Abstract
To compare postoperative objective knee stability and clinical outcomes between double-bundle (DB) anterior cruciate ligament reconstruction (ACLR) and single-bundle (SB) ACLR combined with lateral extra-articular tenodesis (LET). ACL-injured patients with grade 3 pivot-shift who underwent either DB ACLR (DB ACLR group) or SB ACLR with LET (SB ACLR+LET group) were enrolled. All patients who met inclusion and exclusion criteria were retrospectively evaluated for knee laxity (the anterior translation and pivot-shift grade), clinical outcomes using the International Knee Documentation Committee (IKDC) examination form, Kellgren-Lawrence grade, graft maturation score on second-look arthroscopy, and revision rates at the last follow-up. From an initial cohort of 171 consecutive patients over a 3-year period, 95 (56%) met inclusion and exclusion criteria. The SB ACLR+LET group (n= 47) showed significantly better results in pivot-shift grade at the last follow-up as compared with the DB ACLR group (n= 48) (P= .021). In the SB ACLR+LET group, 93.6% (44/47) were grade 0, whereas 72.9% (35/48) in the DB ACLR group were grade 0. The SB ACLR+LET group (grade A: 42, grade B: 4 and grade C: 1) showed significantly superior results in IKDC objective grade compared with the DB ACLR group (grade A: 32; grade B: 8; and grade C: 8) (P= .017). However, no statistically significant difference could be shown in anterior translation, subjective functional IKDC score, or revision rate between the 2 groups. The mean follow-up duration was 49.7 ± 5.7 months. SB ACLR+ LET demonstrated fewer pivot-shifts (P= .021) and superior IKDC objective grades (P= .017) than a DB ACLR at a mean follow-up of almost 50 months. Level III, retrospective comparative study.
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