Patella position is not a determinant for anterior

Authors: Albert H van Houten Petra J C Heesterbeek Ate B Wymenga

Publish Date: 2015/12/24

Volume: 24, Issue: 8, Pages: 2656-2662

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Abstract

A 10year followup of a cohort of 55 patients 63 TKAs who received the balanSys™ cruciateretaining total knee system Mathys Ltd Bettlach Switzerland between 1999 and 2002 was performed Patients had undergone the balanced gap technique with either a fixed bearing or an APglide bearing Standardised diagnostic questions regarding AKP were collected and categorised into two groups those with and without AKP The lateral patellar tilt patellar displacement measurement and modified InsallSalvati ratio were used for patella position evaluation on skyline radiographs The Knee Society Score KSS the Knee Osteoarthritis Outcome Score KOOS and Numerical Rating Scales NRS for pain and satisfaction were obtained at followupSixteen patients in the study population experienced AKP Incidence of AKP fixed bearing 13/44 APglide bearing baring 3/17 was not dependent on type of insert ns There were no statistical differences in patella position and tibiofemoral contact point between the AKP group and the no AKP group ns KSS KOOS NRSpain and NRSsatisfaction were significantly lower for the patients with AKP all p  005Twentysix percentage of the patients experienced AKP 10 years after balanced gap TKA Postoperative patella positioning was not found to be a determinant for anterior knee pain after TKA However patellar displacement does not seem completely favourable Moreover type of bearing was not found a determinant for AKP at longterm followup

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