 The H1 hip resurfacing design is innovative both in its anatomical shape and in the bearing couple materials as there is currently no all-ceramic bearing hip resurfacing implant in clinical use. Ceramic-on-ceramic THA has a proven track record with excellent survivorship results in the arthroplasty registries as well as low complication rates and good functional results from large clinical series. The materials have been thoroughly tested regarding biocompatibility, biomechanical and tribological characteristics, and have been used in over one million clinical cases over the last 11 years, confirming safety of the material. However, a mono-block ceramic acetabular component without a metal shell such as the H1 hip has not yet been used clinically. The concept requires investigation before it can be CE marked and marketed in Europe. 