Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups
Hip implants have a modular structure which enables patient-specific adaptation but also revision of worn or damaged friction partners without compromising the implant-bone connection. To reduce complications during the extraction of ceramic inlays, this work presents a new approach of a shape-memor...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Bioengineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2306-5354/11/1/75 |
| _version_ | 1797344612253171712 |
|---|---|
| author | Christian Rotsch Karoline Kemter-Esser Johanna Dohndorf Marcel Knothe Welf-Guntram Drossel Christoph-Eckhard Heyde |
| author_facet | Christian Rotsch Karoline Kemter-Esser Johanna Dohndorf Marcel Knothe Welf-Guntram Drossel Christoph-Eckhard Heyde |
| author_sort | Christian Rotsch |
| collection | DOAJ |
| description | Hip implants have a modular structure which enables patient-specific adaptation but also revision of worn or damaged friction partners without compromising the implant-bone connection. To reduce complications during the extraction of ceramic inlays, this work presents a new approach of a shape-memory-alloy-actuator which enables the loosening of ceramic inlays from acetabular hip cups without ceramic chipping or damaging the metal cup. This technical in vitro study exam-ines two principles of heating currents and hot water for thermal activation of the shape-memory-alloy-actuator to generate a force between the metal cup and the ceramic inlay. Mechanical tests concerning push-in and push-out forces, deformation of the acetabular cup according to international test standards, and force generated by the actuator were generated to prove the feasibility of this new approach to ceramic inlay revision. The required disassembly force for a modular acetabular device achieved an average value of 602 N after static and 713 N after cyclic loading. The actuator can provide a push-out force up to 1951 N. In addition, it is shown that the necessary modifications to the implant modules for the implementation of the shape-memory-actuator-system do not result in any change in the mechanical properties compared to conventional systems. |
| first_indexed | 2024-03-08T11:05:14Z |
| format | Article |
| id | doaj.art-57185ea311c84fb3b34c9c9011fa847c |
| institution | Directory Open Access Journal |
| issn | 2306-5354 |
| language | English |
| last_indexed | 2024-03-08T11:05:14Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Bioengineering |
| spelling | doaj.art-57185ea311c84fb3b34c9c9011fa847c2024-01-26T15:06:24ZengMDPI AGBioengineering2306-53542024-01-011117510.3390/bioengineering11010075Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular CupsChristian Rotsch0Karoline Kemter-Esser1Johanna Dohndorf2Marcel Knothe3Welf-Guntram Drossel4Christoph-Eckhard Heyde5Fraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyIMA Materialforschung und Anwendungstechnik GmbH, 01099 Dresden, GermanyFraunhofer Institute for Machine Tools and Forming Technology IWU, 01187 Dresden, GermanyUniversity of Leipzig Medical Center, Orthopaedic, Trauma and Plastic Surgery Clinic, University of Leipzig, 04103 Leipzig, GermanyHip implants have a modular structure which enables patient-specific adaptation but also revision of worn or damaged friction partners without compromising the implant-bone connection. To reduce complications during the extraction of ceramic inlays, this work presents a new approach of a shape-memory-alloy-actuator which enables the loosening of ceramic inlays from acetabular hip cups without ceramic chipping or damaging the metal cup. This technical in vitro study exam-ines two principles of heating currents and hot water for thermal activation of the shape-memory-alloy-actuator to generate a force between the metal cup and the ceramic inlay. Mechanical tests concerning push-in and push-out forces, deformation of the acetabular cup according to international test standards, and force generated by the actuator were generated to prove the feasibility of this new approach to ceramic inlay revision. The required disassembly force for a modular acetabular device achieved an average value of 602 N after static and 713 N after cyclic loading. The actuator can provide a push-out force up to 1951 N. In addition, it is shown that the necessary modifications to the implant modules for the implementation of the shape-memory-actuator-system do not result in any change in the mechanical properties compared to conventional systems.https://www.mdpi.com/2306-5354/11/1/75shape memory alloyNitinolNiTiSMAimplanthip implant |
| spellingShingle | Christian Rotsch Karoline Kemter-Esser Johanna Dohndorf Marcel Knothe Welf-Guntram Drossel Christoph-Eckhard Heyde Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups Bioengineering shape memory alloy Nitinol NiTi SMA implant hip implant |
| title | Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups |
| title_full | Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups |
| title_fullStr | Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups |
| title_full_unstemmed | Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups |
| title_short | Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups |
| title_sort | feasibility of a shape memory alloy actuator system for modular acetabular cups |
| topic | shape memory alloy Nitinol NiTi SMA implant hip implant |
| url | https://www.mdpi.com/2306-5354/11/1/75 |
| work_keys_str_mv | AT christianrotsch feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups AT karolinekemteresser feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups AT johannadohndorf feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups AT marcelknothe feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups AT welfguntramdrossel feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups AT christopheckhardheyde feasibilityofashapememoryalloyactuatorsystemformodularacetabularcups |