ArticleJournal of experimental orthopaedics2026
An exploratory study of relationships among morphological and mechanical properties of the patellar tendon and patient-reported outcomes after ACLR using BPTB autograft.
Article in Journal of experimental orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: Patellar tendon structural and mechanical properties undergo significant remodelling after anterior cruciate ligament (ACL) reconstruction (ACLR) using a bone-patellar tendon-bone (BPTB) autograft. Tendon properties have been described at different time points after surgery, but their relationship to patient-reported outcome measures (PROMs) is unclear. The purpose of this investigation was to assess how patellar tendon structure relates to PROMs after ACLR using BPTB autograft. Methods: Thirty-four individuals with unilateral ACLR using a BPTB autograft participated in this secondary exploratory analysis. At time points 1, 3-4, and 6-9 months after surgery, PROMs were completed and tendon properties (cross-sectional area [CSA], thickness, shear modulus, and viscosity) were assessed using B-mode ultrasound imaging and continuous shear wave elastography. Simple linear regressions evaluated the relationship between Limb Symmetry Index of tendon properties (LSI, [involved ÷ uninvolved] × 100) at each time point and PROM scores at the 6-9-month time point. Multiple regressions assessed associations between involved limb tendon properties at all three time points and PROMs at 6-9 months, adjusting for age, sex, body mass index (BMI), and time from surgery. Results: Shear modulus LSI at 1 month was negatively correlated with Anterior Cruciate Ligament-Return to Sport after Injury (ACL-RSI) scores at 6-9 months ( Conclusion: Limb symmetry in tendon properties, but not involved limb properties alone, was associated with PROMs 6-9 months after ACLR using BPTB autograft. This suggests that limb symmetry of tendon properties may relate to self-reported recovery. Level of Evidence: Level II.
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