Abstract:
OBJECTIVES:To test the hypothesis that a blue light emitting diode (LED) light curing unit (LCU) can produce an equal dental composite depth of cure to a halogen LCU adjusted to give an irradiance of 300 mWcm-2 and to characterise the LCU's light outputs. MATERIALS AND METHODS:Depth of cure for three popular composites was determined using a penetrometer. The Student's t test was used to analyse the depth of cure results. A power meter and a spectrometer measured the light output. RESULTS:The spectral distribution of the LCUs differed strongly. The irradiance for the LED and halogen LCUs were 290 mWcm-2 and 455 mWcm-2, when calculated from the scientific power meter measurements. The LED LCU cured all three dental composites to a significantly greater (P < 0.05) depth than the halogen LCU. CONCLUSIONS:An LED LCU with an irradiance 64% of a halogen LCU achieved a significantly greater depth of cure. The LCU's spectral distribution of emitted light should be considered in addition to irradiance as a performance indicator. LED LCUs may have a potential for use in dental practice because their performance does not significantly reduce with time as do conventional halogen LCUs.
journal_name
Br Dent Jjournal_title
British dental journalauthors
Mills RW,Jandt KD,Ashworth SHdoi
10.1038/sj.bdj.4800120subject
Has Abstractpub_date
1999-04-24 00:00:00pages
388-91issue
8eissn
0007-0610issn
1476-5373journal_volume
186pub_type
杂志文章abstract::In Zambia's population of 8 million, 69% are under 24 years of age. The country has a crippling foreign debt, and consequently public services are poorly funded. From March this year my wife and I have been working in Zambia. I have been asked to establish and develop a dental service based at Mukinge Hospital in the ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4807933
更新日期:1992-07-11 00:00:00
abstract:INTRODUCTION:Recent health promotion campaigns have encouraged the public to consume at least five portions of fruit and vegetables per day. Many see consuming fruit smoothies as a way of achieving this. OBJECTIVE:To ascertain the potential or otherwise for fruit smoothies to bring about dental erosion. DESIGN:Labora...
journal_title:British dental journal
pub_type: 评论,杂志文章
doi:10.1038/sj.bdj.2013.190
更新日期:2013-02-01 00:00:00
abstract::This series of articles is aimed at anybody who places crowns and other extra-coronal restorations (ie veneers and shims) on individual teeth. We hope that everyone from experienced practitioners to undergraduate students may find something of value. Whoever reads them, we would ask to do so with an open mind. We have...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4801317
更新日期:2002-02-09 00:00:00
abstract:AIM:To describe the characteristics of patients attending a psychologist-led cognitive behavioural therapy (CBT) service for individuals with dental phobia and the outcomes of treatment. METHOD:Analysis of routinely collected assessment and outcome data from 130 patients attending a single secondary service providing ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2015.890
更新日期:2015-11-27 00:00:00
abstract::Nick Ransford is a consultant in special care dentistry at Birmingham Community Healthcare NHS Trust. He has over 25 years' experience working with adults with disabilities and medical conditions across the spectrum. ...
