The protective effect of CALD identity in the presence of low income on missing teeth of Australian adults over time.

BACKGROUND: 'Culturally And Linguistically Diverse (CALD)' populations have diverse languages, ethnic backgrounds, societal structures and religions. CALD populations have not experienced the same oral health benefits as non-CALD groups in Australia. However, the socio-demographic profile of Australian CALD populations is changing. This study examined how household income modifies the oral health of CALD and non-CALD adults in Australia. METHODS: Data were from two National Surveys of Adult Oral Health (NSAOH) conducted in 2004-06 (NSAOH 2004-06) and 2017-18 (NSAOH 2017-18). The outcome was self-reported number of missing teeth. CALD status was identified based on English not the primary language spoken at home and country of birth not being Australia. Social disadvantage was defined by total annual household income. Effect-measure modification was used to verify differences on effect sizes per strata of CALD status and household income. The presence of modification was indicated by Relative Excess Risk due to Interactions (RERIs). RESULTS: A total of 14,123 participants took part in NSAOH 2004-06. The proportion identifying as CALD was 11.7% and 56.7% were in the low-income group, and the mean number of missing teeth was 6.9. A total of 15,731 participants took part in NSAOH 2017-18. The proportion identifying as CALD was 18.5% and 38.0% were in the low-income group, and the mean number of missing teeth was 6.2. In multivariable modelling, the mean ratio (MR) for CALD participants with low household income in 2004-06 was 2% lower than the MR among non-CALD participants with high household income, with the RERI being - 0.23. Non-CALD participants from lower income households had a higher risk of having a higher number of missing teeth than low income CALD individuals (MR = 1.66, 95%CI 1.57-1.74 vs. MR = 1.43 95%CI 1.34-1.52, respectively). In 2017-18, the MR for CALD participants with low household income was 3% lower than the MR among non-CALD participants with high household income, with the RERI being - 0.11. Low income CALD participants had a lower risk of missing teeth compared to their non-CALD counterparts (MR = 1.43, 95% CI 1.34-1.52 vs. MR = 1.57, 95% CI 1.50-1.64). CONCLUSIONS: The negative RERI values indicate that the effect-measure modification operates in a negative direction, that is, there is a protective element to being CALD among low income groups with respect to mean number of missing teeth.

Psychosocial factors, dentist-patient relationships, and oral health-related quality of life: a structural equation modelling.

BACKGROUND: Psychosocial factors and dentist-patient relationships (DPR) have been suggested to be associated with oral health outcomes. This study aimed to test a conceptual model which hypothesised relationships among psychosocial factors, DPR variables, and oral health-related quality of life (OHRQoL) in the 'distal-to-proximal' framework. METHODS: A total of 12,245 adults aged 18 years or over living in South Australia were randomly sampled for the study. Data were collected from self-complete questionnaires in 2015-2016. The outcome variable of Oral Health Impact Profile was used to measure OHRQoL. Psychosocial domain consisted of psychological well-being, social support, and health self-efficacy. DPR domain included trust in dentists, satisfaction with dental care, and dental fear. The hypothesised model was tested using the two-step approach in structural equation modelling. RESULTS: Data were analysed from 3767 respondents after the screening/preparing process (adjusted valid response rate 37.4%). In the first step of the analysis, confirmatory factor analyses produced acceptable measurement models for each of the six latent variables (GFI = 0.95, CFI = 0.98, RMSEA = 0.04). The final structural model indicated that better well-being, higher self-efficacy, and more satisfaction were associated with lower oral health impact (ß = - 0.12, - 0.07, - 0.14, respectively) whereas fear was positively associated (ß = 0.19). Among intermediates, support was positively associated with satisfaction within a small effect size (ß = 0.06) as compared to self-efficacy with trust (ß = 0.22). The invariance of the final model was also confirmed on participants' SES and dental service characteristics except the variable of 'last dental visit'. CONCLUSIONS: Psychosocial factors and DPR variables were associated with oral health impact in both direct and indirect paths. The framework of 'distal-to-proximal' actions is empirically supported from psychosocial factors via DPR variables to OHRQoL.

Oral Health, Social and Emotional Well-Being, and Economic Costs: Protocol for the Second Australian National Child Oral Health Survey.

