First experiences with the Fitmore® hip stem: Early results of the 16-month monitoring

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Abstract
Introduction. Fitmore hip stem belongs to the group of short stem prostheses with the metaphysar stabilization, with its shape and form it protects the bone mass in the greater trochanter region and distal part of the femur. The aim of this paper is to present the early postoperative results in patients with implanted Fitmore hip stem and point out some of the advantages. Material and methods. A series of 10 patients is presented with implanted Fitmore hip stem. The average age of the patients is 54,5 (48-65) years. There are 5 women and 5 men. The total monitoring time is 16 months. To rate the condition of the hip joint we have used WOMAC score. We have also monitored the degree of hip pain, hip flexion, heterotopic ossification and indentation in the stem of the prosthesis. Results. After 12 months of monitoring 9 (90%) patients had no pain in the thigh region, and only 1 (10%) experienced mild pain. The hip flexion rose from the average 89 degrees to postoperative 114 degrees. WOMAC score rose as well, from 49 to 94 average points. Indentation in the stem was registered 3 months after the operation in 2 (20%) patients - in one of the patients the indentation was 3 mm and in the other patient it was 5 mm. After the 16-month monitoring, the results are excellent. The monitoring period is short though, it should be continued and the results should be presented after 5 and then after 10 years. Conclusion. Early results of the implantation Fitmore stem show good bone ingrowth with excellent functional result.