Arthroscopy: The Journal of Arthroscopic & Related Surgery
Original ArticleDoes Posterior Tibial Slope Affect Graft Rupture Following Anterior Cruciate Ligament Reconstruction?
Section snippets
Methods
The study included 64 knees of 64 patients who underwent revision ACL reconstruction for ACL graft rupture by a noncontact mechanism from April 2005 to October 2014. Noncontact ACL injury occurs without direct physical contact with other people or objects at the time of injury. The study population consisted of 58 men and 6 women, of mean age 31 years (range, 18-60 years; Table 1). Of the 64 patients, 31 underwent operation on the right knee and 33 on the left knee; 37 underwent index surgery
Results
Mean PTS was significantly higher in patients with (13.2° ± 2.5°; range, 8.5°-18.2°) than without (10.9° ± 3.1°; range, 4.9°-13.6°) rerupture (P < .01; Table 2). When mean PTS was compared in the 37 patients who underwent primary surgery by the same surgeon, it was significantly higher in patients with (13.5° ± 2.5°; range, 8.5°-18.2°) than without (11.1° ± 2.9°; range, 5.1°-13.6°) rerupture (P < .01).
Subgroup analysis of patients with rerupture showed that the mean PTS did not differ
Discussion
This study showed that mean PTS was significantly greater in patients who experienced ACL graft rupture than in matched control patients. However, PTS in patients with ACL graft rupture was not associated with age, gender, BMI, or right or left side injury.
The anatomical factors of a distal femur and a proximal tibia may affect ACL injury.1, 2, 3, 4, 5 Although no consensus has been reached to date, the relationship between PTS and ACL injury has received considerable attention.21, 22, 23, 24
Conclusions
This study showed that mean PTS was significantly greater in patients with than without noncontact ACL graft rerupture (13.2° vs 10.9°, P < .01). The failure of ACL reconstruction appears to be associated with increased PTS, with PTS ≥ 12° a risk factor for the failure of ACL reconstruction.
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The authors report that they have no conflicts of interest in the authorship and publication of this article. Full ICMJE author disclosure forms are available for this article online, as supplementary material.