Long-Term Effectiveness of Total Hip Replacement with the Collum Femoris Preserving Prosthesis

Abstract

The objective of this study was to follow-up long term (5-12 years) patients with total hip arthroplasty with the collum femoris preserving prosthesis to evaluate clinical outcome and potential complications. Forty-six of 152 patients who underwent this procedure between September 2000 and September 2012 were followed up. The average follow-up time was 7.6 years, and assessed were radiographs, Harris score, limb length, hip function, and complications. Six patients had perioperative complications including five cases of femoral shaft fracture and one case of dislocation 1 week after the operation. No infections of the surgical site, no deep venous thrombosis or pulmonary embolism were observed. The last recorded Harris hip score improved from a preoperative average of 41.2 (range 17-60) to an average of 82.3 (74-96), with the score >80 in 38 patients, 70-80 in six patients, and <70 in two patients. Radiolucent lines were found on radiographs in two patients with acetabular prosthesis and one patient with femoral prosthesis. The remainder of patients had satisfactory positions of acetabular and femoral stem prostheses with no loosening or subsidence, and a good condition of femoral neck. Total hip arthroplasty with the collum femoris preserving prosthesis is a good option for younger patients who need prosthesis revision. This arthroplasty achieves satisfactory long-term effectiveness.