Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis
Abstract Background The modularity in total hip arthroplasty (THA) allows orthopaedic surgeons for an exact reconstruction of hip biomechanical parameters especially in revision and tumor arthroplasty. Modular structured femoral stems using taper junctions showed increased implant breakage in the re...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2018-01-01
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| Series: | Patient Safety in Surgery |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13037-017-0148-7 |
| _version_ | 1819034568573845504 |
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| author | Ronny Grunert Stefan Schleifenbaum Robert Möbius Michael Kopper Christian Rotsch Welf-Guntram Drossel Niels Hammer Torsten Prietzel |
| author_facet | Ronny Grunert Stefan Schleifenbaum Robert Möbius Michael Kopper Christian Rotsch Welf-Guntram Drossel Niels Hammer Torsten Prietzel |
| author_sort | Ronny Grunert |
| collection | DOAJ |
| description | Abstract Background The modularity in total hip arthroplasty (THA) allows orthopaedic surgeons for an exact reconstruction of hip biomechanical parameters especially in revision and tumor arthroplasty. Modular structured femoral stems using taper junctions showed increased implant breakage in the recent past. Presentation of the hypothesis We hypothesize that a novel modular stem-neck-interface leads to less implant breakage compared to conventional femoral stems. Testing of the hypothesis For this purpose, a novel modular femoral stem for THA was to design and manufacture. Therefore, three different variants of interface mechanisms were developed that enable a simple connection between the stem and the neck modules and allow for intra-operatively adjustment. Three prototypes A, B and C were manufactured and subsequently dynamic fatigue (ISO 7206–6) and body donor tested. Implication of the hypothesis Modularity in THA is mainly applied in THA as well as in revision and tumor arthroplasty. Modular implants are barely used because of the high risk of breakage. Another risks in this context are taper fretting, corrosion and disconnection. With the novel design, it should be possible to detach the stem and neck module intra-operatively to adapt the anatomical situation. The novel coupling mechanism of the rotating interface seems to be the most suitable for a secure stem-neck connection and is characterized by good intraoperative handling. |
| first_indexed | 2024-12-21T07:35:48Z |
| format | Article |
| id | doaj.art-eccdbaee00fc46ee9393905d35d98d66 |
| institution | Directory Open Access Journal |
| issn | 1754-9493 |
| language | English |
| last_indexed | 2024-12-21T07:35:48Z |
| publishDate | 2018-01-01 |
| publisher | BMC |
| record_format | Article |
| series | Patient Safety in Surgery |
| spelling | doaj.art-eccdbaee00fc46ee9393905d35d98d662022-12-21T19:11:27ZengBMCPatient Safety in Surgery1754-94932018-01-011211510.1186/s13037-017-0148-7Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesisRonny Grunert0Stefan Schleifenbaum1Robert Möbius2Michael Kopper3Christian Rotsch4Welf-Guntram Drossel5Niels Hammer6Torsten Prietzel7Department of Orthopedic, Trauma and Plastic Surgery, University Hospital LeipzigDepartment of Orthopedic, Trauma and Plastic Surgery, University Hospital LeipzigZESBO – Zentrum zur Erforschung der Stuetz- und BewegungsorganeFTZ e.V. Westsächsische Hochschule ZwickauFraunhofer institute for machine tools and forming technologyFraunhofer institute for machine tools and forming technologyDepartment of Anatomy, University of OtagoDepartment of Orthopedic and Trauma Surgery, HELIOS Clinic BlankenhainAbstract Background The modularity in total hip arthroplasty (THA) allows orthopaedic surgeons for an exact reconstruction of hip biomechanical parameters especially in revision and tumor arthroplasty. Modular structured femoral stems using taper junctions showed increased implant breakage in the recent past. Presentation of the hypothesis We hypothesize that a novel modular stem-neck-interface leads to less implant breakage compared to conventional femoral stems. Testing of the hypothesis For this purpose, a novel modular femoral stem for THA was to design and manufacture. Therefore, three different variants of interface mechanisms were developed that enable a simple connection between the stem and the neck modules and allow for intra-operatively adjustment. Three prototypes A, B and C were manufactured and subsequently dynamic fatigue (ISO 7206–6) and body donor tested. Implication of the hypothesis Modularity in THA is mainly applied in THA as well as in revision and tumor arthroplasty. Modular implants are barely used because of the high risk of breakage. Another risks in this context are taper fretting, corrosion and disconnection. With the novel design, it should be possible to detach the stem and neck module intra-operatively to adapt the anatomical situation. The novel coupling mechanism of the rotating interface seems to be the most suitable for a secure stem-neck connection and is characterized by good intraoperative handling.http://link.springer.com/article/10.1186/s13037-017-0148-7THAModular femoral stemTaper junctionNeck-stem interface |
| spellingShingle | Ronny Grunert Stefan Schleifenbaum Robert Möbius Michael Kopper Christian Rotsch Welf-Guntram Drossel Niels Hammer Torsten Prietzel Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis Patient Safety in Surgery THA Modular femoral stem Taper junction Neck-stem interface |
| title | Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis |
| title_full | Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis |
| title_fullStr | Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis |
| title_full_unstemmed | Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis |
| title_short | Novel concept of a modular hip implant could contribute to less implant failure in THA: a hypothesis |
| title_sort | novel concept of a modular hip implant could contribute to less implant failure in tha a hypothesis |
| topic | THA Modular femoral stem Taper junction Neck-stem interface |
| url | http://link.springer.com/article/10.1186/s13037-017-0148-7 |
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