title: Comparison of two total knee prostheses on the incidence of patella clunk syndrome.
abstract: The patella clunk syndrome is not an uncommon complication, particularly after posterior-stabilized (PS) total knee arthroplasty. The present study was a consecutive unselected series comparing the incidence of the patella clunk syndrome amongst two comparable groups of elderly patients with knee arthritis implanted with the Insall-Burstein (IB II) total knee system and the newer NexGen Legacy total knee prosthesis. While 7.5% of patients in the PS IB II group developed patella clunk syndrome, none occurred in the NexGen group (P=0.05). We believe the difference is due mainly to a change in the design of the prosthesis, especially the more posterior intercondylar box and femoral cam of the NexGen femoral component.
authors.affiliation: Department of Orthopaedics and Traumatology, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong. ipd8686@pacific.net.hk
authors.forename: D
authors.initials: D
authors.lastname: Ip
authors.forename: W C
authors.initials: WC
authors.lastname: Wu
authors.forename: W L
authors.initials: WL
authors.lastname: Tsang
mesh_terms: D000368:Aged; D001696:Biomechanical Phenomena; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D015994:Incidence; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010329:Patella / Q000503:physiopathology / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology* / Q000503:physiopathology; D011474:Prosthesis Design; D013577:Syndrome