to analyze retrospectively the outcomes of endodontic retreatment and associated tooth survival during a follow-up period of 5 years.
•N= 4744 nonsurgical retreatment procedures.
•Data were obtained from the Delta Dental Insurance Data Center.
•A total of 4744 nonsurgical retreatment procedures were analyzed by searching for the specific American Dental Association (ADA) procedure code for retreatment.
•Patients included in this study were enrolled in the dental plan for a continuous period from 2000–2007, and all endodontic retreatments were performed by endodontists.
•After completion of the retreatment, the teeth were tracked in the database during the entire period, and the percentages of teeth that were retained or underwent additional procedures such as apical surgery or extraction were recorded.
Most highlighted Results:
Overall, 89% of all teeth were retained in the oral cavity after nonsurgical endodontic retreatment. and 11% were extracted at the end of the 5-year observation period. 4% percent of all teeth underwent apical surgery,
the results suggest that endodontic retreatment is a procedure with a very good survival rate.