mixed into the above composition. Each diet was given to three experimental or three control groups for 25, 40, or 55d. Caries involving dentin‐enamel junction was significantly reduced through the F + Mg addition by 37%, 51%, and 61% on the 25th, 40th, and 55th day, respectively. Caries involving dentin was significantly reduced by 58%, 68%, and 70%, respectively. Caries arrestment was observable in both the control rats and rats fed the F + Mg additive but in the latter animals the reduction meant an arrestment at a lower level than in controls. This arrestment resembles an early caries arrestment obtained recently in a clinical trial by fluoridation of dietary sugar products. The growth of the animals was only temporarily retarded by the ad

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00787.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Mouthrinsing with SnF2reduced the Streptococcus mutans population in plaque and saliva and the proportion of Streptococcus sanguis in plaque. The effect was of short duration: 2 weeks after treatment the values of S. mutans in plaque and saliva were even higher than the pretreatment values. Topical SnF2applications reduced the S. mutans population in plaque and saliva but did not reduce the proportion of S. sanguis in plaque. The eflect was more prolonged: 4 weeks after treatment the S. mutans population in interproximal plaque remained significantly reduced and the salivary levels of the organism had not fully returned to pretreatment levels. Both SnF2treatments significantly increased the salivary levels of lactobacilli. The values of laclobacilli in saliva remained signilicantly increased 4 weeks after the SnF2mouthrinsing but had almost returned to pretreatment levels within 2 weeks after the topical SnF2applications. The findings suggest that the cariogenic potential of dental plaque is differently affected depending on whether a drug is administered as a mouthrinse or is applied topicall

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00788.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –The Cu concentration as well as the Ca, Mg, Fe, Pb, Zn, and F concentrations were determined in subgingival calculus and the relation of Cu to Zn, Ca, Mg and Fe described. Samples of human subgingival calculus of 60 pieces from 60 subjects were ashed in an acid solution and the cation concentrations were determined with atomic absorption spectrophotometry. The F content was analyzed with an ion‐selective electrode. The data was analyzed using the multiple linear regression analysis. The mean ±SD of the Cu concentration in the subgingival calculus was 48.4 ±59.0 μg/g. Four elements, Zn, Ca, Fe and Mg, explained 41.1% of the Cu content. Zn explained 25.5% and the correlation was positive, whereas Ca (10.4%) had a negative correlation with the Cu content. The results showed such a high Cu content that it could affect the mineralization of ca

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00789.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

Abstract –Quantitative cultural studies of yeasts and bacteria were made from 7‐day‐old denture plaque accumulated on pieces of self‐adhesive tape stuck on the fitting surface of the maxillary denture in 17 edentulous subjects with healthy oral mucosa and in 27 patients affected with denture‐induced stomatitis. Significantly higher numbers of yeasts and bacteria were cultured in the stomatitis patients than in the controls. This indicates that the rate of plaque formation is increased in patients with denture‐induced stomatitis. Yeasts usually constituted less than 1% of the anaerobic bacterial counts, but the percentage of yeasts was significantly higher in the stomatitis patients than in the controls. There was a significant correlation between initially high yeast counts and improvement of the clinical condition of the palatal mucosa following antimycotic treatment. In some patients only bacteria were grown and antimycotic treatment had no effect. The study supported the contention that yeast antigens and toxins of denture plaque are significant factors in initiation and maintenance of denture‐induced stomatitis. However, bacteria may also be involved

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1983.tb00790.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY