Posteriorly offset femoral component to restore anteroposterior position of the distal femur in revision total knee arthroplasty.
This study is based on a radiographic analysis of 50 cadaveric femurs (26 males, 24 females). The position of a press-fit stemmed revision total knee arthroplasty femoral component was simulated with templates. A diaphyseal engaging stem was templated in 74% of the subjects (23 males, 14 females). Every diaphyseal engaging stem required the use of a posterior offset coupler to achieve engagement in the femoral isthmus. In 26% of femurs (3 males, 10 females), anterior bowing of the distal metaphysis prevented the use of a diaphyseal engaging stem. Our results suggest that males have less flexion of the distal femur than females and can be templated effectively with a diaphyseal engaging posteriorly offset stem, whereas a metaphyseal flexed stemmed component templates better in females.
Brilhault
Jean M
JM
Department of Orthopedic Surgery, CHRU de Tours, Université François-Rabelais de Tours, Tours, France.
Ries
Michael D
MD
D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D002102:Cadaver; D005260:Female; D005269:Femur / Q000033:anatomy & histology; D006801:Humans; D008297:Male; D012086:Reoperation