~ 51 ~ International Journal of Orthopaedics Sciences 2023; 9(3): 51-55 E-ISSN: 2395-1958 P-ISSN: 2706-6630 IJOS 2023; 9(3): 51-55 © 2023 IJOS https://www.orthopaper.com Received: 24-04-2023 Accepted: 29-05-2023 Mahmoud Soliman Leila Department of Orthopedic Surgery, Faculty of Medicine, Tanta University, Tanta, Egypt Abdel Hafez Abdel Hafez Megahed Department of Orthopedic Surgery, Faculty of Medicine, Tanta University, Tanta, Egypt Markus Walther Foot and Ankle Surgery, FIFA Medical Center, Schön Klinik München Harlaching, Munich- Germany Mostafa Ahmed Ayoub Department of Orthopedic Surgery, Faculty of Medicine, Tanta University, Tanta, Egypt Kamal Mohamed Hafez Department of Orthopedic Surgery, Faculty of Medicine, Tanta University, Tanta, Egypt Corresponding Author: Mahmoud Soliman Leila Department of Orthopedic Surgery, Faculty of Medicine, Tanta University, Tanta, Egypt Chronic lateral ankle instability Mahmoud Soliman Leila, Abdel Hafez Abdel Hafez Megahed, Markus Walther, Mostafa Ahmed Ayoub and Kamal Mohamed Hafez DOI: https://doi.org/10.22271/ortho.2023.v9.i3a.3406 Abstract Chronic lateral ankle instability (CAI) is defined as the occurrence of recurrent bouts of lateral ankle instability. Clinical examination should be supplemented by a complete, directed imaging assessment. Imaging occurred by simple comparative AP and lateral weight-bearing ankle X-ray, stress X-rays, ultrasound, CT arthrography and MRI. Arthroscopic classification of chronic lateral ankle instability is the stable ankle, moderate lateral ankle instability, severe lateral ankle instability and severe global ankle instability. Management of chronic lateral ankle instability focuses on a combination of peroneal muscle strengthening, balance reflex training, and external bracing as needed to prevent recurrent injury. Patients who fail these measures are candidates for lateral ankle ligament reconstruction. Keywords: Chronic lateral ankle instability, ligament reconstruction, instability, lateral ankle Introduction Various clinical problems resulting from sprains of the ankle are regularly and improperly described using terms like "chronic ankle instability," "lateral ankle instability," and "ankle ligament laxity". The 'Laxity' term refers to a physical complaint that may be objectively found during a clinical assessment. Following lateral ligament damage, instability is an indication of an unstable ankle [1] . A subjective sensation of the ankle giving way is often described by the individual who experiences this instability. A medical disease known as chronic ankle instability is marked by recurring bouts of instability that recurrently cause sprained ankles. The most frequent sports- related injuries are "ankle sprains" or injuries to the lateral ankle ligament complex [2] . Chronic instability's pathomechanics Recurrent episodes of lateral ankle instability are known as chronic ankle instability (CAI). An initial acute incident is the most frequent cause that predisposes a person to chronic instability; nevertheless, the processes of chronic instability are assumed to be distinct from the acute damage. Two traditional causes of chronic instability have been identified, however, they are not mutually exclusive [3] .  Mechanical instability: This condition may be assessed using a physical examination, stress imaging, or arthrometry [4] .  Functional instability: A functional instability component will almost always be present in individuals suffering from CAI, and it frequently represents the main issue [5] . Clinical evaluation [6] The instability's history and its duration. Symptoms include recurrent "sprains," a feeling of instability while bearing weight, permanent pain or acute accident-related pain, oedema, and intra-articular mechanical conditions including snapping or blockages. Impact on functionality: Occupational and athletic. Examination [7] Foot morphotype screening, especially for hindfoot varus, screenings for pain spots and legs pendent, peroneal tendon displacement, and ligament assessment is an important step and assessment for general laxity of the ligaments based on Beighton scores.