ABSTRACT
Objective To compare drying methods for dental handpiece,and to provide references and guidance for choosing appropriate handpiece drying methods.Methods Four groups were established according to different methods of drying:vacuum drying,compressed air dryer drying,entire automatic hot cleaner drying,and sterilizing machine drying.Four types (with 50 in each type)of handpieces with the same brand were selected:low-speed straight (EX-6C),low-speed bender (NAC-EC),high speed turbine fast handset,and high speed turbine four hole handset.After cleaning and disinfection,each handpiece was subjected to the aforementioned four drying methods,and the mass was recorded before and after drying.SPSS software was used to calculate and compare the drying rate among these drying methods by analysis of variance.Results There were significant differences in the drying rate among four drying methods(P＜0.01).The drying efficiency with vacuum drying was higher than the other three methods.The mean drying efficiency for four types of dentistry handset with vacuum drying method were as follows:low-speed straight(EX-6C)69.93％,low-speed bender(NAC-EC)93.21％,high speed turbine fast handset 92.70％,and high speed turbine four hole handset 94.27％.Conclusion The drying efficiency of vacuum drying method for handset is superior to the other three drying methods.
ABSTRACT
Objective To investigate the method of the operation of the tube type,improve the drying efficiency,and control the occurrence of infection in hospital,reduce the energy consumption.Methods Devices with full automatic washing machine washing out the lumen of 600 pieces were divided into control group and two experimental group by random digital table method each group was 200 pieces,respectively,and using dumped water before drying,luminal devices placed in different position and different container among the three groups in 90 ℃ drying 30 minutes after lumen devices to compare the drying effect.Results At the dry temperature 90℃,the same drying time of 30 minutes,the rate of drying qualified of the experimental group 2 was 100.0％ (200/200),which was higher than 82.5％ (165/200) of the experimental group 1,the difference was statistically significant (x2=38.356,P ＜ 0.05);and also higher than 21％ (42/200) of the control group,the difference was statistically significant (x2=261.157,P ＜ 0.05).Conclusions The new drying operation method can improve the drying efficiency of the tube type,and control the risk of inffection in the hospital.