J Korean Hip Soc.  2007 Mar;19(1):1-8. 10.5371/jkhs.2007.19.1.1.

Primary Total Hip Arthroplasty with Cementless VerSys Femoral Stem: a Minimum 5-years follow-up

• Kim SB
• Park SW
• Cho HJ
• Jung NY

• KMID: 1811319
• DOI: http://doi.org/10.5371/jkhs.2007.19.1.1

Abstract

PURPOSE
This study evaluated the clinical and radiographic results of primary total hip arthroplasty with a noncemented VerSys Fiber Metal Midcoat stem.
MATERIALS AND METHODS
Thirty nine hips in thirty three patients were followed up for a minimum of five years. The clinical results were evaluated based on the Harris hip scores. Radiographic analysis of the femoral component was performed by evaluating the radiolucent lines, cortical hypertrophy, stress shielding, osteolysis and fixation stability. Radiographic analysis of the acetabular component was performed by evaluating the osteolysis and fixation stability.
RESULTS
The average Harris hip score improved from 54.3 points preoperatively to 95.4 points at the last followup. In the results of radiographic analysis of the femoral component, stable bony ingrowth was noted in thirty-eight cases and stable fibrous ingrowth was observed in one. Non-progressive radiolucency<2 mm in width was observed in eight cases. There were three cases of osteolysis, thirty-six cases of stress shielding, and one case of cortical hypertrophy. Radiographic analysis of the acetabular component revealed stable bony ingrowth in thirty-eight cases and unstable fixation in one case. There were two cases of osteolysis.
CONCLUSION
The results of primary total hip arthroplasty using cementless VerSys femoral stem after a minimum of five-year follow up revealed that the rate of femoral osteolysis had decreased and the rate of bone resorption by stress shielding was relatively high. However, a longer-term follow up will be needed.

Keyword

Total hip replacement arthroplasty; Femoral stem; VerSys

MeSH Terms

Acetabulum
Arthroplasty, Replacement, Hip*
Bone Resorption
Follow-Up Studies*
Hip
Humans
Hypertrophy
Osteolysis