Reciprocating System for Secondary Root Canal Treatment of Oval Canals: CBCT, X-rays for Remnant Detection and Their Identification with ESEM and EDX

Aim of the study: to evaluate root filling remnants after secondary canal treatments (SRCTs) oval-shaped canals with X-rays and cone beam computed tomography (CBCT). The SRCTs were performed using reciprocating NiTi instruments. Methods: Single-rooted teeth (N = 64) randomly treated Reciproc Blue (RB) filled AH Plus/single (SC group) or Plus/Guttafusion (GF group). After seven days storage in HBSS (Hanks balanced salt solution), Gates Glidden burs #2/3 RB #25 #40 used for SRCTs. time complete procedure was measured. CBCT calculate, respectively, area volume occupied by coronal, middle, apical thirds each canal. Environmental scanning electron microscopy (ESEM) energy dispersive X-ray spectroscopy (EDX) qualitative evaluation morphology composition sectioned roots. A statistical analysis Sigma Plot (version 13, IBM, Armonk, NY, USA). study designed according PRILE guidelines. Results: SRCTs, middle showed presence both groups, as demonstrated CBCT. GF group a statistically significant higher than SC Group only third. ESEM supported EDX revealed remnant detection trace elements sealer gutta-percha all canals. Conclusion: that third is critical region where packed spread buccal-lingual sides ESEM-EDX detected fine layer thirds, suggesting larger contamination examinations revealed.