en LETTER TO THE EDITOR Polyaxial Locking Cap Plate, Displaced Olecranon Fractures, Internal Fixation 857 858 https://abjs.mums.ac.ir/article_27038.html Kang Qin qinkang@smu.edu.cn 118702 Yes Department of Shoulder and Elbow Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China -Shoulder Research Institute, Academy of Orthopedics Guangdong Province, China Liang Zhao zhaoliang717@sina.com 118703 No Department of Shoulder and Elbow Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China -Shoulder Research Institute, Academy of Orthopedics Guangdong Province, China Yijun Wang wangyj678@163.com 118704 No Department of Shoulder and Elbow Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China -Shoulder Research Institute, Academy of Orthopedics Guangdong Province, China