Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Micro-CT evaluation of the removal of root fillings using rotary and reciprocating systems supplemented by XP-Endo Finisher, the Self-Adjusting File, or Er,Cr:YSGG laser

  • Gulsen Kiraz (Department of Endodontics, Faculty of Dentistry, Kutahya Health Sciences University) ;
  • Bulem Ureyen Kaya (Department of Endodontics, Faculty of Dentistry, Suleyman Demirel University) ;
  • Mert Ocak (Department of Anatomy, Faculty of Dentistry, Ankara University) ;
  • Muhammet Bora Uzuner (Department of Anatomy, Faculty of Medicine, Bandirma Onyedi Eylul University) ;
  • Hakan Hamdi Celik (Department of Anatomy, Faculty of Medicine, Hacettepe University)
  • Received : 2023.06.12
  • Accepted : 2023.07.27
  • Published : 2023.11.30
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Abstract

Objectives: This study aimed to compare the effectiveness of a single-file reciprocating system (WaveOne Gold, WOG) and a multi-file rotary system (ProTaper Universal Retreatment, PTUR) in removing canal filling from severely curved canals and to evaluate the possible adjunctive effects of XP-Endo Finisher (XPF), the Self-Adjusting File (SAF), and an erbium, chromium: yttrium, scandium, gallium garnet (Er,Cr:YSGG) laser using microcomputed tomography (µCT). Materials and Methods: Sixty-six curved mandibular molars were divided into 2 groups based on the retreatment technique and then into 3 based on the supplementary method. The residual filling volumes and root canals were evaluated with µCT before and after retreatment, and after the supplementary steps. The data were statistically analyzed with the t-test, Mann-Whitney U test, analysis of covariance, and factorial analysis of variance (p < 0.05). Results: PTUR and WOG showed no significant difference in removing filling materials (p > 0.05). The supplementary techniques were significantly more effective than reciprocating or rotary systems only (p < 0.01). The supplementary steps showed no significant differences in canal filling removal effectiveness (p > 0.05), but XPF showed less dentin reduction than the SAF and Er,Cr:YSGG laser (p < 0.01). Conclusions: The supplementary methods significantly decreased the volume of residual filling materials. XPF caused minimal changes in root canal volume and might be preferred for retreatment in curved root canals. Supplementary approaches after retreatment procedures may improve root canal cleanliness.

Keywords

Acknowledgement

The authors would like to thank Associate Professor Ozgur Koskan for assistance with the statistical analysis.

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