Prosthesis type	Identified in stage 1	Analyzed in stage 2	Reviewed in stage 3	Identified overall	Newly identified in 2011
Hips
Total conventional	150	83	56	42	13
Total resurfacing	7	6	6	5	1
Knees
Unicompartmental	5	6	6	6	1
Total knee	55	28	27	25	2
Total	217	123	95	78	17