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. 2002 Jan 15;26(1):48–51. doi: 10.1007/s00264-001-0316-2

Comparison of two total knee prostheses on the incidence of patella clunk syndrome

D Ip 1, W Wu 1, W Tsang 1
PMCID: PMC3620851  PMID: 11954850

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.

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