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. 2013 Jul-Aug;21(4):346-50.
doi: 10.1590/1678-775720130034.

The efficacy of the self-adjusting file and ProTaper for removal of calcium hydroxide from root canals

Gisele Faria  1 , Milton Carlos Kuga, Alessandra Camila Ruy, Arturo Javier Aranda-Garcia, Idomeo Bonetti-Filho, Juliane Maria Guerreiro-Tanomaru, Renato Toledo Leonardo
Affiliations

The efficacy of the self-adjusting file and ProTaper for removal of calcium hydroxide from root canals

Gisele Faria et al. J Appl Oral Sci. 2013 Jul-Aug.

Abstract

Objective: The goal of this study was to evaluate the efficacy of the Self-Adjusting File (SAF) and ProTaper for removing calcium hydroxide [Ca(OH)2] from root canals.

Material and methods: Thirty-six human mandibular incisors were instrumented with the ProTaper system up to instrument F2 and filled with a Ca(OH)2-based dressing. After 7 days, specimens were distributed in two groups (n=15) according to the method of Ca(OH)2 removal. Group I (SAF) was irrigated with 5 mL of NaOCl and SAF was used for 30 seconds under constant irrigation with 5 mL of NaOCl using the Vatea irrigation device, followed by irrigation with 3 mL of EDTA and 5 mL of NaOCl. Group II (ProTaper) was irrigated with 5 mL of NaOCl, the F2 instrument was used for 30 seconds, followed by irrigation with 5 mL of NaOCl, 3 mL of EDTA, and 5 mL of NaOCl. In 3 teeth Ca(OH)2 was not removed (positive control) and in 3 teeth canals were not filled with Ca(OH)2 (negative control). Teeth were sectioned and prepared for the scanning electron microscopy. The amounts of residual Ca(OH)2 were evaluated in the middle and apical thirds using a 5-score system.

Results: None of the techniques completely removed the Ca(OH)2 dressing. No difference was observed between SAF and ProTaper in removing Ca(OH)2 in the middle (P=0.11) and the apical (P=0.23) thirds.

Conclusion: The SAF system showed similar efficacy to rotary instrument for removal of Ca(OH)2 from mandibular incisor root canals.

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Figures

Figure 1
Figure 1
Comparison of the efficacy of Self-Adjusting File (SAF) and ProTaper for removal of Ca(OH)2 from the root canal. ns=non-significant
Figure 2
Figure 2
Scanning electron microscopy images representative of the Self-Adjusting File (A=middle third; B=apical third) and ProTaper (C=middle third; D=apical third) groups showing calcium hydroxide residues (arrows). A and C are representative of score 2: few small agglomerations of debris. B and D are representative of score 3: many agglomerations of debris covering less than 50% of the root canal wall. Scale bar=100 μm
See this image and copyright information in PMC

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