title: New lumbar disc endoprosthesis applied to the patient's anatomic features.
abstract: OBJECTIVE
  The paper describes the process of designing, manufacturing and design verification of the intervertebral of a new structure of lumbar disc endoprosthesis - INOP/LSP.1101.
  
  
  METHODS
  Modern and noninvasive medical imagining techniques, make it possible to record results of tests in a digital form, which creates opportunities for further processing. Mimics Innovation Suite software generates three-dimensional virtual models reflecting the real shape and measurements of components of L4-L5 spinal motion segment. With the use of 3D Print technique, physical models of bone structures of the mobile segment of the spine as well as the INOP/LSP.1101 endoprosthesis model were generated. A simplified FEA analysis of stresses in the endoprosthesis was performed to evaluate the designed geometries and materials of the new structure.
  
  
  RESULTS
  The endoprosthesis prototype was made of Co28Cr6Mo alloy with the use of selective laser technology. The prototypes were subject to tribological verification with the use of the SBT-03.1 spine simulator.
  
  
  CONCLUSIONS
  The structure of the endoprosthesis ensures a full reflection of its kinematics, full range of mobility of the motion segment in all anatomical planes as well as restoration of a normal height of the intervertebral space and curvature of the lordosis. The results of the tribological tests confirmed that SLM technology has the potential for production of the human bone and jointendoprostheses.
authors.affiliation: Metal Forming Institute, Poznań, Poland.
authors.forename: Adrian
authors.initials: A
authors.lastname: Mróz
authors.affiliation: Warsaw University of Technology, Institute of Precision Mechanics, Warsaw, Poland.
authors.forename: Konstanty
authors.initials: K
authors.lastname: Skalski
authors.affiliation: Metal Forming Institute, Poznań, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Walczyk
mesh_terms: D019245:Compressive Strength; D003198:Computer Simulation; D017076:Computer-Aided Design; D019544:Equipment Failure Analysis; D006801:Humans; D008159:Lumbar Vertebrae / Q000033:anatomy & histology*; D008953:Models, Anatomic; D008954:Models, Biological; D066330:Printing, Three-Dimensional; D011474:Prosthesis Design / Q000379:methods; D017755:Prosthesis Fitting / Q000379:methods*; D013314:Stress, Mechanical; D013718:Tensile Strength; D059145:Total Disc Replacement