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[Matched pair analysis: Innex FIXUC vs. NexGen LPS].

C Hauk1, T J Heyse, M C P Witteborn

  • 1Klinik für Orthopädie und Rheumatologie, Universitätsklinikum Giessen und Marburg GmbH, Standort Marburg.

Zeitschrift Fur Orthopadie Und Unfallchirurgie
|April 10, 2009
PubMed
Summary

The NexGen prosthesis (femur first) showed better clinical outcomes in total knee arthroplasty (TKA) compared to the Innex prosthesis (tibia first). Both prostheses achieved satisfactory results with similar revision rates.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Clinical Outcomes Research

Background:

  • Total knee arthroplasty (TKA) is a common procedure for knee osteoarthritis.
  • Surgical technique, including the order of component implantation and prosthesis type, can influence clinical outcomes.
  • Ligament balancing and rotational alignment are critical steps in TKA.

Purpose of the Study:

  • To compare the clinical results of TKA using two different surgical strategies: tibia-first versus femur-first approaches.
  • To evaluate the impact of prosthesis type (Innex FIXUC vs. NexGen LPS) on patient outcomes.
  • To assess ligament balancing and rotational alignment in TKA.

Main Methods:

  • Retrospective matched-pair study of 30 patients receiving Innex FIXUC and 30 matched patients receiving NexGen LPS.
  • Patients were matched based on age, gender, height, weight, and BMI.
  • Clinical outcomes were assessed using UCLA score, Knee Society score, Lequesne score, VAS for pain, and Feller patellar score.

Main Results:

  • NexGen LPS demonstrated statistically significant advantages in UCLA activity score, Knee Society knee score, total Knee Society score, VAS pain score, and Lequesne knee score.
  • No significant differences were observed in the Knee Society function score or Feller patellar score.
  • Mean follow-up was 25 months for Innex and 3 years for NexGen.

Conclusions:

  • The femur-first approach with the NexGen prosthesis showed superior functional outcomes in TKA compared to the tibia-first approach with the Innex prosthesis.
  • Satisfactory clinical results can be achieved with the Innex FIXUC prosthesis.
  • Both surgical strategies demonstrated comparable revision rates.