In order to address the mechanical problems related to the process of closed reduction and external fixation of distal radius fractures,biomechanical analyses of the components of the splint taping external fixation process were carried out,and the mechanical value of the splint taping fixation of the straightened distal radius fracture was investigated by using the software Workbench.The effect of splint fixation on the forearm of distal radius fracture was investigated by obtaining the forearm model data from CT images,converting the image data into a 3D model using mimics and applying Geomagic for noise reduction and smoothing,and combining the various components of the model by simulating the actual process of splinting and tying in UG.The results showed that the splint had sufficient fixation force on the ulna and radius to ensure the stability of the tissue.The maximum deformation position of the model was 1.144 6×10-4 mm at the front end of the dorsal splint near the side of the radius.The maximum stress and strain of the ulna and radius occurred at the fracture site after fixation of the distal radius fracture.The maximum stress was 0.129 6 MPa,the maximum strain was 9.892 5×10-6 mm/mm,and the maximum stress of the fracture end surface was 2.207 1×10-2 MPa.In the pressure pad,the stress was maximum at the contact between the lateral pressure pad and the binding band,and the stress was maximum at the contact between the medial pressure pad and the soft tissue.The maximum stress was found in the middle of the radial side of the splint.The fracture end deviated from the radial side to the ulnar side.
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