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- W2171034452 abstract "Substantial flexion after total knee arthroplasty (TKA) is required for certain categories of patients who wish to squat or kneel in their daily life. Many factors influence this postoperative flexion, including the prosthesis design. It is therefore valuable to in vivo analyze these factors on three knee prosthesis designs through a study of their intraoperative flexion.The posterior-stabilized (PS) knee prostheses provide better intraoperative flexion than the ultracongruent (UC) model. Of the currently available PS models, the high-flexion ones have better intraoperative flexion than standard models. Our main focus endpoint was the intraoperative flexion achieved, before soft-tissues closure, during TKA surgical procedure.This was a controlled study. Seventy-two osteoarthritic knees requiring TKA were included to compare three selected prosthesis models: the SAL ultracongruent and two PS models (the standard LPS and the LPS Flex). This was a single-operator study, with patients divided into three homogenous, comparable groups, in which intraoperative measurement of flexion was performed using computer-assisted navigation. Statistical analysis allowed comparison of the three models.Intraoperatively, after prosthesis implantation, before soft-tissues closure, the mean flexion of the LPS-Flex was 134 degrees versus 124 degrees for the SAL (p=0.0004); the mean flexion of the standard LPS model was 130 degrees versus 124 degrees for the SAL (p=0.14); the PS Flex model showed no significant difference (p=0.26) in flexion (134 degrees) compared to the standard model (130 degrees). The SAL ultracongruent model seemed to be a factor reducing the intraoperative flexion by 8 degrees compared to the PS models (p<10(-4)).In this study, the PS designs (standard or Flex) provided better intraoperative flexion than the SAL ultracongruent design. However, the LPS Prosthesis did not demonstrate superiority over the standard LPS Prosthesis.Level III, low-power prospective study." @default.
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- W2171034452 date "2010-05-01" @default.
- W2171034452 modified "2023-10-07" @default.
- W2171034452 title "Comparative study of intraoperative knee flexion with three different TKR designs" @default.
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- W2171034452 doi "https://doi.org/10.1016/j.otsr.2009.12.006" @default.
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