The comparison of different methods in controlling cross infection in dental units

doi:10.3877/cma.j.issn.1674-1366.2015.05.013

Abstract

Abstract:

Objective

To investigate the effective methods in controlling cross infection of the hand contact area of dental units.

Methods

Ten dental units are randomly selected in outpatient department. The dental units are randomly divided into an experiment group and a control group, and each group has 5 chairs. Sterilization and disposable covers are used in the experiment group. Sterilization only is used in control group. Thirty samples are randomly taken in each group before and after infection control. The difference of bacteria colony number, operation time and cost effectiveness are compared between 2 groups before and after infection control.

Results

Both methods can effectively control cross infection. The comparisons between control group and test group in bacteria colony number before cross infection control (t = -0.775, P = 0.338) , bacteria colony number after cross infection control (t = 0.383, P = 0.845) and cost accounting (t = -1.726, P = 0.421) were not statistically significant. The operation time of experiment group is longer than the control group (t = 24.190, P = 0.000) , and it′s of statistical difference.

Conclusions

Both methods can control the cross infection in the hand contact area of dental units. Sterilization and disposable covers method can reduce the secondary pollution of aerosol. The sterilization method is more time saving and more convenient.

Key words: Dental unit, Cross infection, Sterilization, Disposable cover

Yuena Chen, Menghuan Li, Liting Lin, Xueling Zhang, Peiming Gu, Weishu Qi. The comparison of different methods in controlling cross infection in dental units[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2015, 09(05): 417-419.

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References 8

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组别	例数	控感前菌落数（CFU/cm²）	控感后菌落数（CFU/cm²）	操作时间（s/次）	成本核算（元/人）
实验组	30	39.41 ± 2.74	1.73 ± 0.34	10.99 ± 1.00	0.61 ± 0.03
对照组	30	39.96 ± 2.80	1.70 ± 0.43	5.50 ± 0.74	0.60 ± 0.00
t值	?	-0.775	0.383	24.190	-1.726
P值	?	0.338	0.845	0.000	0.421

组别	例数	控感前菌落数（CFU/cm²）	控感后菌落数（CFU/cm²）	操作时间（s/次）	成本核算（元/人）
实验组	30	39.41 ± 2.74	1.73 ± 0.34	10.99 ± 1.00	0.61 ± 0.03
对照组	30	39.96 ± 2.80	1.70 ± 0.43	5.50 ± 0.74	0.60 ± 0.00
t值	?	-0.775	0.383	24.190	-1.726
P值	?	0.338	0.845	0.000	0.421

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