2021 ISAKOS Biennial Congress ePoster
Anterior Cruciate Ligament (Acl) Reconstruction With Lateral Plasty Restores Anterior-Posterior Laxity In The Case Of Concurrent Partial Medial Meniscectomy
Alberto Grassi, PhD, Bologna ITALY
Stefano Di Paolo, Eng, PhD, Bologna ITALY
Nicola Pizza, MD, Bologna ITALY
Gian Andrea Lucidi, MD, Bologna ITALY
Giacomo Dal Fabbro, MD, Sydney, New South Wales AUSTRALIA
Stefano Zaffagnini, MD, Prof., Bologna ITALY
Rizzoli Orthopaedic Institute, Bologna, ITALY
FDA Status Not Applicable
Summary
Surgeons should consider the addition of a lateral plasty when medial meniscectomy needs to be performed.
ePosters will be available shortly before Congress
Abstract
Purpose
To evaluate the in-vivo knee laxity in presence of a partial medial meniscectomy before and after a Single-Bundle ACL reconstruction with the addition of a lateral plasty (SBLP) and to compare it with the knee laxity after a Single-Bundle ACL reconstruction (SB).
Methods
101 patients with ACL tear were included in the study and grouped according to the surgical technique and the meniscus treatment: regarding the SBLP technique (n=55), 31 patients underwent isolated ACL reconstruction (“SBLP Isolated ACL Group”), while 24 patients underwent combined ACL reconstruction and partial medial meniscectomy (“SBLP ACL+MM Group”); regarding the SB technique (n=46), 33 patients underwent isolated ACL reconstruction (“SB Isolated ACL Group”), while 13 patients underwent combined ACL reconstruction and partial medial meniscectomy (“SB ACL+MM Group”). Anterior-Posterior clinical laxity at 30° (AP30) and 90° (AP90) of knee flexion were quantified before and after surgery through a surgical navigation system dedicated to kinematic assessment.
Results
In the ACL-deficient status, the antero-posterior laxity was significantly higher in presence of a combined MM in both the AP30 and the AP90, with no differences between the two surgical techniques. After the ACL reconstruction, both AP30 and AP90 translations decreased significantly (p<0.0001) compared to the ACL-deficient status. No differences were found for AP30 and AP90 between SBLP Isolated ACL and SBLP+MM groups, while a significantly higher AP90 translation was found for the SB+MM group compared to the SB Isolated ACL group. Moreover, the AP90 translation in the SB ACL+MM group was significantly higher than the one of the other three groups, i.e., SBLP ACL+MM, SB, and SBLP Isolated ACL group.
Conclusion
The addition of a lateral plasty compensated the effect of a medial meniscectomy on AP knee laxity in the context of an ACL surgery.