Abstract:
:Using the performance criterion of "success time" it has been possible to investigate in detail the changing efficiency of the amalgamation process as both capsule length and amplitude of oscillation are varied. The most efficient amalgamation was obtained for a length:amplitude ratio between 0.5 and 1.3 over a range of amplitudes. There is, however, an apparent upper limit to the amplitude which may be used without a loss in efficiency due to other factors becoming important. The nature of the relationship for the principal success region has been investigated theoretically, which result has been supported by the empirical observations. The ratio pi/2 corresponds closely to a minimum efficiency. It would seem that, because of the complexity of the precise calculation of the theoretical optimum, empirical determination would be the method of choice in any given system. However, there is satisfactory agreement between the theoretical approximately optimum ratio of 0.5 for l/1 and the observed minima in the range 0.4-0.7 for l/2.
journal_name
Aust Dent Jjournal_title
Australian dental journalauthors
Darvell BWdoi
10.1111/j.1834-7819.1980.tb03890.xsubject
Has Abstractpub_date
1980-12-01 00:00:00pages
325-32issue
6eissn
0045-0421issn
1834-7819journal_volume
25pub_type
杂志文章abstract:BACKGROUND:Homeless people experience a much higher burden of general health conditions and have much poorer oral health than the rest of the population. The aim of this study was to determine the oral health impacts and general quality of life of an urban homeless population. METHODS:A convenience sample of 58 adults...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12167
更新日期:2014-06-01 00:00:00
abstract::This article is a review of the recent literature pertaining to the oral sequelae of eating disorders (EDs). Dentists are recognized as being some of the first health care professionals to whom a previously undiagnosed eating disorder patient (EDP) may present. However, despite the prevalence (up to 4 per cent) of suc...
journal_title:Australian dental journal
pub_type: 杂志文章,评审
doi:10.1111/j.1834-7819.2005.tb00079.x
更新日期:2005-03-01 00:00:00
abstract::A study of 4,278 country and city kindergarten children living in South Australia showed 63 and 59 per cent received fluoride tablets at some time and 17 per cent received daily doses. Lower dmf scores were found in those taking fluoride tablets but of decreasing value in the older children. Where no fluoride was take...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1975.tb03507.x
更新日期:1975-02-01 00:00:00
abstract::The management of bisphosphonate associated osteonecrosis of the jaws (bisphosphonate associated ONJ) is emerging as a significant problem in the field of dentistry and oral and maxillofacial surgery. We present a case of a 55-year-old female taking oral bisphosphonates, steroids and immunosuppressant agents presentin...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2010.01240.x
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:Candida biofilm is a major cause of denture stomatitis. We aimed to compare the efficacy of low-molecular-weight chitosan solutions against Candida albicans biofilm on polymethyl methacrylate (PMMA) resin. METHODS:Various types of chitosan were tested for anti-Candida activity by broth dilution. Two types w...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12826
更新日期:2021-01-23 00:00:00
abstract:BACKGROUND:To photoelastically examine load transfer by unilateral distal extension removable partial dentures with supporting and retentive components made of the lower stiffness polyacetal resins. METHODS:A mandibular photoelastic model, with edentulous space distal to the right second premolar and missing the left ...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2008.01085.x
更新日期:2009-03-01 00:00:00
abstract::The discovery of a radiolucency within an unerupted tooth is a rare occurrence. One cause is external resorption. The clinical features, the histology, and the management of three cases are described. ...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1991.tb00805.x
更新日期:1991-02-01 00:00:00
abstract::The history of denture base materials and the accompanying development of impression techniques are traced from the earliest times to the present day (Part 1) as a prelude to a study (Part 2-4) of the various theories that have been advanced to explain retention of the base without mechanical support. These theories a...
journal_title:Australian dental journal
pub_type: 杂志文章,评审
doi:10.1111/j.1834-7819.1993.tb04760.x
更新日期:1993-12-01 00:00:00
abstract:BACKGROUND:Erosive tooth wear is a growing concern in clinical dentistry. Our aims were to assess the effect of Tooth Mousse (TM) in managing erosive dentine wear in vitro. METHODS:Opposing enamel and dentine specimens from 36 third molar teeth were worn under a load of 100 N for 75 000 cycles in electromechanical too...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2009.01101.x
更新日期:2009-06-01 00:00:00
abstract::Most patients prefer fixed dentures, even in the presence of uni and bilateral free-end saddle. The most suitable treatment for this is an implant or implant-supported prosthetic restoration. A combined prosthetic and orthodontic treatment with distalization of a posterior tooth towards the edentulous region is an alt...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2006.tb00454.x
更新日期:2006-12-01 00:00:00
abstract::Previous work has shown that variations exist amongst general dental practitioners in the volume and type of orthodontic services provided, the type of orthodontic appliances used, and the objectives of the orthodontic treatment. The aims of this survey were to identify practitioner characteristics that account for va...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1995.tb04833.x
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Continuing education (CE) is an essential professional activity. In the last decade, CE has been actively pursued by the medical profession in Australia and abroad. However, the uptake of CE in dentistry has been much slower and there is minimal Australian data on dental CE. METHODS:To determine the level o...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2001.tb00569.x
更新日期:2001-06-01 00:00:00
abstract::Three series of standard tensile test specimens were produced using the nickel-base Ticonium Premium 100 alloy cast into a gypsum-bonded investment. For the first series an average weight metal ingot was used and cast at the temperature determined by the sensing head of the casting machine. For the second series a la...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1976.tb02845.x
更新日期:1976-04-01 00:00:00
abstract::The efficacy of a non-steroidal anti-inflammatory agent, ibuprofen, was evaluated in pain control following periodontal surgery. This type of agent acts peripherally by inhibiting the release of prostaglandins and minimizing the local inflammatory response. Thus there may be an advantage in pre-treatment administratio...
