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Background In many countries, those with lower socioeconomic status are disproportionately affected by poor oral health. This can be attributed, at least in part, to differences in preventive dental visiting. While several theories have been applied to the area, they generally fail to capture the recursive nature of dental visiting behaviour, and fall short of informing the design of complex interventions to tackle inequalities. Objective To undertake a systematic review and synthesis of theory in order to provide an overview of the pathways which bring about socioeconomic inequalities in early dental visiting, and identify possible intervention points. Methods Electronic searching identified 8947 titles and abstracts. Paper screening and citation snowballing left 77 included papers. Drawing on the tenets of Critical Interpretive Synthesis, data extraction involved capturing concepts and relationships and translating these sometimes into synthetic constructs. Results We theorize that at the individual (micro-level), dental visiting behaviour is influenced by: the ' Importance of obtaining care', ' Emotional response' and ' Perceived control', which feed into a balancing of ' Competing Demands' against ' Internal resources' (coping, self-identity), although attendance is tempered by the effective ' Affordability and Availability of services'. Positive Care experiences are theorized to lower the demands and increase internal resources associated with dental visiting. We also outline meso-level factors ' Social norms and sanctions', 'Obligations, expectations and trust', 'Information channels', 'Social structures' and theorize how these can exert an overwhelming influence in deprived areas. Conclusions Socioeconomic inequalities in early dental visiting emerge from several stages in the care-seeking process. Dental visiting behaviour should be viewed not just as a one-off event, but extending over time and social space. Since there is recursivity in peoples' most recent dental experience any future visits we identify that interventions which make care a positive experience for low socioeconomic patients may be particularly beneficial in reducing inequalities. [ABSTRACT FROM AUTHOR]

Light nonaqueous phase liquid ( LNAPL) tracer testing is a technique used to directly measure LNAPL flow in situ and evaluate LNAPL mobility and recoverability. The test method consists of adding a fluorescent oil-soluble tracer to LNAPL within a well, isolating small volumes of LNAPL with known tracer concentrations for use as in-well calibration standards, and measuring the rate of tracer concentration decline in the well over time. The test measures LNAPL flux through the well, which is directly related to LNAPL mobility and recoverability in the surrounding formation. Test results for a total of 29 wells at five sites are presented. Results from LNAPL tracer testing were comparable to results obtained through other methods, and the method offers a time-averaged result measured over a relatively long period, in ambient conditions, and reflects the influences of heterogeneity and hydraulic changes. In some cases, tracer concentration decline followed unexpected patterns, and these data have led to a better understanding of test assumptions, mechanisms influencing tracer distribution, and options to improve test execution and data interpretation. Method improvements developed over the course of the field studies included refinement of pre-test screening of LNAPL fluorescence and improvements to measurement equipment. Overall, the field studies confirmed the technical validity and usefulness of the LNAPL tracing technique to support LNAPL mobility and recoverability assessments. [ABSTRACT FROM AUTHOR]

The article focuses on the prevention of type 2 diabetes in women who have had gestational diabetes mellitus (GDM). Topics include antenatal care of women with GDM, integration of guidelines recommending oral glucose tolerance test (OGTT) for women with GDM into postnatal visits to general practitioners (GPs), and the need for collaborative approach.