Does more generous dental insurance coverage improve oral health?

Short-term effects of reduced cost sharing on childhood dental care utilization and dental caries prevention in Japan

OBJECTIVES

Generous dental insurance coverage can improve oral health among children. However, most previous studies were from the United States, and the results may not be applicable to countries with universal healthcare systems. The purpose of the present study was to examine the effect of dental subsidy on dental service utilization and oral health among school-aged children.

METHODS

An administrative claims database in Kumamoto Prefecture, Japan, between 2014 and 2015 was used for the study. Municipalities in which the upper age limit of qualification for the dental subsidy was either 9 years of age or older were selected. The difference-in-differences approach was used to investigate the impact of subsidy discontinuation on dental care utilization and dental caries prevention. Dental care utilization was measured by number of first visits, number of total visits, and dental care cost per visit. Failure in dental caries prevention was determined by identifying treatment for acute severe dental conditions.

RESULTS

During the study period, 1108 eligible children made a total of 6276 visits to the 455 selected dental clinics. Among the dental clinics, 230 (50.5%) were located in municipalities in which the dental subsidy was discontinued when children reached age 10. After adjusting for area income and minimal user charges, there were no significant differences in subsequent dental care utilization (mean ratio 1.01, 95% confidence interval [CI] 0.97-1.04 for first visits; mean ratio 1.01, 95% CI 0.98-1.05 for total visits), acute severe dental conditions (mean ratio 1.06, 95% CI 0.90-1.24) or cost (coefficient 0.7 US dollars; 95%CI -0.2-1.6) during the 12-month period following the policy change.

CONCLUSION

The current dental subsidy policy may have limited value for promoting dental care utilization and improving oral health among school-aged children in Japan.

Twelve years with a capitation payment system in Swedish dental care: longitudinal development of oral health

Background

Since 2007, patients receiving oral health care within the Public Dental Service in Sweden have had the possibility to choose between the traditional fee-for-service (FFS) payment system or the new capitation payment system, ‘Dental Care for Health’ (DCH). Payment models are believed to involve different incentive structures for patients and caregivers. In theory, different incentives may lead to differences in health-related outcomes, and the research has been inconclusive. This 12-year longitudinal prospective cohort study of patients in regular dental care analyzes oral health development and self-reported oral health in relation to the patients’ level of education in the two payment systems, and compares with the results from an earlier 6-year follow-up.

Methods

Information was obtained through a questionnaire and from a register from n = 5877 individuals who kept their original choice of payment model for 12 years, 1650 patients in DCH and 4227 in FFS, in the Public Dental Service in Region Västra Götaland, Sweden. The data comprised manifest caries prevalence, levels of self-reported oral health and education, and choice of dental care payment model. Analyses were performed with chi square and multivariable regression analysis.

Results

The findings from the 6-year follow-up were essentially maintained at the 12-year examination, showing that the pre-baseline caries prevalence is the most influential factor for less favorable oral health development in terms of the resulting caries prevalence. Educational level (≥ university) showed an increased influence on the risk of higher caries prevalence after 12 years and differed between payment models with regard to the relation to self-rated oral health.

Conclusions

Differences in health and health-influencing properties between payment models were sustained from 6 to 12 years. Strategies for making use of potential compensatory mechanisms within the capitation payment system to increase oral health equality should be considered.

The role of dental insurance in mitigating mortality among working-age U.S. adults with periodontitis

AIM

To assess the relationship of dental insurance with all-cause mortality and mortality due to cardiovascular diseases (CVD), diabetes mellitus (DM), and cerebrovascular diseases (CBD) among those with periodontitis.

MATERIALS AND METHODS

NHANES III and its associated mortality data set were used in this study. The outcome variables were "all-cause mortality" and "combined mortality" due to CVD, DM, and CBD. The independent variable was dental insurance stratified over periodontitis status. Unweighted frequencies with weighted column percentages were used for descriptive statistics, and chi-square test was applied for significance. Cox proportional hazard models were used for stratified multivariable analyses. All analyses were performed in SAS v9.4 accounting for survey data complexities. Significance level was kept at 5%.

RESULTS

The mortality was 14.58% for all-cause mortality and 4.06% for combined mortality among those with periodontitis in this study. Dental insurance significantly reduced the hazard of all-cause mortality among those with periodontitis (HR: 0.75; 95% CI: 0.61 - 0.93), adjusted for covariates. However, no association of dental insurance with combined mortality was observed among periodontitis group.

CONCLUSIONS

Dental insurance reduces hazard of all-cause mortality among those with periodontitis. Dental insurance ensures access to dentists and improves oral and dental health. Longitudinal study is needed to establish causality.

Educational inequalities in access to fixed prosthodontic treatment in Norway. Causal effects using the introduction of a school reform as an instrumental variable

OBJECTIVES

Equality in access to dental services, independent of level of education, is an important aim of Scandinavian welfare policy. In Norway, this policy is the main justification for a dental public subsidy scheme for adults. An important part of the subsidy scheme is to cover the cost of fixed prosthodontic treatment, including implant-based crowns and bridges for premolars, canines and incisors. A stated policy goal is to secure equal access to everybody in need of these services, independent of their level of education. The aim of this study was to estimate the causal effect of education on the probability of receiving fixed prosthodontic treatment in the adult Norwegian population.

METHODS

During the period 1960-1972, all municipalities in Norway were required to increase the number of compulsory years of education from seven to nine years. We used this education reform as the instrumental variable to create exogenous variation in the individual's number of years of education. The education data were combined with data from the Norwegian Health Economics Administration, which contained our outcome variable. Our sample included individuals with 9 years education or less. Altogether 113 237 individuals were included in the study.

RESULTS

For men, the first stage regression coefficient was 0.87 (confidence interval: 0.82-0.92). This means that the reform resulted in 0.87 additional years of education. For men, the probability of receiving fixed prosthodontic treatment increased by 0.67 percentage points per additional year of schooling. For women, the first stage regression coefficient was 0.84 (confidence interval: 0.79-0.88). The second stage regression coefficient was small (= 0.0022) and not statistically significant at a conventional level.

CONCLUSION

From a welfare policy point of view, for men, the subsidy scheme has not succeeded to redistribute resources so that dental services are accessible independent of their social status.

Healthcare consumption after a change in health insurance coverage: a French quasi-natural experiment

BACKGROUND

Compared with the number of studies performed in the United States, few studies have been conducted on the link between health insurance and healthcare consumption in Europe, likely because most European countries have compulsory national health insurance (NHI) or a national health service (NHS). Recently, a major French private insurer, offering voluntary complementary coverage in addition to the compulsory NHI, replaced its single standard package with a range of offers from basic coverage (BC) to extended coverage (EC), providing a quasi-natural experiment to test theoretical assumptions about consumption patterns.

METHODS

Reimbursement claim data from 85,541 insurees were analysed from 2009 to 2018. Insurees who opted for EC were matched to those still covered by BC with similar characteristics. Difference-in-differences (DiD) models were used to compare both the monetary value and physical quantities of healthcare consumption before and after the change in coverage.

RESULTS

As expected, the DiD models revealed a strongly significant, though transitory (mainly during the first year), increase after the change in coverage for EC insurees, particularly for costly care such as dental prostheses and spectacles. Surprisingly, consumption seemed to precede the change in coverage, suggesting that one possible determinant of opting for more coverage may be previous unplanned expenses.

CONCLUSION

Both catching-up behaviour and moral hazard are likely to play a role in the observed increase in healthcare consumption.

Attitudes towards tooth fillings in Tanzanian adults and its association with previous filling experience

Background

Tooth filling treatment is utilized at low levels in many low and middle-income countries (LMICs), further, little is known about the prevailing attitudes towards such treatment. This study aimed to assess attitudes towards tooth filling among Tanzanian adults and how previous tooth filling experience is associated with these attitudes.

Methods

A pretested structured questionnaire was distributed among 1522 out-patients in four regional hospitals in Tanzania in 2015–16. The questionnaire had eight statements on a 6-point Likert scale measuring attitudes towards tooth filling. Responses were analyzed independently and through a constructed attitude sum score. Linear regression analysis was used to assess the association of previous tooth fillings on attitudes towards tooth filling treatment.

Results

The respondents were mostly female (57.3%), with a mean age of 33.1 years (SD 11.3). About one third of the respondents (36.4%) had primary level of education. Attitudes towards tooth filling treatment were generally negative. Low levels of education and income were associated with more negative attitudes. A small proportion (11.5%) had a previous tooth filling. Having a previous tooth filling was associated with a more positive attitude towards tooth fillings regardless of socioeconomic status.

Conclusions

This study shows that even in areas with limited resources and availability of services, previous experience of tooth fillings is related to more positive attitudes towards restorative treatment, which should be taken into account when planning oral health care programs.

Electronic supplementary material

The online version of this article (10.1186/s12903-018-0474-x) contains supplementary material, which is available to authorized users.

Dental insurance, service use and health outcomes in Australia: a systematic review

Private health insurance plays a key role in financing dental care in Australia. Having private dental insurance has been associated with higher levels of access to dental care, visiting for a check-up and receiving a favourable pattern of services. Associations with better oral health have also been reported. In the absence of any existing review, this paper aims to systematically review the relationship between dental insurance and dental service use and/or oral health outcomes in Australia. A systematic search of online databases and subsequent sifting resulted in 36 publications, 33 of which were cross sectional and three cohort analyses. Dental service outcomes were more commonly reported than oral health outcomes. There was considerable heterogeneity in the outcome measures reported, for both service use and health outcomes. Overall, the majority of the evidence was from cross sectional studies and few studies reported analyses adjusted for confounding factors. The consolidated evidence points towards a positive association between dental insurance and dental visiting. Dentally insured adults are likely to have more regular access to dental care and have a more favourable pattern of service use than the uninsured. However, evidence of associations between dental insurance and oral health are mixed.

Barrier to Access or Cost Share? Coinsurance and Dental-Care Utilization in Colombia

BACKGROUND

Copayments, deductibles, and coinsurance, are elements of health-care systems to make prices salient for the insured. Individuals may respond differently to cost sharing, according to the type of care they seek; dental care, as a combination of both acute and elective care, is an ideal setting to study the effects of cost-sharing mechanisms on utilization.

OBJECTIVE

To test how coinsurance affects dental-care utilization in a middle-income country context.

METHODS

This study uses policy variations in the Colombian health-care system to analyze changes in dental-care utilization due to different levels of coinsurance. We used matching procedures to balance observed differences in pre-treatment variables between those who face coinsurance (non-policy holders, or beneficiaries) and those who don't (policyholders). We use zero-inflated negative binomial models for the count of visits and two-part models for total expenditures, and test for unobservable confounders with random-effect models and instrumental variables.

RESULTS

Individuals who face coinsurance are less likely to have any dental-care utilization, at a relatively small scale. Facing coinsurance does not correlate with changes in total expenditures. Falsification tests with dental-care visits exempt from coinsurance show no statistically distinguishable changes in utilization. Random-effect models and instrumental variable models show results similar to the main specification.

CONCLUSIONS

Cost-sharing policies in Colombia seem to be well designed because they don't represent an important barrier to dental-care access.

Effect of Family Income on the Relationship Between Parental Education and Sealant Prevalence, National Health and Nutrition Examination Survey, 2005-2010

INTRODUCTION

We examined the association between sealant prevalence and parental education for different levels of family income, controlling for other covariates.

METHODS

We combined data from 2005-2006, 2007-2008, and 2009-2010 cycles of the National Health and Nutrition Examination Survey. The study sample was 7,090 participants aged 6 to 19 years. Explanatory variables, chosen on the basis of Andersen and Aday's framework of health care utilization, were predisposing variables - child's age, sex, race/ethnicity, and parental education (high school diploma); enabling variables - family income (<100% of the federal poverty level [FPL]; 100%-200% of the FPL; and >200% of the FPL), health insurance status, and regular source of medical care; and a need variable - future need for care (perceived child health status is excellent/very good, good, fair/poor). We conducted bivariate and multivariate analyses and included a term for interaction between education and income in the multivariate model. We report significant findings (P ≤ .05).

RESULTS

Sealant prevalence was associated with all explanatory variables in bivariate and multivariate analyses. In bivariate analyses, higher parental education and family income were independently associated with higher sealant prevalence. In the multivariate analysis, higher parental education was associated with sealant prevalence among higher income children, but not among low-income children (<100% FPL). Sealant prevalence was higher among children with parental education greater than a high school diploma versus less than a high school diploma in families with income ≥100% FPL.

CONCLUSION

Our findings suggest that income modifies the association of parental education on sealant prevalence. Recognition of this relationship may be important for health promotion efforts.

Who chooses prepaid dental care? A baseline report of a prospective observational study

Background

An optional capitation prepayment system has been implemented in Swedish dental care, supplementary to the traditional fee-for-service scheme within the Public Dental Service. The implementation of a new system may have a variety of preferred and adverse effects, arguably dependent on the individual patient’s attitudes, health beliefs and course of action.

The aim of this study was to describe potential differences regarding socioeconomic and lifestyle factors, perceived oral health and attitudes towards oral health between patients in the two payment systems.

Methods

Questionnaire data were consecutively collected from 13,719 patients, who regularly attended 20 strategically selected clinics within the PDS in Region Västra Götaland, before they were offered the choice between the traditional and the new payment system.

Results

Capitation patients were more often female and well educated. They had healthier habits, were more motivated to follow self-care advice, more often judged their oral health to be very good and considered oral health to be very significant for their wellbeing. The results were statistically significant and described a gradient.

Conclusions

The more explicitly affirmative the answer, the more likely the patient was to choose the prepayment scheme. There appears to be a pattern of differences with respect to important individual views on oral health between patients choosing a capitation system or a fee-for-service system. These differences may be important when assessing outcomes in the new payment system and in public dental care.

Forgoing dental care for economic reasons in Switzerland: a six-year cross-sectional population-based study

Background

While oral health is part of general health and well-being, oral health disparities nevertheless persist. Potential mechanisms include socioeconomic factors that may influence access to dental care in the absence of universal dental care insurance coverage. We investigated the evolution, prevalence and determinants (including socioeconomic) of forgoing of dental care for economic reasons in a Swiss region, over the course of six years.

Methods

Repeated population-based surveys (2007–2012) of a representative sample of the adult population of the Canton of Geneva, Switzerland. Forgone dental care, socioeconomic and insurance status, marital status, and presence of dependent children were assessed using standardized methods.

Results

A total of 4313 subjects were included, 10.6% (457/4313) of whom reported having forgone dental care for economic reasons in the previous 12 months. The crude percentage varied from 2.4% in the wealthiest group (monthly income ≥13,000CHF, 1CHF ≈ 1$) to 23.5% among participants with the lowest income (<3,000CHF). Since 2007/8, forgoing dental care remained stable overall, but in subjects with a monthly income of <3,000CHF, the adjusted percentage increased from 16.3% in 2007/8 to 20.6% in 2012 (P trend = 0.002). Forgoing dental care for economic reasons was independently associated with lower income, younger age, female gender, current smoking, having dependent children, divorced status and not living with a partner, not having a supplementary health insurance, and receipt of a health insurance premium cost-subsidy.

Conclusions

In a Swiss region without universal dental care insurance coverage, prevalence of forgoing dental care for economic reasons was high and highly dependent on income. Efforts should be made to prevent high-risk populations from forgoing dental care.

Electronic supplementary material

The online version of this article (doi:10.1186/1472-6831-14-121) contains supplementary material, which is available to authorized users.

Cost-related dental non-attendance in older adulthood: evidence from eleven European countries and Israel

BACKGROUND

Although relevant for health policy, so far only little is known about the extent to which persons avoid dental attendance because of associated costs.

OBJECTIVES

To examine the cost-relatedness of dental non-attendance in various older adulthood populations.

MATERIAL AND METHODS

Secondary analyses were conducted of data from wave 1 of the Survey of Health, Ageing, and Retirement in Europe (SHARE), which includes unique information on recent dental non-attendance and care foregone due to costs by persons aged 50+ from eleven European countries and Israel. Multivariate logistic regression analysis was used to detect differences in the extent to which dental non-attendance is attributable to associated costs.

RESULTS

The study sample comprised 13 935 persons who did not access dental care within the past year. Levels of cost-related non-attendance differed between the twelve examined countries, ranging from 6.8% in Israel to 0.5% in Austria. Cost-related non-attendance was 47% less likely among persons with good as compared to compromised chewing ability (Odds Ratio: 0.53; 95% CI: 0.43-0.66). Cost-related non-attendance was 33% less likely among persons with tertiary as compared to (pre-) primary educational attainment (Odds Ratio: 0.67; 95% CI: 0.47-0.96). Cost-related dental non-attendance was significantly more likely among persons with low levels of general health (Odds Ratio for lowest vs. highest level of general health: 3.05; 95% CI: 1.88-4.95).

CONCLUSIONS

The findings of the present study suggest that a relatively small proportion of dental non-attendance in older adulthood is cost-related. For specific population subgroups in various countries, however, dental care costs may still pose a relevant barrier to dental care.

The potential oral health impact of cost barriers to dental care: findings from a Canadian population-based study

Background

Prior to the 2007/09 Canadian Health Measures Survey, there was no nationally representative clinical data on the oral health of Canadians experiencing cost barriers to dental care. The aim of this study was to determine the oral health status and dental treatment needs of Canadians reporting cost barriers to dental care.

Methods

A secondary data analysis of the 2007/09 Canadian Health Measures Survey was undertaken using a sample of 5,586 Canadians aged 6 to 79. Chi square tests were conducted to test the association between reporting cost barriers to care and oral health outcomes. Logistic regressions were conducted to identify predictors of reporting cost barriers.

Results

Individuals who reported cost barriers to dental care had poorer oral health and more treatment needs compared to their counterparts.

Conclusions

Avoiding dental care and/or foregoing recommended treatment because of cost may contribute to poor oral health. This study substantiates the potential likelihood of progressive dental problems caused by an inability to treat existing conditions due to financial barriers.

State case studies: improving access to dental care for the underserved

INTRODUCTION

This article, a supplement to the work of the Institute of Medicine's Committee on Oral Health Access, examines dental access disparities, reviews societal strategies for reducing disparities, explores the relationship between state level public health and dental safety net efforts and utilization/oral health outcomes, and describes selected public health and safety net programs with special promise.

METHODS

Data were obtained from interviews with state dental directors and safety net leaders and a review of the literature.

FINDINGS

There is a two-fold difference in utilization rates between low- (<30 percent) and high- (56 percent) income families. The three societal strategies for reducing disparities - Medicaid, dental safety net system, and increasing the supply of dentists - all have significant limitations. The primary factor positively related to oral health is per capita income. Five promising programs for reducing access disparities include a dental home initiative for young children; a virtual dental home for school children and nursing home residents; a women, infants, and children early oral education and prevention intervention program; an enhanced Medicaid reimbursement program for educational institutions in North Carolina; and a school-based dental care system run by Connecticut Federally Qualified Health Centers.

CONCLUSIONS

There are wide disparities in access to dental care, and current societal strategies to reduce disparities have significant limitations. At the state level, the primary determinant of oral health status is per capita income. Several states have promising programs to reduce disparities but most are still at the demonstration level and have not been adequately evaluated.

The impact of Medicaid insurance coverage on dental service use

The new comprehensive health reform, beginning in 2014, will require Medicaid to expand all elements of coverage to individuals with incomes up to 133 percent of the federal poverty line. With millions more individuals gaining eligibility for adult Medicaid dental benefits, generating an unbiased estimate of the elasticity of demand for dental services is critical. The causal relationship between access to adult Medicaid dental benefits and usage of dental services for low-income adults is estimated, using difference-in-differences estimation procedures to exploit the state-level variation in adult Medicaid dental benefits. Results suggest that adult Medicaid dental benefits increase the probability of a dental visit within 12 months by 16.4-22 percent. A variety of robustness checks are invoked to confirm the finding.

