纳米羟基磷灰石填料含量对复合树脂双键转化率的影响

The effects of inorganic filler content on the double bonds conversion of n-HA composite resin

目的:观察无机填料的含量对纳米羟基磷灰石(n-HA)复合树脂双键转化率的影响。方法:将经过硅烷偶联剂KH-570表面处理后的n-HA作为无机填料与配制好的光固化树脂基体共混,制备成复合树脂材料,并根据n-HA在复合材料中所占的比例将其分为A(45 wt%)、B(55 wt%)、C(65 wt%)、D(75 wt%)4组,同时取卡瑞斯玛光固化复合树脂作为对照(E组)。然后将5组复合树脂各制作5个试件,并分别测定各组试件的红外吸收光谱(IR),同时计算其双键转化率。结果:复合树脂材料中n-HA所占比例对其双键转化率具有一定影响,所占比例为45 wt%、55 wt%及75 wt%时,双键转化率均低于对照组及65 wt%组(P<0.05);65 wt%组与对照组双键转化率分别为(48.56±1.54)%和(45.72±0.91)%(P>0.05)。结论:纳米羟基磷灰石填料的含量可影响复合树脂的双键转化率,当n-HA含量为65 wt%时,其双键转化率最高。

AIM： To study the effects of inorganic filler content on the double bonds conversion of nano hydrxyapatite（ n-HA） composite resin. METHODS： The composite materials were composed of a visible light-curing monomer mixture as a matrix and n-HA as an inorganic filler. The surface of the n-HA particles was modified by a silane coupling agent KH-570. The quality proportion of n-HA in the composite materials was 45 wt%（ group A）,55 wt%（ group B）,65 wt%（ group C） and 75 wt%（ group D） respectively（ n = 5）,CHARISMA was served as the control group（ E）. The infra-red（ IR） spectra of composite resins was determined and the degree of double bonds conversion was calculated. Data were subjected to variance analysis. RESULTS： The double bonds conversion rate of group A,B and D was lower than that of group C and E（ P 0. 05）. The double bonds conversion rate of group C and E was（ 48. 56 ± 1. 54） % and（ 45. 72 ± 0. 91） % respectively（ P 0. 05）. CONCLUSION： The content of inorganic fillers has a certain influence on the double bonds conversion of n-HA composite resin,n-HA at 65 wt% may produce the highest double bonds conversion of n-HA composite resin.