No objective criteria exist to help surgeons choose between IM ng and plate fixation for 4-part fractures of the proximal humerus, The goal of this study was to identify radiological criteria that would make one technique a better choice than the other [...] Material and methods: This was a comparative, multicentre, retrospective study o 54 cases of antegrade nailing and 53 cases of plating performed between anuary 2009 and 31 December 2011 for 4-part fractures of the proximal humerus. All patients had a minimum radiological and clinical follow-up of 18 months.