Knee Surg Relat Res  
Back out of Locking Pin with Hinge Fracture after High Tibial Osteotomy
Shuhei Otsuki, MD, Tomohiko Murakami, MD, Rei Morikura, MD, Kosuke Nakagawa, MD, Yoshinori Okamoto, MD, and Masashi Neo, MD
Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
Correspondence to: Shuhei Otsuki, MD
Department of Orthopedic Surgery, Osaka Medical College, 2-7 Daigakumachi Takatsuki, Osaka 569-8686, Japan
Tel: +81-72-683-1221, Fax: +81-72-683-8553
Received: June 4, 2017; Revised: July 6, 2017; Accepted: July 11, 2017; Published online: April 30, 2018.
© Korean Knee Society. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Low-profile fixation devices for medial opening wedge high tibial osteotomy (OWHTO) were developed in order to avoid skin irritation and additional invasion. However, the low-profile system is associated with additional risks. We report three cases of locking pin back out with the low-profile locking plate system for medial OWHTO.
Keywords: Knee, Osteotomy, Hinge fracture, Locking plate


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