[Effects of different sterilization methods on mechanical properties of dental fissure bureffects of different sterilization methods on mechanical properties of dental fissure bur].
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.
Dong
Gang
G
State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
Ren
Li-Bin
LB
Lü
Yun-Yi
YY
Ye
Ling
L
Li
Ji-Yao
JY
Tan
Hong
H
D003750:Dental Fissures; D003754:Dental High-Speed Equipment; D003762:Dental Instruments; D013227:Steam; D013242:Sterilization
D013227:Steam