A surgical implant system comprising: a spiked washer for impacting against the proximal end of a bone so as to achieve fixed positioning relative to the proximal end of the bone and an intramedullary screw for advancement through the washer and down the intramedullary canal of a bone. The intramedullary screw comprises a shaft and a head, distal threads formed on the shaft for engaging the wall of the intramedullary canal at the distal end of the intramedullary screw and proximal threads formed on the shaft for engaging the wall of the intramedullary canal at the proximal end of the intramedullary screw so as to generate a compressive force therebetween. The head comprises locking threads for engaging the screw threads formed in the spiked washer, whereby to lock the intramedullary screw to the spiked washer.
