中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (30): 4784-4789.doi: 10.3969/j.issn.2095-4344.2015.30.006

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

钛种植体基台和不同合金的体外耐腐蚀性能

黄伟城,吴泽键,陈伟生   

  1. 南方医科大学附属普宁人民医院(普宁市人民医院)口腔科,广东省普宁市  515300
  • 出版日期:2015-07-16 发布日期:2015-07-16
  • 作者简介:黄伟城,男,1981年生,广东省普宁市人,汉族,硕士,主治医师,主要从事口腔疾病及口腔材料的研究。

In vitro corrosion resistance of titanium abutment and different alloys

Huang Wei-cheng, Wu Ze-jian, Chen Wei-sheng   

  1. Department of the Stomatology, the People’s Hospital of Puning, Southern Medical University, Puning 515300, Guangdong Province, China
  • Online:2015-07-16 Published:2015-07-16
  • About author:Huang Wei-cheng, Master, Attending physician, Department of the Stomatology, the People’s Hospital of Puning, Southern Medical University, Puning 515300, Guangdong Province, China

摘要:

背景:各种医用生物材料在应用于口腔环境之前,除了对其机械性能和理、化学性能予以严格的考察之外,还需要进行口腔环境耐腐蚀性实验,以保证材料的生物相容性。

目的:分析钛种植体基台和不同钛合金的体外耐腐蚀性能。

方法:构建体外人工唾液腐蚀环境,pH=6.0,温度(37±0.5) ℃,利用动电位极化技术、扫描电镜、X射线衍射等方式评估钛合金、金合金、镍铬合金及钛种植体基台在人工唾液中浸泡24 h的耐腐蚀性能。

结果与结论:不同合金的稳态电位不同,其中金合金钝化区范围最大,其次为钛种植体基台和钛合金,镍铬合金钝化区范围最小。经过24 h的人工唾液浸泡后,不同材料的表面均开始出现钝化膜,扫描电镜显示,镍铬合金表面可见明显的腐蚀痕迹,出现大量直径较大的深点蚀坑,其余3种合金均未出现明显腐蚀现象;镍铬合金表面铬、钼、铝含量均出现减少现象,镍、氧含量增加,其余合金表面未出现明显改变;镍铬合金表面生成 Cr2O3,钛种植体基台及钛合金表面均生成TiO2,金合金表面仍为Au、Pt单相存在,未生成化合物。表明钛合金与钛种植体基台具有相似的耐腐蚀性能,且差于金合金,但优于镍铬合金。

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 生物材料, 口腔生物材料, 钛种植体基台, 钛合金, 金合金, 镍铬合金, 耐腐蚀性能

Abstract:

BACKGROUND: Except for mechanical properties and physical and chemical properties, corrosion resistance testing is necessary for a variety of biomedical materials applied in the oral environment to ensure the biocompatibility of materials.
OBJECTIVE: To explore the corrosion resistance of titanium abutment and different titanium alloys in vitro.
METHODS: Corrosion environment by in vitro artificial saliva was constructed with pH=6.0 at (37±0.5) ℃. Potentiodynamic polarization technique, scanning electron microscope and X-ray diffraction methods were employed to assess the corrosion resistance of titanium alloy, gold alloy, nickel-chromium alloy, and titanium abutment immersed in the artificial saliva for 24 hours.
RESULTS AND CONCLUSION: Different alloys had different steady-state potentials, and the range of passivation region was the largest for gold alloy, followed by titanium abutments and titanium alloys, and the smallest for nickel-chromium alloy. After 24 hours of immersion in the artificial saliva, passivation films appeared on the surface of different materials. under the scanning electron microscope, the nickel-chromium alloy surface showed obvious traces of corrosion and there were a large number of large-diameter deep pits, but no corrosion occurred on the surface of the remaining three kinds of alloys; on the surface of nickel-chromium alloy, the contents of chromium, molybdenum and aluminum were decreased, and the contents of nickel and oxygen were increased, but there were still no changes on the surface of the remaining alloys. Cr2O3 was found on the surface of nickel-chromium alloy, TiO2 was generated on the surface of titanium abutment and titanium alloy, but Au and Pt still existed in a single phase on the surface of gold alloy. These findings indicate that titanium alloy and titanium abutment have similar corrosion resistance that is inferior to the gold alloy, but better than the nickel-chromium alloy.

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

Key words: Dental Implants, Gold Alloys, Chromium Alloys

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