Biomechanics of a cemented short stem: a comparative in vitro study regarding primary stability and maximum fracture load
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Published:2021-03-23
Issue:10
Volume:141
Page:1797-1806
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ISSN:0936-8051
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Container-title:Archives of Orthopaedic and Trauma Surgery
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language:en
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Short-container-title:Arch Orthop Trauma Surg
Author:
Freitag Tobias,Kutzner Karl Philipp,Bieger Ralf,Reichel Heiko,Ignatius Anita,Dürselen Lutz
Abstract
Abstract
Purpose
In total hip arthroplasty, uncemented short stems have been used more and more frequently in recent years. Especially for short and curved femoral implants, bone-preserving and soft tissue-sparing properties are postulated. However, indication is limited to sufficient bone quality. At present, there are no curved short stems available which are based on cemented fixation.
Methods
In this in vitro study, primary stability and maximum fracture load of a newly developed cemented short-stem implant was evaluated in comparison to an already well-established cemented conventional straight stem using six pairs of human cadaver femurs with minor bone quality. Primary stability, including reversible micromotion and irreversible migration, was assessed in a dynamic material-testing machine. Furthermore, a subsequent load-to-failure test revealed the periprosthetic fracture characteristics.
Results
Reversible and irreversible micromotions showed no statistical difference between the two investigated stems. All short stems fractured under maximum load according to Vancouver type B3, whereas 4 out of 6 conventional stems suffered a periprosthetic fracture according to Vancouver type C. Mean fracture load of the short stems was 3062 N versus 3160 N for the conventional stems (p = 0.84).
Conclusion
Primary stability of the cemented short stem was not negatively influenced compared to the cemented conventional stem and no significant difference in fracture load was observed. However, a clear difference in the fracture pattern has been identified.
Funder
RKU - Universitäts- und Rehabilitationskliniken Ulm gGmbH
Publisher
Springer Science and Business Media LLC
Subject
Orthopedics and Sports Medicine,General Medicine,Surgery,Surgery
Reference48 articles.
1. Knight SR, Aujla R, Biswas SP (2011) Total hip arthroplasty—over 100 years of operative history. Orthop Rev (Pavia) 3:e16. https://doi.org/10.4081/or.2011.e16
2. The Swedish hip arthroplasty register annual report 2017. https://registercentrum.blob.core.windows.net/shpr/r/Eng_Arsrapport_2017_Hoftprotes_final-Syx2fJPhMN.pdf. Accessed 13 Mar 2021
3. The Norwegian arthroplasty register annual report 2018. http://nrlweb.ihelse.net/eng/Rapporter/Report2018_english.pdf. Accessed 13 Mar 2021
4. National Joint Registry (NJR) for England, Wales, Northern Ireland and the Isle of Man 2018 Annual Report. https://www.hqip.org.uk/wp-content/uploads/2018/11/NJR-15th-Annual-Report-2018.pdf. Accessed 13 Mar 2021
5. Australian Orthopaedic Association National Joint Registry annual report 2018. https://aoanjrr.sahmri.com/documents/10180/576950/Hip%2C%20Knee%20%26%20Shoulder%20Arthroplasty. Accessed 13 Mar 2021
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