石膏模型消毒后物理性能及消毒效果的比较研究

发布时间：2018-06-06 18:58

本文选题：石膏模型 + 抗弯强度　；参考：《青岛大学》2008年硕士论文

【摘要】： 目的研究不同消毒方法对石膏模型物理性能的影响及消毒后的消毒效果。方法采用四种不同的消毒方法:紫外线照射、微波加热、碘伏喷雾和“84”消毒液调拌法。①制作一个50 mm×10 mm×5 mm的自凝树脂长方体模具,翻制普通硬质石膏和超硬质石膏模型各25个,选择一组作为对照组,其余各组分别用上述4种消毒方法消毒,然后测定各组的抗弯强度及表面粗糙度。②制作一个三单位固定桥金属模具,翻制普通硬质石膏和超硬质石膏模型各25个,4种方法消毒后测定其尺寸变化。③灌制两种石膏模型各25个,分别用大肠杆菌和金黄色葡萄球菌的标准菌株对其进行污染,消毒后测定抑菌率。结果①紫外线照射及“84”消毒液调拌法对两种石膏模型消毒后,模型消毒前后的抗弯强度及精度值均无显著性差异(P＞0.05)。②微波消毒后,两种石膏模型的抗弯强度与对照组有极显著性差异(P＜0.01),尺寸精度与对照组也有显著性差异(P＜0.05)。③2.5%的碘伏喷雾后,两种石膏模型的抗弯强度值有极显著性差异(P＜0.01)。④两种石膏模型的表面粗糙度在消毒前后均无显著性差异(P＞0.05)。⑤四种消毒方法对两种石膏模型消毒后,抑菌率均为100%. 结论①紫外线照射及“84”消毒液调拌法对模型的抗弯强度、尺寸精度及表面粗糙度均无明显影响,抑菌率均为100%,符合临床工作的要求,是理想的模型消毒方法。 ②微波加热及碘伏喷雾法抑菌率均为100%,但对模型的强度及精度均有明显影响,不适合模型的消毒。
[Abstract]:Objective to study the influence of different disinfection methods on the physical properties of gypsum model and the disinfection effect after disinfection.
Methods four different disinfection methods were used: ultraviolet radiation, microwave heating, iodophor spray and "84" disinfectant mixing method. (1) a 50 mm x 10 mm x 5 mm self condensing resin long cube mold was made to make the ordinary hard gypsum and the super hard gypsum model, each group was selected as the control group, and the other groups were treated with the above 4 kinds of disinfection respectively. Method disinfection, and then determine the flexural strength and surface roughness of each group. 2. Make a three unit fixed bridge metal mold, turn to the ordinary cemented gypsum and the super hard gypsum model each 25, 4 methods after disinfection to determine the size of the change. Two types of gypsum model 25, respectively, the standard of Escherichia coli and Staphylococcus aureus The strain was polluted and the bacteriostasis rate was determined after disinfection.
Results (1) there was no significant difference in bending strength and accuracy between the two kinds of gypsum models after disinfection by ultraviolet radiation and "84" disinfectant mixing method (P > 0.05). After microwave disinfection, the bending strength of two gypsum models was significantly different from that of the control group (P < 0.01), and the size accuracy was also significantly worse than that of the control group. (P < 0.05). After 2.5% iodophor spray, the flexural strength of the two gypsum models was significantly different (P < 0.01). (4) the surface roughness of the two gypsum models had no significant difference before and after disinfection (P > 0.05). 5. The bacteriostasis rate of four kinds of disinfection methods to two gypsum models were all 100%.
Conclusion (1) ultraviolet radiation and "84" disinfectant mixing method have no obvious effect on the bending strength, size accuracy and surface roughness of the model, and the bacteriostasis rate is 100%. It is in line with the requirements of clinical work and is an ideal method of model disinfection.
2. The bacteriostatic rate of microwave heating and iodophor spray method is 100%, but it has obvious influence on the intensity and precision of the model, and is not suitable for disinfection of the model.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：R187

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