Abstract
Data from the Australian Joint Register suggests that the revision rate for cruciate retaining [CR] prosthesis is less than for cruciate sacrificing prosthesis[PS]. We have analysed data from the NZOA joint register to see if this is the case in NZ.
Data for all PS and CR knee replacements in NZ between 1999 and 2004, and any subsequent revisions were analysed and the results compared with the AOA registry data [2008]. There were 3808 PS knees and 7152 CR knees on the AOA register, with a seven year revision rate of 3.3% and 2.1% respectively p=.002. On the NZOA register there were 1869 PS knees and 5749 CR knees, with a five year revision rate of 1.55% and 1.39% respectively p=.608
This aspect of prosthesis design did not influence the revision rate at five years.
Correspondence should be addressed to: Associate Professor N. Susan Stott, Orthopaedic Department, Starship Children’s Hospital, Private Bag 92024, Auckland, New Zealand.