journal_title:British dental journal
pub_type: 面试
doi:10.1038/sj.bdj.2014.154
更新日期:2014-03-01 00:00:00
abstract:OBJECTIVES:To investigate the composition of black tea in terms of its erosive potential. To determine the pH profile at the palatal surface of anterior and posterior sites of the dentition after drinking black tea. METHODS:Tea solution was analysed for its pH and anion composition to provide information on its acid c...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4800977
更新日期:2001-04-14 00:00:00
abstract:OBJECTIVES:To determine any differences in oral cancer risk factor awareness and behaviour among first and second generation Gujarati muslims and to investigate the impact of a community-based health education programme on oral cancer risk factor awareness. DESIGN:Respondents completed a confidential, bilingual questi...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2013.829
更新日期:2013-08-01 00:00:00
abstract::Within the BDS curriculum, dental public health and the importance of social responsibility is clearly emphasised though often in a didactic manner, without practical application. Preventative concepts are taught and relayed to individual patients being treated within a dental school. The impact of oral disease on gen...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2014.595
更新日期:2014-07-01 00:00:00
abstract::Methods of measuring the general magnitude or central tendency of sets of data are described, including the mean, median and mode. Similarly, methods of determining the degree of dispersion of the observations about the mean, including range, variance, and standard deviation are presented, together with worked practic...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4806727
更新日期:1989-02-11 00:00:00
abstract::The difference between paediatric dentistry and most other branches of dentistry is that in the child the occlusion is changing. Consequently 'Good Occlusal Practice' in children is a matter of making the right clinical decisions for the future occlusion. The clinician needs to be able to predict the influence that di...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4801261a
更新日期:2001-12-22 00:00:00
abstract::The regulation of cell growth is fundamental to the maintenance of health: disturbed regulation can result in neoplasia. Genes in normal cells (protooncogenes) code for proteins involved in the regulation of cell growth and differentiation; abnormalities in these genes (oncogenes) or their expression are often involve...
journal_title:British dental journal
pub_type: 杂志文章,评审
doi:10.1038/sj.bdj.4807936
更新日期:1992-07-25 00:00:00
abstract:OBJECTIVE:To determine the sensitivity of conventional sensory assessment in monitoring lingual nerve recovery subsequent to third molar surgery and to evaluate if the assessment methods can be predictive of injury outcome. METHOD:A prospective case series of 94 patients presenting with lingual nerve injuries evaluate...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4813584
更新日期:2006-05-27 00:00:00
abstract:UNLABELLED:There is significant evidence to support the regular review of patients with chronic periodontitis. There is, however, comparatively little evidence to demonstrate how often such reviews should take place. This paper looks at the periodontal healing period, the risks of periodontal progression and current th...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2011.868
更新日期:2011-10-21 00:00:00
abstract:BACKGROUND:Contemporary evidence for the effectiveness of water fluoridation schemes in the U.K. is sparse. The utility of routinely collected data in providing evidence warrants further research. OBJECTIVES:To examine inpatient hospital episodes statistics for dental extractions as an alternative population marker fo...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2014.180
更新日期:2014-03-01 00:00:00
abstract::The effect of filtration on water fluoride level was investigated in a study using commercially available filters. Testing was carried out in London (low fluoride), Braintree (optimum fluoride, naturally occurring) and Birmingham (optimum fluoride, artificially adjusted). It was found that none of the filters removed ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4809159
更新日期:1996-07-20 00:00:00
abstract:OBJECTIVES:To describe the type of patients seen and work undertaken by dental therapists employed in four personal dental service practices and to report on their cost-effectiveness within the context of the dental practice. METHOD:All members of the dental team used a standard day sheet to record all patient contact...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4811749
更新日期:2004-10-23 00:00:00
abstract::The British Orthodontic Society launched a campaign called 'Hold that smile' to highlight to patients the importance of wearing retainers as a means of reducing relapse following orthodontic treatment. This opinion piece, on behalf of the British Orthodontic Society, is written in response to an article entitled 'Brit...
