Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (53): 7909-7916.doi: 10.3969/j.issn.2095-4344.2016.53.001

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Detection and analysis of serum metal ions concentration level after metal-to-metal hip arthroplasty

Cui Peng1, Jiang Wen-xue2, Fan Meng2, Wan Yan-lin2   

  1. 1Department of Orthopedics, Tianjin Hospital, Tianjin 300211, China; 2Department of Orthopedics, Tianjin First Center Hospital, Tianjin 300192, China
  • Revised:2016-10-17 Online:2016-12-23 Published:2016-12-23
  • Contact: Jiang Wen-xue, Ph.D., Professor, Master’s supervisor, Department of Orthopedics, Tianjin First Center Hospital, Tianjin 300192, China
  • About author:Cui Peng, Master, Resident physician, Department of Orthopedics, Tianjin Hospital, Tianjin 300211, China

Abstract:

BACKGROUND: Metal-metal hip prosthesis is suitable for young patients with a large amount of activity, but the friction between the interface will lead to metal debris, and release metal ions into blood. Accurate determination and analysis will help to direct clinical operation. 

OBJECTIVE: To determine serum cobalt (Co), chromium (Cr), and molybdenum (Mo) ion levels at various time points in patients resurfacing arthroplasty of the hip (RSAH) and metal-metal total hip arthroplasty (M-M THR) by inductively coupled plasma mass spectrometry (ICP-MS), and analyze the influential factors.
METHODS: We included 32 patients undergoing RSAH (40 hips) and 12 patients undergoing M-M THR (14 hips). Average metal ion value of six normal people was considered as normal reference value. Prosthesis position was measured by using X-ray and CT after replacement. ICP-MS could accurately determine serum metal ion levels in patients after hip arthroplasty. 
RESULTS AND CONCLUSION: The concentrations of serum Co ion reached the peak at 1 year after operation, which was 7.7-fold relative to normal people. Cr ion reached its peak at 9 months after operation, which was 7.5-fold relative to normal people. Mo ion concentration kept the increased trend, reached 7.8-fold 5 years after replacement relative to normal people (P < 0.05). Five years after total hip arthroplasty, Co and Cr ions concentrations were 10.6-fold and 9.8-fold relative to normal people, respectively. ICP-MS could precisely measure serum metal ion levels after hip arthroplasty. Serum Co ions reached a peak at 1 year, and Cr ions reached a peak at 9 months, and stabilized after 5 years. Above ion levels were slightly higher than that of RSAH. These findings concluded that metal ion concentrations rose obviously compared to the normal level after metal-metal hip prosthesis, and had an obvious trend of increasing and stability. The concentrations had close relationship with the acetabulum prosthesis position, and affected by the joint function after surgery.

 

Key words: Tissue Engineering, Hip Joint, Acetabulum

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