Residential rurality and oral health disparities: influences of contextual and individual factors

The purposes of the study were (a) to identify disparities between urban and rural adults in oral health and (b) to examine contextual (i.e., external environment and access to dental care) and individual (i.e., predisposing, enabling, and lifestyle behavioral) factors associated with oral health problems in a community population. Study data were derived from a two-stage, telephone-mailed survey conducted in 2006. The subjects were 2,591 adults aged 18 years and older. Cochran-Mantel-Haenszel statistics for categorical variables were applied to explore conditional independence between both health access and individual factors and oral health problems after controlling for the urban or rural residence. Logistic regression was used to investigate the simultaneous associations of contextual and individual factors in both rural and urban areas. Approximately one quarter (24.1%) of the study population reported oral health problems. Participants residing in rural areas reported more oral health disparities. Oral health problems were significantly associated with delaying dental care. These problems also were more common among those who were less educated, were African American, skipped breakfast every day, and currently smoked. The study findings suggest that oral health disparities persist for people in rural areas, and improving oral health status is strongly related to better access to oral health care and improved lifestyles in both rural and urban areas.

Inequity in a market-based health system: Evidence from Canada's dental sector

We study the extent and drivers of income-related inequity in utilization of dental services in Canada using the concentration-index approach that has been widely applied to study inequity in physician and hospital services. Because dental care is almost wholly privately financed in Canada, our estimates provide a benchmark for income-related inequity of utilization in private health systems. Although a number of studies document a link between income and utilization, our study is one of the few measuring income-related inequity in dental care utilization. A unique feature of our study is that we analyze separately inequity in total dental visits and in preventive visits. This is important because the case for equity is much clearer for preventive dental care. We also examine the impact of controlling for need using a wider variety of need indicators than previous analyses. We confirm that most oral health indicators perform poorly as need adjustors because they reflect past dental care use: individuals with higher levels of utilization also are in better oral health. Our most important finding is that access to preventive care is the most "pro-rich" type of dental care utilization and that income-related inequity in preventive dental care utilization is three times larger than what is measured for specialist services utilization in Canada.

Dental care coverage and retirement

OBJECTIVES

To examine the convergence of an aging population and a decreased availability of dental care coverage using data from the Health and Retirement Study (HRS).

METHODS

We calculate national estimates of the number and characteristics of those persons age 51 years and above covered by dental insurance by labor force, retirement status, and source of coverage. We also estimate a multivariate model controlling for potentially confounding variables.

RESULTS

We show that being in the labor force is a strong predictor of having dental coverage. For older retired adults not in the labor force, the only source for dental coverage is either a postretirement health benefit or spousal coverage.

CONCLUSIONS

Dental care, generally not covered in Medicare, is an important factor in the decision to seek dental care. It is important to understand the relationship between retirement and dental coverage in order to identify the best ways of improving oral health and access to care among older Americans.

The Influence of Dental Insurance on Institutionalized Older Adults in Ranking Their Oral Health Status

To assess whether dental insurance influences how institutionalized older adults ages 65 and older rank their oral health status, a census survey was designed for residents of Durham's (Canada) Municipal Homes for the Aged. The odds ratio (OR) and the Cochran & Mantel-Haenszel's OR were used to estimate the crude and adjusted effect of dental insurance on oral health status, respectively. Overall, 64 percent participated in the interview. Oral health status was ranked as "good," "very good" or "excellent" by 57 percent of the participants. This ranking was clearly unrelated to the residents having dental insurance, as only 28 percent had dental coverage. Significant effect modifiers included age, dental status and whether the participant had visited the dentist within the last year. Dental insurance positively influenced how dentate participants ranked their oral health status (OR = 2.26; 95 percent CI = 1.19; 4.28). In edentulous participants, age and visiting the dentist within the last year modified the effect of dental insurance on oral health status. Having dental insurance reduced the odds of reporting "good," "very good" or "excellent" oral health (OR = 0.20; 95 percent CI = 0.08; 0.49) among the participants ages 85 and older who did not visit the dentist within the last year; however, the opposite was true for their younger counterparts who visited the dentist within the last year (OR = 7.20; 95 percent CI = 1.08; 47.96). In this population, therefore, dental insurance was associated with higher oral health status rank among the dentate, but its effect on the edentulous population depended on age and the pattern of visiting the dentist.

The role of dentist, practice and patient factors in the provision of dental services

OBJECTIVES

Service provision varies by dentist, practice and patient factors. However, limited subsets of these potential influences on service rates have been explored. More comprehensive models could improve our understanding of the factors influencing the pattern of care delivered. The aim of this study was to examine variation in dental services by dentist (treatment choice, practice beliefs, preferences for patients, demographics), practice (type, location, size and volume of practice) and patient (visit, demographic, oral health and socio-economic) characteristics.

METHODS

A random sample of Australian dentists was surveyed in 1997-98 (response rate=60.3%). Private general practitioners (n=345) provided dentist and practice data, and service provision and patient variables were collected from a log of a typical clinical day (n=4,115 patients). Multivariate negative binomial regression models were fitted for diagnostic, preventive, restorative, extraction and prosthodontic services.

RESULTS

Significant dentist factors included (P<0.05; RR=rate ratio): lower diagnostic rates (RR=0.78) for dentists with stronger practice beliefs for giving information about cost and treatment options; preventive rates were lower (RR=0.74) for male dentists and higher (RR=1.48) for younger dentists aged 20-29 years; restorative rates were higher (RR=1.27) for dentists that rated patient preferences more highly in treatment choice and in the dentist age group 30-39 years (RR=1.25); extraction rates were lower (RR=0.61) for dentists with stronger preferences for patients that would adhere with treatment but higher (RR=1.57) for dentists with stronger preferences for sociable patients; and prosthodontic rates were lower (RR=0.38) for dentists with stronger preferences for adaptable patients who were willing to cooperate when expected to do so. Practice factors included: higher preventive (RR=1.28) and prosthodontic rates (RR=2.07) in solo practice; higher preventive (RR=1.34) but lower prosthodontic rates (RR=0.42) in capital cities; lower diagnostic (RR=0.82) and extraction rates (RR=0.55) in practices with fewer other dentists; higher diagnostic (RR=1.33) and extraction (RR=1.62) rates but lower restorative rates (RR=0.84) in practices with lower patient visits per year. Patient factors included: lower preventive (RR=0.76) but higher extraction rates (RR=1.45) for emergency visits; lower extraction rates (RR=0.60) for the insured; higher diagnostic rates (RR=1.17) for new patients; higher restorative (RR=1.31) but lower prosthodontic rates (RR=0.46) for patients with decayed teeth; higher prosthodontic rates (RR=2.14) for those with dentures; and lower preventive (RR=0.66), but higher extraction (RR=2.22) and prosthodontic rates (RR=1.82) for patients from lower socio-economic status areas.

