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Stress-strain analysis of the femoral component of ZIREMA total hip endoprosthesis

Žitňanský M., Rehák L'., Naď M., Ďuriš R.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 43, nr 1

379--384

EN

Purpose: The results of the research project, which relates to the original design for total hip joint replacement, are presented in this paper. Solution of this project was recommended and supported by the Government Office of the Slovak Republic. Design/methodology/approach: Research methodology of total hip joint replacement has focused on a comprehensive analysis of this type of implants, which are implanted into patients around the world. Based on this knowledge and experiences of many years of leading Slovak orthopedists as well as experts in the field of material engineering such analysis was carried out in this study to and test a new type of femoral component. Findings: The result of the project was the design and implementation of original new type of hip replacement. Research limitations/implications: The new type of femoral component was experimentally tested in prestigious laboratories and is ready for clinical application in patients.Practical implications: After the completion the entire research and development it will be available for use in the SR situation. Originality/value: Product of research and development is an original Slovak cementless hip joint replacement coxal pull-up marked as ZIREMA.

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Metamorphosis quality preparing of alloy Ti64 in laboratory conditions

Žitňanský M., Čaplovič L., Demian S.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 20, nr 1-2

567-570

EN

Purpose: The aim of our research was the developing of the method for preparing titanium alloy (Ti64 ELI) by remold in laboratory conditions on our research workplace. As a reason for writting the paper is to inform the technical society. Design/methodology/approach: The objectives were achieved by using differently sources heating of remolded titanium alloy Ti64 ELI, by using of differently conditions by vacuum melting and pouring in to ceramics or copper moulds. As main method used for our research was remolding, purification, casting in the vacuum and then special heat treating by HIP processes. The quality of microstructure was investigated by electron microscopy and tested by Charpy impact test. The mean aim was to get microcastings of very intricate shapes and with very high quality of casting material. Through application four differently conditions of remolding we have found that in our workplace we have good ability to prepare the microcastings with very good quality, which is the main conclusion. Findings: For expectation it is possible by using such a process for production special microcastings from Ti64 ELI alloy. The mean idea of this paper will have practical implications. Research limitations/implications: In this time as a limitation is a little small capacity of plasma burner. Practical implications: The result of this paper should be made some changes in practice e.g. as savings of turning and lastly the using of Rapid Prototyping method. Originality/value: The original value of our paper is the testimony above quality of alloy Ti64 ELI as cast. The quality of alloy Ti64 ELI as cast is comparable with certified Ti64 ELI from abroad. The reach a destination of outcome in our laboratory conditions is a perspective method for production of microcastings from alloy Ti64.

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Investigation and implantation of endoprosthesis in biological experiment on animals

Žitňanský M., Čaplovič L'., Rehák L'., Makai F.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 24, nr 1

146-152

EN

Purpose: Purpose of this paper is to inform professional public about our research activities and results in the area of development of implants. Design/methodology/approach: Method used in the present study, was the computer design of 3D virtual model, rapid milling, rapid turning and special testing, to produce a new total endo-prosthesis for dogs. Findings: Results of these activities are eight complete total endo-prostheses for dog implantation and for test preparing in vitro and in vivo and finally, for biological experiments on animals - dogs. Research limitations/implications: This paper is the result of partly primary and partly applied research. The achieved results will be used for preparing of the total endo-prostheses into the human skeleton.