Biomechanical and Biological Properties of Stereolithography-Based 3D-Printed Zirconia Interference Screws for Anterior Cruciate Ligament Reconstruction  

作　　者：Hui Li Yue Hu Xiaopeng Tang Yun Zhao Mei Li Yixuan Zhao Hao Luo Qingguo Lai Hongyu Xing 

机构地区：[1]Center of Stomatological,The Second Hospital of Shandong University,Jinan,250033,China [2]Research Center of 3D Printing in Stomatology of Shandong University,Jinan,250033,China [3]School of Mechanical and Electronic Engineering,Shandong Jianzhu University,Jinan,250101,China

出　　处：《Additive Manufacturing Frontiers》2024年第3期87-99,共13页增材制造前沿(英文)

基　　金：supported by National Key Research and Development Program of China(Grant No.2022YFB4601400);Major Basic Research Projects of Shandong Province of China(Grant No.ZR2023ZD24).

摘　　要：For effective anterior cruciate ligament(ACL)reconstruction,an interference screw(IFS)is employed to force transplantation of the ligament into the bone tunnel.In this study,IFSs were successfully designed and pre-pared,and the top tooth width,thread depth,and drive structure were parameterized with a forming accuracy of 80.0±21.1μm using SLA-3D printing technology.To improve the initial stability of ACL reconstruction,a biomechanical model was established,and the results were optimized through insertion torque and tensile test-ing.Consequently,the IFS with the top tooth width of 0.4 mm,thread depth of 0.8 mm,and hexagon drive,matching with theΦ8 mm bone tunnel,exhibits the best mechanical properties(maximum insertion torque of 1.064±0.117 N m,ultimate load of 446.126±37.632 N,stiffness of 66.33±27.48 N/mm).Additionally,the ZrO_(2)/PDA/RGD/Zn^(2+)bioactive coating was found to significantly improve the surface bioactivity of zirconia IFS.In conclusion,this study has significant implications for ACL reconstruction.

关 键 词：3D printing ZIRCONIA Interference screw BIOMECHANICS Bioactive coating 

分 类 号：R68[医药卫生—骨科学]