(PR106) Evaluating the Surgical Lid Technique for Retrofilling in Root-End Resection: A Pilot Study on Survival Rates

Objective: This study aimed to describe the surgical lid technique as an efficient method for root-end filling in endodontic microsurgery (EMS) and to evaluate its impact on treatment outcomes. While the use of bioceramic materials has been studied, the effect of the lid technique on the success of EMS has not been previously assessed. The hypothesis was that the lid technique would result in high survival rates, offering a more predictable and efficient outcome.

Methods: An electronic database from a private practice in Boston, Massachusetts, was reviewed to identify patients who underwent EMS with the lid technique between 2010-2020. A total of 254 patients met the inclusion criteria and were contacted by phone to assess tooth survival based on patient-reported outcomes. Statistical analysis was conducted to calculate survival rates and explore the association between follow-up duration and survival.

Results: Responses were obtained for 108 cases. 46.3% (50/108) of the cases received the procedure 1-5 years prior to the survey, while 48.1% (52/108) received it 5-11 years prior. Of the 108 cases, 103 teeth remained functional and asymptomatic, resulting in a survival rate of 95.4%.

Conclusions: The surgical lid technique is a highly efficient and effective method for root-end filling in EMS, with favorable long-term survival rates. These results are consistent with studies using MTA, suggesting that the lid technique enhances surgical efficiency without compromising treatment success. Further clinical and radiographic studies are needed to fully assess long-term outcomes and identify potential prognostic factors.