23 Jul 3D printing mechanics bionic bone reconstruction body based on crack bridging toughening mechanism and preparation method thereof
Abstract
The invention discloses a 3D printing mechanics bionic bone reconstruction body based on a crack bridging toughening mechanism and a preparation method thereof. In recent years, researches by a scanning electron microscopy (SEM), X-ray emission computed tomography and other technologies find out that crack bridging is an important external toughening mechanism of cortical bones and dentin. Crack bridging comprises forming of a continuous region crossing cracks at a back trace of a crack tip and plays a role in crack opening resistance. A conventional reconstruction body has a problem of poor mechanical strength and has no mechanical property matched with natural bones, through being inspired by the mechanism of crack toughening when natural bones are destroyed, the biomaterial bionic natural bone crack bridging structure is used for constructing the bone tissue engineering reconstruction body by 3D printing, and the crack bridging structure of the reconstruction body under external force damage is represented by SEM under application of external force. The mechanics bionic reconstruction body having the crack bridging structure is successfully prepared by material design. The compressive strength of the reconstruction body is as high as 11.2 MPa.
Year: 2019
Country: CN
Doc No: 110090322