Mechanical Performance and Metallurgical Features of ProTaper Universal and 6 Replicalike Systems

Jorge N.R. Martins; Emmanuel J.N.L. Silva; Duarte Marques; Mário Rito Pereira; António Ginjeira; Rui J.C. Silva; Francisco Manuel Braz Fernandes; Marco Aurélio Versiani

doi:10.1016/j.joen.2020.08.021

Mechanical Performance and Metallurgical Features of ProTaper Universal and 6 Replicalike Systems

Jorge N.R. Martins
, Emmanuel J.N.L. Silva
, Duarte Marques
, Mário Rito Pereira
, António Ginjeira
, Rui J.C. Silva
, Francisco Manuel Braz Fernandes
, Marco Aurélio Versiani

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

Introduction: This study aimed to compare the ProTaper Universal (PTU; Dentsply Maillefer, Ballaigues, Switzerland) system with 6 replicalike instruments regarding instrument design, mechanical performance, and alloy characteristics. Methods: New rotary instruments (size 20/.07v) of PTU and 6 replicalike systems (EdgeTaper [EdgeEndo, Johnson City, TN], U-File [Dentmark, Ludhiana, India], Go-Taper Universal [Access, Shenzhen, China], Super Files [Flydent, Shenzhen, China], Multitaper [Proclinic Expert, Besançon, France], and Pluri Taper [Bestdent, Shenzhen, China]) (n = 329) were selected and evaluated regarding their design, mechanical performance, and metallurgical characteristics. The results were compared using the nonparametric Mood median test and 1-way analysis of variance with the significance level set at 0.05. Results: Replicalike instruments were similar to PTU regarding design, maximum torque to fracture (P >. 05), and ratio of nickel and titanium elements. Scanning electron microscopy revealed differences in the geometry of the tip and finishing surfaces. Time to fracture of Go-Taper Universal (50.0 seconds) was similar to PTU (44.0 seconds) (P >. 05), but the U-File (63.5 seconds), Edge Taper (87.5 seconds), and Super Files (130 seconds) showed significantly higher values (P < .05). The highest maximum torque was observed in the Super Files instrument (P < .05), but no statistical difference was noted among the other instruments (P >. 05). The angle of rotation before rupture of the Multitaper (574°) and Pluri Taper (481°) was higher than PTU (354°) (P < .05). Differential scanning calorimetric analysis showed clear differences on the transformation temperatures among the tested instruments. The R-phase start and finish temperatures of PTU were 11.0°C and −18.0°C, respectively. Conclusions: Overall, replicalike instruments were similar to PTU regarding the torsional resistance, geometric design, and near equiatomic proportions of nickel and titanium elements. In 3 of the 4 mechanical tests, the EdgeTaper (torque, angle of rotation, and bending load) and Go-Taper Universal (time to fracture, torque, and angle of rotation) systems were similar to PTU.

Original language	English
Pages (from-to)	1884-1893
Number of pages	10
Journal	Journal of Endodontics
Volume	46
Issue number	12
DOIs	https://doi.org/10.1016/j.joen.2020.08.021
Publication status	Published - Dec 2020
Externally published	Yes

Keywords

Bending load
cyclic fatigue
replicalike instrument
rotary system
torsion

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10.1016/j.joen.2020.08.021

Cite this

@article{c17568455dd74260810910e8b99ed63c,

title = "Mechanical Performance and Metallurgical Features of ProTaper Universal and 6 Replicalike Systems",

