人工唾液环境混合陶瓷摩擦磨损行为研究  

Evaluation of friction and wear behavior of hybrid ceramics under artificial saliva environment

作　　者：张倩倩 高姗姗[1] 于海洋[1] 岳莉[1] ZHANG Qian-qian;GAO Shan-shan;YU Hai-yang;YUE Li(State Key Laboratory of Oral Diseases,National Clinical Research Center for Oral Diseases,West China Hospital of Stomatology,Sichuan University,Chengdu 610041,China)

机构地区：[1]四川大学华西口腔医学院口腔疾病研究国家重点实验室国家口腔疾病临床医学研究中心,成都610041

出　　处：《口腔颌面修复学杂志》2021年第6期401-405,440,共6页Chinese Journal of Prosthodontics

基　　金：国家自然科学基金面上项目(项目编号:81571006)。

摘　　要：目的:探究人工唾液环境下两种椅旁混合陶瓷树脂渗透陶瓷(PICN)和树脂纳米瓷(RNC)的摩擦磨损行为。方法:采用纳米力学测试仪对PICN、RNC和牙釉质进行压入测试和蠕变测试,评估材料的纳米力学性能和粘弹性性能。采用微动摩擦磨损测试仪对PICN、RNC和牙釉质在人工唾液环境下进行磨损测试,测试参数如下:法向载荷(Fn)为50N,往复幅度(D)为500μm,往复频率(F)为2Hz,循环次数(N)为10,000次。通过白光干涉三维形貌仪获得磨损深度,扫描电子显微镜观察磨斑形貌和损伤特征,分析磨损机制及耐磨损性。结果:平均弹性模量和塑性指数均为牙釉质>PICN>RNC,弹性回复率为RNC>PICN>牙釉质,人工唾液环境下最大磨损深度为PICN>RNC>牙釉质。结论:与RNC相比,PICN的纳米力学性能和粘弹性性能更接近牙釉质。两种混合陶瓷的耐磨性都小于牙釉质的耐磨性,但RNC的耐磨性与牙釉质的耐磨性更匹配,这可为临床选择修复材料提供参考。Objective:To evaluate wear resistance of two kinds of dental chair side hybrid ceramics(PICN and RNC)under artificial saliva environment.Methods:Nanoindentations were applied on PICN,RNC and enamel samples using the nanomechanical tester equipped with a Berkovich diamond tip.In vitro two-body wear tests were performed with the ball-on-flat configuration using a reciprocal horizontal fretting tribometer under artificial saliva environment.The load force(50 N),the reciprocating amplitude(500μm),the frequency(2 Hz)and the test cycle(10,000 cycles)were selected as the test parameters.Wear scars were observed by 3-D profile microscopy and scanning electron microscope(SEM).Results:Elastic modulus and plasticity index are both enamel>PICN>RNC,and elastic recovery rate is RNC>PICN>enamel.The maximum wear depth under artificial saliva environment is PICN>RNC>enamel.Conclusion:Compared with those of RNC,the nanomechanical properties and viscoelastic properties of PICN are closer to enamel.Wear resistance of the investigated hybrid ceramics is enamel>RNC>PICN,providing references for clinical selection of restoration materials.

关 键 词：混合陶瓷 摩擦磨损 纳米力学性能 粘弹性性能 人工唾液环境 

分 类 号：R783.1[医药卫生—口腔医学]