摘要:

AbstractThe periodontium is a complex anatomical site composed of a variety of hard and soft connective tissues. The site is subjected to enormous daily chemical and mechanical abuse, yet, for the most part remains relatively intact. Nonetheless, when breakdown does occur, the ability of the periodontium to regenerate is sometimes limited. This review considers the various components of the periodontium and how they might be involved in not only the pathology of periodontal diseases but also the various reparative and regenerative processes required during wound healing. In addition, the importance of external factors such as a variety of commonly prescribed medications on these events is discussed.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00720.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThis case report clearly demonstrates that mis‐diagnosis may result from failure to recognize the limitations dictated by the width of the focal trough in rotational panoramic radiographs. The patient's clinical signs and symptoms were at variance with the findings from the rotational panoramic radiograph. A subsequent radiographic view by the occipito‐mental (Water's) projection showed the extent and malignant features of the les

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00721.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractPeriostitis ossificans is a rare condition which has not been previously reported arising from an infected dentigerous cyst. This paper reports such a case in a twelve‐year‐old boy, and reviews the literature concerning periostitis ossific

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00722.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractA survey of 303 subjects over the age of 60 years collected demographic and oral health status data for analysis. The majority of the sample (64.2 per cent) were edentulous. Over 90 per cent of the dentate subjects required scaling and the removal of plaque (CPITN score of TN2); however, just less than half of the sextants examined were excluded because they contained fewer than two functional teeth. About one‐third of the dentate subjects required no treatment for dental caries. Of those who required treatment, most needed only one restoration of any particular type. Total tooth loss was associated with gender, level of education, previous occupation, and birthplace. The need for complex periodontal treatment (TN3) was not high, nor was there a high prevalence of root or cervical dental carie

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00723.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractVarious micro‐organisms have been implicated as causative agents for bacterial endocarditis, including lactobacilli and in particular the viridans streptococci which are more commonly associated with dental caries. Of these, the most frequently isolated one has the descriptive nameStreptococcus sanguis.The disease is characterized by growth of microorganisms within a platelet‐fibrin thrombus protruding from a valve leaflet. An understanding of the pathogenesis involves knowledge of the mechanisms of conversion of the normal vascular surface to a thrombogenic one and the adhesion of micro‐organisms to such surfaces. Model systems to study this interaction include experimental animals, mammalian epithelial cells and platelets, and proteins such as fibronectin and fibrinogen. Microbial protein surface components (adhesins) and lipoteichoic acid have also been implicated. Capsular polysaccharides may be involved, but the role of dextrans formed from sucrose has been overemphasized as the polymers are not formed insitu.Antibiotic prophylaxis for patients at risk is based on bacteriostatic or bactericidal action. However, bacterial cell surface components involved in adhesion may also be affected, and knowledge of such reactions could provide a more rational basis for antibiotic prophy

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00724.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractFrom 1984 to 1986, 97 similar pairs of Valiant‐PhD and Lojic N amalgam restorations were placed at random by one dentist in Class II cavities prepared in 105 molar and 89 premolar permanent teeth of 73 patients treated in a private practice. Assessments were made of the different handling properties of the two alloys and of the effects of polishing, or otherwise, on the clinical behaviour of the restorations. Valiant‐PhD alloy had more ‘body’ for condensing and was easier to carve and polish than was Lojic N alloy. After periods of up to four years, there was only one restoration failure (from bulk fracture) for each alloy although both materials deteriorated over time. Both the polished and the unpolished restorations showed similar deterioration for marginal fracture and staining, and for surface tarnish, and their initially‐different surface textures became more similar during the study. Statistically, Lojic N restorations showed significantly more surface tarnish, but less marginal fracture than did Valiant‐PhD restorations, and the tarnishing did not appear to be related to the effects o

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00725.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractEighty Class V non‐undercut cervical abrasion lesions were restored using four dentine bonding agents and composite resin. The restorations were examined over a three‐year period, and the cumulative loss rate calculated each year. Marginal staining at each year was assessed using a standardized photographic method. The loss rate of restorations increased generally over the three‐year period, reaching 30 to 60 per cent for the four products. Marginal staining also increased for all four products over the three‐year

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00726.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractPart 1 reviews published studies which relate to materials and techniques contributing to the dimensional accuracy of small dental castings. A brief history of thecire perdueor lost‐wax method of casting alloys and the development of modern dental casting materials and techniques are presented. Data on the behaviour of inlay wax, in particular its contraction and distortion, are reviewed as is the extensive literature about the casting shrinkage of gold alloys (Part 2) and the setting and thermal expansion of investments under both laboratory and practical conditions (Part 3). Part 4 discusses the role of the casting ring and its asbestos liner. Asbestos as a liner has now largely been replaced by two alternative materials, one based on cellulose and the other on ceramic fibres. The limited literature on the effect of these newer materials on casting accuracy is also reviewed, as their introduction may require significant changes in the traditional technology of dental castin

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00727.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThis report describes the use of theatre as a strategy for school dental health education. A play with messages relating to dental disease and its prevention was staged by school dental personnel for middle level primary schoolchildren. Feedback from the school staff indicated that the performance was well received and understood by the majority of the pupils. School dental personnel found that the awareness of dental disease and its prevention among their patients was generally more positive after the play. It thus appears that theatre is a useful medium for dental health education of young people.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00728.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1991.tb00729.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY