Authors
Wohlgemuth P., Cuocolo D., Vandrangi P., Sigurdsson A.
Title
Effectiveness of the GentleWave System in removing separated instruments
Journal
Journal of Endodontics 41(11):1895-1898, 2015
Link
https://www.ardentis.ch/wp-content/uploads/2026/05/Publi-2015-Wohlgemuth-JEndod-2.pdf
Abstract
Abstract Introduction: A separated instrument in a root canal system has the potential to severely affect the outcome of endodontic therapy. This study evaluated the effectiveness of the minimally invasive GentleWave System (Sonendo Inc, Laguna Hills, CA) in removing separated stainless steel endodontic files from the apical and midroot regions of molar root canals. Methods: Thirty-six extracted human molars were accessed, and the glide path was confirmed to the apex. ISO #10, #15, and #20 K-file fragments of 2.5 mm length were separated at the apical (n = 18) or midroot (n = 18) region of the molars by engaging a weakened file with downward pressure. The teeth were divided into two groups based on root curvature (<30° and >30°). The success rate of instrument removal and the treatment time were recorded. Statistical comparisons were performed using the Fisher exact test and independent two-sample t-test (P < .05). Results: The overall success rate of instrument removal was 61% for files in the apical region and 83% for the midroot region. Less curved canals (<30°) showed a 91% success rate (n = 24), whereas canals with curvature greater than 30° had a 42% success rate (n = 12). The median treatment time for instrument retrieval was 10 minutes and 44 seconds. Conclusions: The results indicate that the GentleWave System is effective in retrieving separated instruments while conserving dentinal structure.
Keywords
Key Words File separation, GentleWave System, Multisonics Ultracleaning, steel hand files