BACKGROUND: Given the significant investment of governments and families into the provision of child dental care services in Australia, continued population oral health surveillance through national oral health surveys is imperative. OBJECTIVE: The aims of this study are to conduct a second National Child Oral Health Survey (NCOHS-2) to (1) describe the prevalence, extent, and impact of oral diseases in contemporary Australian children; (2) evaluate changes in the prevalence and extent of oral diseases in the Australian child population and socioeconomic subgroups since the first National Child Oral Health Study (NCOHS-1) in 2012-2013; and (3) use economic modeling to evaluate the burden of child oral disease from the NCOHS-1 and NCOHS-2 and to estimate the cost-effectiveness of targeted programs for high-risk child groups. METHODS: The NCOHS-2 will closely mimic the NCOHS-1 in being a cross-sectional survey of a representative sample of Australian children aged 5-14 years. The survey will comprise oral epidemiological examinations and questionnaires to elucidate associations between dental disease in a range of outcomes, including social and emotional well-being. The information will be analyzed within the context of dental service organization and delivery at national and jurisdictional levels. Information from the NCOHS-1 and NCOHS-2 will be used to simulate oral disease and its economic burden using both health system and household costs of childhood oral health disease. RESULTS: Participant recruitment for the NCOHS-2 will commence in February 2024. The first results are expected to be submitted for publication 6 months after NCOHS-2 data collection has been completed. Thematic workshops with key partners and stakeholders will also occur at this time. CONCLUSIONS: Regular surveillance of child oral health at an Australian level facilitates timely policy and planning of each state and territory's dental public health sector. This is imperative to enable the most equitable distribution of scarce public monies, especially for socially disadvantaged children who bear the greatest dental disease burden. The last NCOHS was conducted in 2012-2014, meaning that these data need to be updated to better inform effective dental health policy and planning. The NCOHS-2 will enable more up-to-date estimates of dental disease prevalence and severity among Australian children, with cost-effective analysis being useful to determine the economic burden of poor child dental health on social and emotional well-being and other health indicators. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): PRR1-10.2196/52233.

Effect of Different Frequencies of Dental Visits on Dental Caries and Periodontal Disease: A Scoping Review.

Recommending dental visits every six months is commonplace among dental practitioners worldwide. A scoping review was conducted by electronically searching PubMed, Scopus and Embase to identify and map the nature of evidence for the effect of different frequencies of dental visits on dental caries and periodontal disease. Studies were written in English on the frequency of dental visits and published between January 2008 and April 2023. Three systematic reviews that evaluated the risk of bias, strength of studies and certainty of evidence were included from the 4537 articles yielded through the search strategy. The available evidence was weak and of low quality for the currently recommended frequencies of dental visits, whether these are fixed or universal. For adults, there was little to no effect of making biannual, biennial or risk-based dental visits on dental caries and periodontal disease, which was supported by moderate- to high-certainty evidence. Accordingly, it is suggested that dental professionals and dental insurance providers make individually tailored, customised and risk-based recommendations for dental visits, rather than encouraging fixed or universal frequencies of dental visits. For children and adolescents, further research on this issue warrants well-designed randomised controlled trials (RCTs) and cohort studies of sufficient duration with an adequate number of participants.

Oral Health Inequities among CALD and Non-CALD Older Australians: A Decomposition Analysis.

BACKGROUND: Among Australia's older population, the burden of oral disease is disproportionality borne by culturally and linguistically diverse (CALD) communities. This study aims to examine changes in untreated decay surfaces (DS) between 2004-2006 and 2017-2018 among older CALD and non-CALD Australians. METHODS: Data were sourced Australian national oral health surveys conducted in 2004-2006 and 2017-2018. An Oaxaca-Blinder decomposition analysis was used to assess the contribution of socio-demographics and dental behaviours. RESULTS: A total of 246 CALD and 2853 non-CALD dentate participants aged 60+ years took part in 2004-2006, and 363 and 4278 in 2017-2018, respectively. There were increases in mean DS for both CALD (0.74 to 1.42) and non-CALD (0.72 to 1.50) groups between 2004-2006 and 2017-2018. The decomposition model showed that, for CALD participants in 2004-2006 with untreated DS, 40% of the contribution was from not having dental insurance; nearly three-quarters of the contribution was from last dental visit being over one year ago (72.9%) in 2017-2018. Among non-CALD participants in 2017-2018 with untreated DS, 42.5% of the contribution was from the last dental visit being over one year ago. CONCLUSIONS: Our findings suggest that social determinants, including increased access to dental insurance, could mitigate the oral health inequities observed.

