Knee Sports MCQs

During knee flexion, which bundle of the Anterior Cruciate Ligament (ACL) is the primary restraint to anterior tibial translation?

During a physical examination of the knee, the pivot shift test is performed to assess anterior cruciate ligament (ACL) integrity. The test primarily evaluates the function of which ACL bundle, and in what position does the tibia typically subluxate?

During anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone autograft, which of the following is the most common cause of early graft failure (within the first 6 months)?

A 22-year-old female soccer player sustains a non-contact pivoting injury to her right knee. Radiographs reveal a small elliptical avulsion fracture of the lateral tibial plateau just distal to the articular surface. This radiographic finding is pathognomonic for an injury to which of the following structures?

Which of the following structures is considered the primary static stabilizer to external tibial rotation at 30 degrees of knee flexion?

During an anterior cruciate ligament (ACL) reconstruction, the surgeon elects to drill the femoral tunnel independently through an anteromedial (AM) portal rather than using a transtibial technique. Which of the following is the primary biomechanical advantage of the AM portal technique?

A 45-year-old active male presents with medial compartment knee osteoarthritis and varus malalignment. He is being considered for a high tibial osteotomy (HTO). Which of the following preoperative clinical findings is generally considered an absolute contraindication for performing an HTO?

During the physical examination of a 22-year-old athlete, the Dial test demonstrates 15 degrees of increased external rotation at 30 degrees of knee flexion compared to the contralateral side, but symmetric external rotation at 90 degrees. Which structure is most likely injured?

A 25-year-old soccer player sustains a twisting knee injury. On examination, the dial test shows 15 degrees of increased external rotation at 30 degrees of knee flexion compared to the contralateral side, but symmetric rotation at 90 degrees of flexion. Which structure is most likely injured?

A 40-year-old male sustains a posterior medial meniscus root tear. Biomechanically, this injury is most equivalent to which of the following?

During reconstruction of the anterior cruciate ligament (ACL), the surgeon must be aware of the native ligament's vascular supply to optimize graft incorporation. The primary blood supply to the native ACL arises from which vessel?

A 25-year-old skier presents with acute knee swelling after a twisting fall. Plain radiographs reveal an avulsion fracture of the lateral tibial plateau (Segond fracture). This radiographic finding is pathognomonic for an injury to which of the following structures?

In a posterior-stabilized total knee arthroplasty, the posterior cruciate ligament is sacrificed. What design feature is primarily responsible for substituting the function of the PCL to achieve physiologic femoral rollback during deep flexion?

Biomechanical studies have demonstrated that a complete posterior root avulsion of the medial meniscus disrupts the circumferential hoop stresses of the knee. This specific injury leads to medial compartment contact pressures most equivalent to which of the following states?

A 28-year-old competitive athlete sustains a high-energy knee injury resulting in a knee dislocation with rupture of the ACL, PCL, and posterolateral corner (PLC). Neurovascular examination reveals intact distal pulses and sensation. After emergent reduction, the knee remains grossly unstable. What is the most appropriate surgical management strategy and timing for this patient?

A 22-year-old male sustains a twisting knee injury. Examination reveals a positive Lachman test and joint-line tenderness. MRI confirms an anterior cruciate ligament (ACL) rupture and a peripheral longitudinal tear in the "red-red" zone of the posterior horn of the medial meniscus. What is the most appropriate surgical management?

When comparing structural properties of various grafts used for anterior cruciate ligament (ACL) reconstruction, which of the following grafts exhibits the highest initial ultimate tensile load prior to physiological incorporation?