Total knee arthroplasty in patients with skeletal dysplasia.

Abstract

Dwarfism is a challenge in arthroplasty. The anatomical features provide a lot of pitfalls. The aim of this study was to follow-up growth-restricted patients after endoprosthetic treatment. 138 knee arthroplasties in patients with a height ≤150cm between January 1, 2000 and May 5, 2013 at our institution were enrolled in this study. 124 cases were available for 1-year follow-up. Out of these, 43 cases were available for 5-year follow-up so far. 14 patients were lost to follow-up. IKS score increased from 35±16 on admission to 67±22 (p<0.001) at 1-year follow-up and 65±23 (p<0.001) at 5-year follow-up. Function Score increased from 40±29 on admission to 64±21 (p<0.001) at 1-year follow-up and 63±23 (p<0.001) at 5-year follow-up. Revision surgery was required in one case (0.8%) after 1-year follow-up, and in an additional three cases (7%) after 5-year follow-up. Knee arthroplasty can be performed in patients suffering from dwarfism with good clinical benefits. However, survival rates are worse compared to the general population.