Medium to long-term follow-up after ACL revision

Area of Science:

• Orthopedic surgery
• Sports medicine
• Biomedical engineering

Background:

• Anterior cruciate ligament (ACL) tears are common injuries, often requiring surgical reconstruction.
• Revision ACL reconstruction is performed when the primary surgery fails, aiming to restore knee function.
• Understanding the long-term outcomes of revision ACL reconstruction is crucial for patient management and surgical planning.

Purpose of the Study:

• To evaluate the epidemiology and clinical outcomes of revision anterior cruciate ligament (ACL) reconstruction.
• To assess patient-reported outcomes and knee stability up to 9 years after revision ACL surgery.

Main Methods:

• Retrospective case series (Level IV evidence) of patients undergoing revision ACL reconstruction between 2001 and 2007.
• Follow-up assessments included objective IKDC, KOOS, Tegner, SANE scores, KT-1000 laxity measurements, and reoperation/complication data.
• Data collected in 2010 provided intermediate follow-up of up to 9 years.

Main Results:

• 128 patients were analyzed with a median follow-up of 6 years.
• Subjective scores showed improvement in sports and quality of life, but remained impaired.
• Objective knee laxity (KT-1000) improved significantly post-revision (2.5 mm vs. 6.2 mm preoperatively).
• Re-revision rate was 6%, with 2 patients requiring total knee replacement.

Conclusions:

• Revision ACL reconstruction can achieve acceptable knee stability.
• Significant knee impairment persists, indicated by lower subjective scores in sports and quality of life.
• Proper patient counseling regarding expected outcomes is essential for revision ACL reconstruction.