Improvements of medical implants based on modern materials and new technologies

• Autorzy: Balazic M. , Kopac J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Modern medical implants are products with pretentious requirements regarding materials, machining technologies and their functionality. In general they are divided into two main groups which are permanent and temporary medical implants. To improve implant's performance in the working environment one of the main goals of research and development process is to improve implant's biofunctionality, biocompatibility, corrosion resistance, bioadhesion, processability and availability. Design/methodology/approach: Development of modern medical implants is a multi-stage design and manufacturing process primarily based on computer design, computer numerical simulations and in-vitro tests. Findings: Some improvements could be done with reverse engineering technology which generates a numerical model from the workpiece in order to get a replica or geometric variant for the scanned data. Practical implications: The surgical treatments of bone fractures (osteosynthesis) are divided into external fracture fixation or internal fracture fixation. One of the most common used medical implant for internal fracture fixation is bone fixation plate which holds together the bone fragments. In some cases the improved shape of the plate could results into better biofunctionality and bioadhesion. Originality/value: In this contribution few examples of machining technologies based on CAD-CAM principle, modern materials and research/development process of modern medical implants is presented.

Słowa kluczowe

EN

metallic alloys; metallic biomaterials; medical implant; shape memory material; rapid prototyping

PL

stopy metaliczne; biomateriały metaliczne; implant medyczny; materiały z pamięcią kształtu; szybkie wykonywanie prototypów

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 25, nr 2
• Strony: 31--34
• Opis fizyczny: Bibliogr. 13 poz., fot., rys.

Twórcy

autor

Balazic M.

autor

Kopac J.

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

Bibliografia

• [1] H.J. Rack. J.I. Qazi, Titanium alloys for biomedical applications. Materials Science and Engineering C 26 (2006) 1269.
• [2] P. Tengvall, I. Lundstrom, Physico-chemical considerations of titanium as a biomaterial, Clinical Materials 9 (1992) 115-134.
• [3] F. Klocke, Manufacturing Technology I, WZL-RWTH, Aachen, 2001.
• [4] K.deGroot, C.P.A.T. Klein, J.G.C. Wolke, J.M.A. de Blieck-Hogervorst, CRC Handbook of Bioactive Ceramics, CRC Press, Boston, 1990, 133-142.
• [5] M.M. Morshed, B.P. McNamara, D.C. Cameron, M.S.J. Hashmi, Stress and adhesion in DLC coatings on 316L stainless steel deposited by a neutral beam source, Journal of Materials Processing Technology 143 (2003) 922-926.
• [6] C. Yanli, L. Chunyong, Z. Shengli, C. Zhenduo, Y. Xianjin, Formation of bonelike apatite-collagen composite coating on the surface of NiTi shape memory alloy, Scripta Materialia 54 (2006) 89-92.
• [7] T.W. Duerig, D.E. Tolomeo, M. Wholey, An overview of superelastic stent design, Minimally Invasive Therapy & Allied Technologies 9 (2000) 235-246.
• [8] N.B. Morgan, Medical shape memory alloy applications the market and its products, Material Science and Engineering 378 (2004) 16-23.
• [9] T.W. Duerig, A. Pelton, D. Stoeckel, An overview of nitinol medical applications, Materials Science and Engineering 275 (1999) 149-160.
• [10] K. Weinert, V. Petzoldt, Machining of NiTi based shape memory alloys, Materials Science and Engineering 378 (2004) 180-184.
• [11] M. Buschka, Form technology - process organization with the milling and boring of NiTi - form alloys K. Weinert (OD.), Volcanic Publishing House, Essen, 2002.
• [12] B. Semolic, Strategy of technological development, Toolmakers cluster of Slovenia, Celje, 2004.
• [13] 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.