Service provision trends between 1983–84 and 1993–94 in Australian private general practice

Patterns of service provision are expected to change over time, reflecting the dynamics of factors such as oral health status and trends in population demographics. The aim of this study was to identify trends in service provision over time. Data were collected from a random sample of Australian dentists in 1983–84, 1988–89, and 1993–94. Changes observed between 1983–84 and 1993–94 included a trend towards increased proportions of patients in older age groups, restorative care (from 40.2 per cent to 37.7 per cent) and prosthodontic care (9.3 per cent to 8.0 per cent) and increases in diagnostic (from 38.7 per cent to 46.0 per cent), preventive (20.9 per cent to 7.1 per cent), and crown and bridge services (3.1 per cent to 4.7 per cent) per visit. Other services such as orthodontic and general/miscellaneous services showed increases over the first half of the study period, but these did not continue between 1988–89 and 1993–94. The total number of services per visit increased over the study period for adult patients. These findings indicate changing patterns of practice over time, consistent with an increasing orientation towards prevention of disease and maintenance of a natural dentition.     

Service provision trends among Australian private general dental practitioners: 1983/84 to 1998/99

AIM: To investigate time trends in service provision. DESIGN: Four cross-sectional surveys across a 15-year period. SETTING: Australian private general practice. PARTICIPANTS: A random sample of dentists. METHODS: Dentists were surveyed by mailed questionnaire in 1983, 1988, 1993 and 1998 (response rates 71%-75%). Data were weighted to provide representative estimates for the age by sex distribution of private general practitioners in 1983, 1988, 1993 and 1998. MAIN OUTCOME MEASURES: Services per visit, annual services per dentist, annual services per patient. RESULTS: Total services per visit increased over the study period from 1.78 to 2.14 (Poisson regression; p < 0.05). However the annual number of services provided per dentist did not vary significantly, reflecting a trend among dentists to supply fewer patient visits per year. The annual number of services provided per patient increased over the period from 3.47 to 5.22 (OLS regression; p < 0.05), reflecting both the increased service rate per visit and increased numbers of visits by patients. Dentists provided less restorative, prosthodontic and extraction services per year, but more endodontic and crown and bridge services. The pattern of annual care received per patient also included more endodontic and crown and bridge services but differed from the dentist pattern through increased service rates over the study period in areas such as restorative, diagnostic and preventive. CONCLUSIONS: While dentists are providing a similar number of services annually, the content of their workload has changed to include less emphasis on removal and replacement of teeth and more effort on maintenance and retention of natural dentitions.     

Diagnostic and preventive service trends in private general practice: 1983-1984 to 1998-1999

BACKGROUND: Aggregate trends have indicated increases in the provision of diagnostic and preventive services but there have been few reports based on their component sub-categories. The aims of this study were to investigate time trends in the provision of sub-categories of diagnostic an preventive services across a 15-year period. METHODS: A random sample of Australian dentists was surveyed by mailed questionnaire in 1983-1984, 1988-1989, 1993-1994 and 1998-1999 (response rates 71-75 per cent). Data were weighted to provide representative estimates for the age by sex distribution of private general practitioners in 1983, 1988, 1993 and 1998. RESULTS: Rates per visit were higher, Poisson regression, P<0.05, in 1998-1999 compared to baseline for examinations, radiographs, prophylaxis and topical fluoride. Diagnostic and preventive service rates varied by age of patient: compared to patients aged 65+ years, examinations were higher among children aged <5 years to adults aged 25-44 years, radiographs were lower among children <5 years and 5-11 years but higher among adults aged from 18-24 years to 45-64 years, prophylaxis services were lower among children <5 years but higher among adolescents 12-17 years to adults aged 45-64 years, while topical fluoride was higher among children 5-11 years and adolescents 12-17 years. CONCLUSIONS: Examination, radiograph, prophylaxis, and topical fluoride rates increased over the study period. While examination rates increased for both children and adults, and prophylaxis rates increased for adolescents and adults, rates for radiographs and topical fluoride only increased for adults. Age-specific changes in service rates over time indicate the effect of changing oral health status and population demographics on service provision.     

