Impact of Delayed Dental Treatment during the COVID-19 Pandemic in an Undergraduate Dental Clinic in Southwestern Ontario, Canada - A Retrospective Chart Review

Objective: To investigate the impact of a COVID-19 mandated lockdown on the type and frequency of dental services accessed at an undergraduate dental clinic in southwestern Ontario.Methods: We retrieved anonymized sociodemographic (n = 4791) and billing data (n = 11616) of patients for 2 periods of 199 days, before (T1) and after (T2) lockdown. We applied descriptive statistics and used Student's t test to compare the type and frequency of dental services provided between the 2 periods. We mapped forward sortation area (FSA) codes of each patient.Results: Of the 4791 patients seen collectively in T1 and T2, most (67%) sought care before the lockdown. In both periods, most patients were >= 60 years of age (51.8%), female (33.9%) and residing in an urban area (88.6%). Compared with T1, there was a significant increase in middle-aged adults (p = 0.002) and significantly fewer patients earning over CAD 100 000 (p = 0.021) in T2. A total of 11616 billable procedures were carried out during T1 and T2: in T1, most procedures were preventative, whereas in T2, most were related to urgent care. Significantly fewer males than females sought urgent care, regardless of time. Finally, mapping showed a decrease in patients from Toronto, central and northern Ontario and clustering of patients in southwestern Ontario.Conclusions: We noted an overall reduction in billed services following the COVID-19 lockdown. The decrease in both billed services and patients seen during T2 demonstrates the impact of COVID-19 on access to timely and definitive dental care during the first 2 years of the pandemic.