The Balance between Oral Health Needs and Supply Induced Demand in Welsh Dental Services


Dental Workforce
Oral Health
Regression Analysis


How to Cite

Richards W, Ameen J, Coll A-M, Filipponi T. The Balance between Oral Health Needs and Supply Induced Demand in Welsh Dental Services. Integr J Med Sci [Internet]. 2021 Jan. 15 [cited 2021 Oct. 25];8. Available from:


Introduction: Reducing social inequality along with oral health inequality in Wales is a policy objective. In this ecological study the relationships between deprivation, dental workforce and oral health are explored.
Method: Twenty two Unitary Authorities (UAs) serving the population of Wales were studied. The number of dentists were obtained from NHS Business Services as well as the 2019 population figures from StatsWales. As data for whole time equivalent General Dental Practitioner (GDP) workforce were not available, GDP sites were used. The condition of teeth at the age 12 years was used as a measure of oral health from the most recent epidemiological survey available. The relationship between oral health and workforce was established using the Welsh Index of Multiple Deprivation (WIMD).
Results: Associations were observed between dental sites and population as well as between oral health and deprivation. A new composite variable called the University of South Wales Dental Index (USWDI) was introduced by combining the number of dentists with their corresponding WIMD of the most deprived 10% of the population. Using regression modelling the USWDI demonstrated its superiority in using either the number of dentists or the WIMD most deprived 10% alone to predict decayed, missing and filled teeth (DMFT).
Conclusion: Workforce levels have increased and there has been a corresponding improvement in oral health over two decades. At the same time deprived subgroups continue to experience relatively higher levels of disease. A proportion of the general dental services delivered in Wales has continued to be based on the principle of supply induced demand for care rather than oral health need. Improving oral health in a diverse population like Wales cannot be achieved by increasing dental workforce alone. It is necessary to account for levels of deprivation. USWDI as a predictor of DMFT could be a useful tool to monitor the macro delivery of oral health care for the future in Wales.


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