Abstract
Purpose
To investigate the effect of remnant preservation on tibial tunnel enlargement in a single-bundle anterior cruciate ligament (ACL) reconstruction with a hamstring autograft.
Methods
From 2006 to 2009, a total of 62 patients who underwent single-bundle ACL reconstruction with a quadrupled hamstring tendon autograft were enrolled in this study. The patients were randomly divided into two groups: the preserving-remnant group and the removing-remnant group. Plain radiographs were taken at 1 week, and 3, 6, and 24 months postoperatively, and tibial tunnel enlargement was evaluated. The postoperative clinical assessment included the Lysholm rating scale and KT-1000 measurement.
Results
In total, 27 patients in the preserving-remnant group and 24 patients in the removing-remnant group were followed up and the median follow-up was 24.5 months (range 24–27 months). Tibial tunnel enlargement occurred within 6 months postoperatively. Positive enlargement was observed in 8 patients (29.6 %) in the preserving-remnant group and 14 patients (58.3 %) in the removing-remnant group (P = 0.0388). The percentage of tibial tunnel enlargement was 25.7 ± 6.7 and 34.0 ± 8.9 % in the preserving- and removing-remnant groups, respectively (P = 0.0004). In the preserving-remnant group, the average Lysholm score increased from 60.3 ± 5.3 (51–69) to 93.0 ± 3.5 (88–100), and the side-to-side difference of the KT-1000 changed from 6.3 ± 0.9 (5.1–8.0) to 1.4 ± 0.6 (0.5–2.4) mm. In the removing-remnant group, the average Lysholm score increased from 58.7 ± 6.5 (48–71) to 91.1 ± 3.9 (85–100), and the side-to-side difference of the KT-1000 changed from 6.5 ± 0.8 (5.4–8.2) to 1.7 ± 0.6 (0.6–2.8) mm.
Conclusions
It is confirmed that remnant preservation in ACL reconstruction can resist tibial tunnel enlargement but that this technique does not affect the short-term clinical outcome of ACL reconstruction.
Level of evidence
I.
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Acknowledgments
The authors thank S. Kelly and L. Christina (American Journal Experts) for editing the present paper.
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The authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.
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Zhang, Q., Zhang, S., Cao, X. et al. The effect of remnant preservation on tibial tunnel enlargement in ACL reconstruction with hamstring autograft: a prospective randomized controlled trial. Knee Surg Sports Traumatol Arthrosc 22, 166–173 (2014). https://doi.org/10.1007/s00167-012-2341-7
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DOI: https://doi.org/10.1007/s00167-012-2341-7