CONCLUSIONS

Dental service rates were influenced by large number of small effects from a wide range of dentist, practice and patient factors. Socio-economic and geographic barriers may need broad policy innovations to be addressed, but factors such as insurance and visit type have the potential to be altered to achieve better service outcomes and there is scope for research into clinical outcomes to improve the knowledge upon which treatment decisions are based.

Influence of patient, visit, and oral health factors on dental service provision

OBJECTIVES

Service provision should reflect the oral health of the patient. However, patient and visit factors may influence service patterns and the appropriateness of care delivered. The aim of this study was to examine factors associated with variation in dental services and to assess whether variation by patient and visit characteristics persisted after controlling for oral health status.

METHODS

A random sample of Australian dentists was surveyed during 1997-98 (response rate = 60.3%). Private general practitioners (n = 345) provided data on service provision, as well as patient, visit and oral health variables from a log of a typical clinical day (n = 4,115 patients). Multivariate Poisson regression models were run for eight service areas (e.g., diagnostic, preventive, and restorative).

RESULTS

Significant effects (P < .05) were observed for oral health factors in all eight models, visit factors in all eight models, patient demographics in four models, dental knowledge/behavior in one model, and area-based socioeconomic status in one model.

CONCLUSIONS

After controlling for oral health, visit characteristics persisted as significant predictors of services, with nonemergency visits, insurance, and capital city location associated with more favorable service mix patterns. Higher socioeconomic status areas and payment scale ratings also were associated with a better service pattern in particular service areas. These findings show that a wide range of factors, in addition to oral health, contribute to variation in service provision.

Subsidized dental care associated with lower mutans streptococci count in male industrial workers

Salivary mutans streptococci count, dental status, and related factors were studied in male industrial workers (age 38-65 years) with or without access to subsidized dental care. Altogether 315 subsidized workers and 168 controls without subsidy were compared. A prior questionnaire survey had shown that the two study groups were similar in age, oral self-care habits, and socio-environmental factors. In the present study, the mean number of carious teeth was significantly lower in the subsidized group (0.4, SD 1.2) than in the control group (1.7, SD 3.2) (P< 0.001). Otherwise the study groups had similar dental status. A total of 92% subsidized employees had visited a dentist within the past 2 years, while 82% in the control group had done so (P< 0.01). According to the trend test, men in the subsidized group tended to have a lower mutans streptococci count than the control employees (P< 0.01). The logistic regression showed that the probability of having one or more carious tooth was significantly negatively associated with subsidized care and positively associated with high mutans streptococci count. It is concluded that subsidized dental care leading to a smaller number of untreated carious teeth might result in decreased levels of mutans streptococci.

Evaluation of a dental benefit plan for children conducted in Auvergne, France, since 1992

Usually, the French dental insurance system covers the cost of restorative treatment but does not reimburse the cost of preventive therapies. A French sick-fund covering self-employed persons tested a new dental benefit plan for children intended to provide an incentive to develop office-based preventive activities. The programme, which started in 1992, concerns all 4-year-old children of self-employed workers in a single French region (Auvergne). Participants undergo an annual examination by the dentist of their choice until their 15th birthday. If the child is seen every year, all services related to dental caries (preventive and restorative) are provided free of charge. An ongoing evaluation of the programme was necessary to determine its influence on the development of office-based preventive activities and the dental health of the participants. A cohort of children enrolled in the programme in 1992 was followed over 4 years to examine the patterns of service use. In addition, a cross-sectional study comparing the caries experience of all 8-year-old children participating continuously in the programme (test sample) with that of a sample of control children (n=90) was conducted in 1996. Data from the longitudinal follow-up indicate that 43.37% of the 551 children to whom the programme was offered in 1992 underwent an annual examination in the first year. Of the children enrolled in 1992, 55.2% were still participating in the programme in 1996. Results showed that independent practitioners continued to focus on restorative treatment rather than preventive therapy. Results from the cross-sectional study are in accordance with this trend. The number of caries-free children was identical in test and control samples and the mean dft, DMFT, DT and dt did not vary between the two groups (Student's t-test, P>0.05). However the mean number of filled teeth was significantly higher in the test children than in the controls (P<0.01). For children with caries, the mean dft was 23.5% greater in the test group than in the control group (P<0.05). In Auvergne, a large number of families were not ready to participate in a plan that required them to take their child to the dentist every year. There was not a perceived need for regular preventive dental care, an attitude probably reinforced by the interventionist approach undertaken by the dentists over the survey period. Moreover, the plan did not provide an incentive for dentists to develop office-based preventive activities.

A 5-year retrospective analysis of employer-provided dental care for Finnish male industrial workers

The treatment-mix, treatment time, and dental status of 268 male industrial workers entitled to employer-provided dental care were studied. The data were collected from treatment records of the covered workers over the 5-year period 1989-93. Treatment time was based on clinical treatment time recorded per patient visit, and the treatment procedure codes were reclassified into a treatment-mix according to American Dental Association categories, with a modification combining endodontics and restorative treatment. The mean number of check-ups followed by prescribed treatment (treatment courses) during the 5 years was 3.7 among those who had entered the in-house dental care program prior to the monitored period (old attenders). Their treatment time was stable, 57-63 min per year, while the first-year mean treatment time (170 min) of those who had entered the program during the study period (new attenders) was significantly higher (P < 0.01) than the 5-year mean of the old attenders (61 min). Over the first 2 years, the treatment-mix of the new attenders showed a rise in diagnostic and preventive procedures from one-third to about one-half of all procedures, as it was for the old attenders. The new attenders' mean number of carious teeth (2.7), registered at the initial check-up visit, paralleled the mean recently demonstrated in the similar non-covered population. It was significantly higher than the 5-year mean of the old attenders (0.5) (P < 0.001), but declined to the same level after the first year of treatment. It was concluded that the studied program seemed to contribute to a stabilization of treatment-mix, and to the establishment of a shorter annual treatment time within the first 2 years of treatment.

Insurance status and provision of dental services in Australian private general practice

Annual expenditure on dental care in Australia amounts to AUD 1.9 billion. Approximately one-third of this expenditure involves private dental insurance, yet little is known about the impact of insurance on the provision of services. The aim of this analysis was to examine differences in dental service provision between insured and non-insured patients. Data collected from a random sample of dentists from a survey conducted in 1993-94 were used, providing 817 responses (response rate 74%). Logistic regression analysis controlling for patient age and sex and reason for visit indicated that in private general practice insured patients were more likely to receive preventive (OR = 1.37), crown and bridge (OR = 2.25), and endodontic services (OR = 1.27), but less likely to receive extraction services (OR = 0.52). However, no significant differences by insurance status were found for diagnostic, restorative, or prosthodontic services in the multivariate models. These differences in service provision by insurance status indicate a more favorable pattern of services for insured patients, and point to equity issues in the provision of services.

