The<unk>  devices are metal-on-metal articulating devices which differ from total hip replacement devices because they are more bone conserving and retain the natural geometry (so-called large ball THR devices share this trait). A THR requires that the upper portion of the femur bone be cut off to accept the stem portion of a THR device. The femur cap of the<unk>  devices does not require the femur bone be cut off; instead the top of the femoral head is shaped to closely fit the underside of the cap. Both<unk>  and hip replacement require that a cup is placed in the acetabulum of the hip socket. The main advantage of the<unk>  surgery is that when a revision is required, there is still an intact femur bone left for a THR stem. When a THR stem requires a revision, the metal stem in the femur has to be removed and often more bone is lost in the process of removal and replacement with a larger diameter stem. Having a<unk>  at a younger age means that a revision will likely be easier to perform when required. Recent studies have shown that the outcome of a<unk>  is dependent on surgeon experience and that proper positioning of<unk>  components is crucial. Therefore, in addition to ensuring that a proven device is used, care should be taken in selecting a surgeon with experience and a good track record. Although formal labeling restrictions exist in some countries, including the United States,<unk>  may allow younger, active people to return to many activities they enjoyed prior to their hip problems, which is an advantage over a traditional hip arthroplasty. The large size cap and cup of the<unk>  devices are the same size as a person's original ball and socket and thus are less prone to dislocation. An often forgotten but very important advantage of<unk>  and thereby the retention of the femoral neck is the fact that<unk>  has the least measurable amount of "stress shielding" when compared to any type of THR. This means that with<unk>  the femur's upper portion fully retains its natural mechanical characteristics under load, also ensuring less disturbance of the processes that take place inside bone that is alive.
Hip resurfacing
Finger joint replacement
Ankle replacement
High tibial osteotomy
Heel lift
Hip replacement
Reverse shoulder replacement
Ulnar collateral ligament reconstruction