摘要:

AbstractUse of the optimum finishing technique for an amalgam restoration may enhance the marginal integrity of the restoration and discourage its unnecessary early replacement.Two hundred and twenty‐eight high copper amalgam restorations in 56 patients were evaluated, using clinical assessment criteria, up to three years after placement. Each patient had received at least one carved‐only amalgam, at least one immediately finished restoration, and at least one amalgam that was polished at a subsequent appointment.Regardless of the finishing technique, the restorations exhibited similar marginal integrity up to three years after placement. Polished restorations were found to have substantially superior surface texture and less likelihood of surface discoloration. No evidence was found to support the use of immediate finishing techniques.The clinical significance of these findings, with respect to the need to polish amalgam restorations, is discus

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00757.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis paper documents the type, frequency and duration of complications associated with regional anaesthesia of the maxillary nerve via the greater palatine canal in a series of 101 patients treated in the Oral Surgery Department, United Dental Hospital of Sydney.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00758.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis study was conducted to evaluate the methods used for measuring the elastic recovery of various elastomeric impression materials. One brand from each chemical group was selected to allow relative ranking of the results from each deforming test mode.For compression tests, the polysulphide and silicone specimens made in metal moulds gave significantly less set than those made in acrylic moulds; this was not so for the polysiloxane and polyether specimens. For polysulphide and polyether materials, the set in compression was greater using the BSI balanced beam method than for an optical method without inertia or load effects; this was not so for silicone or polysiloxane materials. The elastic recovery of the materials did not alter significantly after ten minutes of strain release, except in tensile tests, where the elastic recovery continued to change for twenty minutes. The rank ordering of the deformation set showed a relative correlation for the compression test, a new tensile test method, and bend and torsion testing methods. Thus only one method is needed to determine set per cent.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00759.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe University of Sydney Dental School and more recently the Implant Centre have been treating patients with the Brånemark Osseointegration Implant System since 1981. Success depends on close cooperation between surgeon and prosthodontist. This paper describes specific prosthodontic treatment planning procedures based on a general knowledge of prosthodontics, and detailed methods for determining the position, length and alignments of the implants for a specific case by the use of radiographic and surgical templates

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00760.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractSeveral materials used in dentistry are described as biomaterials. Owing to the intimate contact of these materials with the oral tissues, they should possess a high degree of biocompatibility. However, some materials may exhibit adverse effects, causing both local and general pathological changes, even though the occurrence seems to be relatively low. It is, therefore, the dentist's responsibility to be aware of the potential adverse effects of these materials and to take precautions to protect the patient from such effects. The purpose of this article is to review the potential adverse effects of some commonly used restorative materials, mainly with regard to patients.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00761.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe purposes of this investigation were to evaluate and compare the antimicrobial effect of (1) twelve 0.4 per cent stannous fluoride (SnF2) commercial products and (2) different concentrations of SnF2(range = 0.02 to 3.28 per cent). The antibacterial inhibitory effect of various SnF2gels was evaluated as to their effectiveness against oral plaque bacteria including strains ofS. mutans, S. sanguis, S. sobrinus, A. viscosus, A. actinomycetemcomitans, andB. intermedius.When twelve different commercial preparations of 0.4 per cent SnF2were compared for inhibitory effect on plaque bacteria, several of the SnF2preparations were significantly more effective in inhibiting oral bacteria (p<0.05). With increasing concentration of SnF2, there was a comparable increase in the inhibitory effect on the oral bacteria tested (r2ranged from 0.867 to 0.996). SnF2at a concentration of 0.4 per cent had a similar antibacterial effect to 0.12 per cent chlorhexidine. Thisin vitrostudy demonstrated that certain SnF2products are highly effective in inhibiting the growth of bacteria often found in plaque, and this inhibitory effect is directly related to the concentration of the SnF2.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00762.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe problems associated with the grading of practical examinations are discussed and statistical analyses of two gradings are presented. Consideration is given to the difficulties of failing students who may wish to transfer to another faculty and a recommendation is made for the introduction of non‐graded passe

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00763.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis paper presents some information, derived by questionnaire, on the social characteristics and background of 1148 first‐year dental students at the University of Sydney for the years 1976–1985. Student entry age was 19.4 years; 27 per cent were female; 36 per cent of fathers and 24 per cent of mothers were professionals and 37 per cent of fathers and 11 per cent of mothers had attended university; parents of female students had higher educational levels than parents of male students; 55 per cent had medicine as the course of first preference. Eighty‐five per cent of students entered dentistry from high school with 78 per cent from Sydney.Characteristics of students showed little change over the period 1976–1985. Some changes noted were an increase in the number of female students with fewer living in their parents' home; increase in number of students from government schools; decrease in foreign students but an increase in students (Australian citizens, or residents) born overseas, and of different ethnic back

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00764.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractA national oral survey was conducted in Fiji in 1985/86. The results showed that the prevalence of caries was generally low and most commonly affected pit and fissure surfaces. Comparisons with previous surveys in 1948 and 1965 showed that the prevalence had fallen in primary teeth but remained relatively constant in permanent teeth. There were significant variations in prevalence between residential locations but not between ethnic groups. Periodontal disease was found to be a major public health problem. Except for the percentage of young children with caries‐free dentitions, the current status of oral health in Fiji was generally better than that proposed in the WHO goals for the year 2000. The training of dental hygienists to help in the prevention of both dental caries and periodontal disease is discusse

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00765.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis paper presents a detailed description of the construction of complete acrylic upper dentures reinforced with highly drawn linear polyethylene fibres. The work forms part of a continuing project to elucidate the properties and potential of the new system.

ISSN:0045-0421    

DOI:10.1111/j.1834-7819.1992.tb00766.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY