Prospective randomised clinical trial assessing subsidence and rotation, using radiostereometric analysis, of two modular cementless femoral stems (Global K2 and Apex).

J Orthop

Perth Bone and Tissue Bank, Verdun Street, Nedlands, Western Australia 6009, Australia ; Hollywood Private Hospital, Verdun Street, Nedlands, Western Australia 6009, Australia ; University of Western Australia, Nedlands, Western Australia 6009, Australia.

Published: June 2014

AI Article Synopsis

  • The study aimed to evaluate subsidence, rotation, and clinical scores of two types of cementless femoral stems (K2 and Apex) in hip surgeries.
  • A total of 260 patients were involved, monitored over 2 years using RSA (Roentgen Stereophotogrammetric Analysis) and clinical scoring systems.
  • Results showed high Oxford Hip scores for both stems, minimal subsidence and rotation, no significant clinical differences between the stems, and a low revision rate of 0.8%, indicating promising long-term outcomes.

Article Abstract

Aims: To accurately assess subsidence, rotation and clinical scores in two cementless femoral stems.

Methods: 260 patients received either K2 or Apex femoral stems and were studied over 2y, with RSA and clinical scores.

Results: Mean Oxford Hip score for both stems was excellent (45.78 and 46.76). Very little subsidence or rotation were noted on RSA in either stem. There were no statistically significant differences in clinical scores, or radiological motion between stems. Revision rate was 0.8% over the study period.

Conclusion: Excellent clinical and RSA scores over the 2y study period predict good long term outcomes for these stems.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4118571PMC
http://dx.doi.org/10.1016/j.jor.2014.02.001DOI Listing

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