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The Journal of Arthroplasty, ISSN: 0883-5403, Vol: 21, Issue: 6, Page: 47-52
Hip
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Serum Metal Levels and Bearing Surfaces in Total Hip Arthroplasty
Rasquinha, Vijay J; Ranawat, Chitranjan S; Weiskopf, Joanne; Rodriguez, Jose A; Skipor, Anastasia K; Jacobs, Joshua JHip
This study evaluates steady-state serum metal levels in patients with 4 different combinations of fixation modalities, materials, and bearing couples. Forty patients with a minimum of 5 years of follow-up and with well-functioning primary total hip arthroplasty were recruited to have serum metal levels measured. Serum chromium and cobalt levels in the metal-on-metal cohort were significantly higher (P < .05) than the other 3 cohorts. The noncemented ceramic-polyethylene cohort had significantly lower (P < .05) serum chromium levels compared to cemented and noncemented metal-polyethylene cohorts and significantly higher serum titanium levels compared to the cemented metal-polyethylene cohort which had no titanium-containing implants. Debris generated at the metal head/neck modular junction likely accounts for the significantly lower serum chromium concentration in ceramic-polyethylene bearing couples.
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