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Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study

Authors: Saeed , Mohammad , OLARINMOYE Ayodeji , Ali Alrahlah

Publication Type: Journal article

Journal: Metals

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Abstract

This study investigated the cyclic fatigue resistance of three brands of nickel-titanium
rotary files—Unicone (size 25 0.06; Medin), Navigator Evo (W-4; size 25 0.06; Medin) and Protaper
Next (X2; size 25 0.06 Dentsply Tulsa Dental)—in reciprocating and continuous motion, during
artificial canal instrumentation. Seventy-two samples—Unicone (n = 24), Navigator Evo (n = 24),
and Protaper Next (n = 24)—each measuring 25 mm in length, were allocated to reciprocating (n =
36) and continuous motion (n = 36) experimental subgroups, and rotated in a simulated steel curved
canal until fracture occurred. Fracture times and fragment lengths of samples in the experimental
subgroups were recorded. One of the Unicone, Navigator Evo and Protaper Next fractured samples
was randomly selected and analyzed for topographic characteristics by using scanning electron
microscopy. Times to fracture and fragment lengths of samples were evaluated by analysis of
variance and Tukey’s tests. Independent sample t test was used to compare mean values between
the different groups. Protaper Next samples displayed significantly higher resistance to cyclic
fatigue in reciprocating motion than Unicone and Navigator Evo samples (p < 0> samples exhibited the least fracture-resistant in continuous and reciprocating motion.

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Saeed,A. Mohammad,A. OLARINMOYE,A. Ali,A. . (2019). Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study, 10 (), 1-1.

Saeed,A. Mohammad,A. OLARINMOYE,A. Ali,A. . "Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study" 10, no (), (2019): 1-1.

Saeed,A. and Mohammad,A. and OLARINMOYE,A. and Ali,A. and . (2019). Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study, 10 (), pp1-1.

SaeedA, MohammadA, OLARINMOYEA, AliA, . Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study. 2019, 10 ():1-1.

Saeed,Alqahtani , Mohammad,Al-omari , OLARINMOYE,Ayodeji , and Ali,Alrahlah . "Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study", 10 . (2019) : 1-1.

S.Alqahtani M.Al-omari O.Ayodeji & A.Alrahlah , "Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study" vol.10, no., pp. 1-1, 2019.

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