Seven years of chronological changes of serum chromium levels after Metasul metal-on-metal total hip arthroplasty.
Although many authors have reported the serum concentrations of metal ions in patients who had metal-on-metal coupling prostheses, most of the studies were not longitudinal, and the follow-up periods were short. We evaluated the longitudinal changes of serum chromium levels in 44 patients who had undergone unilateral metal-on-metal total hip arthroplasty for a minimum of 7 years postoperatively. Although there was a consistent increase in the mean serum chromium level until 3 years after implantation, there was little difference in the levels from years 3 to 7 postoperatively. Although the serum chromium concentration was low throughout postoperative follow-up for 7 years in about 25% of patients, the serum chromium level stayed high or showed gradual elevation in 16.3% of our patients.
Maezawa
Katsuhiko
K
Department of Orthopaedic Surgery, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan.
Nozawa
Masahiko
M
Yuasa
Takahito
T
Aritomi
Kentaro
K
Matsuda
Keiji
K
Shitoto
Katsuo
K
D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D002857:Chromium / Q000097:blood*; D002858:Chromium Alloys; D005260:Female; D005271:Femur Head Necrosis / Q000601:surgery; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008670:Metals; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery
D002858:Chromium Alloys; D008670:Metals; D002857:Chromium