TKA Complications
A 68-year-old woman presents 18 months after primary total knee arthroplasty with recurrent giving way and difficulty descending stairs. She reports the knee feels unstable, especially with deep flexion. Examination reveals no effusion, well-healed incision, and 0-120° range of motion. There is mild valgus laxity with the knee in extension, but significant anteroposterior translation at 90° flexion. X-rays show well-fixed components with no evidence of loosening. Regarding instability after TKA:
Mark each as TRUE or FALSE
Instability is one of the most common reasons for revision TKA; it can be classified as flexion inst...
Flexion instability presents with difficulty descending stairs, giving way during flexion activities...
Extension instability is more common than flexion instability; it is caused by undersizing the tibia...
Extension instability causes mid-flexion or full extension giving way and hyperextension; causes inc...
Treatment depends on identifying the type and cause of instability; options include thicker polyethy...
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Click T (True) or F (False) for each option