Hip joint center localisation: A biomechanical application to hip arthroplasty population.
OBJECTIVE
To determine hip joint center (HJC) location on hip arthroplasty population comparing predictive and functional approaches with radiographic measurements.


METHODS
The distance between the HJC and the mid-pelvis was calculated and compared between the three approaches. The localisation error between the predictive and functional approach was compared using the radiographic measurements as the reference. The operated leg was compared to the non-operated leg.


RESULTS
A significant difference was found for the distance between the HJC and the mid-pelvis when comparing the predictive and functional method. The functional method leads to fewer errors. A statistical difference was found for the localization error between the predictive and functional method. The functional method is twice more precise.


CONCLUSIONS
Although being more individualized, the functional method improves HJC localization and should be used in three-dimensional gait analysis.
Vicky Bouffard, Mickael Begon, Annick Champagne, François Prince, Department of Kinesiology, University of Montreal, Montreal, Quebec H3C 3J7, Canada.
Vicky
V
Bouffard
Mickael
M
Begon
Annick
A
Champagne
Payam
P
Farhadnia
Pascal-André
PA
Vendittoli
Martin
M
Lavigne
François
F
Prince