screw fixation apparatus, and method for implanting an intramedullary screw within the medullary canal. an intramedicular screw (20) for insertion into the medullary canal (26) into a bone (24) surrounded by the cortex (28) and defines a hole (34) extending transversely to the intramedullary screw (20). a threaded fastener (22) extends along an axis of the fastener (a) and has a compression portion (48) having a diameter of the compression portion (dcp), and a threaded portion (50) which It has a threaded portion diameter (Dp) extending through a proximal cortex hole (40) and a distal cortex hole (42), both holes (40, 42) radially overlapping hole (34). and the diameter of the threaded portion (dtp) threadedly engaging the bore (34). a compression transmission device (54) has an exterior (56) and an interior (58) and defines an interior space for transmitting the compression load from the threaded fastener (22) to the intramedullary screw (20). the threaded fastener (22) extends through the compression transmission device (54) and the intramedullary screw (20) and the distal cortex hole (42) to threadably engage the hole (34) and the intramedullary screw attachment (20) within the medullary canal (26). the interior space of the pressure transmission device (54) is larger than the diameter of the compression portion (dc) of the fastener (22) to provide the space at least partially around the threaded fastener (22) to allow the axis of the fastener (a) to be variably arranged with respect to the interior space.aparelho fixador de parafuso, e, método para implantar um parafuso intramedular dentro do canal medular. um parafuso intramedicular (20) para inserção no canal medular (26) em um osso (24) circundado pelo córtex (28) e define um furo (34) que se estende transversalmente em relação ao parafuso intramedular (20). um fixador rosqueado (22) se estende ao longo de um eixo do fixador (a) e tem uma porção de compressão (48) que tem um diâmetro da porção de compressão (
