Erschienen in:
27.05.2019 | Arthroscopy and Sports Medicine
Does non-contact or delayed contact of an adjustable-loop femoral button affect knee stability following anterior cruciate ligament reconstruction?
verfasst von:
Sueen Sohn, In Jun Koh, Man Soo Kim, Kwang Yun Song, Yong In
Erschienen in:
Archives of Orthopaedic and Trauma Surgery
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Ausgabe 10/2019
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Abstract
Background
The purpose of this study was to investigate whether cortical non-contact or delayed contact of an adjustable-loop button for femoral fixation could affect knee stability following anterior cruciate ligament (ACL) reconstruction.
Methods
Eighty subjects who underwent single-bundle ACL reconstruction using an adjustable-loop femoral cortical button were retrospectively reviewed regarding patient demographics, graft size, combined surgery, and postoperative 2-year results of knee stability, functional scores, and radiographic tunnel widening. We compared the contact and the non-contact groups determined by position of the button observed in immediate postoperative radiographs. According to 2-year postoperative radiographs, the non-contact group was further divided into two subgroups (delayed contact and persisting non-contact subgroups) and results were compared.
Results
The contact group had 46 patients and the non-contact group had 34 patients. The average gap distance in the non-contact group was 1.9 ± 0.6 (1.1–3.4) mm. There were no significant differences in KT-1000 arthrometric knee stability (p = .667) or Lysholm score (p = .198), or International Knee Documentation Committee (IKDC) score (p = .091) between the two groups. No significant differences in tunnel widening were found at femoral and tibial tunnels on anteroposterior and lateral radiographs (p > .1, all tunnels). In addition, delayed contact subgroup and persisting non-contact subgroup showed similar radiographic and clinical outcomes.
Conclusion
Surgeons should strive to obtain cortical contact of the adjustable-loop femoral button. Nevertheless, cortical non-contact with less than 3 mm of gap distance did not affect knee stability, radiographic outcomes, or clinical outcomes.
Level of evidence
Level III, retrospective comparative study.