A longitudinal assessment of chronic periodontitis in Australian adults.

AIM: The study aimed to estimate the incidence/progression and reversal of chronic periodontitis and to identify factors associated with chronic periodontitis in Australian adults over a 12-year period. MATERIALS AND METHODS: Data were obtained from the longitudinal component of the National Study of Adult Oral Health (NSAOH) in 2004-2006, and repeated data, among the same adults, in 2017-2018. NSAOH 2004-2006 was a population-based study of Australian adults aged 15+ years. The American Academy of Periodontology/European Federation of Periodontology case definitions were used, and then compared with two other case definitions. Multivariable Poisson regression models were used to estimate incidence rate ratios (IRRs) and reversal rate ratio (RRRs) of periodontitis. RESULTS: A total of 775 dentate Australian adults had dental examinations at both times. The proportion of incidence/progression and reversal among Australian adults was 56.4% and 11.0%, respectively. Tobacco smokers presented with more than three times higher incidence (IRR: 3.32, 95% CI: 1.50-7.60) and lower reversals (RRR: 0.94, 95% CI: 0.39-0.98) than those who had never smoked. Cessation of smoking was positively associated with periodontitis reversal. The total incidence/progression was 471.7/10,000 person-years, with reversal being 107.5/10,000 person-years. The average number of teeth lost due to periodontal disease was 1.9 in 2017-2018. Being male and not having periodontal treatment were significant risk markers for the incidence/progression of periodontitis. CONCLUSION: Smoking is a risk factor for periodontitis. Cessation of smoking is an effective means of reducing the incidence and progression of chronic periodontitis, to reduce the risk of tooth loss, and to improve overall periodontal health.

A Longitudinal Study of Chronic Periodontitis in Two Cohorts of Community-Dwelling Elderly Australians.

Background: The study aimed to estimate and compare the incidence and progression of chronic periodontitis among two generations of older Australian adults. Methods: Data were from two population-based cohort studies of Australian older adults aged 60+ years South Australian Dental Longitudinal Studies (SADLS), SADLS I (1991-1992) and SADLS II (2013-2014). American Academy of Periodontology/the U.S. Centres for Disease Control and Prevention (CDC/AAP), and the 2018 European Federation of Periodontology classification (EFP/AAP) case definitions were used to define and calculate the incidence and progression of chronic periodontitis. Multivariable Poisson regression models were used to estimate incidence risk ratios (IRRs) of periodontitis. Results: A total 567 and 201 dentate respondents had periodontal exams in SADLS I and II, respectively. The incidence rate was greater in SADLS II than in SADLS I, approximately 200 vs. 100/1000 person years, respectively. Current smokers had more than two times higher IRRs, 2.38 (1.30-4.34) and 2.30 (1.24-4.26), than their non-smoking counterparts in the previous generation under the CDC/AAP and EFP/AAP, respectively. Conclusions: The most recent generation of older adults has greater incidence and progression of periodontitis than the previous generation. Being a current tobacco smoker was a significant risk factor for both the incidence and progression of periodontitis.

Prevalence, extent, and severity of periodontitis among Australian older adults: Comparison of two generations.

BACKGROUND: Chronic periodontitis is highly prevalent among older adults. The study aimed to compare periodontal disease among Australian older adults in two generations. We hypothesized that the prevalence and severity of periodontitis would decrease from the previous generation to the recent generation. METHODS: Data were obtained from the South Australian Dental Longitudinal Study (SADLS) in 1991 to 1992 (SADLS I) and 2013 to 2014 (SADLS II); population-based longitudinal surveys of Australian older adults aged ≥60 years. American Academy of Periodontology, the US Centers for Disease Control and Prevention (AAP/CDC), and the 2018 European Federation of Periodontology (EFP/AAP) classification case definitions were used to define and calculate prevalence of chronic periodontitis. Multivariable log-Poisson regression models were used to identify risk indicators for severe periodontitis after adjusting for other covariates. RESULTS: There were a total of 801 and 355 participants that underwent a periodontal exam in SADLS I and II, respectively. The prevalence of severe periodontitis was higher in the recent generation (88% and 56%) than the previous generation (75% and 46.7%) under the CDC/AAP and EFP/AAP case definitions, respectively. The mean number of missing teeth was lower in the recent generation (6) than the previous generation (13). The prevalence ratio of severe periodontitis was around two times higher in the younger age group, men, those not born in Australia, and current smokers across both generations. CONCLUSIONS: Our findings indicated that the recent generation of older adults has higher prevalence and severity of chronic periodontitis than the previous generation. Our findings indicated that aging, being male, born overseas, low household income, no dental insurance, and being a current smoker are significant risk factors associated with severe periodontitis among older Australians.