journal_title:British dental journal
pub_type: 评论,杂志文章
doi:10.1038/sj.bdj.2018.439
更新日期:2018-06-22 00:00:00
abstract::This case report describes a metastatic bronchogenic deposit involving the lower lip and the adjacent bone in the lower incisor region. The presenting symptoms were very similar to those of a dentoalveolar infection and extraction of the lower incisor teeth failed to provide any relief. Comparison of radiographs taken...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4808197
更新日期:1993-06-19 00:00:00
abstract::Email is a computer based method of sending messages from one computer to another. From its humble beginnings 40 years, it has matured to become a crucial tool in utilising the power of the Internet. More people have access to email than to any other Internet application, and despite the problems with spam email and v...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/bdj.2007.271
更新日期:2007-04-14 00:00:00
abstract::The first diet of the Membership of the Faculty of Dental Surgery/Faculty of Dentistry (MFDS/MFD) examination took place on 15 September 1998. This article takes a look at the reasons behind the establishment of this new examination and describes the methods to be used in candidate assessment. ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4809798
更新日期:1998-09-26 00:00:00
abstract:OBJECTIVE:The aim of this study was to identify which local anaesthetic solutions were used by general dental practitioners in the United Kingdom and to determine selection criteria. In addition, differences in anaesthetic choice between recent graduates (< or = 5 years) and more experienced practitioners were investig...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.4813028
更新日期:2005-12-24 00:00:00
abstract::Treatment of the cavity with silver diamine fluoride before placement of glass ionomer cement containing CPP-ACP enhances anticariogenic effect in vitro. ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2017.580
更新日期:2017-07-07 00:00:00
abstract::Objectives The objectives of the prospective study were to establish the prevalence of distal caries (DC) in the mandibular second molar and to assess the outcomes of these diseased teeth in our population. Further aims were to identify associated risk factors and to design a protocol for prevention.Methods Clinical a...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2016.677
更新日期:2016-09-23 00:00:00
abstract::Introduction Invasive cervical resorption (ICR) has an unknown aetiology, yet it exhibits very aggressive behaviour compared with typical external root resorption, posing a high risk of tooth loss.Aim To investigate the number of patients at the Dublin Cleft Prosthodontic Department with an oro-facial cleft who experi...
journal_title:British dental journal
pub_type: 杂志文章,评审
doi:10.1038/sj.bdj.2017.405
更新日期:2017-05-12 00:00:00
abstract::There may be unintended changes to the occlusion following the provision of guards and splints. This article describes the management of anterior open bite as an unintentional, iatrogenic occlusal change in patients who have worn a night guard or occlusal splint and one case caused by an orthodontic retainer. ...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/s41415-019-0261-3
更新日期:2019-05-01 00:00:00
abstract::Enamel hypomineralisation is a qualitative defect, with reduced mineralisation resulting in discoloured enamel in a tooth of normal shape and size. Because the enamel is weaker, teeth can undergo post eruptive breakdown, resulting in missing enamel. Enamel hypoplasia is a quantitative defect of the enamel presenting a...
journal_title:British dental journal
pub_type: 杂志文章,评审
doi:10.1038/s41415-019-0782-9
更新日期:2019-10-01 00:00:00
abstract::The British Orthodontic Society (BOS) recently published a number of news articles aimed at drawing attention to its 'Hold that Smile' campaign which promotes lifelong retainer wear. The BOS's stated intention is to 'generate a viral #HoldthatSmile campaign in order to build awareness of its message that retainers are...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2018.227
更新日期:2018-04-13 00:00:00
abstract::Peri-implantitis has been described as progressive crestal bone loss around a dental implant. The condition is poorly understood, and is challenging to manage; it is commonly and widely attributed to issues with the implant, the implant surface, surgical technique and oral hygiene. The effect of prosthodontic stages o...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2017.755
更新日期:2017-09-08 00:00:00
abstract::The improvement of patient safety has been a long-term aim of healthcare organisations and following recent negative events within the UK, the focus on safety has rightly increased. For over twenty years, clinical audit has been the tool most frequently used to measure safety-related aspects of healthcare and when don...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2014.861
更新日期:2014-10-01 00:00:00
abstract::The oral rehabilitation of head and neck cancer patients is a vital and pivotal part of their care pathway, helping to restore function, aesthetics and improve patient well-being and quality of life. Patient-reported outcome data demonstrates that such patients consider that many of their continued and unmet needs rel...
journal_title:British dental journal
pub_type: 杂志文章
doi:10.1038/sj.bdj.2018.927
更新日期:2018-11-09 00:00:00