Research, Educational and Other Activities at IMID

Transcription

1 Research, Educational and Other Activities at IMID Matúš Ranuša INSTITUTE OF MACHINE AND INDUSTRIAL DESIGN Faculty of Mechanical Engineering Brno University of Technology Brno, 4th April 2018

2 Contents Research Activities Introduction and Motivation Background Results Conclusion and Vision Educational Activities Events and IMID/BUT Activities 2/24

3 Introduction and motivation Total hip replacement Common and most successful surgeries 161 surgeries per population (OECD 2015) Limited longevity of implants (5-15 years) Surgeries/ 10 years 43,1% 44,9% 0,2% 0,7% 0,1% 3/24

4 Introduction and motivation Total hip replacement Common and most successful surgeries 161 surgeries per population (OECD 2015) Limited longevity of implants (5-15 years) Material Wear (mm 3 /year) UHMWPE - Kov 56 Cross linked UHMWPE - Kov 2,8 Kov - Kov 0,9 Keramika- Keramika 0,004 4/24

5 Introduction and motivation Metal - CoCr 9,8 % Polyethylene 72,1 % Ceramics 16 % Lubrication Friction Wear surgeries 5/24

6 Introduction and motivation Importance of wear analysis Lubrication Prediction of possible complications Friction Analysis of replacement failures Influence of position on replacement failures Wear Metrology Validation Application Usability 6/24

7 Background Reconstructed geometry Retrieved liner Metrology Validation Application Usability 7/24

8 Background Validation 3 new implants According ISO part 1 Gravimetric validation Wear 65 grams Diferences ± 4 miligrams Metrology Validation Application Usability 8/24

9 Results 16 retrieved implants Clinical data Scanning method Analysis of surface Martell s method 16 retrieved liners Metrology Validation Application Usability 9/24

10 Volumetric wear (mm 3 /year) Linear wear (mm/year) Results 0,4 0,3 0,2 0, retrieved liners Patient Metrology Validation Application Usability 10/24

11 Material properties Lubrication Friction Max load 3 kn 1Hz Flexion - extension ± 60 Rotation ± 10 Long term tests according ISO Wear Metrology Validation Application Usability 11/24

12 Material properties Lubrication Friction Wear Metrology Validation Application Usability 12/24

13 Friction coefficient Friction coefficient Roughness Ra Material properties 0,15 0,14 0,13 0,12 0,11 0,1 0,09 0,08 0,07 0,017 0,016 0,015 0,014 0,013 0,012 0,011 0,01 0, Cycles (x10 3 ) Cycles (x10 3 ) Lubrication Friction Wear Metrology Validation Application Usability 13/24

14 Chemical degradation Lubrication Friction Wear Metrology Validation Application Usability 14/24

15 Conclusions and Vision Conclusions Wear of liners depends mostly on: Inclination angle in pelvis Geometry of articulating surface Changes of surface structure Chemical degradation of surface Consequences: Particle loosening Delamination of surface Deformation of liner Revision surgeries Lubrication Friction Wear Visions Understanding of chemical changeses Modification of geometry Influence of particles in interaction with lubrication 15/24

16 Research identifiers CHOUDHURY, D.; RANUŠA, M.; FLEMING, R. A.; VRBKA, M.; KŘUPKA, I.; TEETER M. G.; GOSS, J.; ZOU, M. Mechanical Wear and Oxidative Degradation Analysis of Retrieved Ultra High Molecular Weight Polyethylene Acetabular Cups. Journal of the mechanical behavior of biomedical materials, 2018, roč. 79, č. 1, s ISSN: (IF 3,11 ; citation - 1 ) RANUŠA, M.; GALLO, J.; HOBZA, M.; VRBKA, M.; NEČAS, D.; HARTL, M. Opotřebení a drsnost artikulačního povrchu u extrahovaných polyetylénů jamky Bicon- Plus. Acta Chirurgie Orthopaedicae et Traumatologie Čechoslovaca, 2017, roč. 84, č. 3, s ISSN: (IF 0,56 ; citation - 2) RANUŠA, M.; GALLO, J.; VRBKA, M.; HOBZA, M.; PALOUŠEK, D.; KŘUPKA, I.; HARTL, M. Wear Analysis of Extracted Polyethylene Acetabular Cups Using a 3D Optical Scanner. TRIBOLOGY TRANSACTIONS, 2016, roč. 60, č. 3, s ISSN: (IF 1,69 ; citation - 3) RANUŠA, M.; ZEMAN, J.; GALLO, J.; VRBKA, M.; KŘUPKA, I.; HARTL,M. Experimental Determination of Effects of the Polyethylene Acetabular Positioning on the Run-in Phase of Wear and on the Surface Deformation. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B, APPLIED BIOMATERIALS. (In progress, April 2018) 16/24

17 Other activities Conferences Frejks days 2015 ( June, 25-26, Brno, Česká republika) HOBZA, M.; RANUSA, M. Valuation of Type and Wear of Retrieved Polyethylene Bicon Cups. NORDTRIB 2016 ( July, 14-17, Hämeenlinna, Fínsko) RANUSA, M.; VRBKA, M.; KŘUPKA, I.; HARTL, M. Development and Validation of an Optical Scanning Method for Volumetric Wear Analysis WTC 2017 ( September, 17 22, Beijing, China) RANUSA, M.; VRBKA, M.; GALLO, J.; KŘUPKA, I.; HARTL, M. Influence of Acetabular Cup Inclination on Wear of UHMWPE Liners. Cooperation Waterloo University, Canada, Ontario (prof. John B. Medley) internship, June, 6, 2016 August 27, 2016 Anglian Ruskin University, England, Chelmsford (Rajshree Hillstrom, PhD MBA) Arkansas University, USA, Arkansas (Dr. Dipankar Choudhury) 17/24

18 Educational activities ZKP Team Project ZIP Team Project ZTR Tribology 6KT Machine Design 0ZP Aventisc Pneumobil Racing Team Diploma theses supervision: Bc. Jakub Zeman (5r) Experimental Determination of Effects of the Polyethylene Acetabular Positioning on the Run-in Phase of Wear and on the Surface Deformation. Bc. Samuel Seidl (4r) Behavior of Polyethylene Particles in Contact Surfaces of Hip Joint Replacements 18/24

19 Pneumobil Mission: Learning by doing Mentoring Students working in a team Promotion of BUT Vision: Interfaculty cooperation Team structure Win competitions 19/24

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22 Thank you.