【摘要】 目的:观察口腔石膏模型经二氧化氯(SCD)浸泡消毒后尺寸精度的变化。方法:采用特制母模灌注石膏Ⅲ、Ⅳ、Ⅴ型各90个,各型分成9组,每组10个,每组经浓度为3.71 mmol/L、7.41 mmol/L、11.12 mmol/L的SCD消毒液浸泡5 min、10 min、15 min后,用外径千分尺测量石膏模型消毒前后的尺寸,所得均数差值进行统计学分析。结果:3种常用石膏模型的精度在SCD同一浓度下,经过5 min、10 min、15 min时间段浸泡消毒后的数据均无统计学意义(P>0.05),并且其精度在同一时间段不同浓度的SCD浸泡后的数据在统计学上也均无统计学意义(P>0.05)。结论:SCD消毒液对常用口腔石膏模型尺寸精度均无影响。更多还原

【Abstract】 Objective: To evaluate the changes in dimensional accuracy of dental gypsum casts after immersion in stable chlorine dioxide(SCD) disinfectant solution.Methods: Each of 90 specimens was made of type Ⅲ,type Ⅳ and type Ⅴ dental stone,respectively,which were further divided into 9 groups(n=10).The gypsum casts were immersed in 3.71,7.41 and 11.12 mmol/L SCD disinfectant solution for 5,10 and 15 min,respectively.The dimensional accuracy of dental gypsum casts were measured with outside diameter in micrometer before and after immersion.The data were analyzed using analysis of variance(ANVOA) at 95% confidence level.Results: There were no significant changes in dimensional accuracy of all dental gypsum casts treated by same concentration of SCD solution for 5,10 and 15 min.And the dimensional accuracy of all dental gypsum casts treated with different concentrations of SCD for the same duration did not change.Conclusion: SCD disinfectant solution has no impact on dimensional stability of dental gypsum casts.更多还原