口腔医学研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (7): 705-707.

• 临床研究论著 • 上一篇    下一篇

酸碱度对Vitallium与钴铬合金卡环疲劳强度影响的比较

张瀚方1,谢伟丽1*,高华东1,谢琪1,王鹏义2,樊久铭3,刘一志3   

  1. 1. 哈尔滨医科大学口腔医学院口腔修复科 黑龙江 哈尔滨 150001;
    2. 解放军第521医院口腔科;
    3.哈尔滨工业大学航天科学与力学系
  • 收稿日期:2014-12-29 出版日期:2015-07-28 发布日期:2015-07-28
  • 通讯作者: 谢伟丽,电话:0451-85553231
  • 作者简介:张瀚方(1989~ ),女,锡伯族,黑龙江人,硕士,主要从事口腔材料学方面的研究。
  • 基金资助:
    黑龙江省科技攻关项目(编号:GC12C305-3)

Effect of pH on the Fatigue Strength of Vitallium and Co-cr Clasps

ZHANG Han-fang, XIE Wei-li, GAO Hua-dong, et al   

  1. Department of Prosthodontics, the Affiliated Stomatology Hospital of Harbin Medical University, Harbin 150001
  • Received:2014-12-29 Online:2015-07-28 Published:2015-07-28

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摘要： 目的:比较高钴铬钼合金(Vitallium 2000 plus,V)与钴铬合金(WBA,W)卡环臂在不同酸碱度下相同形变及循环次数时的疲劳衰减。方法:分别铸造V与W直型卡环臂20个,分别置于空气和pH值4.0、6.7和8.0的人工唾液中。用万能试验机进行0.8 mm变形的循环加载20000次,得到载荷-时间曲线算出试件的衰减百分数。扫描电镜观察表面。结果:W各组衰减均高于V,在空气中衰减最小,随实验组pH值增大试件衰减增大;V在pH=4组衰减最多。结论:使用Vitallium 2000 plus铸造可摘局部义齿的卡环可保持更长时间的初始修复效果。

关键词: 衰减, 卡环, 酸碱度, 疲劳

Abstract: Objective: To compare fatigue attenuation of high Co-Cr-Mo alloy and Co-Cr alloy clasps which were in the same deformation and cyclic number under different pH values. Methods: V and W were used to cast twenty straight clasps respectively which were divided into 4 groups and tested in the air and in the artificial saliva of pH equal to 4.0,6.7 and 8.0 separately.Then the load-deformation test was carried on specimens to get terminal load as a percentage of initial load with the universal testing machine for 0.8 mm deformation and condition of cyclic loading 20000 times. Surfaces were examined by SEM. Results: The attenuation of W group was higher than that of V group. The minimum ones was in the air. And specimen attenuation increased with increment of experimental pH value. The attenuation of V was the most in the pH=4 group. Conclusion: Using Vitallium 2000 plus casting clasps, the removable partial denture can keep the longer initial treatment effect.

Key words: Attenuation, Clasp, pH, Fatigue

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