Hip stem components that are specified by the manufacturer as anchoring in the metaphy- seal area. These include: Femoral neck-preserving systems, in which only the femoral head is removed and the femoral neck is left intact, femoral neck-preserving systems, in which parts of the femoral neck are also removed, and femoral neck-resecting systems, in which the femoral neck is also completely removed.
- Standard TKA
Describes “unconstrained/minimally stabilised” knee systems such as cruciate-retaining/sacrificing, pure cruciate-sacrificing and also posterior stabilised systems without varus-valgus stabilisation.
- Surface replacement (hip)
Surface replacement of the femoral head (resurfacing head) and/or the acetabular cup (surface replacement cup). The "resurfacing head” is used to describe a femoral component that is designed only to cover the patient’s own femoral head. There may be an anchoring device which is integral to the component and which extends into the femoral neck. It is used with a corresponding “surface replacement cup” which is made of one piece of material (monobloc).