The objective of this study was to compare rates of anterior cruciate ligament (ACL) failure between pediatric and adolescent patients to evaluate patella alta as a high risk variable.

Methods

Demographic and surgical data were retrospectively queried for patients =18 years of age with primary ACL reconstruction performed at a single academic center between 2011-2016 and minimum of 2-year clinical surveillance. Patellar height indices, including Caton-Deschamps Index (CDI) and Insall-Salvati Index (ISI), were retrospectively calculated from preoperative imaging to assess the presence of patella alta. Failure was defined as (1) ACL graft re-rupture, (2) grade 2+ Lachman, (3) presence of pivot shift, and (4) side-to-side difference of 3 mm on KT-1000 arthrometer.

Results

A total of 185 patients (84 female, 101 male) and 194 knees were identified, with an average age of 16.2 ± 1.8 years. Of these, 30 (15.46%) experienced ACL failure.

Conclusion

Male sex was associated with increased rates of re-rupture (p = 0.013), but there were no significant findings with regards to age, graft selection technique, or fixation device. There were also no significant differences in rates of ACL re-rupture between pediatric patients with and without patella alta (p = 0.277).

Level of Evidence: IV – Therapeutic case series
Key words: Anterior cruciate ligament, patella alta, Caton-Deschamps Index, Insall-Salvati Index, re-rupture

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Rates of Anterior Cruciate Ligament Re-rupture in Pediatric and Adolescent Patients with and without Patella Alta

Rates of Anterior Cruciate Ligament Re-rupture in Pediatric and Adolescent Patients with and without Patella Alta

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Methods

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Conclusion

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Rates of Anterior Cruciate Ligament Re-rupture in Pediatric and Adolescent Patients with and without Patella Alta

Rates of Anterior Cruciate Ligament Re-rupture in Pediatric and Adolescent Patients with and without Patella Alta

Background

Methods

Results

Conclusion