义齿清洁剂对热固化型基托树脂物理及机械性能的影响

摘要

Objective To evaluate the colour stability,surface roughness and flexural strength of heat-curing denture base resin after using five denture cleansers.Methods Samples were prepared from heat-curing denture base resin and immersed in Polident,Victoria-C,Protefix,0.2% chlorhexidine gluconate ,Y-Kelin denture cleansers and distilled water.The color changes(ΔE),the roughness and the flexural strength were then measured.Results The color changes were significantly greater in the 0.2% chlorhexidine gluconate, Y-Kelin denture cleansers than in the control group.The ΔE values quantified by the NBS(National Bureau of Standards)were classi-fied as slight in all groups.When comparing the surface roughness and flexural strength,no statistically significant difference was found among the different immersion procedures.Conclusions Immersion in 0.2% chlorhexidine gluconate and Y-Kelin denture cleansers influenced the color stability of heat-curing denture base resin after a 180-day use,but it was clinically acceptable.Polident,Victoria-C, Protefix did not influence the properties.%目的：评价5种义齿清洁剂对热固化型基托树脂颜色稳定性、表面粗糙度、弯曲强度的影响。方法热固化型基托树脂试样浸泡于保丽净、澳多-C、Protefix、0．2％葡萄糖酸氯己定、雅克菱义齿清洁剂以及蒸馏水中一段时间后测量试样颜色的改变（ΔE）、粗糙度值、弯曲强度。结果0．2％葡萄糖酸氯己定、雅克菱义齿清洁剂对颜色改变较对照组显著较大；将ΔE值用 NBS（美国国家标准局）单位来表示，所有组对应的人色差感觉程度均为感觉轻微。对于表面粗糙度和弯曲强度，不同浸泡处理组间无统计学差异。结论热固化型基托树脂使用义齿清洁剂180 d 后，0．2％葡萄糖酸氯己定、雅克菱浸泡后颜色稳定性较差，但为临床可接受。保丽净、澳多-C、Protefix 对材料均无影响。