title: [Effects of different sterilization methods on mechanical properties of dental fissure bureffects of different sterilization methods on mechanical properties of dental fissure bur].
abstract: OBJECTIVE
  The purpose was to analyze the effects of three sterilization methods (dry heat sterilization, steam sterilization, and chemical sterilization) on the corrosion of dental fissure bur.
  
  
  METHODS
  200 dental fissure burs were distributed to 10 groups. Bending strength, elastic modulus, and torsional strength were measured by bending and torsional instrument and calculated with special designed software. Among the three sterilization methods, the steam sterilization group showed the most evident.
  
  
  RESULTS
  The corrosion was most severe in steam sterilization group, followed by chemical sterilization, dry heat sterilization. With the sterilization time increased, bending strength, elastic modulus, and torsional strength decreased respectively. Of the three sterilization methods, the mechanical properties were decreased most evidently by steam sterilization, followed by chemical sterilization and dry heat sterilization.
  
  
  CONCLUSIONS
  It is proved that the bending strength, elastic modulus and torsional strength have a tight relationship with the corrosion of dental fissure burs. The corrosion was most severe in steam sterilization group, followed by chemical sterilization, dry heat sterilization. In regards of the corrosive effect, the dry heat sterilization might be the best way to sterilize the dental fissure burs.
authors.affiliation: State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Dong
authors.forename: Li-Bin
authors.initials: LB
authors.lastname: Ren
authors.forename: Yun-Yi
authors.initials: YY
authors.lastname: Lü
authors.forename: Ling
authors.initials: L
authors.lastname: Ye
authors.forename: Ji-Yao
authors.initials: JY
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Tan
mesh_terms: D003750:Dental Fissures; D003754:Dental High-Speed Equipment; D003762:Dental Instruments; D013227:Steam; D013242:Sterilization
chemical_list: D013227:Steam