(PR093) Current Trends in Single-Visit vs. Multiple-Visit Root Canal Treatment: A Survey of Endodontists in the United States

Objective: Single-visit root canal treatment has gained popularity because it reduces the number of visits and prevents interappointment leakage, though concerns remain regarding post-treatment complications and incomplete disinfection. A 1982 survey of endodontists found that 16.8% reported treating necrotic cases in a single visit, rising to 34.8% in a 2002 survey. This present study aimed to examine current trends and demographic factors in practice preference and perception among U.S. endodontists regarding single-visit versus multiple-visit root canal treatments. It is the first comprehensive survey on this topic in over 20 years.

Methods: A 30-question survey was emailed to 3,525 AAE endodontists and was available from April to June 2024. Statistical analysis was performed via chi-squared test and logistic regression (p < 0.05).

Results: Of the 462 respondents, 74.9% reported treating necrotic cases in a single visit, while 92.4% reported single-visit for irreversible pulpitis. Younger endodontists (p < 0.001) and those practicing in the Western and Midwestern regions (p=0.022) were more likely to do single-visit. 71.9% reported no perceived difference in post-op complications between single-and multiple-visit treatment, and 81.2% reported no perceived difference in success rate. In addition, 61% of GentleWave and 41% of laser users answered that they increased their proportion of single-visit treatment after adopting it. The top three factors influencing treatment decisions were: fully dry canals, adequately instrumented canals, and available time.

Conclusion: This study highlights a growing trend toward single-visit treatment and identifies the criteria that endodontists use for their decision-making.