Jun Young Lim1, Namhyun Kim2, Jong-Chul Park2, Sun K Yoo2, Dong Ah Shin3, Kyu-Won Shim4. 1. Department of Biomedical Engineering, The Graduate School, Yonsei University, Seoul, South Korea. 2. Department of Medical Engineering, College of Medicine, Yonsei University, Seoul, South Korea. 3. Department of Neurosurgery, Spine and Spinal Cord Institute, College of Medicine, Yonsei University, Seoul, South Korea. 4. Department of Pediatric Neurosurgery, Severance Children's Hospital, College of Medicine, Yonsei University, Seoul, South Korea. shimkyuwon@yuhs.ac.
Abstract
PURPOSE: Cranioplasty for recovering skull defects carries the risk for a number of complications. Various materials are used, including autologous bone graft, metallic materials, and non-metallic materials, each of which has advantages and disadvantages. If the use of autologous bone is not feasible, those artificial materials also have constraints in the case of complex anatomy and/or irregular defects. MATERIAL AND METHODS: This study used metal 3D-printing technology to overcome these existing drawbacks and analyze the clinical and mechanical performance requirements. To find an optimal structure that satisfied the structural and mechanical stability requirements, we evaluated biomechanical stability using finite element analysis (FEA) and mechanical testing. To ensure clinical applicability, the model was subjected to histological evaluation. Each specimen was implanted in the femur of a rabbit and was evaluated using histological measurements and push-out test. RESULTS AND CONCLUSION: We believe that our data will provide the basis for future applications of a variety of unit structures and further clinical trials and research, as well as the direction for the study of other patient-specific implants.
PURPOSE: Cranioplasty for recovering skull defects carries the risk for a number of complications. Various materials are used, including autologous bone graft, metallic materials, and non-metallic materials, each of which has advantages and disadvantages. If the use of autologous bone is not feasible, those artificial materials also have constraints in the case of complex anatomy and/or irregular defects. MATERIAL AND METHODS: This study used metal 3D-printing technology to overcome these existing drawbacks and analyze the clinical and mechanical performance requirements. To find an optimal structure that satisfied the structural and mechanical stability requirements, we evaluated biomechanical stability using finite element analysis (FEA) and mechanical testing. To ensure clinical applicability, the model was subjected to histological evaluation. Each specimen was implanted in the femur of a rabbit and was evaluated using histological measurements and push-out test. RESULTS AND CONCLUSION: We believe that our data will provide the basis for future applications of a variety of unit structures and further clinical trials and research, as well as the direction for the study of other patient-specific implants.
Authors: L E Murr; S M Gaytan; F Medina; H Lopez; E Martinez; B I Machado; D H Hernandez; L Martinez; M I Lopez; R B Wicker; J Bracke Journal: Philos Trans A Math Phys Eng Sci Date: 2010-04-28 Impact factor: 4.226
Authors: André Luiz Jardini; Maria Aparecida Larosa; Rubens Maciel Filho; Cecília Amélia de Carvalho Zavaglia; Luis Fernando Bernardes; Carlos Salles Lambert; Davi Reis Calderoni; Paulo Kharmandayan Journal: J Craniomaxillofac Surg Date: 2014-08-06 Impact factor: 2.078