纳米银羟基磷灰石涂层陶瓷托槽的力学及抗菌性能研究

发布时间：2018-03-12 10:00

本文选题：纳米银　切入点：羟基磷灰石　出处：《中国人民解放军医学院》2014年硕士论文　论文类型：学位论文

【摘要】：目的：研制纳米银羟基磷灰石涂层陶瓷托槽,并研究其力学性能及其涂层的表面特性、银离子缓释能力和抗菌性能。方法：采用微束等离子喷涂法制备纳米银羟基磷灰石涂层陶瓷托槽并研究其涂层的表面特性；选择40颗由正畸需求拔除的健康前磨牙，随机分为两组，每组20颗，分别为实验组和对照组，实验组粘接涂层陶瓷托槽，对照组粘接普通陶瓷托槽，随后对两组分别实施剪切力测试，记录其抗剪切强度值（SBS）和粘接剂残留指数（ARI）；选取6个纳米银羟基磷灰石涂层陶瓷托槽及6个普通陶瓷托槽，采用电感耦合等离子发射光谱法（ICP-AES）测定其在人工唾液中第1、3、7、14、21d的银离子缓释量，，并用覆膜法测试涂层的抗变形链球菌性能。结果： 1.该新型抗菌陶瓷托槽涂层稳定性较好，厚度均匀：约100μm，其SBS值为7.34±1.72MPa，满足临床需求，ARI指数均值为1.45。SBS和ARI指数与对照组相比均减小，且均具有显著统计学差异(P0.01)。 2.涂层银离子缓释浓度随着时间的延长逐渐增加，缓释速度随时间的推移而减缓，于第14天基本达到稳定，抗菌率为99.9%。结论：此纳米银羟基磷灰石涂层陶瓷托槽的涂层性能良好，力学性能达到标准，满足正畸临床需求,且可降低去除陶瓷托槽时釉质损伤的概率；涂层缓释银的能力较好，具有较强抗变形链球菌能力,可预防正畸过程中牙釉质脱矿。
[Abstract]:Objective: to study the mechanical properties of nano-silver hydroxyapatite coated ceramic brackets and their surface properties. Methods: Nano-silver hydroxyapatite coated ceramic brackets were prepared by microbeam plasma spraying and their surface properties were studied. 40 healthy premolars which were removed by orthodontics were selected. Two groups were randomly divided into two groups: experimental group (n = 20) and control group (n = 20). The shear strength (SBS) and the residual index of adhesives were recorded, and six nano-silver hydroxyapatite coated ceramic brackets and six ordinary ceramic brackets were selected. The slow release of silver ions in artificial saliva was determined by inductively coupled plasma emission spectrometry (ICP-AESs) and the resistance to streptococcus mutans was measured by film mulching method. Results:. 1. The new antibacterial ceramic bracket coating has good stability and uniform thickness: about 100 渭 m, its SBS value is 7.34 卤1.72 MPa, the average value of ARI index is 1.45.SBS and ARI index is decreased compared with the control group, and there is significant statistical difference (P 0.01). 2. The slow release concentration of silver ion in the coating increased with time, and the slow release rate slowed down with the passage of time. On the 14th day, the slow release rate of silver ion was stable, and the antibacterial rate was 99.9%. Conclusion: the nano-silver hydroxyapatite coated ceramic bracket has good performance, meets the standard of mechanical properties, meets the clinical requirements of orthodontics, and can reduce the probability of enamel damage in the ceramic bracket, and the ability of slow release silver coating is better. It can prevent enamel demineralization during orthodontic treatment because of its strong ability to resist streptococcus mutans.
【学位授予单位】：中国人民解放军医学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.5

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