Practice activity trends among Australian private general dental practitioners: 1983-84 to 1998-99

AIM: To investigate time trends in practice activity. DESIGN: Four cross-sectional surveys across a 15 year period. SETTING: Australian private general practice. PARTICIPANTS: A random sample of dentists. METHODS: Dentists were surveyed by mailed questionnaire in 1983, 1988, 1993 and 1998 (response rates 71%-75%). Data were weighted to provide representative estimates for the age by sex distribution of private general practitioners in 1983, 1988, 1993 and 1998. MAIN OUTCOME MEASURES: Hours per year worked, patient visits per hour and patient visits per year. RESULTS: The number of patient visits per year declined across the period, related to parallel decreases in the number of patient visits per hour (ANOVA; P<0.05), while there was no significant difference during the period in the number of hours per year devoted to work. The interaction of dentist sex by time of survey indicated that while numbers of patient visits per year had remained stable for female dentists, there was a trend for the higher number of patient visits per year among male dentists at the beginning of the survey period to decline over time. CONCLUSIONS: Male dentists had higher levels of practice activity compared with female dentists, but a decline in the number of patient visits per year reflected a convergence of male practice patterns towards that of female dentists.     

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

Abstract Annual expenditure on dental care in Australia amounts to ADD 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 favourable pattern of services for insured patients, and point to equity issues in the provision of services.     

Trends in service provision among Australian private general dental practitioners over a 20-year period

AIM: To-investigate time trends in service provision. DESIGN: Five cross-sectional surveys across a 20-year period. SETTING: Australian private general practice PARTICIPANTS: A random sample of dentists. METHODS: Mailed questionnaires were collected in 1983, 1988, 1993, 1998 and 2003 (response rates 71%-76%). MAIN OUTCOME MEASURES: Services per visit, annual services per dentist; annual services per patient. RESULTS: Total services per visit increased over the study period from 1.78 to 2.37 (Poisson regression; P<0.05). However the annual number of services provided per dentist did not vary significantly, reflecting a trend among dentists to supply fewer patient visits per year. The annual number of services provided per patient increased from 3.47 to 5.50 (OLS regression; P<0.05), reflecting both increased service rates per visit and increased numbers of visits by patients. Dentists provided less restorative, prosthodontic and extraction services per year, but more diagnostic, preventive, endodontic and crown and bridge services. The annual care received per patient also included more diagnostic, preventive, endodontic and crown and bridge services but differed from the dentist pattern through increased rates of restorative services over the study period. CONCLUSIONS: The content of dentist workloads has changed to include less emphasis on removal and replacement of teeth and more effort on diagnosis and prevention aimed at retention of natural dentitions.     

Variations in self-reported provision of services by general dentists in private practice

BackgroundVariations in dentists&;apos; provision of services have been documented, but information about contributing factors is limited.MethodsThe authors used responses to a 2003 survey of general dentists in private practice in California (46 percent response rate; 3,098 dentists included in the final sample) to assess variations in service provision and its correlates. They used logistic regressions to assess the correlation of various characteristics with the self-reported percentage of time spent providing services.ResultsThe results show variations in services provided by general dentists in private practice. Multiple factors, including the dentist&;apos;s sex, region of practice, employment of hygienists, patients&;apos; race and population income in the area of practice were significantly and independently associated with provision of services.ConclusionsThe survey results reflect practice variations that existed before the latest economic downturn, which resulted in a loss of jobs and medical and dental insurance. The data serve as the baseline for future studies of changes in dental practice and for assessing the impact of the 2010 health care reform legislation on dental practice.Practice ImplicationsImprovements in oral health care, the recent economic decline and health care reform may lead to changes in dental practice and in the dental workforce.     

Service patterns associated with coronal caries in private general dental practice

