Finite Element Study On The Treatment Of Dislocation Of Distal Radioulnar Joint With Intelligent Airbag Small Splint

Objective:To explore the effects of intelligent airbag small splint in the treatment of dislocation of distal radioulnar joint,in order to provide some reference for clinical work.Methods:According to CT scan data from the right forearm of a healthy male volunteer,the three-dimensional model of normal distal radioulnar joint was established.According to clinical common injury types,lateral and dorsal dislocation of distal radioulnar joint were established based on the model of normal distal radioulnar joint and reduction lateral and dorsal dislocation of the distal radioulnar joint with intelligent airbag small splint.A high-order tetrahedral mesh model of the upper forearm is established after dividing the finite element mesh.Finite element analysis on lateral and dorsal dislocation models of distal radioulnar joint was conducted in ANSYS 15.0 software to obtain the curves of shift and pressure,the corresponding bone tissue and soft tissue stress values,then the stress distribution contours were generated.Results:When the reduction of the dorsal dislocation 2cm of distal radioulnar joint was performed by the intelligent airbag small splint,the airbag pad pressure adjusted to 16.5KPa,the range of bone tissue compressive stress in the distal radius was 2.7216?4.5911MPa,and the maximum compressive stress of local soft tissue was 132.95KPa;reduction of lateral dislocation 0.5cm of the distal radioulnar joint,the airbag pad pressure adjusted t0 16.5KPa,the range of bone tissue compressive stress in the distal radius was 5.2826?7.8944MPa,and the maximum compressive stress of local soft tissue was 150.27KPa.As soft tissue of the wrist was thin,using intelligent airbag small splint for the treatment of dislocation of distal radioulnar joint,the stress on the wrist under 100N maximum physiological axial load was significantly larger compared with other parts,and the compressive stress was mainly concentrated on the wrist joint.Conclusions:Through the related finite element study on the treatment of lateral and dorsal dislocation of distal radioulnar joint with intelligent airbag small splint,founding that the use of intelligent airbag small splint can correct the dislocation of distal radioulnar joint and without fixed failure,skin ulcer and other disadvantages,which can provide some reference for clinical work.