Oral disadvantage among dentate adults

Oral disadvantage can be defined as the avoidance of certain daily activities because of decrements in oral health. These decrements include oral disease and tissue damage, pain, and functional limitation. The Florida Dental Care Study (FDCS) is a longitudinal study of changes in oral health, which included at baseline 873 subjects who had at least 1 tooth, were 45 years old or older, and who participated for an interview and clinical examination. Three objectives of the FDCS are: (1) to describe selected psychometric properties of the measurement of oral disadvantage; (2) to describe oral disadvantage in a diverse sample of dentate adults; and (3) to describe the relationship between disadvantage and other aspects of oral health, such as disease/tissue damage, pain, and functional limitation. The prevalence of oral disadvantage within the previous 6 months, using eight self-reported measures, ranged from 5% to 25%, depending upon the measure. Factor analysis suggested that oral disadvantage is best described as three factors: disadvantage due to (1) oral disease/tissue damage, (2) oral pain, and (3) oral functional limitation. Irregular dental attenders, poor persons, and blacks had the highest prevalence of oral disadvantage. Clinical measures of oral disease/tissue damage, self-reported measures of oral disease/tissue damage, oral pain, and oral functional limitation were strongly associated with the presence of oral disadvantage. In multivariate analyses that accounted for differences in clinical measures of disease/tissue damage, self-reported disease/tissue damage, oral pain, and oral functional limitation, females were more likely to report disadvantage due to disease/tissue damage, and middle-aged persons and irregular dental attenders were more likely to report oral disadvantage due to pain. In these same regressions, differences in disadvantage due to race, poverty status, socioeconomic status, and rural/urban area of residence were not evident. These results have implications regarding the use of oral disadvantage to assess the long-term effectiveness of dental care.

Does fluoridation reduce the use of dental services among adults?

OBJECTIVES

The authors determine whether prevention influences the use of health services. Fluoridation's effect on restorative dental demand among 972 Washington state employees and spouses, aged 20 to 34 years, in two fluoridated communities and a nonfluoridated community was examined.

METHODS

At baseline, adults were interviewed by telephone, and oral assessments were conducted to measure personal characteristics, lifetime exposure to fluoridated water, oral disease, and the quality of restorations. Adults were followed for 2 years to measure dental demand from dental claims. Each adult's baseline and claims data were linked with provider and practice variables collected from the dentist who provided treatment.

RESULTS

Relative to adults with no lifetime exposure to fluoridated water, adults drinking fluoridated water for half or more of their lives had less disease at baseline and a lower but nonsignificant probability of receiving a restoration in the follow-up period. In the 2-year follow-up period, however, more than half of the restorations were performed to replace fillings of satisfactory or ideal quality at baseline. When only teeth with decay and unsatisfactory fillings at baseline were considered, adults with high fluoridation exposure had a lower probability of receiving a restoration than adults with no exposure. Market effects also were detected in demand equations; relative to adults in the nonfluoridated community, adults residing in the fluoridated community with a large dentist supply received a greater number of restorations, suggesting potential supplier-induced demand from less disease and fewer patients.

CONCLUSIONS

Among adults aged 20 to 34 years with private dental insurance, fluoridation reduces oral disease but may or may not reduce use of restorative services, depending on dentists' clinical decisions.

Dental health attitudes among dentate black and white adults

OBJECTIVES

Blacks and poor persons share a greater burden of oral disease and are less likely to seek dental care on a regular basis. The role of dental attitudes and knowledge of services on this circumstance is unclear. The authors quantified group differences in dental attitudes and knowledge of services and related them to regularity of dental care use.

METHODS

As part of the baseline phase of The Florida Dental Care Study, a longitudinal study of oral health, 873 respondents who had at least one tooth and who were 45 years or older participated for an interview and a clinical dental examination. Dental care use, seven dental attitudinal constructs, and knowledge of dental services were queried.

RESULTS

Forty-five percent of respondents reported going to a dentist only when they have a problem, and 17% of respondents had not seen a dentist in more than 5 years. Ten percent of respondents reported that they had at least one permanent tooth removed by someone other than a dentist (typically, the respondent himself). Blacks and poor persons had more negative attitudes toward dental care and dental health and were less knowledgeable of dental services. Multivariate analyses suggested that dental attitudes were important to understanding the use of dental care services for this diverse group of adults, and that race and poverty contributed independently to dental care use even with dental attitudes taken into account.

CONCLUSIONS

Dental attitudes contribute to race and poverty differences in dental care use among adults. The persistence of race and poverty effects with attitudes taken into account suggests that additional explanatory factors contribute as well. These differences may contribute to more prevalent and severe oral health decrements among the same adults who also are more likely to suffer from other health decrements.

Periodontal awareness among adult Finns in 1972 and 1990

Surveys were conducted in 1972 and 1990 to analyze conceptions among Finns of their own periodontal status. The interview samples, drawn to represent the Finnish population, aged 15 years and more, comprised 965 persons in 1972 and 1,006 in 1990. After excluding edentulous individuals, a total of 732 in 1972 and 853 in 1990 were accepted for the interview study. In 1990, 2% of the respondents stated that they currently had gingivitis, the percentage being highest in the youngest age group (6%). In both years there were no statistically significant differences between the age, education, and residence subgroups with regard to gingivitis: nearly 60% of those in all subgroups claimed that they had never had gingivitis. The proportions of those who had never experienced gingival bleeding were 54% in 1972 and 50% in 1990. During the first observation period the youngest age group (15-24 years) was the only one in which the increment in self-recognized gingivitis was accompanied by a higher proportion experiencing gingival bleeding. The overall low prevalence of self-recognized gingivitis is at variance with the estimated periodontal treatment need according to Finnish clinical epidemiologic data. Our results indicate that knowledge concerning periodontal disease is still poor in Finland.

Factors influencing the appropriateness of restorative dental treatment: an epidemiologic perspective

OBJECTIVES

An epidemiology analysis was performed to identify patient and dentist factors influencing over- and undertreatment of restorative services in a sample of insured adults.

METHODS

At baseline, 681 Washington State employees and their spouses, aged 20 to 34 years and residing in the Olympia or Pullman areas, were interviewed by telephone. Oral assessments were conducted to measure personal characteristics, oral disease, and restoration quality. Adults were followed for two years to measure use of restorative services from dental insurance claims. Each adult's baseline and claims data were linked with provider and practice variables collected from the dentist who provided treatment.

