中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (26): 4143-4148.doi: 10.3969/j.issn.2095-4344.2017.26.008

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

光固化含氟牙科复合树脂的性能

王  璞1,程  洁2
  

  1. 1河北医科大学第二医院口腔修复科,河北省石家庄市  050000;2河北省人民医院口腔科,河北省石家庄市  050000
  • 收稿日期:2017-04-03 出版日期:2017-09-18 发布日期:2017-09-28
  • 通讯作者: 王璞,河北医科大学第二医院口腔修复科,河北省石家庄市 050000
  • 作者简介:王璞,女,1981年生,山东省日照市人,硕士,主治医师,主要从事口腔修复研究。

Properties of light-cured fluorine-containing resin

Wang Pu1, Cheng Jie2
  

  1. 1Department of Prosthodontics, Second Affiliated Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China; 2Department of Stomatology, Hebei Provincial People’s Hospital, Shijiazhuang 050000, Hebei Province, China
  • Received:2017-04-03 Online:2017-09-18 Published:2017-09-28
  • Contact: Wang Pu, Department of Prosthodontics, Second Affiliated Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China;
  • About author:Wang Pu, Master, Attending physician, Department of Prosthodontics, Second Affiliated Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China;

摘要:

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文题释义:
牙科充填复合材料:是由高分子基质、无极填料、发光引发剂体系组成的复合物,目前商业用牙科充填复合材料主要由聚双甲基丙烯酸脂基质、二氧化硅填料及光引发体系组成,其机械性能、稳定性、生物毒性和生物相容性是衡量牙科充填复合材料的主要依据。
光固化含氟牙科复合树脂的特性:①制品制作周期短:对于传统的工艺来说,模具的设计到产品的生产所需要的周期较长,利用光固化快速成型技术则需要数小时或数周;②智能化程度高:能明显节省劳动力。光固化技术相对稳定,更多的以计算机控制为主,可实现单人操作完成;③获得材料的尺寸精度较高:部分材料的加工精度能精确到0.05 mm;④环境友好:光固化含氟牙科复合树脂在制备过程中不会对环境产生明显影响,机械设备不会产生噪声;⑤易于制造复杂样件。
 
背景:光固化含氟牙科复合材料中的氟能减少和预防龋齿发生,能长期发挥防蛀效果,但有关该材料的制备方法及性能尚缺乏报道。
目的:研究光固化含氟科复合树脂的制备方法及性能。
方法:将催化剂三乙胺、双酚S、双甲基丙烯酸二缩三乙醇酯、三氟乙酸酐及不同质量分数(5%、10%、15%、20%)的无机填料(改性二氧化硅、羟基磷灰石或二氧化钛)混合,制备光固化含氟科复合树脂材料,检测光固化含氟科复合树脂的拉伸强度、弯曲模量、聚合转化率及吸水率,透射电镜观察其形态。
结果与结论:①相同质量分数下,羟基磷灰石组拉伸强度高于二氧化硅组(P < 0.05),二氧化钛组拉伸强度显著高于二氧化硅组、羟基磷灰石组(P < 0.05);相同质量分数下,羟基磷灰石组与二氧化钛组弯曲模量比较差异无显著性意义(P > 0.05),二氧化硅组弯曲模量显著高于羟基磷灰石组、二氧化钛组(P < 0.05);②相同质量分数下,二氧化硅组与羟基磷灰石组聚合转化率比较差异无显著性意义(P > 0.05),二氧化钛组聚合转化率大于二氧化硅组、羟基磷灰石组(P < 0.05);③随着改进材料质量分数的不断增加,光固含氟牙科复合树脂材料的吸水率不断增加;④透射电镜显示,二氧化硅组断裂面相对平整,树脂机体与填料之间具备良好的生物相容性;羟基磷灰石组断裂面较粗糙,高低起伏明显,生物相容性相对较差;二氧化钛组断裂面形成分层,填料在树脂机体中发生沉降,二氧化钛颗粒沉附在树脂底部,产生较大的空洞和填料颗粒,生物相容性较差;⑤结果表明:光固化含氟科复合树脂具有良好的力学性能、固化性能及吸收率。

关键词: 生物材料, 口腔生物材料, 牙科充填复合材料, 制备方法, 抗弯曲性能, 双键转化性能, 平衡吸水率, 结构表征, 二氧化硅, 羟基磷灰石, 二氧化钛

Abstract:

BACKGROUND: Fluorine used for light-cured fluorine-containing resin can reduce and prevent dental caries, as well as play a long-term effect against tooth decay. However, there are rare reports on the composite preparation and performance.
OBJECTIVE: To study the preparation and performance of the light-cured fluorine-containing resin.
METHODS: Triethylamine as a catalyst, bisphenol A, bisphenol S, glycidyl methacrylate, trifluoroacetic anhydride and inorganic fillers (modified silicon dioxide, hydroxyapatite or titanium dioxide at mass fraction of 5%, 10%, 15%, 20%) were mixed to prepare the light-cured fluorine-containing resin. Then, the tensile strength, bending modulus, polymerization conversion and water of the composites were tested, and the morphology of the resin was observed under transmission electron microscope.
RESULTS AND CONCLUSION: At the same mass fraction, the tensile strength was highest in the titanium dioxide group, higher in the hydroxyapatite group, and lowest in the silicon dioxide group (P < 0.05). At the same mass fraction, there was no difference in the bending modulus between the titanium dioxide group and the hydroxyapatite group (P > 0.05), while the bending modulus in the silica group was significantly higher than that in the other two groups (P < 0.05). At the same mass fraction, the polymerization conversion of the composite resin was higher in the titanium dioxide group than the hydroxyapatite and silicon dioxide groups (P < 0.05), but there was no difference between the latter two groups (P > 0.05). With the increasing of mass fraction, the water absorption of the composite resin kept an increasing trend. Under the transmission electron microscope, the fracture surface of the silicon dioxide group was relatively flat, and the resin body exhibited good biocompatibility with the filler; in the hydroxyapatite group, the fracture surface was rough with obvious ups and downs, and the biocompatibility between the resin body and the filler was relatively poor; in the titanium dioxide group, the fracture surface was layered and the filler settled in the resin body, and moreover, titanium dioxide particles were deposited on the bottom of the resin, resulting in larger voids and filler particles as well as poor biocompatibility. To conclude, the light-cured fluorine-containing resin has good mechanical properties, curable properties and absorption rate. 

Key words: Dental Materials, Bisphenol A-Glycidyl Methacrylate, Silicon Dioxide, Tissue Engineering

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