IRCT20250607066100N1 IRCT 2025-07-04 Shahid Beheshti University of Medical Sciences Comparison of Two Surgery Techniques of Osteotomy with and Without Tendon Reinsertion in the treatment of tendinopathy. Comparison of Treatment Outcomes in Patients with Insertional Achilles Tendinopathy (IAT) Using Two Osteotomy Techniques With and Without Tendon Reinsertion 2025-06-10 anticipated 42 Complete https://irct.ir/trial/84162 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, randomization is performed using block randomization with variable block sizes (2, 4, and 6 participants). The unit of randomization is individual, meaning each patient is independently assigned to one of the two treatment groups. Stratified randomization is not used in this trial. The random allocation sequence was generated using the online software Sealed Envelope. After determining the total sample size (42 participants) and specifying the possible block sizes, the allocation sequence was created and placed in sealed, opaque envelopes. On the day of surgery, these envelopes are handed to the surgeon without prior disclosure to ensure allocation concealment. 3 Insertional Achilles Tendinopathy. Intervention 1: Intervention group: After the osteotomy, the Achilles tendon is completely separated and, after tendinous debridement, the tendon is re-sutured to its anatomical location (reinsertion) by passing a thread through the tunnel created in the calcaneus bone. Intervention 2: Intervention group: After the osteotomy and removal of excess tissue, the Achilles tendon is not re-sutured to the calcaneus bone and reinsertion is not performed. No - There is not a plan to make this available Justification or reason for not sharing IPD is Maintaining patient privacy and confidentiality