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Related Experiment Videos

Total hip arthroplasty using the miniature Anatomic Medullary Locking stem.

Kwang-Jun Oh1, Susana Imrie, Kathy Hwang

  • 1Department of Orthopedic Surgery, Konkuk University Medical Center, Seoul, Korea.

Clinical Orthopaedics and Related Research
|June 22, 2006
PubMed
Summary

The miniature Anatomic Medullary Locking femoral stem showed good results for hip replacements in small patients. However, challenges remain with polyethylene liner wear and osteolysis.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Engineering

Background:

  • Hip dysplasia and juvenile chronic arthritis often affect patients with small anatomical proportions.
  • Total hip arthroplasty is a common treatment for hip joint degeneration.

Purpose of the Study:

  • To evaluate the outcomes of the miniature porous-coated Anatomic Medullary Locking stem in patients with small hip anatomy.
  • To assess the long-term efficacy and potential complications of this specific hip implant.

Main Methods:

  • Prospective study of 52 primary total hip arthroplasties using the Anatomic Medullary Locking stem.
  • Patients had small anatomic proportions due to hip dysplasia or juvenile chronic arthritis.
  • Follow-up averaged 7.1 years, with functional scores and revision rates analyzed.

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Main Results:

  • Harris hip scores improved significantly from 31.2 to 82.8.
  • Revision rates were 25% for cemented stems and 5% for cementless stems.
  • Wear and osteolysis were noted with small cementless polyethylene liners.

Conclusions:

  • The miniature Anatomic Medullary Locking cementless femoral stem offers satisfactory outcomes in patients with small anatomical proportions.
  • Further research is needed to address wear and osteolysis associated with small cementless polyethylene liners.