Total condylar knee arthroplasty. Implications of postoperative stability, evaluated by stress radiography

Knee sability and knee score were studied in 44 consecutive total knee replacements with the Insall/Burnstein Total Condylar Knee prosthesis. Knee stability was assessed by stress radiography. Statistical correlation was found between increasing antero-posterior laxity and increasing score on the New York Hospital for Special Surgery scoring scale, and between increasing antero-posterior laxity and increasing knee flexion ability. Tightness (total antero-posterior laxity <5mm) was associated with complaints of pain and compromised joint function.