摘要
背景:复合树脂是口腔临床常用的充填和黏结材料,其中大量的无机填料对复合树脂的机械和生物学性能有着重要的影响,纳米含锶磷灰石作为复合树脂添加物的研究尚未见报道。目的:观察含锶量和分散剂对纳米含锶磷灰石制备的影响,以及含锶填料对牙科复合树脂机械性能的影响。方法:以氯化锶、硝酸钙、磷酸二氢铵为原料水热法制备纳米含锶磷灰石粉末,采用X射线衍射、红外光谱、透射电镜观察其结构和表面特征,并观察硅烷化处理的含锶填料对复合树脂挠曲强度和压缩强度的影响。结果与结论:成功制备了低结晶性的针状纳米含锶磷灰石,纳米含锶填料添加比为60%时复合树脂的综合力学性能最好,其挠曲强度和压缩强度分别为(92.459±3.285)MPa和(150.573±4.706)MPa。提示纳米含锶填料的加入能改善牙科复合树脂的机械性能。
BACKGROUND：Composite resin is a common material used for clinical oral filling and bonding,in which a large number of inorganic fillers play an important role in the mechanical and biological properties of composite resin.It has not been reported that strontium-substituted hydroxyapatite nanoparticles are used as composite resin additives.OBJECTIVE：To observe the effects of strontium content and dispersant on preparation of strontium-substituted hydroxyapatite nanoparticles and the effects of strontium-substituted hydroxyapatite nanoparticles on the mechanical properties of dental composite resin.METHODS：Strontium-substituted hydroxyapatite nanoparticles were prepared from strontium chloride,calcium nitrate,ammonium dihydrogen phosphate as raw materials by hydrothermal method.Its structure and surface characteristics were observed by X-ray diffraction,infrared spectroscopy,transmission electron microscopy,and the effects of silylation strontium-substituted hydroxyapatite nanoparticles on flexural strength and compressive strength of composite resin were observed.RESULTS AND CONCLUSION：Low-crystalline needle-like strontium-substituted hydroxyapatite nanoparticles were successfully prepared.Composite resin had the best mechanical properties with 60% strontium-substituted hydroxyapatite nanoparticles,with its flexural strength of （92.459±3.285） MPa and compressive strength of （150.573±4.706） MPa.It is indicated that strontium-substituted hydroxyapatite nanoparticles can improve the mechanical properties of dental composite resin.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2010年第38期7124-7128,共5页
Journal of Clinical Rehabilitative Tissue Engineering Research
基金
福建省科技厅青年科技人才创新项目(2007F3031)"新型无机纳米填料牙本质粘结剂复合材料的制备与性能研究"
