Abstract: The present invention provides molds and methods for producing articulating spacers that are custom-fit to the bone and can be used in two-stage revision knee arthroplasty and other orthopaedic surgery.

Abstract: A spring-loaded, self-retaining, clamp like alignment device used to guide the placement of the acetabular component during total hip arthroplasty is disclosed. The device comprises two longitudinal elements: the first longitudinal element has a proximal end with a handle, a groove within and a spring loaded into the groove. The second longitudinal element has a distal end to which an acetabular component is attached and a mid-section that fits into the groove of the first longitudinal element and a proximal end with a knob. When the hook present at the distal end of the first longitudinal element is placed into the sciatic notch in the pelvic bone and the proximal end clipped to the mid-section of the second longitudinal element, the acetabular component at the distal end of the second longitudinal element is consistently positioned in the acetabulum at 45-degree abduction and 20-degree anteversion.