2021 ISAKOS Biennial Congress ePoster
Alignment Adjustment Using The Valgus Stress Technique Can Increase The Surgical Accuracy Of Novice Surgeons During Medial Opening-Wedge High Tibial Osteotomy
Man-Soo Kim, MD, PhD, Seoul KOREA, REPUBLIC OF
Yong Gyu Sung, MD, Seoul KOREA, REPUBLIC OF
Dong-Chul Park, MD, Seoul, South Korea KOREA, REPUBLIC OF
Jae Jung Kim, MD, Seoul KOREA, REPUBLIC OF
Yong In, MD, PhD, Seoul KOREA, REPUBLIC OF
Seoul St. Mary's Hospital, Seoul, Seoul, KOREA, REPUBLIC OF
FDA Status Cleared
Summary
Adhering to the “alignment adjustment under valgus stress technique” protocol enabled novice surgeons to achieve similar surgical accuracy as that of an expert surgeon in coronal alignment during MOWHTO.
ePosters will be available shortly before Congress
Abstract
Introduction
The purpose of this study was to compare the degree of accuracy of coronal alignment correction with use of the “alignment adjustment under valgus stress technique” between expert and novice surgeons during medial opening-wedge high tibial osteotomy (MOWHTO).
Methods
Forty-eight patients who underwent MOWHTO performed by an expert surgeon (expert group) and 29 by a novice surgeon (novice group) were enrolled in analysis. During surgery, lower-extremity alignment was corrected using the “alignment adjustment under valgus stress technique”. Normocorrection was defined as a weight-bearing line ratio between 55% and 70% and the correction accuracy was compared between expert and novice groups using the ratio of normocorrection to outliers. The clinical outcomes were also compared using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) at one year after surgery.
Results
The undercorrection rate was 14.6% in the expert group and 13.8% in the novice group, while the overcorrection rate was 2.1% in the expert group and 3.4% in the novice group. In the ratio of normocorrection to outliers, no difference was found between the two groups at the one-year follow-up visit (83.3% in the expert group vs. 82.8% in the novice group; p > 0.05). Also, no significant differences were seen in WOMAC subscores immediately preoperatively and at one year after surgery (all p > 0.05).
Conclusion
Adhering to the “alignment adjustment under valgus stress technique” protocol enabled novice surgeons to achieve similar surgical accuracy as that of an expert surgeon in coronal alignment during MOWHTO.