%0 Journal Article %T Primary traumatic patellar dislocation %A Chun-Hao Tsai %A Chin-Jung Hsu %A Chih-Hung Hung %A Horng-Chaung Hsu %J Journal of Orthopaedic Surgery and Research %D 2012 %I BioMed Central %R 10.1186/1749-799x-7-21 %K Patella %K Trauma %K Dislocation %K Medial patellofemoral ligament %U http://www.josr-online.com/content/7/1/21/abstract