title: Torsional strength of Gates Glidden drills exposed to clinical conditions.
abstract: Gates Glidden drills are exposed to a variety of conditions during clinical usage. These usually include canal preparation, endodontic irrigants, and sterilization procedures. All sizes 1 to 6 (n = 5/size) were tested and the torsional fracture strength determined. There were four groups (n = 30/group): group A, control; group B, sterilized 10 times; group C, exposed to 5.25% NaOCl during testing; and group D, sterilized 10 times and exposed to NaOCl during testing. Data were analyzed by ANOVA. Tukey-Kramer intervals at the 0.05 significance level were calculated. No significant differences were noted as a result of simulated clinical conditions. The larger diameter instruments had significantly higher torsional fracture strength.
authors: Division of Endodontics, Houston Biomaterials Research Center, University of Texas-Houston, Dental Branch 77030-3402, USA.
authors: T A
authors: TA
authors: Svec
authors: J M
authors: JM
authors: Powers
mesh_terms: D000704:Analysis of Variance; D003762:Dental Instruments; D008422:Materials Testing; D012388:Root Canal Irrigants; D018915:Root Canal Preparation / Q000295:instrumentation*; D012973:Sodium Hypochlorite; D013242:Sterilization; D013718:Tensile Strength; D019415:Torque
chemical_list: D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite