Abstract
AIM: This study evaluated the retrievability of NeoMTA 2 and AH Plus root canal sealers using R-Motion reciprocating rotary instruments with microcomputed tomography (micro-CT) analysis.
MATERIALS AND METHODS: Twelve extracted mandibular first molars (24 mesial canals) were divided into two groups: One obturated with gutta-percha (GP) and NeoMTA 2 sealer, the other with GP and AH Plus sealer. Retreatment was performed using an R-Motion single-file system without solvent, followed by micro-CT analysis of sealer remnants in apical, middle, and cervical thirds. Solvent (0.5 mL d-limonene) with ultrasonic activation was then applied, and a fifth micro-CT scan was conducted.
RESULTS: NeoMTA 2 left significantly more residual sealer in all sections, especially the cervical third. Solvent use reduced remnants for both, but AH Plus was more effectively removed.
CONCLUSION: NeoMTA 2 is harder to retrieve than AH Plus, even with solvent-assisted retreatment.
CLINICAL SIGNIFICANCE: Combining R-Motion rotary files with gutta-percha solvents may improve clinical outcomes in endodontic retreatment protocols. How to cite this article: Al-Habib MA, Alsulaiman M. Retrievability of NeoMTA 2 vs AH Plus Sealer from Retreated Mesial Canals of Mandibular First Molars: A Microcomputed Tomography Ex Vivo Study. J Contemp Dent Pract 2025;26(5):493-499.