Differences in postoperative knee function based on concomitant treatment of lateral meniscal injury in the setting of primary ACL reconstruction.

• Concomitant lateral meniscal (LM) injuries are common in acute anterior cruciate ligament (ACL) ruptures. However, the effect of addressing these injuries with various treatment methods during primary ACL reconstruction (ACLR) on patient-reported outcomes (PROs) is unknown. Therefore, the purpose of this study was to compare postoperative Knee injury and Osteoarthritis Outcome Score (KOOS) at 2-, 5-, and 10-years after isolated primary ACLR to primary ACLR with various treatment methods to address concomitant LM injury.This study was based on data from the Swedish National Knee Ligament Registry. Patients≥15years with data on postoperative KOOS who underwent primary ACLR between the years 2005 and 2018 were included in this study. The study population was divided into five groups: 1) Isolated ACLR, 2) ACLR+LM repair, 3) ACLR+LM resection, 4) ACLR+LM injury left in situ, and 5) ACLR+LM repair+LM resection. Patients with concomitant medial meniscal or other surgically treated ligament injuries were excluded.Of 31,819 included patients, 24% had LM injury. After post hoc comparisons, significantly lower scores were found for the KOOS Symptoms subscale in ACLR+LM repair group compared to isolated ACLR (76.0 vs 78.3, p=0.0097) and ACLR+LM injury left in situ groups (76.0 vs 78.3, p=0.041) at 2-year follow-up. However, at 10-year follow-up, no differences were found between ACLR+LM repair and isolated ACLR, but ACLR+LM resection resulted in significantly lower KOOS Symptoms scores compared to isolated ACLR (80.4 vs 82.3, p=0.041).The results of this study suggest that LM injury during ACLR is associated with lower KOOS scores, particularly in the Symptoms subscale, at short- and long-term follow-up. However, this finding falls below minimal clinical important difference and therefore may not be clinically relevant.III.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine (hsv//eng)

Keyword

Humans

Knee Joint

Menisci

Tibial

surgery

Meniscectomy

Arthroplasty

Replacement

Knee

Anterior Cruciate Ligament Injuries

complications

diagnosis

surgery

Publication and Content Type

ref (subject category)

art (subject category)