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Impact of root canal curvature and instrument type on the amount of extruded debris during retreatment

Restorative Dentistry & Endodontics 2021년 46권 1호 p.5 ~ 5
Serefoglu Burcu, Demirci Gozde Kandemir, Kurt Seniha Micoogullari, Bilgi Ilknur Kasikci, Caliskan Mehmet Kemal,
소속 상세정보
 ( Serefoglu Burcu ) - Ege University Faculty of Dentistry Department of Endodontics
 ( Demirci Gozde Kandemir ) - Ege University Faculty of Dentistry Department of Endodontics
 ( Kurt Seniha Micoogullari ) - Ege University Faculty of Dentistry Department of Endodontics
 ( Bilgi Ilknur Kasikci ) - Bornova Oral Health Center
 ( Caliskan Mehmet Kemal ) - Ege University Faculty of Dentistry Department of Endodontics

Abstract


Objectives: The aim of the current study was to assess whether the amount of extruded debris differs for straight and severely curved root canals during retreatment using H-files, R-Endo, Reciproc and ProTaper Universal Retreatment (PTU-R) files. Additionally, the area of residual filling material was evaluated.

Materials and Methods: Severely curved (n = 104) and straight (n = 104) root canals of maxillary molar teeth were prepared with WaveOne Primary file and obturated with gutta-percha and AH Plus sealer. Root canal filling materials were removed with one of the preparation techniques: group 1: H-file; group 2: R-Endo; group 3: Reciproc; group 4: PTU-R (n = 26). The amount of extruded material and the area of the residual filling material was measured. The data were analyzed with 2-way analysis of variance (ANOVA) and 1-way ANOVA at the 0.05 significance level.

Results: Except for Reciproc group (p > 0.05), PTU-R, R-Endo, and H-file systems extruded significantly more debris in severely curved canals (p < 0.05). Each file system caused more residual filling material in severely curved canals than in straight ones (p < 0.05).

Conclusions: All instruments used in this study caused apical debris extrusion. Root canal curvature had an effect on extruded debris, except for Reciproc system. Clinicians should be aware that the difficult morphology of the severely curved root canals is a factor increasing the amount of extruded debris during the retreatment procedure.

키워드

Canal curvature; Debris extrusion; Ni-Ti instruments; Retreatment

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