Oral Health of Australian Adults: Distribution and Time Trends of Dental Caries, Periodontal Disease and Tooth Loss.

This study was conducted to describe the distribution and trends in dental caries, periodontal disease and tooth loss in Australian adults based on the findings of the National Study of Adult Oral Health 2017-18. A cross-sectional study of a random sample of Australians aged 15+ years was carried out, employing a three-stage stratified probability sampling design. Data were collected via online survey/telephone interviews using a questionnaire to elicit self-reported information about oral health and related characteristics. Participants were then invited to have an oral examination, conducted by calibrated dental practitioners following a standardised protocol in public dental clinics. A total of 15,731 Australians aged 15+ years were interviewed, of which 5022 dentate participants were orally examined. Results showed that nearly one third of Australian adults had at least one tooth surface with untreated dental caries and, on average, 29.7 decayed, missing or filled tooth surfaces per person. Almost 29% of adults presented with gingivitis while the overall prevalence of periodontitis was 30.1%. Overall, 4% of adults were edentulous while, on average, 4.4 teeth were lost due to pathology. Poorer oral health was evident in Australians from lower socioeconomic backgrounds, indicating socioeconomic inequalities in oral health. Time trends revealed that dental caries experience and tooth retention of Australian adults has improved over 30 years, while periodontal health has deteriorated between 2004-06 and 2017-18. These findings can be used to assist policy makers in planning and implementing future oral healthcare programs.

Inequality in dental services: a scoping review on the role of access toward achieving universal health coverage in oral health.

BACKGROUND: Improving access to health services is a way towards achieving universal health coverage (UHC) in oral health. The purpose of this review was to map the determinants of access to dental services within a UHC framework. METHOD: Scoping review methods were adopted for the review. PUBMED, Scopus, ISI Web of Science and ProQuest were searched for academic literature on determinants of access to dental services in OCED countries. Articles published in the last 20 years were included. No restriction was placed on study methods; only articles in English language were included. Qualitative synthesis was conducted, along with a trend analysis and mapping exercise. RESULT: A total of 4320 articles were identified in the initial search; 57 articles were included in the qualitative synthesis. The results indicate 7 main themes as the determinants of access to dental services: family condition, cultural factors, health demands, affordability of services, availability of services, socio-environmental factors, geographical distance. Defined determinants of access to dental services, family condition, cultural factors and geographical access to dental services can fill the population axis of the UHC cube. Health demands and affordability of services fill the gap of financial protection as another axis of the UHC cube and finally, availability of dental services and socio-environmental factors are aligned with the appropriateness of services, the third axis of the UHC cube. CONCLUSION: According to the results, family condition and cultural, health demands, affordability and availability of services, social environment, and geographic factors can affect dental health access and equality. Socio-cultural determinations also need to be considered in applied planning. Addressing these factors to improve access to dental services can pave the way for achieving universal health coverage in oral health and should be considered in different levels of policymaking.

Inequalities in utilization and provision of dental services: a scoping review.

