Use of a vertebra digital model for an implant design

Abstract

Abstract In this paper, we consider some possible design options for the reconstruction of an injured vertebra based on the local information on its surface before the injury. We used the methods of guaranteed identification for the reconstruction of the vertebra surface. Using the vertebra surface model, we have developed designs of anatomically shaped vertebra implants. In this case, the vertebral implant has a foramen vertebrale. Therefore, we have designed a split-type implant. To ensure the stiffness of the implant assembly, we have considered two fastening options for implant structural components: the dovetail groove mounting and fastening with asymmetric surfaces. Taking into account the existing best practices in medicine and in order to fasten implant structural components, we have selected options for connecting the components by means of asymmetric surfaces and with fasteners. In our opinion, the considered fastening options for vertebral implant components can be used in the replacement of other bones. When designing an atomically shaped vertebral implant, we selected a structure that weighed as close to a natural vertebra as possible. We also designed the structure to maximize its load-carrying capacity. We suggest to produce implants from blocks of allogenic osteoplastic material. This will enable implant components to be set properly and not to be rejected by the immune system.