Single-Bundle Anterior Cruciate Ligament Reconstruction with Semitendinosus Tendon Using the PINN-ACL CrossPin System: Minimum 4-Year Follow-up.
OBJECTIVE
This study evaluated mid-term results of anterior cruciate ligament (ACL) reconstruction using the PINN-ACL CrossPin system that allowed for short graft fixation.


METHODS
Forty-three patients underwent single-bundle ACL reconstruction with a 4-strand semitendinosus tendon graft using the PINN-ACL CrossPin system. Femoral fixation was done using the PINN-ACL CrossPin system, and the tibial side was fixed with post-tie and a bioabsorbable interference screw. The mean follow-up period was 50 months. Evaluation was done using the Lachman test, pivot-shift test, International Knee Documentation Committee (IKDC) score and grade. Anterior displacement was assessed.


RESULTS
There was improvement in the Lachman test and pivot-shift test at final follow-up, form grade II (n=40) or III (n=3) to grade I (n=3) or 0 (n=40) and from grade I (n=20) or II (n=10) to grade I (n=8) or 0 (n=22), respectively. The mean IKDC score was 88.7, and grade A and B were 93.0% at final follow-up. Side-to-side difference was improved from 6.7 mm to 2.1 mm at final follow-up. Complications occurred in 3 patients, a re-ruptured due to trauma at 2 years after surgery and a deep infection and a superficial infection.


CONCLUSIONS
The mid-term follow-up results of ACL reconstruction with the PINN-ACL CrossPin system were satisfactory. The PINN-ACL CrossPin can be considered as a useful instrument for short graft fixation.
Department of Orthopaedic Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
Hee-Soo
HS
Kyung
Department of Orthopaedic Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
Seung-Gil
SG
Baek
Department of Orthopaedic Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
Byoung-Joo
BJ
Lee
Department of Orthopaedic Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
Chang-Hwa
CH
Lee
Anterior cruciate ligament; PINN-ACL CrossPin; Reconstruction; Semitendinosus tendon