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The Learning Curve for Biplane Medial Open Wedge High Tibial Osteotomy in 100 Consecutive Cases Assessed Using the Cumulative Summation Method

  • Lee, Do Kyung (Department of Orthopaedic Surgery, Konyang University Hospital, Konyang University College of Medicine) ;
  • Kim, Kwang Kyoun (Department of Orthopaedic Surgery, Konyang University Hospital, Konyang University College of Medicine) ;
  • Ham, Chang Uk (Department of Orthopaedic Surgery, Konyang University Hospital, Konyang University College of Medicine) ;
  • Yun, Seok Tae (Department of Orthopaedic Surgery, Konkuk University Medical Center, Konkuk University School of Medicine) ;
  • Kim, Byung Kag (Department of Orthopaedic Surgery, Joint Center, SungMin Hospital) ;
  • Oh, Kwang Jun (Department of Orthopaedic Surgery, Joint Center, SungMin Hospital)
  • Received : 2017.08.13
  • Accepted : 2017.12.05
  • Published : 2018.12.01

Abstract

Purpose: The purpose of this study was to investigate whether surgical experience could improve surgical competency in medial open wedge high tibial osteotomy (MOWHTO). Materials and Methods: One hundred consecutive cases of MOWHTO were performed with preoperative planning using the Miniaci method. Surgical errors were defined as under- or overcorrection, excessive posterior slope change, or the presence of a lateral hinge fracture. Each of these treatment failures was separately evaluated using the cumulative summation test for learning curve (LC-CUSUM). Results: The LC-CUSUM showed competency in prevention of undercorrection, excessive posterior slope change, and lateral hinge fracture after 27, 47, and 42 procedures, respectively. However, the LC-CUSUM did not signal achievement of competency in prevention of overcorrection after 100 procedures. Furthermore, the failure rate for overcorrection showed an increasing tendency as surgical experience increased. Conclusions: Surgical experience may improve the surgeon's competency in prevention of undercorrection, excessive posterior slope change, and lateral hinge fracture. However, it may not help reduce the incidence of overcorrection even after performance of 100 cases of MOWHTO over a period of 6 years.

Keywords

References

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