Influence of Sodium Hypochlorite on Mechanical Properties of K3 Nickel-Titanium Rotary Instruments

Abstract Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed the influence of sodium hypochlorite on flexural fatigue and torsional properties of nickel-titanium endodontic rotary instruments. Ne...

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Published inJournal of endodontics Vol. 33; no. 8; pp. 982 - 985
Main Authors Ormiga Galvão Barbosa, Fabiola, Antônio da Cunha Ponciano Gomes, José, Pimenta de Araújo, Marcos Cesar
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.08.2007
Subjects
Corrosion
Dental Alloys
Dental Instruments
Dental Stress Analysis
Dentistry
Endocrinology & Metabolism
Endodontic instrument
Equipment Failure
fracture
Microscopy, Electron, Scanning
Nickel
nickel-titanium
Oxidation-Reduction
Pliability
Root Canal Irrigants - chemistry
Root Canal Preparation - instrumentation
sodium hypochlorite
Sodium Hypochlorite - chemistry
Titanium
Torque
Endodontic instrument
nickel-titanium
sodium hypochlorite
fracture
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Abstract Abstract Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed the influence of sodium hypochlorite on flexural fatigue and torsional properties of nickel-titanium endodontic rotary instruments. New files and files previously exposed to sodium hypochlorite were tested for flexural fatigue and for resistance to fracture by twisting. The t test was used to compare the groups for number of cycles, angle of rotation, and maximum torque required to fracture. No statistical difference existed between these groups. Scanning electron microscopy analysis showed no evidence of localized corrosion in files exposed to sodium hypochlorite solution. These results suggest that the exposure to sodium hypochlorite has no influence on resistance to fracture of K3 rotary instruments.
AbstractList Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed the influence of sodium hypochlorite on flexural fatigue and torsional properties of nickel-titanium endodontic rotary instruments. New files and files previously exposed to sodium hypochlorite were tested for flexural fatigue and for resistance to fracture by twisting. The t test was used to compare the groups for number of cycles, angle of rotation, and maximum torque required to fracture. No statistical difference existed between these groups. Scanning electron microscopy analysis showed no evidence of localized corrosion in files exposed to sodium hypochlorite solution. These results suggest that the exposure to sodium hypochlorite has no influence on resistance to fracture of K3 rotary instruments.
Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed the influence of sodium hypochlorite on flexural fatigue and torsional properties of nickel-titanium endodontic rotary instruments. New files and files previously exposed to sodium hypochlorite were tested for flexural fatigue and for resistance to fracture by twisting. The t test was used to compare the groups for number of cycles, angle of rotation, and maximum torque required to fracture. No statistical difference existed between these groups. Scanning electron microscopy analysis showed no evidence of localized corrosion in files exposed to sodium hypochlorite solution. These results suggest that the exposure to sodium hypochlorite has no influence on resistance to fracture of K3 rotary instruments.
Abstract Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed the influence of sodium hypochlorite on flexural fatigue and torsional properties of nickel-titanium endodontic rotary instruments. New files and files previously exposed to sodium hypochlorite were tested for flexural fatigue and for resistance to fracture by twisting. The t test was used to compare the groups for number of cycles, angle of rotation, and maximum torque required to fracture. No statistical difference existed between these groups. Scanning electron microscopy analysis showed no evidence of localized corrosion in files exposed to sodium hypochlorite solution. These results suggest that the exposure to sodium hypochlorite has no influence on resistance to fracture of K3 rotary instruments.
Author Antônio da Cunha Ponciano Gomes, José
Pimenta de Araújo, Marcos Cesar
Ormiga Galvão Barbosa, Fabiola
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Keywords Endodontic instrument
nickel-titanium
sodium hypochlorite
fracture
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Snippet Abstract Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study...
Several studies have evaluated the influence of various factors on the fracture of nickel-titanium endodontic rotary instruments. The present study analyzed...
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SubjectTerms Corrosion
Dental Alloys
Dental Instruments
Dental Stress Analysis
Dentistry
Endocrinology & Metabolism
Endodontic instrument
Equipment Failure
fracture
Microscopy, Electron, Scanning
Nickel
nickel-titanium
Oxidation-Reduction
Pliability
Root Canal Irrigants - chemistry
Root Canal Preparation - instrumentation
sodium hypochlorite
Sodium Hypochlorite - chemistry
Titanium
Torque
Title Influence of Sodium Hypochlorite on Mechanical Properties of K3 Nickel-Titanium Rotary Instruments
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Volume 33
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