Int J Med Sci
2009; 6(5):280-286.
doi:10.7150/ijms.6.280 This issueCite
Research Paper
Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs
T. Thielen1 ✉, S. Maas1, A. Zuerbes1, D. Waldmann1, K. Anagnostakos2, J. Kelm2, 3
1. Research Unit in Engineering Sciences, University of Luxembourg, Luxembourg 2. Klinik für Orthopädie und Orthopädische Chirurgie, Universitätsklinikum des Saarlandes, Homburg / Saar, Germany 3. Chirurgisch-Orthopädisches Zentrum, Illingen / Saar, Germany
✉ Correspondence to: Dipl.-Ing. (MSc) Thomas Thielen, Université du Luxembourg, Faculté des Sciences, de la Technique et de la Communication, 6, rue Richard Coudenhove-Kalergi, L-1359 Luxembourg-Kirchberg. Phone: (+352) 46 66 44 5422; Fax: (+352) 46 66 44 5620; Thomas.ThielenluMore
Citation:
Thielen T, Maas S, Zuerbes A, Waldmann D, Anagnostakos K, Kelm J. Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs. Int J Med Sci 2009; 6(5):280-286. doi:10.7150/ijms.6.280. https://www.medsci.org/v06p0280.htm
Two-stage reconstruction using an antibiotic loaded cement spacer is the preferred treatment method of late hip joint infections. Hip spacers maintain stability of the joint and length of the limb during treatment period. However, as the material strength of bone cement (PMMA) is limited, spacer fractures led to serious complications in the past. This study investigated the load capacity of custom made hip spacers, developed at the 'Klinik für Orthopädie und Orthopädische Chirurgie' (Universitätsklinikum des Saarlandes, Homburg / Saar, Germany), and implanted into composite femurs. In a quasi-static test, non-reinforced spacers tolerated hip joint loads of about 3000 N, whereas reinforced spacers with titanium-grade-two endoskeletons doubled this load up to 6000 N. Even for cyclic loading, endoskeleton-including hip spacers tolerated loads of >4500 N with 500,000 load cycles. Thus, an endoskeleton-including spacer should provide a mobile and functional joint through the treatment course. A generated FE-model was used to determine the fracture stresses and allows for further sensitivity analysis.
Keywords: Spacer, Fracture, Infection, Bone cement, Endoskeleton
Citation styles
APA
Thielen, T., Maas, S., Zuerbes, A., Waldmann, D., Anagnostakos, K., Kelm, J. (2009). Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs. International Journal of Medical Sciences, 6(5), 280-286. https://doi.org/10.7150/ijms.6.280.
ACS
Thielen, T.; Maas, S.; Zuerbes, A.; Waldmann, D.; Anagnostakos, K.; Kelm, J. Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs. Int. J. Med. Sci. 2009, 6 (5), 280-286. DOI: 10.7150/ijms.6.280.
NLM
Thielen T, Maas S, Zuerbes A, Waldmann D, Anagnostakos K, Kelm J. Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs. Int J Med Sci 2009; 6(5):280-286. doi:10.7150/ijms.6.280. https://www.medsci.org/v06p0280.htm
CSE
Thielen T, Maas S, Zuerbes A, Waldmann D, Anagnostakos K, Kelm J. 2009. Mechanical behaviour of standardized, endoskeleton-including hip spacers implanted into composite femurs. Int J Med Sci. 6(5):280-286.