Restorative Dentistry & Endodontics

Brenda Leite Muniz

2 Articles

Micro-computed tomographic evaluation of canal retreatments performed by undergraduate students using different techniques: Emmanuel João Nogueira Leal Silva, Felipe Gonçalves Belladonna, Marianna Fernandes Carapiá, Brenda Leite Muniz, Mariana Santoro Rocha, Edson Jorge Lima Moreira; Restor Dent Endod 2018;43(1):e5. Published online January 15, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e5

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.

Citations

Citations to this article as recorded by

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Neveen A Shaheen, Dalia A Sherif, Nahla G Elhelbawy
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Australian Endodontic Journal.2021; 47(3): 467. CrossRef
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Comparison of canal transportation in simulated curved canals prepared with ProTaper Universal and ProTaper Gold systems: Emmanuel João Nogueira Leal Silva, Brenda Leite Muniz, Frederico Pires, Felipe Gonçalves Belladonna, Aline Almeida Neves, Erick Miranda Souza, Gustavo De-Deus; Restor Dent Endod 2016;41(1):1-5. Published online February 4, 2016; DOI: https://doi.org/10.5395/rde.2016.41.1.1

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to assess the ability of ProTaper Gold (PTG, Dentsply Maillefer) in maintaining the original profile of root canal anatomy. For that, ProTaper Universal (PTU, Dentsply Maillefer) was used as reference techniques for comparison.

Materials and Methods

Twenty simulated curved canals manufactured in clear resin blocks were randomly assigned to 2 groups (n = 10) according to the system used for canal instrumentation: PTU and PTG groups, upto F2 files (25/0.08). Color stereomicroscopic images from each block were taken exactly at the same position before and after instrumentation. All image processing and data analysis were performed with an open source program (FIJI). Evaluation of canal transportation was obtained for two independent canal regions: straight and curved levels. Student's t test was used with a cut-off for significance set at α = 5%.

Results

Instrumentation systems significantly influenced canal transportation (p < 0.0001). A significant interaction between instrumentation system and root canal level (p < 0.0001) was found. PTU and PTG systems produced similar canal transportation at the straight part, while PTG system resulted in lower canal transportation than PTU system at the curved part. Canal transportation was higher at the curved canal portion (p < 0.0001).

Conclusions

PTG system produced overall less canal transportation in the curved portion when compared to PTU system.

Citations

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