Design and Optimization Lattice Endoprosthesis for Long Bones: Manufacturing and Clinical Experiment

• Main Authors: Pavel Bolshakov, Ivan Raginov, Vladislav Egorov, Regina Kashapova, Ramil Kashapov, Tatyana Baltina, Oskar Sachenkov
• Format: Article
• Language: English
• Published: MDPI AG 2020-03-01
• Series: Materials
• Subjects: lattice endoprosthesis; long bone; additive manufacturing
• Online Access: https://www.mdpi.com/1996-1944/13/5/1185

The article is devoted to the construction of lattice endoprosthesis for a long bone. Clinically, the main idea is to design a construction with the ability to improve bone growth. The article presents the algorithm for such a design. The construction should be produced by additive manufacturing. Such an approach allows using not only metallic materials but also ceramics and polymers. The algorithm is based on the influence function as a method to describe the elementary cell geometry. The elementary cell can be described by a number of parameters. The influence function maps the parameters to local stress in construction. Changing the parameters influences the stress distribution in the endoprosthesis. In the paper, a bipyramid was used as an elementary cell. Numerical studies were performed using the finite element method. As a result, manufacturing construction is described. Some problems for different orientations of growth are given. The clinical test was done and histological results were presented.