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Review Question - QID 220387

QID 220387 (Type "220387" in App Search)
An 82-year-old female with rheumatoid arthritis presents to your office with severe right knee osteoarthritis. After failing all conservative treatment options, you schedule her for a manual right total knee arthroplasty. The plan is to cement a posterior-stabilized total knee implant. After bone preparation is performed and the patella is resurfaced, you start to insert the trial components. All of a sudden you hear a crack and the knee no longer feels balanced. Which structure is most commonly fractured intraoperatively during a primary total knee arthroplasty?