Internal bone fixation devices and methods for using the devices for repairinga weakened or fractured bone are disclosed herein. A device for use in repairinga fractured bone includes a delivery catheter having an elongated shaft witha proximal end, a distal end, and a longitudinal axis therebetween, wherein thedelivery catheter has an inner void for passage of at least one reinforcing materialand an inner lumen for passage of a light source; a conformable member releasablyengaging the distal end of the delivery catheter, wherein the conformable membermoves from a deflated state to an inflated state when the at least one reinforcingmaterial is delivered to the conformable member; and an adapter releasably engagingthe proximal end of the delivery catheter for receiving the light source and theat least one reinforcing material.