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  4. Vibratory insertion of press-fit acetabular components requires less force than a single blow technique
 
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Vibratory insertion of press-fit acetabular components requires less force than a single blow technique

Citation Link: https://doi.org/10.15480/882.13157
Publikationstyp
Journal Article
Date Issued
2024-06-01
Sprache
English
Author(s)
Niki, Yasaman  
Biomechanik M-3  
Huber, Gerd  
Biomechanik M-3  
Behzadi, Kambiz
Morlock, Michael  
Biomechanik M-3  
TORE-DOI
10.15480/882.13157
TORE-URI
https://hdl.handle.net/11420/48442
Journal
Bone & joint research  
Volume
13
Issue
6
Start Page
272
End Page
278
Citation
Bone and Joint Research 13 (6): 272-278 (2024)
Publisher DOI
10.1302/2046-3758.136.BJR-2023-0263.R1
Scopus ID
2-s2.0-85197389306
Publisher
British Editorial Soc. of Bone & Joint Surgery
Aims Periprosthetic fracture and implant loosening are two of the major reasons for revision surgery of cementless implants. Optimal implant fixation with minimal bone damage is challenging in this procedure. This pilot study investigates whether vibratory implant insertion is gentler compared to consecutive single blows for acetabular component implantation in a surrogate polyurethane (PU) model. Methods Acetabular components (cups) were implanted into 1 mm nominal under-sized cavities in PU foams (15 and 30 per cubic foot (PCF)) using a vibratory implant insertion device and an automated impaction device for single blows. The impaction force, remaining polar gap, and lever-out moment were measured and compared between the impaction methods. Results Impaction force was reduced by 89% and 53% for vibratory insertion in 15 and 30 PCF foams, respectively. Both methods positioned the component with polar gaps under 2 mm in 15 PCF foam. However, in 30 PCF foam, the vibratory insertion resulted in a clinically undesirable polar gap of over 2 mm. A higher lever-out moment was achieved with the consecutive single blow insertion by 42% in 15 PCF and 2.7 times higher in 30 PCF foam. Conclusion Vibratory implant insertion may lower periprosthetic fracture risk by reducing impaction forces, particularly in low-quality bone. Achieving implant seating using vibratory insertion requires adjustment of the nominal press-fit, especially in denser bone. Further preclinical testing on real bone tissue is necessary to assess whether its viscoelasticity in combination with an adjusted press-fit can compensate for the reduced primary stability after vibratory insertion observed in this study.
DDC Class
610: Medicine, Health
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
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