J Korean Orthop Assoc.  2007 Oct;42(5):586-592. 10.4055/jkoa.2007.42.5.586.

Varus Positined Femoral Stem in Cementless Total Hip Arthroplasty

• Kim SK
• Park JW
• Wang JH
• Han JW
• Song JY

• KMID: 2186464
• DOI: http://doi.org/10.4055/jkoa.2007.42.5.586

Abstract

PURPOSE: This study examined the effect of a varus positioned femoral stem after cementless proximal fitting total hip arthroplasty.
MATERIALS AND METHODS
A total of 144 hips in 136 patients who underwent cementless total hip arthroplasty, were followed-up. Twenty-one varus positioned hips were compared with 123 neutral positioned hips. The clinical results were analyzed according to the level of thigh pain and the Harris Hip score. The radiological outcome was assessed according to osteolysis, loosening and stem failure.
RESULTS
In the varus positioned hips, thigh pain was present in 1 hip, and the average Harris Hip Score was 96 points. None of the implants showed radiological evidence of loosening or impending failure. Localized osteolysis was identified in 1 hip, non-progressive radiolucencies in 2 hips, and cortical hypertrophy in 1 hip. In the neutral positioned hips, thigh pain was present in 6 hips, and the average Harris Hip Score was 97 points. Localized osteolysis was identified in 8 hips, non-progressive radiolucencies in 7 hips, cortical hypertrophy in 9 hips.
CONCLUSION
Patients with varus alignment of the stem did not present poorer clinical outcomes than those with neutral alignment of the stem.

Keyword

Total hip arthroplasty; Cementless; Proximal fitting femoral stem; Varus position

MeSH Terms

Arthroplasty, Replacement, Hip*
Hip
Humans
Hypertrophy
Osteolysis
Thigh

Figure

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  Fig. 1 The angle between the lines parallel to the femoral shaft and to the long axis of the implant was measured.

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  Fig. 2 Radiographs of a patient after a 2 year follow up of the right side with a neutral positioned stem and the left side with varus positioned stem. Both implants of sides were clinically and radiologically stable.

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