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Knee

Pediatric ACL Reconstruction

ACL Reconstruction: Graft Selection

ACL reconstruction involves the replacement of the ruptured (torn) ligament with a tendon graft. Graft tissue is either taken from the patient (autograft) or from a tissue donor (allograft).

The source of the graft tissue and the technique depend on the severity of the injury, age and activity level of the patient, desired outcome, and Dr. Chahla’s preferred method. In pediatric cases, studies have found autografts to be superior to allografts in overall surgical outcome and return to sport. Therefore, for pediatric ACL reconstructions, Dr. Chahla recommends use of an autograft. Each type of autograft has its advantages and disadvantages, and it is important that you discuss any questions you may have with Dr. Chahla during your appointment as you choose from the graft options below.

Bone-patellar tendon-bone (BTB) autograft ACL reconstruction has the longest proven track record of successful outcomes and is the technique to which all others are compared. In general, autografts have better long-term outcomes and a lower risk of complications compared to other graft types. The BTB Autograft, in particular, is the gold standard graft choice for ACL reconstructions of young, active patients because of its strong bone-to-bone fixation properties. The BTB autograft is harvested from the central third of the patient’s patellar tendon, along with bone plugs from the patella (kneecap) and tibia.

More recently, the quadriceps tendon autograft has gained popularity as a graft source for ACL reconstruction; however, further data is necessary for a more widespread use. This graft is harvested from the patient’s quadriceps tendon, with or without bone plugs from the patella. This is typically the graft of choice when performing an ACL reconstruction on a pediatric patient whose growth plates remain open (ACL Reconstruction using Physeal-Sparing Technique). Open physes are an x-ray finding that Dr. Chahla will bring to your attention during your consultation should your images reveal this.

In this technique, the semitendinosus and gracilis hamstring tendons are harvested from the patient’s own hamstring muscle. The hamstring tendon autograft is considered less invasive than the patellar tendon autograft. However, the re-tear rate associated with hamstring tendon autografts is higher compared to other graft choices. Additionally, the hamstring tendons act as a secondary stabilizer to the knee joint. For this reason, Dr. Chahla does not typically recommend the hamstring tendon autograft to patients undergoing ACL reconstruction.

ACL Reconstruction Pediatric Technique:

During your child’s consultation with Dr. Chahla, x-rays will be obtained. X-rays are a critical part of the pre-operative evaluation, as the images allow Dr. Chahla to evaluate your child’s growth plates (physes). The growth plates are areas of developing cartilage at the ends of long bones, and they are crucial for the proper growth and development of bones in children and adolescents. Children and adolescents have open growth plates at the ends of their bones. As children and adolescents grow, the growth plates close. At this stage a hand xray can allow us to determine how much growth is remaining.

In traditional ACL reconstruction, the tunnels created for the new ACL graft include the physes of the bone. This is not a problem for patients with closed physes. However, for growing children and adolescents with open physes on x-ray, Dr. Chahla will recommend a physeal-sparing ACL reconstruction technique to preserve the growth plates and avoid unnecessary complications such as growth disturbances and limb length discrepancies.

Physeal-sparing ACL reconstruction is a surgical technique specifically designed for pediatric patients, taking into consideration the presence of open physes in their bones. Physeal-sparing techniques are used to minimize the impact on the growth plates. Using this technique, Dr. Chahla can successfully reconstruct the ACL while preserving the integrity of the growth plates and avoiding interference with the natural growth and development of the bones. This is achieved through careful surgical planning and tunnel positioning designed around the unique anatomy of growing bones.

The primary goal of this technique is to provide a safe and effective solution for ACL injuries in pediatric patients without compromising their future growth. By performing physeal-sparing ACL reconstruction, Dr. Chahla is prioritizing the long-term health and functionality of the joint and minimizing the risk of complications related to growth plate damage, while still allowing your child to return to their normal activities after recovery from surgery. If growth plates are almost closed and height is similar to that of their parents, an adult technique can be performed.

At a Glance

Dr. Jorge Chahla

  • Triple fellowship-trained sports medicine surgeon
  • Performs over 700 surgeries per year
  • Assistant professor of orthopedic surgery at Rush University
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