Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (30): 4784-4789.doi: 10.3969/j.issn.2095-4344.2015.30.006

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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

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

CLC Number: