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Of chlorine dioxide spraying disinfection of alginate impression model accuracy

Author: RenMin
Tutor: LuoXiaoJin
School: Shanxi Medical
Course: Clinical Stomatology
Keywords: Measuring Chlorine dioxide Alginate impression Spraying Accuracy
CLC: R783.6
Type: Master's thesis
Year: 2008
Downloads: 36
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Abstract

Objective: To understand the different effective bactericidal concentration of chlorine dioxide solution spraying disinfection of alginate impression model accuracy for clinical impression disinfection feasibility basis. Methods: The experiment was divided into two parts to complete the first part of the detection reliability of the measurement system: 59mm × 16mm × 16mm standard test pieces made an impression 20 cases, with ultra-anhydrite made irrigation type. Measure the sample number with a vernier caliper and coordinate measuring machine plaster model for each sample length, width, height three measurement items. Interval of 10 days by the same operator using a coordinate measuring machine secondary sample measurement, manual measurement and coordinate measuring machine measuring each line from the results whether the differences, and to compare the two coordinate measuring machine measuring whether the differences. The second part of the different concentrations of chlorine dioxide spray disinfection of alginate impression of the accuracy of the model: 1. 59mm x 16mm x 16mm standard specimen preparation impression. Experiment was divided into five disinfection treatment group, were sentenced to 20000mg / L glutaraldehyde solution for disinfection 20min, 000 mg / L 84 disinfectant disinfection 20min, 550 mg / L of chlorine dioxide disinfectant spray disinfection into a closed environment in 30min 700 mg / L of chlorine dioxide disinfectant spray disinfection into a confined environment, 20min, 900 mg / L of chlorine dioxide disinfectant spray disinfection placed in a confined environment, 10min, does not deal with the group as a control group. Coordinate measuring machine in the horizontal and vertical analysis to the two dimensional changes of the irrigation system, a model of an impression after disinfection treatment, accuracy up to 0.001mm. The experimental results with SPSS11.0 statistical package for statistical analysis. 2 standard maxillary the resin teeth model system impression. Grouping, disinfected, irrigation system model ibid. Change the size of the model analysis of an impression after disinfection irrigation system using vernier caliper, precise degree of 0.02mm. The experimental results were statistically analyzed using SPSS 11.0 statistical package. Results: manual measurement and coordinate measuring machine to measure the plaster model of the sample line from the value of the difference between the average number of less than 0.1mm, the two measurements, P values ??were greater than 0.05, there is no significant difference between the two; coordinate measurement of the difference between the measurement results of the machine twice by paired t-test showed no significant difference. (2) two different measuring instruments to measure the different plaster model, the results showed 20000mg / L glutaraldehyde and 1000 mg / L 84 disinfectant soak for 20 minutes, compared with the control group in the horizontal to the vertical are significant differences, produce statistically significant dimensional change (P <0.05). Control group with different concentrations of chlorine dioxide spray disinfection, there was no significant difference (p> 0.05). Conclusion: 1. Coordinate measuring machine has the advantages of precise, simple, efficient, measuring content-rich, complete, intuitive, can be used for the measurement of dimensional change in the rules plaster model. (2) the higher the concentration of chlorine dioxide, the sterilization time is shorter. 550 mg / L of chlorine dioxide disinfectant spray disinfection in an airtight container for 30 min, 700 mg / L chlorine dioxide disinfectant spray disinfection in an airtight container 20min, 900 mg / L chlorine dioxide disinfectant spray disinfection into the airtight container 10min shall not affect the accuracy of the prosthesis made clinical use can be selected according to different requirements. (3) the impact of three different concentrations of chlorine dioxide solution spray disinfection of the accuracy of the model of alginate impression than 20000mg / L glutaraldehyde and 1000 mg / L 84 are small, use the lowest concentration, and does not produce a pungent odor, side effects minimum under the same conditions can be preferable.

Of chlorine dioxide spraying disinfection of alginate impression model accuracy

Abstract

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