Minimum 10-Year Results of Single- Versus Double-Bundle Posterior Cruciate Ligament Reconstruction: Clinical, Radiologic, and Survivorship Outcomes

• Published in: The American journal of sports medicine 2019-03, Vol.47 (4), p.822-827
• Main Authors: Yoon, Kyoung Ho, Kim, Eung Ju, Kwon, Yoo Beom, Kim, Sang-Gyun
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Arthritis; Biomechanical Phenomena; Biomechanics; Disease Progression; Female; Humans; Knee; Lysholm Knee Score; Male; Middle Aged; Osteoarthritis, Knee - physiopathology; Posterior Cruciate Ligament - diagnostic imaging; Posterior Cruciate Ligament - injuries; Posterior Cruciate Ligament - physiology; Posterior Cruciate Ligament - surgery; Posterior Cruciate Ligament Reconstruction - methods; Radiography; Retrospective Studies; Sports medicine; Treatment Outcome; Young Adult
• ISSN: 0363-5465; 1552-3365
• DOI: 10.1177/0363546518825257

Background: Biomechanical studies have shown that double-bundle (DB) posterior cruciate ligament reconstruction (PCLR) is better than single-bundle (SB) PCLR in restoring normal biomechanical function and stability. However, most clinical studies report no differences between the technical methods, and there is yet no long-term clinical comparative study. Hypothesis: DB PCLR would show superior results and survivorship outcomes to those of SB PCLR in long-term follow-up. Study Design: Cohort study; Level of evidence, 3. Methods: The authors retrospectively evaluated 64 patients who underwent primary PCLR between 2000 and 2008 and were followed up for a minimum of 10 years: 28 patients underwent SB PCLR (mean ± SD: age, 29.1 ± 12.2 years), and 36 underwent DB PCLR (age, 27.0 ± 9.2 years). Clinical scores (International Knee Documentation Committee subjective score, Lysholm score, Tegner activity score), side-to-side difference in stress radiographs, osteoarthritis progression, and survival rate were compared between the SB and DB groups at the last follow-up. Results: At the final follow-up, all clinical scores showed no significant differences between the SB and DB groups. The mean side-to-side difference in stress radiographs (SB, 5.3 ± 3.5 mm; DB, 5.0 ± 3.8 mm; P = .828) and osteoarthritis progression (SB, 14.3%; DB, 13.9%; P = .964) were not different between the groups. The 15-year survival rate was 82.1% for SB PCLR and 83.7% for DB PCLR. Conclusion: Both the SB and DB techniques for PCLR showed satisfactory long-term clinical results and survivorship outcomes. There were no significant differences between SB and DB PCLR in clinical, radiologic, and survivorship outcomes at a minimum follow-up of 10 years. Clinical Relevance: DB PCLR did not show superior clinical results to those of SB PCLR in the long-term follow-up. These results should be considered in the surgical planning for PCLR.