procurement of drugs and consumables:-1. posterior stabilized fixed bearing knee with asymmetric tibia consisting of : anatomic externally rotated hypoallergenic zirconium oxide femoral component compatible with constrained insert, matching polyethylene fixed ps insert and modular highly polished titanium tibia base plate compatible with stem extension. ( all implant sizes with compatible posterior and anterior referencing instrumentation, one 40gm packet of antibiotic cement at the time of surgery implant should have registry user friendly instrumentation. 2. uncemented total hip replacement system primary collariess, canal filling fully ha coated triple taper stem available in standard and extended offset with compatible oxinium / titanium / ceramicised metal head.