Publication:
Effect from usage and autoclave sterilization on torsional fracture resistance of heat-treated nickel-titanium instruments: an in-vitro study

dc.contributor.authorAlshehhi, Aisha
dc.contributor.authorAlkhatib, Zuhair
dc.contributor.authorJamal, Mohamed
dc.contributor.authorEl Abed, Rashid
dc.date.accessioned2023-10-18T08:17:21Z
dc.date.available2023-10-18T08:17:21Z
dc.date.issued2023
dc.description.abstractIntroduction: This study aimed to evaluate the effect from usage and autoclaving on torsional fracture resistance of heat-treated nickel-titanium rotary instruments. ProTaper Gold F2 (PG) and TruNatomy Prime (TN) were selected. For group-N, new files were tested to make a baseline torsional resistance. For group-U, files underwent instrumentation in a J-shaped canal block, and files were tested. For group-S, files underwent instrumentation as in the group-U and followed by autoclave sterilization then were tested. Maximum torsional strength and distortion angel until fracture were measured using a customized device and toughness was calculated. Statistical analysis was conducted at the significance level of 95%. The topographic appearances of torsional fracture fragments were examined under scanning electron microscopy. PG showed significantly higher torsional strength after usage and sterilization; however, TN had reduced torsional strength (p < 0.05). PG showed significantly higher torsional strength in group-S than subgroup-N, while TN showed significantly lower torsional strength in group-U than group-N (p < 0.05). Regardless of the test conditions, PG showed significantly higher torsional strength and toughness than TN while TN had bigger distortion angle than PG (p < 0.05). The mechanical loads from usage and heat application during sterilization may result in alteration of torsional resistances according to geometry and alloy characteristics.en_US
dc.identifier.other304-2023.34
dc.identifier.urihttps://repository.mbru.ac.ae/handle/1/1357
dc.language.isoenen_US
dc.subjectFracture Resistanceen_US
dc.subjectHeat Treatmenten_US
dc.subjectNickel-Titanium Filesen_US
dc.subjectTorsional Fractureen_US
dc.subjectUsageen_US
dc.subjectSterilizationen_US
dc.titleEffect from usage and autoclave sterilization on torsional fracture resistance of heat-treated nickel-titanium instruments: an in-vitro studyen_US
dc.typeArticleen_US
dspace.entity.typePublicationen_US

Files