BACKGROUND: There are many determinants that can affect inequality in oral and dental health. This study is aimed to explore the main determinants of inequality in both utilization and provision of dental services in Organization for Economic Co-operation and Development (OECD) countries. METHODS: Four databases including PubMed, ISI WOS, Scopus, and ProQuest were searched up to 8 Aug 2020, applying the relevant keywords. Thematic analysis was used for synthesizing and extracting data. Trend analysis was applied to determine the trends of the inequality determinants. RESULTS: Thematic analysis led to 6 main themes, 13 sub-themes, and 53 sub-sub-themes. The main themes represent the main inequality determinants for both utilization and provision of dental services. The streamgraph illustrated that fewer studies have been conducted on social and cultural determinants, and for almost all determinants the trend of published articles has been increasing since 2007, with the exception of health policies. CONCLUSIONS: Inequality in the utilization and provision of dental services is addressed by various factors including individual, social, cultural and economic determinants, health policies, and availability of services. The first four determinants are related to utilization and the last two are related to the provision of services. All these aspects must be considered to reduce inequality in dental services.

Use of dental services among Australian adults in the National Study of Adult Oral Health (NSAOH) 2017-18.

BACKGROUND: This study examines last dental visit (visiting within the last 12 months, having a last visit 5 or more years ago, attending a private dental practice) and usual visit (usually visiting for a check-up, having a dentist they usually attend). METHODS: Explanatory variables include age, gender, region, income, area-based SES and dental insurance. The data were collected in the Interview in NSAOH 2017-18. RESULTS: There was a dental visiting gradient by region, with lower percentages visiting in the last 12 months in remote (44.9%) and regional areas (50.8%) than major cities (58.7%). A higher percentage of the higher-income tertile made visits (63.8%) than the middle (53.7%) and lower tertiles (49.9%). There was a visiting gradient by area-based SES, with higher percentages in the higher (63.8%) and middle SES tertiles (55.2%) than the lower tertile (50.2%). Uninsured persons had lower percentages visiting (43.3%) than insured (69.7%). CONCLUSIONS: Persons in remote locations, those with low socioeconomic status and those uninsured were disadvantaged in terms of access. They had lower percentages visiting in the last 12 months, usually visiting for a check-up, having a dentist they usually attend and higher percentages visiting 5 or more years ago.

Oral health impacts among Australian adults in the National Study of Adult Oral Health (NSAOH) 2017-18.

BACKGROUND: This paper examines oral health impacts of toothache experience, self-rated oral health (SROH), being uncomfortable with dental appearance, and avoiding foods in the Australian adult population. METHODS: The explanatory variables include age, sex, region, income, area-based SES, dental insurance and visiting pattern. The data were collected in the interview in NSAOH 2017-18. RESULTS: There were lower percentages with: toothache in the highest (14.8%) than middle (21.2%) and lower income tertiles (25.2%); fair/poor SROH in the highest (15.8%) than middle (24.1%) and lower tertiles (34.8%); uncomfortable with appearance in the highest (29.1%) than middle (35.3%) and lower tertiles (42.2%); and food avoidance in the higher (15.3%) than middle (22.9%) and lower tertiles (34.4%). There were higher percentages with: toothache in the unfavourable (32.2%) than intermediate (23.1%) and favourable (11.7%) visiting groups; fair/poor SROH in the unfavourable (44.0%) than intermediate (27.4%) or favourable (10.2%) groups; being uncomfortable about appearance in the unfavourable (47.6%) than intermediate (39.5%) or favourable (25.8%) groups; and avoiding foods in the unfavourable (34.8%) than intermediate (26.0%) or favourable (14.5%) groups. CONCLUSIONS: Socioeconomic status and dental visiting were associated with oral health impacts. Oral health impacts were worse for those with lower income and unfavourable visiting patterns.

National Study of Adult Oral Health 2017-18: participation and representativeness.

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 Study was voluntary and therefore relied on the goodwill of selected participants. This paper provides a summary of participation rates for the Interview and Examination phases of the study. The potential for biased population estimates due to variation in participation rates is explored. The weighting procedure implemented to ensure the sample is representative of the target population is described and a comparison of the estimated population distributions derived from the weighted sample and the actual population distributions is provided for a range of socioeconomic characteristics. In summary, it can be concluded that estimates derived from the weighted Interview and Examination samples are valid estimates of the Australian population aged 15 years and over.

National Study of Adult Oral Health 2017-18: Study design and methods.

