Mechanical failure of a Thompson's hemiarthoplasty stem 28 years post-implantation: An investigation with electron microscopy

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Mechanical failure of a Thompson's hemiarthoplasty stem 28 years post-implantation: An investigation with electron microscopy (EN)

Kazakos, K (EN)
Kytopoulos, V (EN)
Maris, I (EN)
Economakis, A (EN)
Darmanis, S (EN)

journalArticle (EN)

2014-03-01T01:26:36Z
2007 (EN)


The authors would like to report a mechanical failure of a Thompson's prosthesis, 28 years post-implantation. A detailed examination of the specimen revealed no defects in the prosthesis and a dominating 'brittle component' fracture of the stem. In this context the detailed fractographic study by scanning electron microscopy (SEM) revealed no detrimental manufactural defects that may have produced microcracks and consequently risked initiating the fracture propagation. In contrast, the fracture was mainly a fatigue one with a mixed mode of microscopic trans- and intergranular crack propagation. To the best of our knowledge, such a mechanism of implant failure in a cementless stem has never before reached 28 years neither in a Thompson's nor any other type of prosthesis, and in the already reported case, it exceeded 30 years [N. Wolson and J. P. Waadell, Can. J. Surg. 38(6) (1995) 542], however the stem's ultrastructure has never been investigated under electron microscopy, which arguably can provide a useful assessment of a fatigue fracture. The authors introduce the question of revising our standards when evaluating the newly designed and expensive implants and propose re-focusing on surgical technique, rather than purely on implant properties. © 2007 Springer Science+Business Media, LLC. (EN)

Engineering, Biomedical (EN)
Materials Science, Biomaterials (EN)

Surgical techniques (EN)
Medical problems (EN)
Fracture Propagation (EN)
arthroplasty (EN)
Humans (EN)
case report (EN)
physical examination (EN)
Fracture propagation (EN)
Implant failure (EN)
Crack propagation (EN)
prosthesis failure (EN)
Mechanical failure (EN)
Prosthesis Failure (EN)
Crack Propagation (EN)
Failure analysis (EN)
Surgery (EN)
Surface Properties (EN)
Aged, 80 and over (EN)
Female (EN)
priority journal (EN)
female (EN)
human (EN)
Surgical Technique (EN)
scanning electron microscopy (EN)
Scanning electron microscopy (EN)
falling (EN)
Electron Microscopy (EN)
Microscopy, Electron, Scanning (EN)
anamnesis (EN)
hospitalization (EN)
femur (EN)
rotation (EN)
Hip Prosthesis (EN)
aged (EN)
Arthroplasty, Replacement, Hip (EN)
Scanning Electron Microscopy (EN)
article (EN)
bone radiography (EN)
total hip prosthesis (EN)
Implants (surgical) (EN)
hip arthroplasty (EN)
stress fracture (EN)
Mixed Mode (EN)

Journal of Materials Science: Materials in Medicine (EN)

Αγγλική γλώσσα

SPRINGER (EN)




*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.