Method for the estimation of a double hinge kinematic model for the trapeziometacarpal joint using MR imaging.
In this paper, we propose a method to estimate the parameters of a double hinge model of the trapeziometacarpal joint (TMC) by MRI-based motion analysis. The model includes two non-orthogonal and non-intersecting rotation axes accounting for flexion-extension (F-E) and adduction-abduction (A-A). We evaluated the quality of the estimated model parameters in the prediction of the relative motion of the first metacarpal bone with respect to the trapezium. As a result, we obtained that: (a) the estimated location and orientation of the F-E and A-A axes were in agreement with previous in vitro studies, (b) the motion of the first metacarpal predicted by the 2 degrees of freedom (2DoF) model exhibits a maximum surface distance error in the range of about 2 mm and (c) four thumb postures at the boundary of the TMC range of motion are sufficient to provide a good estimation of the 2DoF TMC kinematic model and good reproducibility (~1.7 mm) of the real thumb motion at TMC level.
Cerveri
P
P
Bioengineering Department, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy. pietro.cerveri@polimi.it
De Momi
E
E
Marchente
M
M
Baud-Bovy
G
G
Scifo
P
P
Barros
R M L
RM
Ferrigno
G
G
D000328:Adult; D001696:Biomechanical Phenomena; D052737:Carpometacarpal Joints / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D051222:Trapezium Bone / Q000033:anatomy & histology*