Dai Sugimoto1, Benton E Heyworth2, Sara C Carpenito3, Farren W Davis3, Mininder S Kocher2, Lyle J Micheli4. 1. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA; Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital, Boston, MA, USA; Faculty of Sport Sciences, Waseda University, Tokyo, Japan. Electronic address: dai.sugimoto@childrens.harvard.edu. 2. Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital, Boston, MA, USA; Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA. 3. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA; Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital, Boston, MA, USA. 4. The Micheli Center for Sports Injury Prevention, Waltham, MA, USA; Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital, Boston, MA, USA; Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA.
Abstract
OBJECTIVE: To examine the proportion of skeletally immature anterior cruciate ligament reconstructed (ACLR) patients who achieve ≥90% of lower extremity recovery at 6-9 months post-operatively. DESIGN: Cross-sectional study. SETTING: Biomechanical laboratory. PARTICIPANTS: Skeletally immature ACLR patients. MAIN OUTCOME MEASURE(S): Muscular strength (quadriceps, hamstrings, hip abductors, and hip extensors), dynamic balance (anterior reach, posteromedial reach, and posterolateral reach), and functional hops tests (single hop, triple hops, cross-over hops, and 6 m timed hops) were examined. The primary outcome variable was the proportion of the study patients whose limb symmetry index (LSI) were ≥90% during return to sport (RTS) tests. RESULTS: A total of 105 skeletally immature ACLR patients who are planning to return to sporting activities (age: 13.4 ± 1.4 years) were enrolled. The proportion of skeletally immature ACLR patients who achieved ≥90% of LSI in all four strength, three balance, and four hop tests were 20.0%, 65.4%, and 27.8%. In those who completed all test battery (72/105), only 4.2% of skeletally immature ACLR patients demonstrated ≥90% of LSI in all RTS tests. CONCLUSION: A small proportion of skeletally immature ACLR patients demonstrated ≥90% of lower extremity recovery approximately at 7 months following ACLR.
OBJECTIVE: To examine the proportion of skeletally immature anterior cruciate ligament reconstructed (ACLR) patients who achieve ≥90% of lower extremity recovery at 6-9 months post-operatively. DESIGN: Cross-sectional study. SETTING: Biomechanical laboratory. PARTICIPANTS: Skeletally immature ACLR patients. MAIN OUTCOME MEASURE(S): Muscular strength (quadriceps, hamstrings, hip abductors, and hip extensors), dynamic balance (anterior reach, posteromedial reach, and posterolateral reach), and functional hops tests (single hop, triple hops, cross-over hops, and 6 m timed hops) were examined. The primary outcome variable was the proportion of the study patients whose limb symmetry index (LSI) were ≥90% during return to sport (RTS) tests. RESULTS: A total of 105 skeletally immature ACLR patients who are planning to return to sporting activities (age: 13.4 ± 1.4 years) were enrolled. The proportion of skeletally immature ACLR patients who achieved ≥90% of LSI in all four strength, three balance, and four hop tests were 20.0%, 65.4%, and 27.8%. In those who completed all test battery (72/105), only 4.2% of skeletally immature ACLR patients demonstrated ≥90% of LSI in all RTS tests. CONCLUSION: A small proportion of skeletally immature ACLR patients demonstrated ≥90% of lower extremity recovery approximately at 7 months following ACLR.