abstract = "Introduction: This study aimed to compare the ProTaper Universal (PTU; Dentsply Maillefer, Ballaigues, Switzerland) system with 6 replicalike instruments regarding instrument design, mechanical performance, and alloy characteristics. Methods: New rotary instruments (size 20/.07v) of PTU and 6 replicalike systems (EdgeTaper [EdgeEndo, Johnson City, TN], U-File [Dentmark, Ludhiana, India], Go-Taper Universal [Access, Shenzhen, China], Super Files [Flydent, Shenzhen, China], Multitaper [Proclinic Expert, Besan{\c c}on, France], and Pluri Taper [Bestdent, Shenzhen, China]) (n = 329) were selected and evaluated regarding their design, mechanical performance, and metallurgical characteristics. The results were compared using the nonparametric Mood median test and 1-way analysis of variance with the significance level set at 0.05. Results: Replicalike instruments were similar to PTU regarding design, maximum torque to fracture (P >. 05), and ratio of nickel and titanium elements. Scanning electron microscopy revealed differences in the geometry of the tip and finishing surfaces. Time to fracture of Go-Taper Universal (50.0 seconds) was similar to PTU (44.0 seconds) (P >. 05), but the U-File (63.5 seconds), Edge Taper (87.5 seconds), and Super Files (130 seconds) showed significantly higher values (P < .05). The highest maximum torque was observed in the Super Files instrument (P < .05), but no statistical difference was noted among the other instruments (P >. 05). The angle of rotation before rupture of the Multitaper (574°) and Pluri Taper (481°) was higher than PTU (354°) (P < .05). Differential scanning calorimetric analysis showed clear differences on the transformation temperatures among the tested instruments. The R-phase start and finish temperatures of PTU were 11.0°C and −18.0°C, respectively. Conclusions: Overall, replicalike instruments were similar to PTU regarding the torsional resistance, geometric design, and near equiatomic proportions of nickel and titanium elements. In 3 of the 4 mechanical tests, the EdgeTaper (torque, angle of rotation, and bending load) and Go-Taper Universal (time to fracture, torque, and angle of rotation) systems were similar to PTU.",

keywords = "Bending load, cyclic fatigue, replicalike instrument, rotary system, torsion",

author = "Martins, \{Jorge N.R.\} and Silva, \{Emmanuel J.N.L.\} and Duarte Marques and Pereira, \{M{\'a}rio Rito\} and Ant{\'o}nio Ginjeira and Silva, \{Rui J.C.\} and \{Braz Fernandes\}, \{Francisco Manuel\} and Versiani, \{Marco Aur{\'e}lio\}",

note = "Publisher Copyright: {\textcopyright} 2020 American Association of Endodontists",

year = "2020",

month = dec,

doi = "10.1016/j.joen.2020.08.021",

language = "English",

volume = "46",

pages = "1884--1893",

journal = "Journal of Endodontics",

issn = "0099-2399",

publisher = "Elsevier Inc.",

number = "12",

}

TY - JOUR

T1 - Mechanical Performance and Metallurgical Features of ProTaper Universal and 6 Replicalike Systems

AU - Martins, Jorge N.R.

AU - Silva, Emmanuel J.N.L.

AU - Marques, Duarte

AU - Pereira, Mário Rito

AU - Ginjeira, António

AU - Silva, Rui J.C.