RESULTS

For overtreatment, 39 percent of adults received one or more replacement restorations in nondecayed teeth with satisfactory fillings at baseline, while 18 percent of adults had one or more restorations placed in teeth with no decay and fillings. An adult's probability of overtreatment was higher if the adult had more fillings at baseline, or if an adult's dentist was younger, had a busy practice, advertised, charged higher fees, had less continuing education, or had a solo practice. For undertreatment, about 16 percent of adults either received no replacement restorations in teeth with unsatisfactory fillings at baseline, or had decayed teeth at baseline that were not filled or crowned. An adult's probability of undertreatment was higher if an adult had less decayed or more missing surfaces at baseline, or if an adult's dentist believed in sharing information with patients, had a busy practice, or reported not placing fillings when radiographic evidence of new caries was present.

CONCLUSIONS

A minority of adults aged 20 to 34 experienced potential over- or undertreatment of restorative services, which are influenced by both patient and dentist factors.

Dental knowledge, attitudes towards oral health care and utilization of dental services among male industrial workers with or without an employer-provided dental benefit scheme

In industrialized countries various dental benefit schemes have been implemented to improve the utilization of dental services, though few studies have demonstrated that effect. Prior to a comprehensive clinical study in southern Finland, a postal questionnaire survey of male industrial workers (age 38-65 yrs) was conducted to investigate knowledge and attitudes concerning oral health care and whether access to an employer-provided dental benefit scheme was associated with the utilization of dental services. The response rate was 81% (n = 325) in the subsidized group and 69% (n = 174) in the control group. In both groups, 60% of the subjects had had their last dental visit within a year but 91% of the subsidized workers compared to 79% of the controls had visited a dentist in the past two years (P < 0.001). The subjects had similar attitudes towards the importance of regular dental care and its implications for dental and general health. Subsidization explained the disparity in the current dental visiting pattern between the groups better than the possibility of using working hours for dental visits. Backward stepwise logistic regression revealed that the probability of a dental visit within the past two years was positively associated with access to an employer-provided dental benefit scheme, tooth brushing to maintain dental health, and number of teeth, and negatively associated with number of carious teeth. Our results demonstrate a positive impact of subsidization on the utilization of dental services.

Subsidized dental care improves caries status in male industrial workers

The association between an employer-provided dental benefit scheme and dental status was studied in male industrial workers in southern Finland in 1994. A total of 325 workers (age 38-65 yrs) with access to subsidized dental care and 174 controls completed a multiple-choice questionnaire followed by clinical examinations. One or more carious teeth was registered in 19% of the subsidized group and 50% of the controls (P < 0.001). For subjects with retained roots the proportions were 2% and 15%, respectively (P < 0.001). Among those with caries the mean number of carious teeth was 2.1 (SD 2.0) in the subsidized group, and 3.2 (SD 3.8) in the control group (P < 0.05). The groups did not differ significantly in numbers of teeth or filled teeth. The probability of having one or more carious teeth was negatively associated with access to subsidized dental care, with a recall or check-up as the reason for the last dental visit, and with having had the last dental visit within the past two years. The results showed that the dental benefit scheme resulted in less untreated caries.

The effect of dental insurance on the demand for dental services in the USA: a review

Examines the primary studies which have contributed to dental care research. By reviewing background information, lays a foundation for the review of the current empirical evidence, which examines the effect of dental insurance coverage on the oral health of the American population, as well as the utilization and demand for dental services. Raises questions and implications for future research and practice.

Older Floridians' attitudes toward and use of dental care

Older Floridians (mean age 78 years) were interviewed regarding their use of dental care, attitudes toward dental care, and other characteristics hypothesized as being explanatory of dental care use. Fifty-two percent of respondents reported having been to a dentist within the past year, and 31% had not been within the previous 5 years. Five constructs measured attitudes toward dental care and dental health: (a) the importance placed on regular dental care and oral hygiene, (b) the importance of avoiding tobacco to prevent oral cancer, (c) the value of dental care, (d) negative aspects of dental care, and (e) satisfaction with the last dental visit. In a multivariate model, the value of dental care and importance of regular care and oral hygiene wer significantly correlated with dental care use. These findings are consistent with the conclusion that attitudes contribute to understanding dental care use in later life, a contribution that is independent of the direct effects of socioeconomic status and dentate status.

Dental care in the NHS: reforms with teeth?

Dental services in the UK are currently undergoing a period of major upheaval. This paper examines recent policy initiatives with respect to patient charges, dentists' remuneration, information and patient choice, the supply of dental personnel, and the prevention of dental diseases. It is argued that changes in dentists' remuneration and the greater use of auxiliary personnel are likely to improve efficiency, whereas changes in patient charges are not. Water fluoridation remains the most efficient and equitable means of promoting dental health.

Oral signs, symptoms, and behaviors in older Floridians

Six hundred community-dwelling older Floridians were interviewed regarding the presence of reported signs of dental conditions, dental and oral symptoms, behavioral impact from dental conditions, and orofacial sensory changes. The prevalence of any single oral sign, symptom, or behavioral impact was generally low. A notable exception was the 39 percent prevalence of dry mouth. However, from 10 percent to 29 percent of persons had at least one of these dental signs, dental symptoms, dental behavioral impacts, or sensory changes. These findings are consistent with a noteworthy burden from nonoptimal oral health status, and these burdens were significantly more prevalent in irregular dental attenders, persons with lower household incomes, and persons who reported poorer general health. Inclusion of these non-disease items in an assessment of oral health status seems warranted, and would allow a broader evaluation of oral health outcomes.

Fluoridation effects on periodontal disease among adults

Numerous studies report that water fluoridation reduces caries in children, but little current evidence exists about fluoridation's effects on the periodontal health of adults. To address this issue, we estimated fluoridation effects on periodontal disease among 1066 Washington state employees and their spouses, aged 20 to 34, with current residences divided evenly between fluoridated and nonfluoridated communities. Subjects were interviewed by telephone to collect residence histories, personal characteristics and other data. Each subject's lifetime years of fluoridation exposure (YFE) was calculated from the person's residence history and the U.S. Centers for Disease Control's Fluoridation Census. Oral assessments were conducted to measure the extent of periodontal disease. Relative to adults with no exposure, continuous lifetime exposure reduced the probability of attachment loss from 0.87 to 0.72. Similar benefits were obtained for bleeding gingiva and calculus. The estimates of fluoridation's benefits were not influenced by selection bias due to subjects' nonparticipation in the oral assessments.

