P424 Loss of Lordosis at C5-7 Following Two-Level Anterior Cervical Discectomy and Fusion is Associated with Subsequent Reoperations

P438 Trends in Cervical Laminoplasty Procedures Among American Board of Orthopaedic Surgery Part II Oral Examination Candidates: A 20-Year Analysis

P458 Microstructural Evidence Supporting the Use of the Quadriceps Tendon in Adolescent ACL Reconstruction: A Comparison with the Semitendinosus Tendon

PP21 Relationship Between Ultrasonographic Findings and Subscales of the Knee Injury and Osteoarthritis Outcome Score in Patients with Early Knee Osteoarthritis: A Multicenter Study