Micro-computed tomographic evaluation of canal retreatments performed by undergraduate students using different techniques
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Objectives This study evaluated the amount of remaining root canal filling materials after retreatment procedures performed by undergraduate students using manual, rotary, and reciprocating techniques through micro-computed tomographic analysis. The incidence of instrument fracture and the instrumentation time were also evaluated. Materials and Methods Thirty maxillary single rooted teeth were prepared with Reciproc R25 files and filled with gutta-percha and AH Plus sealer by the continuous wave of condensation technique. Then, the specimens were assigned to 3 groups (n = 10), according to the retreatment technique used: manual, rotary, and reciprocating groups, which used K-file, Mtwo retreatment file, and Reciproc file, respectively. Retreatments were performed by undergraduate students. The sample was scanned after root canal filling and retreatment procedures, and the images of the canals were examined to quantify the amount of remaining filling material. The incidence of instrument fracture and the instrumentation time were recorded. Results Remaining filling material was observed in all specimens regardless of the technique used. The mean volume of remaining material was significantly lower in the Reciproc group than in the manual K-file and Mtwo retreatment groups (p < 0.05). The time required to achieve a satisfactory removal of canal filling material and refinement was significantly lower in the Mtwo retreatment and Reciproc groups (p < 0.05) when compared to the manual K-file group. No instrument fracture was observed in any of the groups. Conclusions Reciproc was the most effective instrument in the removal of canal fillings after retreatments performed by undergraduate students.
Abstract
Objectives This study evaluated the amount of remaining root canal filling materials after retreatment procedures performed by undergraduate students using manual, rotary, and reciprocating techniques through micro-computed tomographic analysis. The incidence of instrument fracture and the instrumentation time were also evaluated. Materials and Methods Thirty maxillary single rooted teeth were prepared with Reciproc R25 files and filled with gutta-percha and AH Plus sealer by the continuous wave of condensation technique. Then, the specimens were assigned to 3 groups (n = 10), according to the retreatment technique used: manual, rotary, and reciprocating groups, which used K-file, Mtwo retreatment file, and Reciproc file, respectively. Retreatments were performed by undergraduate students. The sample was scanned after root canal filling and retreatment procedures, and the images of the canals were examined to quantify the amount of remaining filling material. The incidence of instrument fracture and the instrumentation time were recorded. Results Remaining filling material was observed in all specimens regardless of the technique used. The mean volume of remaining material was significantly lower in the Reciproc group than in the manual K-file and Mtwo retreatment groups (p < 0.05). The time required to achieve a satisfactory removal of canal filling material and refinement was significantly lower in the Mtwo retreatment and Reciproc groups (p < 0.05) when compared to the manual K-file group. No instrument fracture was observed in any of the groups. Conclusions Reciproc was the most effective instrument in the removal of canal fillings after retreatments performed by undergraduate students.
