Development process and manufactu-ring of modern medical implants with LENS technology

• Autorzy: Balazic M. , Recek D. , Kramar D. , Milfelner M. , Kopac J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Research and development of modern medical implants is complex and demanding process focused on fulfilling requirements regarding materials, machining technologies and functionality. Typical example of modern medical implant is elbow nail for fixation of Caput radii fractures. It could be manufactured with classical machining technologies and with advanced Rapid Prototyping technologies such as highly targeted metal deposition technology LENS (Laser Engineered Net Shaping). Design/methodology/approach: Development of modern medical implants is a multi-stage design and manufacturing process primarily based on computer aided design (CAD), computer simulations, machinability of certificated biomaterials, in-vitro biofunctionality and in-vivo tests. Findings: LENS technology enables rapid and agile manufacturing, improved design flexibility, repair and re-manufacture. Material built with LENS technology has equal or even better mechanical and material properties. In medical application LENS technology enables development and rapid prototyping of special surgical instruments, trauma and orthopaedic high-performance implants which are hollow and thin walled. Research limitations/implications: To confirm assumption regarding better material and mechanical properties of products made with LENS technology additional static, dynamic (the High-Cycle-Fatigue test) and material (porosity and microstructure) tests will be carried out in the near future. Practical implications: Three different designs of bone fixation nail prototype made of titanium alloy had been manufactured with conventional machining techniques where some disadvantages due to the technology had been identified. To solve those problems LENS technology had been applied. As fourth design hollow thin walled fixation bone nail prototype made of titanium alloy powder (grain size 45 micrometers) had been manufactured and tested. Originality/value: Paper presents case study where LENS technology is being applied to manufacture modern medical implants. Particular focus of the paper is on material quality and quality benefits obtained in current and future medical application.

Słowa kluczowe

EN

LENS technology; rapid prototyping; modern medical implants; titanium alloy; elbow bone fixation nail

PL

technologia LENS; szybkie wykonywanie prototypów; nowoczesne implanty medyczne; stop tytanu; gwóźdż mocujący łokciowy

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 32, nr 1
• Strony: 46--52
• Opis fizyczny: Bibliogr. 9 poz., rys., tabl.

Twórcy

autor

Balazic M.

autor

Recek D.

autor

Kramar D.

autor

Milfelner M.

autor

Kopac J.

• Department of Machining Technology Management, Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, SI-1000 Ljubljana, Slovenia,

Bibliografia

• [1] M. Griffith, P. L. Rangaswamy, M. B. Prime, T. M. Holden, R. B. Rogge, J. M. Edwards, R. J. Sebring, Residual stresses in LENS components using neutron diffraction and contour method, Materials Science and Engineering A 399 (2005) 72-83.
• [2] R. Grylls, LENS Process White Paper: Fatigue Testing of LENS Ti-6-4, 2005.
• [3] D. A. Hollander, M. von Walter, T. Wirtz, R. Sellei, B. S. Rohlfing, O. Paar, H. J. Erli, Structural, mechanical and in vitro characterization of individually structured Ti–6Al–4V produced by direct laser forming, Biomaterials 27 (2006) 955-963.
• [4] F. Klocke, Manufacturing Technology I, WZL-RWTH, Aachen, 2001.
• [5] G. K. Lewis, E. Schlienger, Practical considerations and capabilities for laser assisted direct metal deposition, Materials and Design 21 (2000) 417-423.
• [6] L. N. López de Lacalle, A. Lamikiz, A. Celaya, Simulation of plasma assisted milling of heat resistant alloys, International Journal of Simulation Modelling 1/1 (2002) 5-15.
• [7] Optomec company, http://www.optomec.com.
• [8] P. Tengvall, I. Lundstrom, Physico-chemical considerations of titanium as a biomaterial, Clinical Materials 9 (1992) 115-134.
• [9] F. Wataria, A. Yokoyamaa, M. Omorib, T. Hiraic, H. Kondoa, M. Uoa, T. Kawasakia, Biocompatibility of materials and development to functionally graded implant for bio-medical application, Composites Science and Technology 64 (2004) 893-908.