Iain A. Pretty

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BACKGROUND To determine if a novel dual camera imaging system employing both polarized white light (PWL) and quantitative light induced fluorescence imaging (QLF) is appropriate for measuring enamel fluorosis in an epidemiological setting. The use of remote and objective scoring systems is of importance in fluorosis assessments due to the potential risk of(More)
OBJECTIVE To assess the reliability of the analysis stage of quantitative light-induced fluorescence (QLF). The QLF analysis involves subjective input from the user and this study examines the influence of this on the reproducibility of the QLF data. METHOD QLF images were taken of 20 human molar teeth that had been previously subjected to a(More)
This study compared the reliability of two methods used to produce computer-generated bitemark overlays with Adobe Photoshop (Adobe Systems Inc., San Jose, CA). Scanned images of twelve dental casts were sent to 30 examiners with different experience levels. Examiners were instructed to produce an overlay for each cast image based on the instructions(More)
Quantitative Light-induced Fluorescence (QLF) has been used to measure tooth stain in vitro; however the current analysis method cannot be used in vivo, as it requires regions of interest to be surrounded by unstained tissue. In this study, an algorithm was developed to detect stain on QLF images of teeth captured in vivo. It uses convex hulls to(More)
BACKGROUND Untreated caries in young children can result in a referral for extraction in hospital under general anaesthetic (GA). This study aims to explore the impact of caries during the ensuing wait for GA on children resident in the North West of England. METHODS The study involved 456 respondents referred to six hospitals in the Northwest of England.(More)
BACKGROUND The purpose of this study was to compare diagnostic performance for the detection of caries using photographs with an established visual examination method and histological sections as the reference standard. METHODS 50 extracted permanent teeth were assessed for the presence of occlusal caries by 9 examiners using two methods; traditional(More)
BACKGROUND Extensive caries in children can result in a referral for tooth extraction under General Anaesthesia (GA). While there are guidelines for the use of GA within paediatric dentistry this process is ultimately dependent upon the decision making of the treating dentist. This decision can be influenced locally by the availability of services and their(More)
BACKGROUND To determine the association between social deprivation and the prevalence of caries (including caries lesions restricted to enamel) and enamel fluorosis in areas that are served by either fluoridated or non-fluoridated drinking water using clinical scoring, remote blinded, photographic scoring for caries and fluorosis. The study also aimed to(More)
BACKGROUND Patterns of service delivery and the organisation of Dental General Anaesthesia (DGA) have been found to differ across hospitals. This paper reports on qualitative research aimed to understand the impact of such variation by exploring views and experiences of families receiving care in different hospital sites, as well as dentists involved in(More)
BACKGROUND To determine the severity of dental fluorosis in selected populations in Chiang Mai, Thailand with different exposures to fluoride and to explore possible risk indicators for dental fluorosis. METHODS Subjects were male and female lifetime residents aged 8-13 years. For each child the fluoride content of drinking and cooking water samples were(More)