Abstract
Purpose
Newer fixation devices for hamstring (HS) autograft have been introduced over the years, yet the impact of these devices on ACLR outcomes requiring surgical intervention remains unclear. We sought to evaluate the risk of aseptic revision and reoperation after HS autograft ACLR according to various femoral-tibial fixation methods.
Methods
A cohort study was conducted using the Kaiser Permanente ACLR Registry. Primary isolated unilateral ACLR patients who received a HS autograft were identified (2007–2014). Fixation devices were categorized as crosspin, interference, suspensory, or combination (defined as more than one fixation device used on the same side) and femoral-tibial fixation groups used in more than 500 ACLR were evaluated. Cox proportional-hazard regression was used to evaluate the association between femoral-tibial fixation method and outcomes while adjusting for confounders.
Results
6,593 primary ACLR were included. Four femoral-tibial fixation groups had more than 500 ACLR: suspensory–interference (n = 3004, 45.6%), interference–interference (n = 1659, 25.2%), suspensory–combination (n = 1103, 16.7%), and crosspin–interference (n = 827, 12.5%). After adjusting for covariates, revision risk was lower for crosspin–interference (HR = 0.43, 95% CI 0.29–0.65) and interference–interference (HR = 0.63, 95% CI 0.41–0.95) methods compared to the suspensory–interference. In contrast, reoperation risk was higher for crosspin–interference (HR = 2.13, 95% CI 1.37–3.32) and suspensory–combination (HR = 1.68, 95% CI 1.04–2.69) methods compared to suspensory–interference.
Conclusions
ACLR using HS autograft appears to have the lowest risk of aseptic revision when crosspin or interference fixation is used on the femoral side and is coupled with an interference screw on the tibial side.
Level of evidence
III.
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Abbreviations
- ACLR:
-
Anterior cruciate ligament reconstruction
- ACLRR:
-
Anterior cruciate ligament reconstruction registry
- AM:
-
Anteromedial
- BMI:
-
Body mass index
- BPTB:
-
Bone patellar tendon bone
- CI:
-
Confidence interval
- EHR:
-
Electronic health record
- HS:
-
Hamstring
- HR:
-
Hazard ratio
- IQR:
-
Interquartile range
- NKLR:
-
Norwegian Knee Ligament Register
- SD:
-
Standard deviation
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Acknowledgements
The authors acknowledge the Kaiser Permanente orthopaedic surgeons who contribute to the Kaiser Permanente ACLR Registry as well as the Surgical Outcomes and Analysis Department staff, which coordinates registry operations. The authors also acknowledge William E. Burfeind, MAS, and Tom S. Huon, BS, for their ongoing support of the Kaiser Permanente ACLR Registry database and quality control management.
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LMS, HAP, TTF, GBM, and RPC contributed to overall conception and design of the study. LMS, HAP, AM, TTF, GBM, and RPC took part in data acquisition. HAP completed the statistical analysis. LMS, HAP, and RPC drafted the manuscript. LMS, HAP, AM, TTF, GBM, and RPC reviewed the manuscript, contributed to revisions, gave approval of the final draft, and agree to be accountable for all aspects of the work.
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This study was approved by the Kaiser Permanente Institutional Review Board (#5691) prior to commencement.
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Spragg, L.M., Prentice, H.A., Morris, A. et al. Femoral-tibial fixation affects risk of revision and reoperation after anterior cruciate ligament reconstruction using hamstring autograft. Knee Surg Sports Traumatol Arthrosc 27, 3518–3526 (2019). https://doi.org/10.1007/s00167-019-05431-4
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DOI: https://doi.org/10.1007/s00167-019-05431-4