Vermeidung periprothetischer Infektionen

Abstract

Only the consequent implementation of evidence-based procedures can help prevent surgical site infections.

Stress distribution of the patellofemoral joint in the anatomic V-shape and curved dome-shape femoral component: a comparison of resurfaced and unresurfaced patellae

“…Also, certain design features of the trochlear groove could alter the patella kinematics [12, 35, 39], such as the inclusion of a low lateral facet on the anterior flange would predispose the patella to lateral dislocation, while an elevated lateral facet could exacerbate tension in the lateral patellar retinaculum and could lead to excessive contact pressure in the patellofemoral joint [1]. The thickness of the patella or surgical intervention for lateral retinacular release can also affect patellofemoral biomechanics after TKA [20, 29]; increased patellar thickness after resurfacing would increase the amount of patella tilting [50] and might increase the contact pressure on the patellofemoral joint [11]. It has been reported that the maximal contact pressures experienced by the patellofemoral joint are well in excess of the compressive yield strength of UHMWPE [42].…”

“…Although the biomechanics of the patellofemoral joint have been extensively evaluated with regard to implant design [12, 19, 22, 39] and surgical interventions [20, 30, 36, 45], the contact characteristics of the patella after replacing different features of the femoral component may be intimately linked to the prevalence of patellofemoral joint complications, but such issues have not been well reported on. It was hypothesized that the geometrical design of the anterior trochlear groove could noticeably alter the stress distribution on the patellofemoral joint in both resurfaced and unresurfaced patellae.…”