The National Study of Adult Oral Health (NSAOH) is Australia's third national oral examination survey of a representative sample of Australian adults. The study was undertaken primarily to describe levels of oral health in the population and to describe trends since the first survey, conducted in 1987-88. The aim of the study was to complete 7,200 examinations, necessitating approximately 15,200 completed interviews. Survey participants were selected using a multi-stage probability sampling design that began with the sampling of postcodes within states/territories in Australia. Individuals within selected postcodes were then selected by the Australian Government Department of Human Services (DHS) from the Medicare database. Following an initial opt-out period, participants were given the option to either complete the questionnaire online or to complete the questionnaire via a computer-assisted telephone interview. Participants were asked a series of questions about their oral health and dental service use and those who reported having one or more of their own natural teeth were invited to undergo a standardised oral examination. Examinations were conducted by state/territory dental practitioners who underwent prior training and calibration in survey procedures by the Australian Research Centre for Population Oral Health (ARCPOH), The University of Adelaide.

Oral hygiene behaviours among Australian adults in the National Study of Adult Oral Health (NSAOH) 2017-18.

BACKGROUND: This paper examines oral hygiene behaviours (tooth brushing, mouthwash use and dental floss) by a range of explanatory variables. METHODS: Explanatory variables included age, sex, region, income, area-based SES, dental insurance and visiting pattern. The data reported were collected in the interview survey in NSAOH 2017-18. RESULTS: A higher percentage of females brushed with toothpaste at least daily (98.0%) and used floss in the last week (62.6%) than males (94.6% and 48.5% respectively). There was an income gradient in tooth brushing. Higher percentages brushed in the high income (96.8%) than middle (96.2%) and low-income tertiles (93.6%). A higher percentage of the high-income tertile (58.2%) flossed than the lower tertile (53.3%). Those with unfavourable visit patterns had lower percentages who brushed daily (92.7%) than the intermediate (96.7%) or favourable (98.2%) groups. There was a gradient in flossing by visiting, with a lower percentage flossing for the unfavourable visiting group (38.5%) than for the intermediate (52.8%) or favourable groups (67.6%). CONCLUSIONS: Oral hygiene behaviours were associated with gender, socioeconomic status and dental visiting. A higher percentage of women brushed and flossed than men. Lower socioeconomic status and those with unfavourable visiting patterns had lower frequencies of brushing and flossing.

Are trust and satisfaction similar in dental care settings?

OBJECTIVES: Trust and satisfaction in dental care settings are salient constructs to operationalize the concept of dentist-patient relationships (DPR). This study aimed to compare the similarity of both constructs with regard to factor structure and revise the scales for better psychometric properties. METHODS: Data analysed in the study were collected in self-complete questionnaires from a random sample of 4011 adults living in South Australia. Trust and satisfaction were assessed using the Dentist Trust Scale and the Dental Care Satisfaction scale. Items in the scales were initially examined with a split-half sample in exploratory factor analysis and cluster analysis. Factor structures of different model designs were tested on the other half sample in confirmatory factor analysis. The final model was cross-validated on the first half sample for structural invariance. RESULTS: Exploratory factor analysis revealed a three-factor structure consisting of 'trust', 'satisfaction' and 'distrust/dissatisfaction' (60.2% of the variance explained; Cronbach's α = 0.94, 0.81, 0.73, respectively). Cluster analysis supported the factor solution with the same three major clusters except for a single-item independent branch of the 'cost' domain from the satisfaction scale. The final model was designed with two correlated but distinct factors, 'trust' and 'satisfaction', with the modification of one inter-item covariance and deleting the least associated item (GFI = 0.96, CFI = 0.98, RMSEA = 0.06). The stability of the final model was achieved through cross-validation (P = .143, ∆CFI < 0.001). CONCLUSIONS: Trust and satisfaction in dental care settings are unidimensionally different yet highly correlated factors concurrently. Demonstrating the discriminant and complementary functions of both constructs can justify the rationale to apply them together in further studies for DPR.

Dentist-patient relationships and oral health impact in Australian adults.