journal_title:Australian dental journal
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1834-7819.1997.tb00139.x
更新日期:1997-10-01 00:00:00
abstract:BACKGROUND:The erosive potential of wine on teeth may be modified by the buffering capacity of saliva. This potential effect was studied for three different wines in vitro and in vivo. METHODS:The buffering capacity was studied in vitro by stepwise addition of small volumes of a dry white wine, a medium sweet white wi...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2009.01124.x
更新日期:2009-09-01 00:00:00
abstract:BACKGROUND:Dens Invaginatus (DI), commonly known as dens in dente, is a developmental malformation of tooth that most commonly affects permanent maxillary lateral incisor teeth. Deciduous teeth are infrequently affected. Presence of DI in mandibular permanent teeth is extremely rare. Further, the presence of DI bilater...
journal_title:Australian dental journal
pub_type: 杂志文章,评审
doi:10.1111/j.1834-7819.2004.tb00056.x
更新日期:2004-06-01 00:00:00
abstract::Dental implants have been a routine part of dental practice for many years and are performed by a variety of practitioners with different backgrounds and training. This paper will outline the principles and practical surgical aspects of 'simple' implant placement against a background of our current understanding of th...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12588
更新日期:2018-03-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the associations of chewing and swallowing dysfunctions to nutritional status in older adults. METHODS:This cross-sectional study comprised a convenience sample of 1065 community-dwelling older adults living in rural United States. Dietary assessment included the Blo...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12064
更新日期:2013-06-01 00:00:00
abstract::In this the second of a series of life cycles of dental trauma victims, the short and particularly long-term responses of four survivors of either multiple luxation injuries or avulsions have been documented over periods varying up to 41 years. The development of ankylosis, either in the short or longer term post trau...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12430
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND:Little information is available regarding the bonding performance of adhesive restorative materials to caries-affected dentine after the use of Carisolv. The aim of this study was to compare the microtensile bond strengths of two resin-based adhesives, a conventional glass ionomer cement and resin modified g...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2003.tb00018.x
更新日期:2003-06-01 00:00:00
abstract::The necessary improvement of the bonding of denture teeth to the base resin has been hampered by inconsistent results and the consequent lack of clear guidance as to the best procedure to use. This state of affairs is in part due to poor experimental design. The tensile strength of notched planar interfaces between ac...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1995.tb04804.x
更新日期:1995-08-01 00:00:00
abstract::This review illustrates, through a series of case histories, how oral medicine insights aid the diagnosis and management of patients with excessive tooth wear. The cases reviewed are drawn from the records of 500 southeast Queensland patients referred to the author over a 12 year period. Patients most at risk of denta...
journal_title:Australian dental journal
pub_type: 杂志文章,评审
doi:10.1111/j.1834-7819.2001.tb00288.x
更新日期:2001-12-01 00:00:00
abstract::The National Study of Adult Oral Health (NSAOH) 2017-18 collected information from a sample of the Australian population aged 15 years and over. The Study comprised an interview questionnaire, completed by telephone or online, and an oral epidemiological examination among dentate participants. Participation in the Stu...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12759
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND:The aim of this study was to identify the nature and causes of deterioration and failure in dental handpiece ball bearings and thus provide guidance for clinical handling for service longevity. METHODS:The bearings of 36 turbine assemblies were dismantled for visual inspection, documented using a digital ca...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12112
更新日期:2013-12-01 00:00:00
abstract:BACKGROUND:This study compares diamond burs and curettes by clinical, microbiological, biochemical and scanning electron microscopic parameters and treatment time data in the non-surgical periodontal treatment of patients with chronic periodontitis. METHODS:Two quadrants of each of the 12 patients received root planin...
journal_title:Australian dental journal
pub_type: 杂志文章,随机对照试验
doi:10.1111/adj.12602
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Information on the timing and sequence of human tooth emergence is valuable when analysing human growth and development, predicting the age of individuals, and for understanding the effects of genetic and environmental influences on growth processes. This paper provides updated data on the timing and sequenc...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.2010.01230.x
更新日期:2010-09-01 00:00:00
abstract::Oral mucosal lichen planus (OMLP) is a well recognized mucosal disease with unknown aetiology. Considerable controversy exists as to whether OMLP is intrinsically premalignant, or if the disorder facilitates the development of oral mucosal squamous cell carcinoma (OMSCC) by external factors. The aim of the present stu...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1996.tb05919.x
更新日期:1996-04-01 00:00:00
abstract::The emphasis of Australian Government policy is on the promotion of good health in later life and positive experiences with ageing. Conceptually, a new gerontology framework has replaced the study of disease, decline, loss and disability. Within this framework, health promotion offers a mechanism by which individuals ...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/adj.12292
更新日期:2015-03-01 00:00:00
abstract::In this study, we report a very unusual case of a patient with osteomyelitis of the condyle secondary to pericoronitis of an impacted third molar. The patient was treated by removal of the impacted third molar, opening of the drainage, combined with systemic application of antibiotics for two weeks. This treatment opt...
journal_title:Australian dental journal
pub_type: 杂志文章,评审
doi:10.1111/adj.12186
更新日期:2014-09-01 00:00:00
abstract::A 27-year-old male suffered a fractured mandible following extraction of a tooth. It was subsequently found that the fracture occurred in an area pathologically weakened by a localized lesion of Langerhans cell disease. Since lesions of the jaws may be seen either as the first manifestation or as a complication of wid...
journal_title:Australian dental journal
pub_type: 杂志文章
doi:10.1111/j.1834-7819.1991.tb04725.x
更新日期:1991-12-01 00:00:00