It is possible to register bone resorption around implants with DXA before resorption becomes visible on conventional x-ray films in the form of "radiolucent lines" (RLL). It is important to monitor remodelling in the periprosthetic bone because decreasing BMD may weaken the prosthetic fixation and lead to failure. It is known that BMD decreases initially after implant surgery and then stabilize after a periode of a few years.