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Contralateral knee hyperextension is associated with increased anterior tibial translation and fewer meniscal injuries in the anterior cruciate ligament-injured knee

Artikel i vetenskaplig tidskrift
Författare David Sundemo
C. Mikkelsen
R. Cristiani
M. F. Bullet
Eric Hamrin Senorski
Eleonor Svantesson
Kristian Samuelsson
A. Stalman
Publicerad i Knee Surgery Sports Traumatology Arthroscopy
Volym 26
Nummer/häfte 10
Sidor 3020-3028
ISSN 0942-2056
Publiceringsår 2018
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för hälsa och rehabilitering
Institutionen för kliniska vetenskaper, Avdelningen för ortopedi
Sidor 3020-3028
Språk en
Länkar dx.doi.org/10.1007/s00167-018-5047-...
Ämnesord Knee hyperextension, Anterior cruciate ligament reconstruction, Generalized joint hypermobility, joint hypermobility syndrome, early revision surgery, 2-year follow-up, intercondylar roof, risk-factors, reconstruction, laxity, impingement, extension, predictors
Ämneskategorier Ortopedi

Sammanfattning

Purpose To investigate the influence of hyperextension of the contralateral healthy knee on anterior tibial translation (ATT) and the presence of associated injuries in the anterior cruciate ligament (ACL)-injured knee. Methods A local patient data register containing the surgical and clinical data of patients undergoing ACL reconstruction was analyzed. Patients were divided into groups according to the degree of hyperextension of the contralateral knee: normal (Group A <= 0 degrees), mild (Group B 1 degrees-5 degrees), moderate (Group C 6 degrees-10 degrees), and severe (Group D >10 degrees). The ATT was measured in both knees preoperatively and 6 months postoperatively using the KT-1000 arthrometer. The presence of associated meniscal and cartilage injuries was noted. Using multivariate analysis, Groups B, C, and D were compared with Group A, using this group as a reference. Results A total of 10,957 patients were available in the register and 8502 (Group A n= 4335, Group B n=3331, Group C n=771, Group D n= 65) were included in the final analysis. Groups B (10.3 mm; 95% CI 0.06-0.042, p < 0.0001) and C (10.6 mm; 95% CI 0.23-0.89, p =0.006) showed significantly greater preoperative ATT in the injured knee compared with the control group (10.1 mm) Moreover, at the 6-month follow-up, greater ATT was observed for Groups B (8.5 mm; 95% CI 0.13-0.45, p <0.0001), C (8.5 mm; 95% CI 0.02-0.60, p= 0.035), and D (9.1 mm; 95% CI - 0.08-1.77, p =0.082) compared with Group A (8.2 mm). Meniscal injuries were less frequent in patients with contralateral hyperextension [Group B 903 (27.1%) p < 0.0001, Group C 208 (27.0%) p = 0.0003, and Group D 12 (18.5%), 0.012] compared with the control group [Group A 1479 (34.1%)]. Conclusion Contralateral knee hyperextension is associated with greater pre- and postoperative ATT in the ACL-injured knee. In patients with contralateral knee hyperextension, concomitant injuries to the menisci are less frequent. Surgeons should consider grafts with superior properties regarding postoperative anteroposterior laxity to patients with contralateral knee hyperextension.

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