OBJECTIVES: To describe the pattern of dental services associated with dental caries by level of carious lesion severity. METHODS: Data were collected by a mailed survey from a random sample of dentists from each State/Territory in Australia in 2003-2004. Dentists provided service data on patients treated on a typical clinical day for patients attending with a diagnosis of dental caries. RESULTS: Restorative rates were higher for insured patients, radiograph rates were higher for emergency visits, prophylaxis and topical fluoride rates were higher for non-emergency visits and at capital city locations with topical fluoride also higher for patients from higher socio-economic status areas, endodontic rates were higher for emergency visits and at non-capital city locations, while extraction rates were higher for males, uninsured patients and for emergency visits. Poisson regression models compared the rates of services from different service areas for initial and cavitated carious lesions with gross carious lesions, controlling for patient demographics, visit type, location and socio-economic status. Restorative services were provided at higher rates (P<0.05) for cavitated carious lesions (RR=2.38), radiographs were provided at lower rates for both initial (RR=0.28) and cavitated carious lesions (RR=0.31), both prophylaxis and topical fluoride services were provided at higher rates for initial carious lesions (RR=2.33 and 3.00, respectively), endodontic services were provided at lower rates for both initial (RR=0.03) and cavitated carious lesions (RR=0.07), and extractions were provided at lower rates for both initial (RR=0.23) and cavitated carious lesions (RR=0.16) compared to the reference category of gross caries. CONCLUSION: Service patterns varied by level of carious lesion severity with initial carious lesions managed by more preventive services, cavitated carious lesions with more restorative services, gross carious lesions with more radiographic, endodontic and extraction services. However, initial carious lesions tend to be managed with restorative rather than preventive service, suggesting scope for increased management by minimum intervention approaches.     

A survey of the pattern of private general dental practice in Queensland

All non-specialist ADA member private practitioners in Queensland were invited to participate in a survey to determine the number of the various types of permanent restorations placed in one week and the percentage breakdown of the time they devoted to the various areas of dentistry. Final year dentistry students at the University of Queensland were asked to estimate the projected breakdown of their time in future practice. Results showed that amalgam is still by far the most commonly used material followed by composite resin and glass ionomer cement and that restorative dentistry accounts for the bulk of the practitioners' time. Students' estimations of the work mix were in agreement with those of the practitioners.     

A survey of the pattern of private general dental practice in Queensland, 1992

In 1987 all non-specialist ADA member private practitioners in Queensland were invited to participate in a survey to determine the number of the various types of permanent restorations placed in one week and the percentage breakdown of the time they devoted to the various areas of dentistry. Results of that survey were published in 1989. The survey with a few minor changes was repeated in 1992. Results show that there has been little change in the pattern of practice over the five years with restorative dentistry still taking a very large proportion of respondents' time and similar materials being used. The dental workforce appears to be relatively stable with low rates of overseas and interstate migration. There is evidence of an increasing number of women dentists in the workforce and this is emphasized by a breakdown of the current undergraduate enrolment.     

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.     

Owners' insights into private practice dentistry in New South Wales and the Australian Capital Territory

Background: The aim of this study was to investigate aspects of practice ownership including debt on graduation, the time period between graduation and acquiring practice ownership and small business skills. Methods: A mail survey of 400 dentists with practice ownership, in New South Wales (NSW) and the Australian Capital Territory (ACT), addressed demographics, setting up practice, technology and business management. Most respondents were male and nearly half had 20 years of practice ownership. Results: Dentists agreed with the need to be taught small business management skills. Average debt on graduation was AUD$18 000 and the figure was higher for post 1995 graduates. On average, it took five years to acquire some form of practice ownership, but nearly half acquired ownership within three years. Few favoured opening a new practice. Staff were the most frequently nominated contributors to a successful practice, with fees, profit and parking noted least frequently. Conclusions: There was no question that these experienced dentists thought small business skills should be taught to the dental fraternity. Given the significance of staff to a successful practice, dentists may need to learn more about advanced human resource management including professional development and performance management.     

Hygienist employment and the presence of periodontal notations in general dental practice patient records

Available data suggest that the provision of periodontal ly related services in general dental practices is low. However, studies indicate that the employment of dental hygienists is associated with increased provision. One method of measuring is by examination of notations in patient treatment records. As part of a project assessing the effectiveness of professional education in changing the provision of periodontal services, 2280 records, comprising 60 randomly selected records of dentate adult patients who had received a dental examination in the previous 6 months were audited in each of 38 practices, 13 of which employed hygienists. Entries of a periodontal nature were classified under 3 categories: diagnostic, preventive and treatment. The presence or absence of each item on each record was recorded. Diagnostic services were notated infrequently overall, but practices employing hygienists had a significantly lower number of records with no diagnostic notations. Preventive items were more frequently notated in practices employing hygienists. Treatment items were most frequently notated in both types of practices. Overall, 13 of the 23 items were recorded significantly more frequently in practices employing hygienists.