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Performance-based functional outcome for children 12 years or younger following anterior cruciate ligament injury: a two to nine-year follow-up study

  • Knee
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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

There is limited scientific knowledge on ACL injuries in children 12 years or younger. Substantial controversy exists on treatment algorithms and there are no published data on performance-based functional outcome. Classification of adult ACL injured subjects as copers and non-copers is common, but no study has classified knee function in children using performance-based functional test after ACL injury. The aim of the present study was to evaluate the medium-term functional outcome among children with ACL injury and to classify them as copers and non-copers. Children 12 years or younger who were referred to our institution from 1996 to 2004 with an ACL injury were included. Twenty non-operated subjects (21 knees) and six ACL reconstructed subjects (7 knees) were examined at a minimum of 2 years after ACL injury or reconstruction. Four single-legged hop tests, isokinetic muscle strength measurements, and three functional questionnaires (IKDC 2000, KOS-ADLS and Lysholm) were used as outcome measurements. Children who had resumed their pre-injury activity level and performed above 90% on all hop tests were classified as copers following non-operative treatment and ACL reconstruction. The 26 children were on average 10.1 years at the time of injury. Of the non-operated children, 65% had returned to pre-injury activity level, and 50% were classified as copers. Copers scored significantly better than non-copers on single hop for distance, IKDC 2000, and Lysholm score. Of the non-operated children, 9.5% had suffered a secondary meniscus injury. Of the ACL reconstructed subjects, 67% were classified as copers at follow-up. Non-operated ACL-deficient children demonstrated excellent knee function on performance-based single-legged hop tests and 65% had returned to pre-injury activity level. Delayed ACL reconstruction resulted in success for a majority of the ACL-reconstructed children. Treatment algorithms for ACL-injured children are discussed.

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Acknowledgments

This investigation was made possible by our funding institution, the Eastern Norway Regional Health. We also thank our research coordinator, Linn Gjersing, for her efforts in organizing the logistics for the project.

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Authors and Affiliations

  1. The Norwegian Sport Medicine Clinic and Norwegian School of Sport Sciences, NAR, Orthopaedic Centre, Ullevaal University Hospital, NIMI Ullevaal, Sognsveien 75 D, 0805, Oslo, Norway

    Håvard Moksnes & May Arna Risberg

  2. Orthopaedic Center, Ullevaal University Hospital and Medical School and Oslo Sports Trauma Research Center, Kirkeveien 166, 0407, Oslo, Norway

    Lars Engebretsen

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  1. Håvard Moksnes
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Correspondence to Håvard Moksnes.

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Moksnes, H., Engebretsen, L. & Risberg, M.A. Performance-based functional outcome for children 12 years or younger following anterior cruciate ligament injury: a two to nine-year follow-up study. Knee Surg Sports Traumatol Arthr 16, 214–223 (2008). https://doi.org/10.1007/s00167-007-0469-7

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