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Related Experiment Videos

Stem modularity: rarely necessary in primary total hip arthroplasty.

Adolph V Lombardi1, Thomas H Mallory, Robert A Fada

  • 1Joint Implant Surgeons, Inc, Columbus, Ohio 43215, USA.

Orthopedics
|December 28, 2002
PubMed
Summary

This study compared cementless total hip arthroplasty (THA) femoral components. Non-modular and modular stems showed similar clinical outcomes, but porous coating is crucial for preventing debris.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Engineering

Background:

  • Cementless primary total hip arthroplasty (THA) aims for long-term implant stability.
  • The role of femoral stem modularity in cementless THA requires further investigation.

Purpose of the Study:

  • To compare the clinical and radiographic outcomes of cementless primary THA using non-modular versus modular femoral components.
  • To evaluate the necessity of femoral stem modularity in cementless primary THA.

Main Methods:

  • Retrospective review of two consecutive series of cementless primary THA.
  • Comparison of non-modular Mallory-Head Porous components with modular Sivash Range of Motion components.
  • Clinical assessment and radiographic analysis including Engh fixation scores.

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Main Results:

  • Both non-modular and modular femoral components demonstrated comparable clinical and radiographic results.
  • Excellent femoral fixation was achieved in both groups, evidenced by high Engh fixation scores.
  • Circumferential proximal porous-coating was identified as critical for preventing particulate debris propagation.

Conclusions:

  • Femoral stem modularity is not essential for satisfactory outcomes in cementless primary THA.
  • The importance of circumferential porous coating for implant longevity and preventing wear debris is highlighted.
  • Modular systems were associated with increased surgical complexity, longer operative times, and greater blood loss.