OBJECTIVES: Dentist-patient relationships (DPRs) are a key component in clinical encounters with potential benefits for oral health outcomes. This study aimed to investigate whether better DPR variables are associated with higher oral health-related quality of life (OHRQoL). METHODS: A total of 12 245 adults aged 18 years or over were randomly sampled from South Australia in 2015-2016. Data were collected from self-complete questionnaires and analysed as a cross-sectional design. The outcome variable was the Oral Health Impact Profile (OHIP-14). Explanatory DPR variables included trust in dentists, satisfaction with dental care, and dental fear. Covariates comprising oral health behaviours, dental services, demographics, and socioeconomic status were included as potential confounding variables. Bivariate correlation analyses and multivariable linear regression were performed for the associations among explanatory, outcome variables and other covariates. RESULTS: Response data were analysed from 4220 participants (response rate = 41.9%). Unadjusted mean total scores of DPR variables and OHIP-14 were associated with most of the study participants' characteristics (P < .05). Bivariate correlations among DPR variables and OHIP-14 showed a diverse range of coefficients (|r| or |ρ|=0.22-0.67). Multivariable regression analyses in both individual/clustered block entry and full model indicated that higher satisfaction and less dental fear (B = -0.039 and 0.316, respectively in the full model) were associated with lower OHIP-14 after adjusting for possible confounders (P < .01). CONCLUSIONS: This study found that favourable DPR variables, mainly greater satisfaction and less dental fear are positively associated with better OHRQoL. Further studies are warranted to investigate the causality and mediation/moderation of DPR variables on oral health outcomes.

Trust in dentist-patient relationships: mapping the relevant concepts.

Trust has a central role in healthcare encounters. This review explored concepts relevant to trust in dentist-patient relationships. The findings were demonstrated by drawing visual system maps for better understanding of the inherent complexity. A pragmatic approach was employed to search for evidence. The approach was initiated with a systematised searching protocol and followed by an iterative process of drawing maps and complementing references. The analysis-synthesis process found relevant key concepts and sub-concepts presented within three frameworks: the continuum of studying trust (utilisation, measurement, and establishment); beneficiaries of trust utilisation (patients, dentists, and oral health system); and a transformational model of trust development (identification-based, knowledge-based, and deterrence/calculus-based trust). Trust in dentist-patient relationships needs to be assessed in a multidisciplinary approach for interconnectedness among relevant concepts. The findings are represented in patient-centred care and quality of care with common underlying values. Despite the centrality of trust in medical/dental contexts, empirical evidence is insufficient beyond normative suggestions from previous studies. Based on the implications of thematic analysis and interpretation of the system maps, this paper can serve as a guide and source of information for further research of trust in dentist-patient relationships.

The prevalence and severity of root surface caries across Australian generations.

BACKGROUND: The "failure of success" theory predicts that as subsequent generations of older adults retain more teeth, those additional teeth will experience more oral disease like root surface caries. The theory in relation to root surface caries has never been tested in a cross-generational study. This study aims to compare root surface caries across generations of South Australian older adults to test the theory and explore risk indicators for root surface caries. METHODS: Data were from the baseline of two South Australian studies separated by 22 years. In both studies, stratified random samples of people aged 60+ years from Adelaide and Mount Gambier were recruited. Dental examinations were performed by trained and calibrated dentists. One of the dental examiners from the earlier study was the gold standard examiner in the second study. Risk indicators included behavioural factors, clinical oral conditions, sociodemographic and socioeconomic status. Root surface caries was assessed as untreated root surface caries (root decayed surfaces [RDS]), treated root surface caries (root filled surfaces [RFS]) and treated or untreated root surface caries (root decayed and filled surfaces [RDFS]) and was presented as the prevalence and summed count. Multivariable models for Poisson and negative binomial distributions were used to estimate prevalence ratios (PR) and mean ratios (MR), respectively, and their 95% confidence intervals (95% CI). RESULTS: The current generation of South Australian older adults has significantly lower RDS (PR [95% CI] = 0.65 [0.47-0.89]; MR [95% CI] = 0.51 [0.35-0.73]) and RDFS (PR [95% CI] = 0.84 [0.71-0.99]; MR [95% CI] = 0.76 [0.65-0.90]) than the previous generation. The RFS in the previous and current generation was similar. Gingival recession, irregular brushing, dental visiting for a problem and smoking were the indicators for RDS, while age, gingival recession, tooth brushing frequency, time since last dental visit and reason of visiting were the indicators for RFS or RDFS. CONCLUSIONS: These results do not support the "failure of success" theory in relation to root surface caries among South Australian older adults. Despite the higher number of teeth retained, the current generation of older adults has less root surface caries than the previous generation. Behavioural factors remain the indicators of root surface caries across the generations.