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How Risky Are Deep Sedation & General Anesthesia in the Dental Practice?

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Sedation and anesthesia for dentistry has come under scrutiny in the past few years due to a few tragic events where patients experienced harm. These events have raised several questions about the safety of these procedures in the dental practice. I have invited Dr. Alia El-Mowafy, dental anesthesiologist and Fellow at the University of Toronto, to tell us about a recent study she conducted precisely about the safety of deep sedation and general anesthesia in dental practices in the province of Ontario.

Dr. Alia El-Mowafy attended the Bachelor of Science programme at York University majoring in Psychology and Kinesiology. She went on to complete her degree in dentistry at Future University in Egypt. She completed her masters degree in Dental Anaesthesiology at the University of Toronto.

I hope you like the information presented. We always welcome your feedback, suggestions, and questions at oasisdiscussions@cda-adc.ca or if you prefer to speak with us, you can call our toll free number 1-855-716-2747.

Until next time!

Chiraz Guessaier, CDA Oasis Manager

Highlights

The purpose of the study was to estimate the prevalence of mortality and serious morbidity for office-based deep sedation and general anesthesia (DS/GA) for dentistry in Ontario from 1996-2015.

Data were collected retrospectively in two phases. Phase I involved the review of incidents; and Phase II involved a survey of DS/GA providers. In Phase I, cases involving serious injury or death for dentistry under DS/GA, sourced from the Office of the Chief Coroner of Ontario and from the Royal College of Dental Surgeons of Ontario (RCDSO), were reviewed. Phase II involved a survey of all RCDSO registered providers of DS/GA where they were asked to estimate the number of DS/GA administered in 2015 and the number of years in practice since 1996. Clinician data were pooled to estimate an overall number of DS/GA administered in dental offices in Ontario from 1996-2015. Prevalence was calculated using Phase I and Phase II findings.

The estimated prevalence of mortality in the 20-year period from 1996-2015 was 3 deaths in 3,742,068 cases, with an adjusted mortality rate of 0.8 deaths per 1 million cases. The estimated prevalence of serious morbidity was 1 injury in 3,742,068 cases, which adjusts to a serious morbidity rate of 0.25 per 1 million cases.

The mortality rate found in this study was slightly lower than those published by earlier studies conducted in Ontario, and it fits within the lower range of mortality reported by similar studies for office-based DS/GA in dentistry. The risk of serious morbidity was found to be low and similar to other studies investigating morbidity in office-based dental anaesthesia.

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