Abstract:The treatment of an anterior cruciate ligament (ACL) avulsion fracture is controversial, especially in skeletally immature patients, because of concerns about physeal damage. To reduce the risk of physeal injury, an arthroscopic technique was performed. A bioabsorbable suture anchor was inserted through anteromedial portals and fixed to a bioabsorbable suture anchor at the center of the fracture bed; it was then passed through the threads at the ACL avulsion fragment and tied with the ACL substance. After this, the avulsion fragment was repaired by an all-inside technique between the distal portion of the ACL and the transverse ligament and periosteum by a suture hook. The arthroscopic hybrid technique using a suture anchor with an all-inside repair is more rigid and safe. In addition, this physeal-sparing fixation is possible in immature patients.A nterior cruciate ligament (ACL) substance injuries are uncommon in the skeletally immature population because the strength of the ligament is greater than that of the bone and growth plate. [1][2][3] This results in more avulsion fractures in this age group than ACL ligament injuries (Fig 1A). Although several fixation methods, such as the percutaneous K-wire fixation, screw fixation, and retrograde pullout sutures, are available, no single treatment can be applied to all fracture types.1-6 The anterior impingement on terminal knee extension and, later, the operation for implant removal were the main drawbacks of the use of a metal screw and staple. Suture anchors and screw fixations have some limitations especially in small fragments or skeletally immature patients. 4 We introduce a new and effective hybrid fixation of a bioabsorbable suture anchor and an all-inside repair technique in tibial eminence fractures in skeletally immature patients, which we believe provides a more anatomic and rigid fixation (Video 1).
Surgical TechniqueKnee arthroscopy was performed with an anterolateral and anteromedial (AM) portal, along with a midpatellar (MP) portal that was used for the arthroscope. After hematoma lavage, arthroscopic examination of all knee compartments was performed. The anterior and transverse horns of the menisci were probed and retracted, if they were interposed, for anatomic fracture reduction. Any clot or fibrous tissue was debrided from the fracture site. A suture hook (ConMed, Largo, FL) loaded with a shuttle relay was introduced through the AM portal; it then pierced the medial side of the ACL fibers, and the fragment was avulsed. The shuttle relay was advanced out through the hook, and the end was brought out to the MP portal (Fig 2A). The suture hook loaded with a shuttle relay was introduced again through the AM portal; by use of the same method, the suture hook pierced the lateral side of the ACL avulsion fragment, and then the end was brought out to the MP portal (Fig 2B). A 3-mm bioabsorbable suture anchor loaded with 2 strands of No. 2 FiberWire (Arthrex, Naples, FL) was placed at the center of the fracture bed from the AM portal with a 45...