Understanding dentists' restorative treatment decisions

A critical review of the literature is presented that examines variation in dentists' restorative treatment decisions and the factors associated with this variation. Substantial variation has been documented in dentists' assessment of caries, in dentists' decisions to intervene, and in the selection of treatment recommended to the patient. However, the factors associated with this variation are not well documented. Following discussion of this review, a model is proposed to help guide further studies of dentists' restorative treatment decisions. This explanatory model incorporates the factors identified in the review, as well as others either observed informally or found in the medical literature. The implications of variation in dentists' treatment decisions highlight the importance of a full explication of the process dentists follow in making treatment decisions. Understanding this process, which heretofore has been examined only superficially because it has been regarded as a function of "clinical judgement," is fundamental to determinations of normative treatment needs, to interventions designed to reduce the frequency of inappropriate treatment, and to the development of valid practice parameters.

Expanding health insurance coverage and the implications for dentistry

Numerous proposals have been suggested for expanding health insurance coverage to the over 30 million Americans without health insurance. These proposals range from establishing a program of national health insurance modeled after the Canadian system to establishing statewide risk pools. Many of these proposals could have an impact on financial access to dental care for the approximately 120 million people without dental insurance. Dental insurance coverage has been shown to increase access to dental services and improve oral health status. Oral health professionals could facilitate discussions concerning health insurance expansion by informing policymakers about important preventive benefits to be gained by improving access to dental services. Dental public health professionals can serve as a bridge between organized dentistry and health policymakers by providing information to help formulate the priorities and characteristics of a dental health insurance program. This visibility and influence in the health policy arena would be beneficial to dentistry and could ultimately result in greater access to dental services and improved oral health for the uninsured.

Effects of cost sharing in health insurance on disability days

We assess how cost sharing for medical services affects restricted activity days (RADs) and work loss disability days (WLDs), using data from a controlled experiment. We grouped the experimental insurance plans into four categories, one providing free care and the other three requiring varying amounts of cost sharing. RADs per person per year decreased by one to two days with greater cost sharing, with the strongest effects among those of average or poor health status, especially the non-poor. Unlike RADs, WLDs showed no systematic differences by plan.

Charging for health care: evidence on the utilisation of NHS prescribed drugs

The effects of regular and frequent increases in charges for health care on patient utilisation are analysed using monthly data on National Health Service (NHS) prescribed drugs in England for the period 1979-1985. Using a partial adjustment model a utilisation equation of prescribed drugs is estimated for the adult non-elderly population that is subject to the NHS prescription charge. The maximum likelihood estimates of the coefficients of the equation imply that the charges policy followed in the U.K. has led to a significant reduction in utilisation among non-exempt patients. The short-run price elasticity of utilisation is -0.109 and the long-run elasticity is -0.09, while exempt utilisation is unaffected. Although the policy has generated a reduction in the central Government expenditure for prescribed drugs, on the basis of these estimates around 66% of these savings arise from the reduction in service use as opposed to the increased revenue per item of drugs.

Dental health personnel planning: a review of the literature

Dental personnel planning is important in formulating policy in dental education, dental public health programs, and dental care delivery systems. The purpose of this literature review is to illustrate the use of dentist-to-population ratios, need-based models, and demand-based models in the determination of appropriate supply of dental personnel. A historical perspective is provided that demonstrates how political manipulation and subjectivity have characterized the use of these models by organized dentistry, the federal government, and others. The lack of pertinent data and the inability to predict economic, social, political, and epidemiologic trends weaken the applicability of each model in determining future personnel levels. Considering the long-term consequences of the use of each model in personnel planning, caution is urged in using any of the presently available models.

Health care charges: lessons from the U.K

The introduction of increase in user charges is often suggested as a means of restraining the demands on the health care system. Patient charges have been used in the U.K. National Health Service since 1951 in the provision of prescribed drugs, dental treatment and spectacles. Recently, these charges have been extended to eyesight examinations and dental check-ups, while the levels of charges have increased far in excess of the rate of inflation. In this paper the implications of the extended use of patient charges are considered from the perspective of patients, the health care system and the Government, using available evidence on the effects of charges on consumer behaviour.

Dental treatment provided to young adult Danes enrolled in alternative dental programs during a 3-year period

From age 16 to 19 years three groups of young adults received alternative dental programs on termination of the Public Child Dental Health Service (PCDHS) in different municipalities: public group, n = 386; mixed group, n = 161; and private group, n = 261. During the entire study information on dental service use by the participants was taken from the records and National Health Insurance files. All dental services were calculated relative to a standardized Dental Service Unit defined by the value of a dental examination. During the entire study a mean of 30.53 Dental Service Units were provided, corresponding to 10.18 per year. More than half were of a diagnostic preventive character, and well over one-fourth were fillings. Irrespective of dental program, differences in dental services were noted with regard to utilization of dental services and to initial caries status. Users with high caries experience also received more fillings, but fewer preventive services. No association was found between gingival status and dental services provided.

Countering moral hazard in public and private health care systems: a review of recent evidence

Within both publicly and privately financed health care systems different funding mechanisms have evolved, or have been proposed, to deal with the problem of 'moral hazard'. Moral hazard arises when financial incentives within the health care system lead to either inefficient demands for care by consumers or inefficient supply of care by providers. In this paper the problem of moral hazard is outlined in more detail, and different ways of countering moral hazard are reviewed in terms of three criteria: effect on patient utilisation of health services in general: effect on utilisation by different groups of patients; and effect on health status. It is concluded that evidence on different methods of funding health services can only be judged in the context of objectives. If the objectives of health care delivery are 'maintenance or improvement of health' and 'equal access for equal need' then charges of finance of care through health maintenance organisations both appear to be less favourable than 'free' care at the point of delivery whilst the latter is not necessarily more costly as a result. Research on other suggested alternatives is required, otherwise radical changes to health care financing in the UK will simply result in movement from one unproven system to another.

The Rural Dental Health Program: long-term impact of two dental delivery systems on children's oral health

This paper addresses the long-term effect of two dental delivery systems established during the Rural Dental Health Program (RDHP) in 1975. At that time 725 children in grades K-2 were assigned randomly to an enriched dental health education program or regular health education program and to a SCHOOL- or COMMUNITY-based dental delivery system. Seven years after funding for RDHP ended, children originally assigned to the COMMUNITY group utilized more professional services and showed a higher level of dental knowledge than children assigned to the SCHOOL group. In addition, COMMUNITY-based children had, on average, twice as many sealed teeth. While the follow-up study did not reveal any statistically significant difference in the clinical oral health indices (DMFS, gingival index, calculus index, plaque index, periodontal probing depth, and orthodontic treatment priority index) the COMMUNITY-based children's higher level of professional dental service utilization, greater number of sealed teeth, and increased dental knowledge should lead to a higher level of oral health in the long run.