of the proximal portion the distal portion extending substantially straight in an unstressed state and having flexibility sufficient to permit being along the arc of the insertion path substantially without permanent deformation application_number US 9274808 A description fig1 and 3 show an implant 1 being configured as an intramedullary nail 30 and a curved guide sleeve 10 the intramedullary nail 30 has a leading end 34 and a trailing end 35 with the leading end 34 being configured as a tip furthermore said intramedullary nail 30 comprises a curved first end portion 2 including the trailing end 35 a coupling means 3 arranged at said trailing end 35 and an elastically bendable second end portion 5 adjoining said leading end 34 due to its elasticity said second end portion 5 is bendable from a straight first position into a curved second position such allowing said second end portion 5 to be passed through said guide sleeve 10 the guide sleeve 10 is used as a nail deflection sleeve 40 in the embodiment shown here such permitting that the intramedullary nail 30 must not be inserted straightway into the intramedullary space of a bone 4 fig3 the elasticity of said second end portion 5 allows a curved insertion into the intramedullary space from a lateral side of the bone due to this possibility of a lateral curved insertion of the intramedullary nail 30 the insertion path must not pass through an articulation surface at a longitudinal end of the bone and the.