XP Endo Finisher-R and PUI as supplementary methods to remove root filling materials from curved canals

• Published in: Brazilian oral research 2022, Vol.36, p.e053-e053
• Main Authors: Matoso, Felipe Barros, Quintana, Ramiro Martins, Jardine, Alexander Pompermayer, Delai, Debora, Fontanella, Vania Regina Camargo, Grazziotin-Soares, Renata, Kopper, Patricia Maria Poli
• Format: Article
• Language: English
• Subjects: Dental Pulp Cavity - diagnostic imaging; DENTISTRY, ORAL SURGERY & MEDICINE; Retreatment; Root Canal Filling Materials - therapeutic use; Root Canal Obturation; Root Canal Preparation; Ultrasonics
• ISSN: 1806-8324; 1807-3107; 1807-3107
• DOI: 10.1590/1807-3107bor-2022.vol36.0053

This study assessed the ability of XP-endo Finisher R (FKG, La Chaux-de-Fonds, Switzerland) to remove filling remnants from curved mesiobuccal canals of maxillary molars, using the passive ultrasonic irrigation (PUI) technique as a comparison. Twenty-four curved main mesiobuccal canals (MB1) of maxillary molars were instrumented with Wave One (#25/07) and filled with gutta-percha points and AH Plus Sealer. Samples were then re-treated with a standardized protocol with Wave One (#35/06) as the master apical file. Micro-CT scans measured baseline volume of remaining filling material (in mm3). Samples were divided into two groups (n = 12) according to the supplementary cleaning approach: (PUI) or XP-endo Finisher R. Statistics compared baseline and final volume of filling material (within-group); and the percentage of filling material reduction (between-group). Mean baseline volumes, final volumes, and percentages of reduction (%) of filling material for XP-endo Finisher R and PUI were respectively: 0.060 mm3, 0.042 mm3, and 31.28%; and 0.064 mm3, 0.054 mm3, and 16.57%. Both tested protocols reduced the amount of filling material (p < 0.05). XP-endo Finisher R had higher percentage of reduction as compared to PUI (p < 0.05). XP-endo Finisher R and PUI used as supplementary cleaning protocols during re-treatment improved the removal of root filling material in curved canals; but XP-endo Finisher R was approximately twice more efficient. The complete filling material removal during re-treatment procedures is still a challenge. Supplementary cleaning protocols may help to remove the remaining material after the complete mechanical preparation of curved canals. XP-endo Finisher R was approximately twice more efficient than PUI.