Clinical and radiographical results of 179 thrust plate hip prostheses: 5–14 years follow-up study



The thrust plate hip prosthesis (TPP) is a bone-reserving prosthesis for cementless fixation at the metaphysis of the proximal femur. We retrospectively evaluated the results of 162 patients (179 hips) who underwent hip arthroplasty using TPP.

Patients and methods

Eighty-three patients (87 hips) suffered from osteoarthritis of the hip joint (OA group), 79 patients (92 hips) from osteonecrosis of the femoral head (ON group). The mean age at surgery was 55 years in the OA group and 47.4 years in the ON group. The mean follow-up period was 97 months in the OA group and 104 months in the ON group. For these patients, we evaluated the results clinically and radiographically.


The mean Merle d’Aubigne’s score improved from 8.2 to 16.9 in the OA group and from 9.1 to 16.6 in the ON group at the final follow-up. Early mechanical loosening of TPP was observed in two hips of OA and one hip of ON. In one patient of ON, bilateral TPPs had to be removed 5 years postoperatively because of infection. Two female patients with ON suffered from a spontaneous femoral fracture below the tip of the lateral plate. Kaplan–Meier survivorship using TPP removed for any reason as the end point was 97.7% in the OA group and 90.3% in the ON group after 13 years.


The middle-term results of the TPP were satisfactory if the indication for the TPP and the operative procedure were appropriate. The TPP is a useful and safe prosthesis for relatively young patients with not only osteoarthritis of the hip but also osteonecrosis of the femoral head.

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Conflict of interest

No financial or any otherwise support has been received in any regard from any organization or institution for this study

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Correspondence to Yuji Yasunaga.

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Yasunaga, Y., Yamasaki, T., Matsuo, T. et al. Clinical and radiographical results of 179 thrust plate hip prostheses: 5–14 years follow-up study. Arch Orthop Trauma Surg 132, 547–554 (2012).

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  • A bone preserving prosthesis
  • Thrust plate prosthesis
  • THA