Arch Hand Microsurg 2019; 24(1): 56-62  
Hypertrophic Delayed Union or Nonunion after Ulnar Shortening Osteotomy
Young Woo Kwon1, Jong Woong Park1, Ji Hun Park2, In Cheul Choi1, Jae Jun Nam1, Dong hun Suh3, Jong Woo Kang3
1Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul, Korea, 2Department of Orthopedic Surgery, Korea University Guro Hospital, Seoul, Korea, 3Department of Orthopedic Surgery, Korea University Ansan Hospital, Seoul, Korea
Correspondence to: Jong Woo Kang
Department of Orthopedic Surgery, Korea University Ansan Hospital, 123 Jeokgeum-ro, Danwon-gu, Ansan 15355, Korea
TEL: +82-31-412-5040, FAX: +82-31-412-5802, E-mail: oskang@korea.ac.kr
Received: December 17, 2018; Revised: January 2, 2019; Accepted: January 3, 2019; Published online: March 1, 2019.
© Korean Society for Surgery of the Hand, Korean Society for Microsurgery, and Korean Society for Surgery of the Peripheral Nerve. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Ulnar shortening osteotomy is the most popular surgical technique for ulnar impaction syndrome and has a successful clinical results. However, delayed union and nonunion of the osteotomy site remain the most critical complications and conventionally, plate change and autogenous bone grafting had been performed for the treatment of delayed union and nonunion. The authors present 2 patients who had delayed union and nonunion after ulnar shortening osteotomy using 2.7 mm low profile ulnar shortening osteotomy system and can be treated with only additional mini plating.
Keywords: Ulna, Osteotomy, Nonunion, Delayed union


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