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A comparative study of cyclic fatigue of 6 endodontic systems. An in vitro study

Identificadores del recurso

1989-5488

http://hdl.handle.net/20.500.12466/3799

https://doi.org/10.4317/jced.59747

Procedència

(RIUCV: Repositorio de la Universidad Católica de Valencia San Vicente Mártir)

Fitxa

Títol:: A comparative study of cyclic fatigue of 6 endodontic systems. An in vitro study
Tema:: Cyclic fatigue; Continuous movement; Separated fragment lengths; Rotary systems; 3213.13 Ortodoncia-Estomatología
Descripció:: Background: Mechanical preparation and the formation of space for adequate obturation are included in root canal shaping, but the complex root canal anatomy may be affect it. Manufacturers have created different alloys like M-Wire, Blue-Wire, Gold-Wire or R-phase. Objective: This investigation was performed to verify the null hypothesis that there were not significant differences between size 25 instruments ESP Files Thermoflex, Protaper Ultimate, Protaper Next, Blueshaper, One Curve and 2Shape about cyclic fatigue and length of broken fragments. Material and methods: 180 new size 25 files of the systems investigated were selected (n=30). Files were used with Endo Mate DT endo motor with speed and torque recommended by manufacturers, holding the instruments with clamping mechanism, with passive adjustment, glycerine and without pressure in a stainless-steel block. The time was calculated in seconds until fracture. Number of fatigue cycles was determined as (Resistance (s) x Speed)/60. Separated fragment lengths were calculated with digital Vernier caliper. Statistical analysis was carried out with the SPSS 18 programme at a 95% confidence level, using Levene´s Test to compare variances, Welch’s Test to compare means, and Games-Howell´s Test to reveal differences between groups. Results: Levene’s Test determined no equal variances (P<0.05). Welch’s Test and ANOVA (P<0.05) showed significant differences in cyclic fatigue and separated fragment lengths. Games-Howell’s and Bonferroni´s Test established significant differences in multiple comparisons (P<0.05). Conclusions: ESP Files Thermoflex was superior in cyclic fatigue. About separated fragment lengths, ESP Files Thermoflex, Protaper Ultimate and Blueshaper obtained longer lengths.; Odontología
Idioma:: English
Autor/Productor:: Rubio Climent, Jorge; Zarzosa Lopez, José Ignacio; Aranda Verdú, Susana; Casino Alegre, Alberto; Pallarés Sabater, Antonio
Drets:: Attribution-NonCommercial-NoDerivatives 4.0 Internacional; http://creativecommons.org/licenses/by-nc-nd/4.0/; openAccess
Data:: 2024-01-23T16:01:42Z; 2022-07
Tipo de recurso:: article

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1. <dc:title>A comparative study of cyclic fatigue of 6 endodontic systems. An in vitro study</dc:title>
2. <dc:creator>Rubio Climent, Jorge</dc:creator>
3. <dc:creator>Zarzosa Lopez, José Ignacio</dc:creator>
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5. <dc:creator>Casino Alegre, Alberto</dc:creator>
6. <dc:creator>Pallarés Sabater, Antonio</dc:creator>
7. <dc:subject>Cyclic fatigue</dc:subject>
8. <dc:subject>Continuous movement</dc:subject>
9. <dc:subject>Separated fragment lengths</dc:subject>
10. <dc:subject>Rotary systems</dc:subject>
11. <dc:subject>3213.13 Ortodoncia-Estomatología</dc:subject>
12. <dc:description>Background: Mechanical preparation and the formation of space for adequate obturation are included in root canal shaping, but the complex root canal anatomy may be affect it. Manufacturers have created different alloys like M-Wire, Blue-Wire, Gold-Wire or R-phase. Objective: This investigation was performed to verify the null hypothesis that there were not significant differences between size 25 instruments ESP Files Thermoflex, Protaper Ultimate, Protaper Next, Blueshaper, One Curve and 2Shape about cyclic fatigue and length of broken fragments. Material and methods: 180 new size 25 files of the systems investigated were selected (n=30). Files were used with Endo Mate DT endo motor with speed and torque recommended by manufacturers, holding the instruments with clamping mechanism, with passive adjustment, glycerine and without pressure in a stainless-steel block. The time was calculated in seconds until fracture. Number of fatigue cycles was determined as (Resistance (s) x Speed)/60. Separated fragment lengths were calculated with digital Vernier caliper. Statistical analysis was carried out with the SPSS 18 programme at a 95% confidence level, using Levene´s Test to compare variances, Welch’s Test to compare means, and Games-Howell´s Test to reveal differences between groups. Results: Levene’s Test determined no equal variances (P<0.05). Welch’s Test and ANOVA (P<0.05) showed significant differences in cyclic fatigue and separated fragment lengths. Games-Howell’s and Bonferroni´s Test established significant differences in multiple comparisons (P<0.05). Conclusions: ESP Files Thermoflex was superior in cyclic fatigue. About separated fragment lengths, ESP Files Thermoflex, Protaper Ultimate and Blueshaper obtained longer lengths.</dc:description>
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