SODIUM HYPOCHLORITE'S EFFECT ON NICKEL-TITANIUM ROTARY INSTRUMENTS AND ITS EFFECT ON RESISTANCE TO FRACTURE

The purpose of this study was to examine the effect of partial and total immersion in sodium hypochlorite on nickel-titanium rotary files and to determine whether resistance to fracture was influenced by the immersion time. One hundred K3™ and 100 ProFile® rotary files were either partially or totally immersed in 5.25% sodium hypochlorite for zero, one, five, thirty, or sixty minutes. After immersion, files were subjected to cyclic fatigue testing. Time to fracture was recorded and analyzed by a two-way ANOVA. Tukey's honest significant difference was used to identify any differences in immersion times. Within all ProFile groups and partial immersion K3 groups, there was no significant decrease in time to fracture with increased immersion time in sodium hypochlorite. Only the K3 total immersion groups revealed a significant decrease in time to fracture with increased immersion time in sodium hypochlorite.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Endodontics

Year dc:date.available

2007

Author dc:creator

• Smith, Michael Shane

Contributors dc:contributor

• Dr. Karan J. Replogle

• corrosion products
• total immersion
• partial immersion
• chemical sterilization
• NiTi
• cyclic fatigue testing
• cyclic fatigue
• endodontic instruments
• endodontic rotary files
• NaOCl
• Dentistry
• Endodontics and Endodontology
• Medicine and Health Sciences

Statement dc:rights

• © The Author

Identifier

https://scholarscompass.vcu.edu/etd/941

OAI identifier oai:identifier

oai:scholarscompass.vcu.edu:etd-1940