Retrieval Analysis of Hip Prostheses

Antoniac, Iulian Vasile; Miculescu, Florin; Lăptoiu, Dan; Antoniac, Aurora; Niculescu, Marius; Grecu, D

doi:10.1007/978-3-319-09230-0_43-1

Cited by 1 publication

(2 citation statements)

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“…The implant life expectancy depends on the device design and the used biomaterials [ 11 , 12 ]. All the materials must be Food and Drug Administration (FDA) approved or carry the Conformitè Europëenne certificate [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Retrieval analysis of well-functioning and failed implants is of great importance in the orthopedic biomaterials field because surgical technique, implant design, and material quality can be improved in order to repair joints affected by diseases or trauma [ 14 , 47 ]. The standard ASTM F561-97 recognizes the importance of this analysis and concludes that two factors are met to obtain a successful implant integration [ 48 ].…”

Section: Introductionmentioning

confidence: 99%

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Failure Analysis of Ultra-High Molecular Weight Polyethylene Tibial Insert in Total Knee Arthroplasty

Paltanea

Antoniac

et al. 2022

Materials

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Knee osteoarthritis is treated based on total knee arthroplasty (TKA) interventions. The most frequent failure cause identified in surgical practice is due to wear and oxidation processes of the prothesis’ tibial insert. This component is usually manufactured from ultra-high molecular weight polyethylene (UHMWPE). To estimate the clinical complications related to a specific prosthesis design, we investigated four UHMWPE tibial inserts retrieved from patients from Clinical Hospital Colentina, Bucharest, Romania. For the initial analysis of the polyethylene degradation modes, macrophotography was chosen. A light stereomicroscope was used to estimate the structural performance and the implant surface degradation. Scanning electron microscopy confirmed the optical results and fulfilled the computation of the Hood index. The oxidation process in UHMWPE was analyzed based on Fourier-transform infrared spectroscopy (FTIR). The crystallinity degree and the oxidation index were computed in good agreement with the existing standards. Mechanical characterization was conducted based on the small punch test. The elastic modulus, initial peak load, ultimate load, and ultimate displacement were estimated. Based on the aforementioned experimental tests, a variation between 9 and 32 was found in the case of the Hood score. The oxidation index has a value of 1.33 for the reference sample and a maximum of 9.78 for a retrieved sample.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%