2017 ISAKOS Biennial Congress ePoster #1017

 

Inter-Relationships Between Static and Dynamic Indicators of Knee Recovery Versus Maintenance of Sports Participation at 5-to-10 Years after ACL Reconstruction

Iftach Hetsroni, MD, Associate Prof., Herzliya ISRAEL
Yohay Wiener, B.ed, Netanya ISRAEL
David Ben-Sira, PhD, Netanya ISRAEL
Antonio Dello Iacono, Ph.D, Netanya ISRAEL
Niv Marom, MD, Kfar Saba, ISRAEL
Mischa van Stee, BA, Kfar Saba, Israel ISRAEL
Jonathan Koch, MD, Kfar Saba, Israel ISRAEL
Gideon Mann, MD, Prof., Kfar Saba ISRAEL
Eran Dolev MD, Kfar Saba ISRAEL
Guy Maoz, MD, Ramat Hasharon ISRAEL
Meir Nyska, MD, Prof., Kfar Saba ISRAEL
Moshe Ayalon, PhD, Netanya, Wingate Institute ISRAEL

Meir General Hospital and Zinman College of Sports Sciences at Wingate Institute, Kfar Saba and Netanya, Israel, ISRAEL

FDA Status Not Applicable

Summary

Among a battery of inter-related objective measures of knee recovery, the combination of KT-difference with knee extensors/flexors torque can be used to identify athletes with high likelihood of successful ongoing sports participation at 5-to-10 years after ACL reconstruction.

Abstract

Introduction

Objective

indicators of ongoing sports participation long after ACL reconstruction are not well established. The purpose of this study was to test inter-relationships between static and dynamic indicators of knee recovery and their association with sports participation at 5-to-10 years after ACL reconstruction.

Materials And Methods

30 men after isolated autologous hamstrings ACL reconstruction at the age 18-35 years with 5-to-10 year follow-up that did not sustain re-injuries underwent static and dynamic knee evaluation. This included: KT-difference, knee extensors/flexors isokinetic test, time-to-stabilization and knee moments during single-legged vertical drop test, and single-legged hop for distance. Sports participation was quantified with Tegner/Marx activity level scales, IKDC-subjective, and KOOS-sub-scores. Inter-relationships were tested between the static and dynamic indicators of knee recovery and the success of ongoing sports participation.

Results

Lower KT-difference was associated with higher Tegner/Marx scores (r = -0.39), IKDC-subjective (r = -0.35), and KOOS-QOL (r = -0.39), (all p <0.05). Knee extensors/flexors peak torque recovered 90%, but this small deficiency was significant (p <0.01), and was associated with Tegner/Marx scores (r =0.42 to 0.47, p <0.05), IKDC-subjective and all KOOS-sub-scores (r =0.37 to 0.53, p <0.05). Time-to-stabilization symmetry was associated with lower KT-difference (r =0.37, p <0.05), but was not associated directly with any sports participation score. Knee valgus and extension moments during vertical drop test were associated with single-legged hop for distance, but not with any sports participation score. Single-legged hop for distance symmetry was associated with knee extensors peak torque symmetry (r =0.42, p <0.05), but only with KOOS-ADL among the sports participation scores (r =0.4, p <0.05).

Conclusions

Among a battery of inter-related objective measures of knee recovery, the combination of KT-difference with knee extensors/flexors torque can be used to identify athletes with high likelihood of successful ongoing sports participation at 5-to-10 years after ACL reconstruction.