Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Efficacy of reciprocating instruments and final irrigant activation protocols on retreatment of mesiobuccal roots of maxillary molars: a micro-CT analysis

  • Lilian Tietz (Department of Conservative Dentistry, Federal University of Rio Grande do Sul - UFRGS) ;
  • Renan Diego Furlan (Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry/ University of Sao Paulo - FOB/USP) ;
  • Ricardo Abreu da Rosa (Department of Conservative Dentistry, Federal University of Rio Grande do Sul - UFRGS) ;
  • Marco Antonio Hungaro Duarte (Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry/ University of Sao Paulo - FOB/USP) ;
  • Murilo Priori Alcalde (Health Science Center, Sacred Heart University - UNISAGRADO) ;
  • Rodrigo Ricci Vivan (Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry/ University of Sao Paulo - FOB/USP) ;
  • Theodoro Weissheimer (Department of Conservative Dentistry, Federal University of Rio Grande do Sul - UFRGS) ;
  • Marcus Vinicius Reis So (Department of Conservative Dentistry, Federal University of Rio Grande do Sul - UFRGS)
  • Received : 2021.06.09
  • Accepted : 2021.09.07
  • Published : 2022.02.28
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Abstract

Objectives: This study evaluated the efficacy of 3 reciprocating systems and the effects of 2 instruments for irrigant activation on filling material removal. Materials and Methods: Forty mesiobuccal roots of maxillary molars were prepared up to size 25.06 and obturated. Micro-computed tomography (micro-CT) examination #1 was performed. Teeth were then divided into 4 groups (n = 10), according to the retreatment protocol: (1) manual, (2) Reciproc Blue, (3) WaveOne Gold, and (4) X1 Blue. Micro-CT examinations #2 and #3 were performed after filling removal and repreparation, respectively. Next, all teeth were divided into 2 new groups (n = 20) according to the irrigant activation protocol: XP Clean (XP Clean size 25.02) and Flatsonic (Flatsonic ultrasonic tip). Micro-CT examination #4 was performed after irrigant activation. Statistical analysis was performed with a significance level set at 5%. Results: WaveOne Gold removed a significantly greater amount of filling material than the manual group (p < 0.05). The time to reach the WL was similar for all reciprocating systems (p > 0.05). X1 Blue was faster than the manual group (p < 0.05). Only manual group improved the filling material removal after the repreparation stage (p < 0.05). Both activation protocols significantly improved the filling material removal (p < 0.05), without differences between them (p > 0.05). Conclusions: None of the tested instruments completely removed the filling material. X1 Blue size 25.06 reached the working length in the shortest time. XP Clean and Flatsonic improved the filling material removal.

Keywords

References

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