Mechanically or Kinematically Aligned Total Knee Prosthesis

Clinique du Sport, Bordeaux Mérignac120 enrolled

Overview

The mechanical alignment technique (Mechanical Alignment - MA) of a total knee prosthesis (TKA) was developed with the aim of making the installation of a TKA simple and reproducible, and that the prosthetic biomechanics are acceptable, thus promoting good longevity of implants. This is a technique that does not aim to restore the constitutional anatomy of the knee; bone cuts are systematically made at fixed angles, in the 3 planes of space, in relation to the mechanical axes of the long bones (femur and tibia). This non-personalized implantation technique therefore systematically alters the anatomy, laxity and kinematics of the knee, causing up to 50% of residual symptoms after prosthetic implantation and 20% of dissatisfied patients. In order to improve the clinical results of TKA, a new, more personalized and physiological technique was developed in 2007, called Kinematic Alignment (KA). This technique aims to restore the pre-arthritic anatomy, unique to each knee. Patients with severe constitutional deformity of the lower limb therefore retain this deformity after kinematic prosthetic replacement. The impact of the alignment technique on the biomechanics of the prosthetic knee remains poorly described. The main objective of this study is therefore to compare knee biomechanics between mechanical TKA and kinematic TKA.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

120

Conditions

Osteoarthritis, Knee

Interventions

kinematic knee prosthesisDEVICE

Patients with a kinematically aligned total knee prosthesis and having a post-operative follow-up consultation within at least 1 year after their surgery are consecutively pre-selected according to the eligibility criteria.

biomechanic knee prosthesisDEVICE

A group of patients with a mechanically aligned TKA and scheduled for a follow-up consultation 1 year after surgery will be identified to be matched on the aforementioned criteria (sex, age, BMI).

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patient followed as part of a consultation 1 year after TKA placement * Adult patient * Patient affiliated to a social security system * Patient informed of the study and formally included (signing of informed consent) before the first research review Exclusion Criteria: * Patient with a contralateral knee prosthesis * Patient with another condition (acquired pathology) of the lower limbs (e.g. severe osteoarthritis of the contralateral knee or hip/ankle) and/or of the nervous system (e.g. Parkinson's) which may significantly affect the quality of walking * Pregnant patient * Patient deprived of liberty by judicial or administrative decision, * Adult patient subject to a legal protection measure or unable to express consent

Locations (1)

Clinique du Sport Bordeaux Merignac

Mérignac, France

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