Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/588018cc7f8c9d0a098b4e18
Revista de Odontologia da UNESP
Original Article

Comparison of gutta-percha and sealer removal in the different thirds of the root canal after using ProTaper retreatment

Comparação do remanescente de material obturador nos diferentes terços do canal radicular após uso dos desobturadores ProTaper

Uezu, Mary Kinue Nakamune; Nabeshima, Cleber Keiti; Britto, Maria Leticia Borges

Downloads: 1
Views: 748

Abstract

The aim of this study was to analyze the amount of gutta-percha removal using on different thirds in teeth shaped using Gates Glidden and Protaper, and retreated with Protaper Retreatment. Fifty lower premolars of single canal were accessed, shaped using Gates Glidden (1, 2, 3) and ProTaper (S1, S2, F1, F2, F3), and filled by lateral and vertical condensation and N-Rickert sealer, then stored at 37 °C in a humid environment for 7 days, when gutta‑percha removal was performed by ProTaper Retreatment system. The amount of filling material remaining on root canal walls was assessed radiographically from two directions: mesio-distal and bucco-lingual, and the images were digitized and analysed with ImageJ software. Total canal area and area of remaining filling material were calculated and divided on thirds, and then they were submitted to statistical evaluation by ANOVA and Tukey test. The coronal third showed more amount of remaining filling material than medium and apical third (p = 0.0002), and no total gutta-percha removal was perfomed on coronal third too. It concluded that on teeth shaped using Gattes Glidden and Protaper, the Protaper Retreatment system show satisfactory results just on medium and apical third.

Keywords

Retreatment, gutta-percha, endodontics

Resumo

A proposta deste estudo foi analisar a quantidade de remanescente de material obturador em diferentes terços em dentes preparados com Gates Glidden e ProTaper, e desobturados com desobturadores ProTaper. Quinze pré‑molares inferiores com conduto único foram acessados, preparados com Gates Glidden (1, 2 e 3) e protaper (S1, S2, F1, F2, F3), obturados pela técnica da condensação lateral e vertical associadas ao cimento N-Rickert e incubados a 37 °C com 100% de umidade por sete dias. Assim, as amostras foram desobturadas com uso dos Desobturadores Protaper. A quantidade de remanescente de material obturador foi verificada radiograficamente em duas direções: mésiodistal e vestíbulolingual, e as imagens digitalizadas e analisadas com ImageJ software. As áreas totais do canal e o remanescente de material obturador foram calculados e divididos em terços, sendo submetidos ao teste de ANOVA e Tukey. O terço cervical apresentou maior quantidade de material remanescente quando comparado aos terços médio e apical (p = 0,0002), e nenhuma amostra apresentou remoção total no terço cervical. Pode‑se concluir que em dentes instrumentados com sistema rotatório Protaper e Gates Glidden, os desobturadores ProTaper produzem resultados satisfatórios somente nos terços médio e apical.

Palavras-chave

Retratamento, guta-percha, endodontia

References



1. Berger CR. Endodontia. São Paulo: Editora Pancast; 1998.

2. Machado MEL. Endodontia da biologia à técnica. São Paulo: Editora Santos; 2007.

3. Nair PNR. On the causes of persistent apical periodontitis: a review. Int Endod J. 2006; 39: 249-81.

4. Cunha RS, De Martin AS, Barros PP, Silva FM, Jacinto RC, Bueno CES. In vitro evaluation of the cleansing working time and analysis of the amount of gutta-percha or resilon remnants in the root canal walls after instrumentation for endodontic retreatment. J Endod. 2007; 33: 1426-8.

5. Baratto Filho F, Ferreira EL, Fariniuk LF. Efficiency of the 0.04 taper ProFile during the re-treatment of gutta-percha filled root canals. Int Endod J. 2002; 35: 651-4.

6. Ferreira JJ, Rhodes JS, Pitt Ford TR. The efficacy of gutta-percha removal using ProFiles. Int Endod J. 2001; 34: 267-74.

7. Fenoul G, Meless GD, Pérez F. The efficacy of R-Endo rotary NiTi and stainless-steel hand instruments to remove gutta-percha and resilon. Int Endod J. 2010; 43: 135-41.

8. Gu L-S, Ling J-Q, Wei X, Huang X-Y. Efficacy of protaper universal rotary retreatment system for gutta-percha removal from root canals. Int Endod J. 2008; 41: 288-95.

9. Saad AY, Al-Hadlaq SM, Al-Katheeri NH. Efficacy of two rotary NiTi instruments in the removal of gutta-percha during root canal retreatment. J Endod. 2007; 33: 38-41.

10. Takahashi CM, Cunha RS, Martin AS, Fontana CE, Silveira CFM, Bueno CES. In vitro evaluation of the effectiveness of Protaper Universal Rotary Retreatment system for gutta-percha removal with or without a solvent. J Endod. 2009; 35: 1580-3.

11. Taşdemir T, Er K, Yildirim T, Çelik D. Efficacy of three rotary NiTi instruments in removing gutta-percha from root canals. Int Endod J. 2008; 41: 191-6.

12. Aydɪn B, Köse T, Çalɪşkan MK. Effectiveness of hero 642 versus hedström files for removing gutta-percha fillings in curved root canals: an ex vivo study. Int Endod J. 2009; 42: 1050-6.

13. Gergi R, Sabbagh C. Effectiveness of two nickel-titanium rotary instruments and a hand file for removing gutta-percha in severely curved root canals during retreatment: an ex vivo study. Int Endod J. 2007; 40: 532-7.

14. Kosti E, Lambrianidis T, Economides N, Neofitou C. Ex vivo study of the efficacy of H-files and rotary Ni–Ti instruments to remove gutta‑percha and four types of sealer. Int Endod J. 2006; 39: 48-54.

15. Zmener O, Pameijer CH, Banegas G. Retreatment efficacy of hand versus automated instrumentation in oval-shaped root canals: an ex vivo study. Int Endod J. 2006; 39: 521-6.

16. Hülsman M, Bluhm V. Efficacy, cleaning ability and safety of different rotary NiTi instruments in root canal retreatment. Int Endod J. 2004; 37: 468-76.

17. Schrmeister JF, Wrbas K-T, Schneider FH, Altenburger MJ, Hellwig E. Efectiveness of a hand file and three nickel-titanium rotary instruments for removing gutta-percha in curved root canals during retreatment. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006; 101: 542-7.

18. Sydney GB, Ferreira M, Leonardi DP, Deonízio MDA, Batista A. Análise da radiopacidade de cimentos endodônticos por meio de radiografia digital. Rev Odonto Ciênc. 2008; 23: 338-41.

19. Masieiro AV, Barletta FB. Effectiveness of different techniques for removing gutta-percha during retreatment. Int Endod J. 2005; 38: 2-7.
588018cc7f8c9d0a098b4e18 rou Articles
Links & Downloads

Rev. odontol. UNESP

Share this page
Page Sections