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Anterior Cruciate Ligament (Acl) Reconstruction With Lateral Plasty Restores Anterior-Posterior Laxity In The Case Of Concurrent Partial Medial Meniscectomy

2021 Congress Paper Abstracts

Anterior Cruciate Ligament (Acl) Reconstruction With Lateral Plasty Restores Anterior-Posterior Laxity In The Case Of Concurrent Partial Medial Meniscectomy

Alberto Grassi, MD, ITALY Stefano Di Paolo, Eng, ITALY Nicola Pizza, MD, ITALY Gian Andrea Lucidi, MD, ITALY Giacomo Dal Fabbro, MD, ITALY Stefano Zaffagnini, MD, Prof., ITALY

Rizzoli Orthopaedic Institute, Bologna, ITALY


2021 Congress   ePoster Presentation     rating (1)

 

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Anatomic Structure

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Sports Medicine

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Summary: Surgeons should consider the addition of a lateral plasty when medial meniscectomy needs to be performed.


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.


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