TY - JOUR
T1 - The 6-Year Migration Characteristics of a Hydroxyapatite-Coated Femoral Stem: A Radiostereometric Analysis Study
AU - Callary, Stuart
AU - Campbell, David
AU - Mercer, Graham
AU - Nilsson, Kjell-Gunnar
AU - Field, John
PY - 2012/8
Y1 - 2012/8
N2 - A prospective cohort of 30 patients undergoing primary total hip arthroplasty for treatment of osteoarthritis was enrolled in a study to characterize the migration behavior of a clinically successful cementless stem. At 6 years, the mean subsidence of the stem was 0.63 mm (range, -0.33 to 3.68 mm); the mean rotation into retroversion was 1.41° (range, -1.33° to 7.48°). No stems had additional subsidence of more than 0.25 mm between 6 months and 6 years. The resultant mean subsidence between 2 and 6 years was 0.03 mm, which is below the limit measurable by radiostereometric analysis. The data demonstrate that subsidence of this cementless stem occurs within the first 6 months, after which there is persistent stabilization.
AB - A prospective cohort of 30 patients undergoing primary total hip arthroplasty for treatment of osteoarthritis was enrolled in a study to characterize the migration behavior of a clinically successful cementless stem. At 6 years, the mean subsidence of the stem was 0.63 mm (range, -0.33 to 3.68 mm); the mean rotation into retroversion was 1.41° (range, -1.33° to 7.48°). No stems had additional subsidence of more than 0.25 mm between 6 months and 6 years. The resultant mean subsidence between 2 and 6 years was 0.03 mm, which is below the limit measurable by radiostereometric analysis. The data demonstrate that subsidence of this cementless stem occurs within the first 6 months, after which there is persistent stabilization.
KW - Radiostereometric analysis
KW - Stabilization
KW - Subsidence
KW - Total hip arthroplasty
UR - http://www.scopus.com/inward/record.url?scp=84864018676&partnerID=8YFLogxK
U2 - 10.1016/j.arth.2011.12.002
DO - 10.1016/j.arth.2011.12.002
M3 - Article
VL - 27
SP - 1344-1348.e1
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
SN - 0883-5403
IS - 7
ER -