GJL is a risk factor for postoperative recurrent instability following an MBR for CLAI. Additional suture tape augmentation has been suggested to provide more strength and stability. However, the outcomes of the MBP with suture tape augmentation were unknown, which requires further exploration.

Generalized joint laxity (GJL) is a risk factor for postoperative recurrent instability following an open modified Broström repair (MBR) for chronic lateral ankle instability (CLAI). MBR with suture tape augmentation may provide more strength and stability. However, BPR with suture tape augmentation may lead to rejection of the suture tape. In addition, the outcomes of the MBP with suture tape augmentation were unknown.

Inclusion Criteria:

• Clinical diagnosis of lateral ankle instability
• Beighton score ≥4
• Age with 18 to 60 years

Exclusion Criteria:

• Patients with an acute or subacute ankle injury
• Injury of the deltoid ligament
• Alignment of lower extremity greater than 5 degrees
• Fractures of the lower extremity
• Stage III or IV osteoarthritis
• Patients who refused to participate in the study

The patients who go to visit a doctor for persistent lateral ankle pain and instability over three months and invalid conservative treatment, with the age of 15 - 55 years. If the Beighton score of the patient is ≥4 and the exclusion criteria are met, he or she is going to be advised to participate in this study.

The demographics data, Beighton score, primary and secondary outcomes would be available to other researchers