The Korean Journal of Orthodontics enjoyed another great successful year in 2021. Hundreds of wellprepared manuscripts have been submitted from many countries for publication and, in reviewing of those manuscripts, our orthodontic experts have contributed in various ways to maintain a higher standard of the Journal. Among them, we hopes to extend our special thanks to the following international reviewers invited in 2021. Their expertise, dedication, and uncompromising demand for scientific sophistication were all instrumental to assuring the high quality expected by our readers.

Alessandra Lucchese, Italy	Il-Sik Cho, Korea	My Huy Thuc Le, Malaysia
Alessandro Nota, Italy	Insan Jang, Korea	N Bock, Germany
Anadha Gujar, India	Ismaeel Hansa, South Africa	Nam-Ki Lee, Korea
Andrea Scribante, Italy	Jae Hyun Park, United States	Na-young Chang, Korea
Anis Farhan Kamaruddin, Malaysia	Jae-Woo Park, Korea	Niels Ganzer, Sweden
Anne Marie Kuijpers-Jagtman, Netherlands	Janghoon Ahn, Korea	Nikolaos Gkantidis, Greece
Asli Baysal, Turkey	Jeong-Ho Choi, Korea	Nita Viwattanatipa, Thailand
Athbi Alqareer, Kuwait	Ji Hyun Lee, Korea	Noraina Hafizan Norman, Malaysia
Bhavna Shroff, United States	Ji-Hoi Moon, Korea	Norma Ab Rahman, Malaysia
Biju Sebastian, India	Jin Hyoung Cho, Korea	Pablo Echarri, Spain
Carlos Flores Mir, Canada	Jin-Hyoung Cho, Korea	Ramón Domínguez-Mompell Micó, Spain
Carole Charavet, Belgium	Jin-Young Choi, Korea	Renato Bigliazzi, Brazil
Chen Chen, China	Ji-Yeon Lee, Korea	Ryoo Hyun-Mo, Korea
Cheol-Hyun Moon, Korea	Jong-Moon Chae, Korea	Sandra Anic-Milosevic, Croatia
Chooryung Chung, Korea	Jung-Sub An, Korea	Sang Jin Sung, Korea
Chung Ju Hwang, Korea	Jung-Yul Cha, Korea	Sang-Min Lee, Korea
Derya Germec Cakan, Turkey	Kee-Joon Lee, Korea	Sehong Ryu, Korea
Dong-Soon Choi, Korea	Ki Beom Kim, United States	Senka Mestrovic, Croatia
Eddie Hsiang-Hua Lai, Taiwan	Ki-Ho Park, Korea	Seok-Ki Jung, Korea
Eric Jein-Wein Liou, Taiwan	Kwangchul Choy, Korea	Seong Ho Han, Korea
Farhad B. Naini, United Kingdom	Kyung A Kim, Korea	Seong Sik Kim, Korea
Farhan Bazargani, Sweden	Kyung Hwa Kang, Korea	Seong-Hun Kim, Korea
Fernando Martinelli, Brazil	Kyung-Min Lee, Korea	Sertac Aksakalli, Turkey
Gaetano Isola, Italy	Leonardo Tavares Camardella, Brazil	Seung-Hak Baek, Korea
Giampietro Farronato, Italy	Luis Huanca Ghislanzoni, Switzerland	Shengcheng Peng, China
Gulsilay Sayar, Turkey	M. Ali Darendeliler, Australia	Sibel Cetik, Belgium
Gyutae Kim, Korea	Marco Farronato, Italy	Singaraju Gowri Sankar, India
Hiroshi Kamioka, Japan	Masaru Yamaguchi, Japan	Siti Adibah Othman, Malaysia
Hoi-In Jung, Korea	Matilde da Cunha Goncalves Nojima, Brazil	Sohaib Shujaat, Belgium
Hoi-Jeong Lim, Korea	Mihee Hong, Korea	Song Li, China
Hongming Guo, China	Min-Hee Oh, Korea	Stanley Yung-Chuan Liu, United States
Hooman Zarif Najafi, Iran	Min-Ho Jung, Korea	Sug-Joon Ahn, Korea
HyeRan Choo, United States	Minji Kim, Korea	Su-Jung Kim, Korea
Hyeran Helen Jeon, United States	Mithran Goonewardene, Australia	Sung Woon On, Korea
Hyo-Sang Park, Korea	Manuel O Lagravère, Canada	Sung-Hoon Lim, Korea
Hyo-Won Ahn, Korea	Mohamed T Ellabban, Egypt	Sung-Hun Kim, Korea
Hyung Seog Yu, Korea	Mohammad Y Hajeer, Syrian Arab Republic	Sung-Hwan Choi, Korea
Iacopo Cioffi, Canada	Mona Abbassy, Saudi Arabia	Sung-Seo Mo, Korea
Il-Hyung Yang, Korea	Murilo Matias, Brazil	Sun-Hyung Park, Korea
Takashi Ono, Japan	Virpi Harila, Finland	Yong-Taek Jung, Korea
Tetsutaro Yamaguchi, Japan	Visnja Katic, Croatia	Yoon Jeong Choi, Korea
Thomas Tasios, Greece	Wan Nurazreena Wan Hassan, Malaysia	Yoon-Goo Kang, Korea
Tuğba Özkan, Turkey	Wey Mang Chek, Malaysia	Yoon-Ji Kim, Korea
Un-Bong Baik, Korea	Xiulin Yan, China	Young Ho Kim, Korea
Vahid Rakhshan, Iran	Yan Gu, China	Zamri Radzi, Malaysia
Valeriia Kozachenko, Russian Federation	Yocheved Ben-Bassat, Israel