<qa>  What is the name of the company that applied the porous ingrowth coating of titanium andThe uncemented fixation of the H1 hip resurfacing is not novel. The porous ingrowth coating of plasma sprayed titanium and hydroxyapatite has been applied by a leading implant coating specialist Medicoat AG, Mägenwil, Switzerland. Acetabular cups using these coatings are now standard products with more than 15 years of experience. Several metal-on-metal hip resurfacing designs for non-cemented use, have successfully been implanted in large series of patients. Ti ions may be released as part of the bone ingrowth process of the non-cemented hip of knee prosthesis, but Ti_ions from Titaniumdioxyde TiO2 coatings or Titanium-aluminum-vanadium TiAlV hip or knee arthroplasty components are not associated with toxic, teratogenic or carcinogenic reactions. 