AU - Braz Fernandes, Francisco Manuel

AU - Versiani, Marco Aurélio

PY - 2020/12

Y1 - 2020/12

N2 - Introduction: This study aimed to compare the ProTaper Universal (PTU; Dentsply Maillefer, Ballaigues, Switzerland) system with 6 replicalike instruments regarding instrument design, mechanical performance, and alloy characteristics. Methods: New rotary instruments (size 20/.07v) of PTU and 6 replicalike systems (EdgeTaper [EdgeEndo, Johnson City, TN], U-File [Dentmark, Ludhiana, India], Go-Taper Universal [Access, Shenzhen, China], Super Files [Flydent, Shenzhen, China], Multitaper [Proclinic Expert, Besançon, France], and Pluri Taper [Bestdent, Shenzhen, China]) (n = 329) were selected and evaluated regarding their design, mechanical performance, and metallurgical characteristics. The results were compared using the nonparametric Mood median test and 1-way analysis of variance with the significance level set at 0.05. Results: Replicalike instruments were similar to PTU regarding design, maximum torque to fracture (P >. 05), and ratio of nickel and titanium elements. Scanning electron microscopy revealed differences in the geometry of the tip and finishing surfaces. Time to fracture of Go-Taper Universal (50.0 seconds) was similar to PTU (44.0 seconds) (P >. 05), but the U-File (63.5 seconds), Edge Taper (87.5 seconds), and Super Files (130 seconds) showed significantly higher values (P < .05). The highest maximum torque was observed in the Super Files instrument (P < .05), but no statistical difference was noted among the other instruments (P >. 05). The angle of rotation before rupture of the Multitaper (574°) and Pluri Taper (481°) was higher than PTU (354°) (P < .05). Differential scanning calorimetric analysis showed clear differences on the transformation temperatures among the tested instruments. The R-phase start and finish temperatures of PTU were 11.0°C and −18.0°C, respectively. Conclusions: Overall, replicalike instruments were similar to PTU regarding the torsional resistance, geometric design, and near equiatomic proportions of nickel and titanium elements. In 3 of the 4 mechanical tests, the EdgeTaper (torque, angle of rotation, and bending load) and Go-Taper Universal (time to fracture, torque, and angle of rotation) systems were similar to PTU.

AB - Introduction: This study aimed to compare the ProTaper Universal (PTU; Dentsply Maillefer, Ballaigues, Switzerland) system with 6 replicalike instruments regarding instrument design, mechanical performance, and alloy characteristics. Methods: New rotary instruments (size 20/.07v) of PTU and 6 replicalike systems (EdgeTaper [EdgeEndo, Johnson City, TN], U-File [Dentmark, Ludhiana, India], Go-Taper Universal [Access, Shenzhen, China], Super Files [Flydent, Shenzhen, China], Multitaper [Proclinic Expert, Besançon, France], and Pluri Taper [Bestdent, Shenzhen, China]) (n = 329) were selected and evaluated regarding their design, mechanical performance, and metallurgical characteristics. The results were compared using the nonparametric Mood median test and 1-way analysis of variance with the significance level set at 0.05. Results: Replicalike instruments were similar to PTU regarding design, maximum torque to fracture (P >. 05), and ratio of nickel and titanium elements. Scanning electron microscopy revealed differences in the geometry of the tip and finishing surfaces. Time to fracture of Go-Taper Universal (50.0 seconds) was similar to PTU (44.0 seconds) (P >. 05), but the U-File (63.5 seconds), Edge Taper (87.5 seconds), and Super Files (130 seconds) showed significantly higher values (P < .05). The highest maximum torque was observed in the Super Files instrument (P < .05), but no statistical difference was noted among the other instruments (P >. 05). The angle of rotation before rupture of the Multitaper (574°) and Pluri Taper (481°) was higher than PTU (354°) (P < .05). Differential scanning calorimetric analysis showed clear differences on the transformation temperatures among the tested instruments. The R-phase start and finish temperatures of PTU were 11.0°C and −18.0°C, respectively. Conclusions: Overall, replicalike instruments were similar to PTU regarding the torsional resistance, geometric design, and near equiatomic proportions of nickel and titanium elements. In 3 of the 4 mechanical tests, the EdgeTaper (torque, angle of rotation, and bending load) and Go-Taper Universal (time to fracture, torque, and angle of rotation) systems were similar to PTU.

KW - Bending load

KW - cyclic fatigue

KW - replicalike instrument

KW - rotary system

KW - torsion

UR - https://www.scopus.com/pages/publications/85092014186

U2 - 10.1016/j.joen.2020.08.021

DO - 10.1016/j.joen.2020.08.021

M3 - Article

C2 - 32898557

AN - SCOPUS:85092014186

SN - 0099-2399

VL - 46

SP - 1884

EP - 1893

JO - Journal of Endodontics

JF - Journal of Endodontics

IS - 12

ER -

Mechanical Performance and Metallurgical Features of ProTaper Universal and 6 Replicalike Systems

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Keywords

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