Peña-Bengoa Fernando, Abarca Jaime, Cáceres Carolina, Steinfort Karin, Niklander Sven Eric, Silva Emmanuel João Nogueira Leal
Department of Endodontics, Faculty of Dentistry, Universidad Andres Bello, Viña del Mar, Chile.
Postgraduate Program in Endodontics, Faculty of Dentistry, San Sebastian University, Santiago, Chile.
Aust Endod J. 2025 Aug 15. doi: 10.1111/aej.70011.
This study evaluated the retreatability of two bioceramic-based sealers in oval-shaped canals and the effectiveness of supplementary cleaning techniques for removing sealer remnants. Mandibular premolars were obturated with either NeoSEALER Flo or AH Plus Bioceramic. After obturation, specimens were retreated followed by supplementary cleaning with XP-Endo Finisher R, EasyClean, or passive ultrasonic irrigation. Sealer remnants were analysed using confocal laser scanning microscopy and scanning electron microscopy. AH Plus Bioceramic showed a significantly lower residual sealer percentage than NeoSEALER Flo in the coronal and middle thirds. XP-Endo Finisher R was more effective for NeoSEALER Flo in the apical third, while passive ultrasonic irrigation was superior for AH Plus Bioceramic in the coronal and middle thirds. Scanning electron microscopy revealed sealer remnants in all groups, with partial obstruction of dentinal tubules. Bioceramic sealers exhibit different retreatability, and supplementary cleaning protocols improved sealer removal, but none achieved complete canal wall cleanliness.
本研究评估了两种生物陶瓷基封闭剂在椭圆形根管中的可再处理性，以及辅助清洁技术去除封闭剂残余物的有效性。下颌前磨牙分别用NeoSEALER Flo或AH Plus Bioceramic进行充填。充填后，对标本进行再处理，随后用XP-Endo Finisher R、EasyClean或被动超声冲洗进行辅助清洁。使用共聚焦激光扫描显微镜和扫描电子显微镜分析封闭剂残余物。在冠部和中部三分之一处，AH Plus Bioceramic的残余封闭剂百分比显著低于NeoSEALER Flo。XP-Endo Finisher R对根尖三分之一处的NeoSEALER Flo更有效，而被动超声冲洗在冠部和中部三分之一处对AH Plus Bioceramic更有效。扫描电子显微镜显示所有组中均有封闭剂残余物，牙本质小管部分堵塞。生物陶瓷封闭剂表现出不同的可再处理性，辅助清洁方案改善了封闭剂的去除，但均未实现根管壁的完全清洁。