참고문헌 (28)
- Imura N, "The outcome of endodontic treatment: a retrospective study of 2000 cases performed by a specialist", J Endod, 33, pp.1278~1282 (2007)[DOI]
- Siqueira JF Jr, "Causes and management of post-treatment apical periodontitis", Br Dent J, 216, pp.305~312 (2014)[DOI]
- Taşdemir T, "Efcacy of three rotary NiTi instruments in removing gutta-percha from root canals", Int Endod J, 41, pp.191~196 (2008)[DOI]
- Gu LS, "Efcacy of ProTaper Universal rotary retreatment system for gutta- percha removal from root canals", Int Endod J, 41, pp.288~295 (2008)[DOI]
- Duncan HF, "Removal of root flling materials", Endod Topics, 19, pp.33~57 (2008)[DOI]
- Ricucci D, "Histologic investigation of root canal-treated teeth with apical periodontitis: a retrospective study from twenty-four patients", J Endod, 35, pp.493~502 (2009)[DOI]
- Ma J, "Efcacy of ProTaper Universal Rotary Retreatment system for gutta-percha removal from oval root canals: a micro-computed tomography study", J Endod, 38, pp.1516~1520 (2012)[DOI]
- Bernardes RA, "Comparison of three retreatment techniques with ultrasonic activation in fattened canals using micro-computed tomography and scanning electron microscopy", Int Endod J, 49, pp.890~897 (2016)[DOI]
- Zuolo AS, "Efcacy of reciprocating and rotary techniques for removing flling material during root canal retreatment", Int Endod J, 46, pp.947~953 (2013)[DOI]
- Silva EJ, "Reciprocating versus rotary systems for root flling removal: assessment of the apically extruded material", J Endod, 40, pp.2077~2080 (2014)[DOI]
- De-Deus G, "Extended cyclic fatigue life of F2 ProTaper instruments used in reciprocating movement", Int Endod J, 43, pp.1063~1068 (2010)[DOI]
- Stefen H, "Comparison of K hand fles and ProFiles 0.06", 0.04 in simulated curved root canals prepared by students, 2006, pp.37, 811~817
- Abu-Tahun I, "Technical quality of root canal treatment of posterior teeth afer rotary or hand preparation by ffh year undergraduate students, The University of Jordan", Aust Endod J, 40, pp.123~130 (2014)[DOI]
- Schneider SW, "A comparison of canal preparations in straight and curved root canals", Oral Surg Oral Med Oral Pathol, 32, pp.271~275 (1971)[DOI]
- Nair PN, "On the causes of persistent apical periodontitis: a review", Int Endod J, 39, pp.249~281 (2006)[DOI]
- Stabholz A, "Endodontic retreatment--case selection and technique. Part 2: treatment planning for retreatment", J Endod, 14, pp.607~614 (1988)[DOI]
- Saad AY, "Efcacy of two rotary NiTi instruments in the removal of gutta- percha during root canal retreatment", J Endod, 33, pp.38~41 (2007)[DOI]
- Solomonov M, "Self-adjusting fles in retreatment: a high-resolution micro-computed tomography study", J Endod, 38, pp.1283~1287 (2012)[DOI]
- Gluskin AH, "A reconstructed computerized tomographic comparison of Ni-Ti rotary GT fles versus traditional instruments in canals shaped by novice operators", Int Endod J, 34, pp.476~484 (2001)[DOI]
- Abu-Tahun I, "Technical quality of root canal treatment of posterior teeth afer rotary or hand preparation by ffh year undergraduate students, The University of Jordan", Aust Endod J, 40, pp.123~130 (2014)[DOI]
- Marending M, "Comparison of two contemporary rotary systems in a preclinical student course setting", Int Endod J, 49, pp.591~598 (2016)[DOI]
- Alves FR, "Removal of root canal fllings in curved canals using either reciprocating singleor rotary multi-instrument systems and a supplementary step with the XP-Endo Finisher", J Endod, 42, pp.1114~1119 (2016)[DOI]
- Sae-Lim V, "Efectiveness of ProFile. 04 taper rotary instruments in endodontic retreatment", J Endod, 26, pp.100~104 (2000)[DOI]
- Betti LV, "Quantec SC rotary instruments versus hand fles for gutta-percha removal in root canal retreatment", Int Endod J, 34, pp.514~519 (2001)[DOI]
- Hulsmann M, "Efcacy, cleaning ability and safety of diferent rotary NiTi instruments in root canal retreatment", Int Endod J, 37, pp.468~476 (2004)[DOI]
- Barrieshi-Nusair KM, "Gutta-percha retreatment: efectiveness of nickel-titanium rotary instruments versus stainless steel hand fles", J Endod, 28, pp.454~456 (2002)[DOI]
- Wilcox LR, "Endodontic retreatment with halothane versus chloroform solvent", J Endod, 21, pp.305~307 (1995)[DOI]
- Tagger M, "Evaluation of the apical seal produced by a hybrid root canal flling method, combining lateral condensation and thermatic compaction", J Endod, 10, pp.299~303 (1984)[DOI]