Total knee arthroplasty in patients with skeletal dysplasia.
BACKGROUND
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.


METHODS
138 knee arthroplasties in patients with a height ≤150 cm 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.


RESULTS
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.


CONCLUSIONS
Knee arthroplasty can be performed in patients suffering from dwarfism with good clinical benefits. However, survival rates are worse compared to the general population.
Orthopaedic Department, HELIOS Endo-Klinik Hamburg, Holstenstr. 2, 22767, Hamburg, Germany, guenther.daniel@mh-hannover.de.
Daniel
D
Guenther
Daniel
D
Kendoff
Mohamed
M
Omar
Liang Richard
LR
Cui
Stefan
S
Schmidl
Oliver
O
Jakobs
Thorsten
T
Gehrke
Carl
C
Haasper
D000368:Aged; D001168:Arthritis / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee; D004185:Disability Evaluation; D004392:Dwarfism / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D012086:Reoperation