[Chronic instability of the knee]

Area of Science:

• Orthopedics and Sports Medicine
• Biomechanics
• Regenerative Medicine

Context:

• Chronic knee instability significantly impacts athletes, often stemming from anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) injuries.
• Ruptures of these central stabilizing ligaments can lead to knee slipping, pain, and recurrent joint swelling (hydrarthrosis).
• While ligamentous injury is critical, compensatory mechanisms involving other knee stabilizers or musculature can influence functional outcomes.

Purpose:

• To review recent advancements in understanding and treating chronic knee joint instability.
• To outline the diagnostic process, including clinical, radiological, and arthroscopic evaluations, for patients with knee instability.
• To discuss the range of treatment options available, from conservative rehabilitation to surgical reconstruction.

Summary:

• Knee joint stability relies heavily on the ACL and PCL; their rupture is a common cause of significant morbidity, especially in athletic populations.
• A comprehensive evaluation considering laxity severity, meniscal/cartilaginous damage, functional deficits, and patient lifestyle is essential for tailoring treatment.
• Treatment strategies are individualized, ranging from physical therapy to ligament reconstruction using autografts or synthetic materials, emphasizing a non-stereotyped approach.

Impact:

• Improved diagnostic and therapeutic strategies for chronic knee instability can lead to better patient outcomes and faster return to sport.
• Personalized treatment plans optimize functional recovery and minimize long-term complications associated with knee joint laxity.
• Advances in surgical techniques and materials for ligament reconstruction offer more effective solutions for knee instability.