Article

OBJECTIVE: To investigate static and dynamic postural balance after successful
total ankle arthroplasty by using dynamic posturography. DESIGN: A controlled
trial study. SETTING: A national university orthopedic and rehabilitation
hospital. PARTICIPANTS: Patients (n=30, 21 men, 9 women; mean age, 58y) and age-
and sex-matched healthy controls (n=30). INTERVENTIONS: Thirty patients who
underwent unilateral total ankle arthroplasty with a cementless mobile-bearing
ankle prosthesis and 30 age- and sex-matched healthy control subjects were
included. MAIN OUTCOME MEASURES: Using computerized dynamic posturography,
sensory (sensory organization test [SOT]), and motor (limit of stability [LOS],
rhythmic weight shift [RWS], and weight bearing) impairment assessments were
performed at an average of 15 months after total ankle arthroplasty. RESULTS: In
the SOT, results of the SOT-2 test reflecting mainly proprioception showed no
significant difference between patients and controls, but patients demonstrated
significantly lower scores for SOT-4, -5, and -6 as a measure of dynamic postural
balance and required more hip movement to maintain balance. In the motor-control
tests, patients showed significantly lower measures in indices of LOS test except
the mean reaction time and the forward/backward directional control and on-axis
velocity of the RWS test. Weight bearing was observed asymmetrically in patients.
CONCLUSIONS: Patients had a higher degree of dynamic postural imbalance and
relied less on ankle strategy to maintain balance than controls. Also, patients
showed the deficit of motor control ability as compared with age- and sex-matched
healthy controls.
CI - Copyright 2010 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS