纳米载银无机抗菌剂对义齿基托树脂机械性能的影响

Influence of Nano-Silver Base Inorganic Antimicrobial on Mechanical Properties of Denture Base Resin

目的研究纳米载银无机抗菌剂对义齿基托树脂机械性能的影响。方法纳米载银无机抗菌剂FUMAT T200-4,按0%(对照组)、1%、2%、3%、4%、5%、7%、10%(V/V)比例添加在加热固化型义齿基托树脂中,按相关国家标准检测各组的挠度、弯曲强度、弯曲弹性模量、冲击强度,分析比较抗菌剂添加比例对基托树脂机械性能的影响。结果纳米载银无机抗菌剂的添加使义齿基托树脂的机械性能产生一定程度的变化。除挠度无影响外,随抗菌剂添加比例上升,基托树脂冲击强度和弯曲强度下降,弯曲弹性模量上升。抗菌剂添加比例为1%,基托树脂冲击强度为(7.05±1.80)kJ/m2,较对照组的(10.01±1.86)kJ/m2明显下降;当抗菌剂添加比例达到4%,基托树脂的弯曲强度为(95.96±5.05)MPa,较对照组的(108.14±9.47)MPa明显下降;当添加比例达到5%,基托树脂的弯曲弹性模量为(2 594.00±40.21)MPa,较对照组(2 533.60±62.83)MPa明显上升。结论纳米载银无机抗菌剂的添加比例要根据需要合理控制,以减小对基托树脂机械性能的影响。

Objective To explore the influence of nano-silver base inorganic antimicrobial on mechanical properties of denture base resin. Methods The experimental groups were denture base resin mixed with the nano-silver base inorganic antimicrobial FUMAT T2004, whose incorporating doses were 0% （control） , 1% ,2% ,3% ,4% ,5% , 7% and 10% （V/V）. The mechanical properties such as deflection, flexure strength, flexure modulus and impact strength were measured according to the national standards Results The mechanical properties of the nano-antimicrobial denture base resin changed partially. Although the deflection didn＇t change, the flexure strength and the impact strength decreased and the flexure modulus increased. When the incorporating dose reached 1% , the impact strength of the experimental group was （7.05 ± 1.80） kJ/m^2 , which was significantly less than the control group （ [ 10.01 ± 1.86] kJ/m^2 ）. For the 4% experimental group, the flexure strength was （95.96 ±5.05） MPa , significantly less than the control group （[108.14 ±9.47] MPa）. For the 5% experimental group, the flexure modulus was （2 594.00 ± 40.21 ） MPa, significantly more than the control group （ [ 2 533.60 ± 62.83 ] MPa）. Conclusion The incorporating dose of the nano-silver base inorganic antimicrobial must be controlled reasonably in order to minish the influence on the mechanical properties of nano-antimicrobial denture base resin.