一种新型丙烯酸液晶复合树脂在口腔修复中的力学性能研究

Mechanical properties of a new acrylic liquid crystal composite resin in dental prosthesis

目的合成丙烯酸液晶复合树脂并对其机械性能进行检测,为口腔材料制备和临床修复提供参考。方法丙烯酸液晶树脂基质ALCRM/TEGDMA与传统树脂基质Bis-GMA/TEGDMA中,按照80:20,70:30,60:40的质量比和纳米羟基磷灰石n-HA混合合成复合树脂(Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ型),分别检测每组树脂的压缩强度和维氏硬度。结果Ⅰ型复合树脂压缩强度、维氏硬度高于Ⅳ型,Ⅱ型高于Ⅴ型,Ⅲ型高于Ⅵ型,差异均有统计学意义(P<0.05);在Ⅰ、Ⅱ、Ⅲ型复合树脂中,Ⅱ型压缩强度、维氏硬度高于Ⅰ、Ⅲ型,差异具有统计学意义(P<0.05)。结论 ALCR M/TEGDMA基质与纳米羟基磷灰石按照70:30制备的丙烯酸液晶复合树脂压缩强度、维氏硬度优于其他比例,也明显优于同比例下Bis-GMA为基质复合树脂,符合目前口腔临床复合树脂的应用要求,具有良好的临床应用前景。

Objective To synthesize acrylic liquid crystal composite resin and detect its mechanical properties, and provide reference for clinical repair of oral materials.Methods Nano hydroxyapatite（n-HA） was added to matrix ALCRM/TEGDMA and the traditional matrix Bis-GMA/TEGDMA to synthesize acrylic liquid crystal composite resin with mass ratio of 80：20,70：30,60：40（Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ） respectively,and the compressive strength and the hardness of Vivtorinox of resins were measured.Results The compressive strength and the hardness of Vivtorinox of type I composite resin, was higher than type Ⅳ,type Ⅱ was higher than type Ⅴ,type Ⅲ was higher than type Ⅵ,and the difference was significant（P〈0.05）.In the type Ⅰ,Ⅱ,Ⅲ composite resin,the compression strength and the hardness of Vivtorinox of type Ⅱ were higher than that of type Ⅰ and Ⅲ,and the difference was significant（P〈0.05）.Conclusion The synthesize acrylic liquid crystal composed by ALCRM/TEGDMA matrix and n-HA（70：30） is superior than other proportions in the compressive strength and the hardness of Vivtorinox,also significantly better than the same ratio of Bis-GMA matrix composite resin, which is in line with the application of the oral clinical compound resin, and has a good clinical application prospect.