Abstract:

Objective　To analyze biomechanical characteristics of HNT-STTAC and NT-STTAC on digital images of scaphoid, trapezium and trapezoid finished by finite element software, and provide basis for clinical application. 　Methods　The three-dimensional maps of two kinds of NT-STTAC were loaded into the finite element software ANSYS, for analyzing mechanical properties of them. The difference of stress, strain value, distribution and compression stiffness were measured and compared, at the wrist position of palm flex and back-stretch.　Results　Under the simulation of NT-STTAC force, mechanical stability under the resistance of axial tensile force and axial compression, were analyzed. Stiffness value of Solid NT - STTAC in the certain scope, was better than HNT-STTAC. However, stiffness value had no difference at other positions.　Conclusions　According to our work, stiffness parameters and mechanical stability of HNT-STTAC and NT-STTAC have no difference. HNT - STTAC is reliable for clinical application.

Key words: Finite element, Biomechanics, Wrist, Wrist collapse, STTAC