Investigation of a fatigue failure in a stainless steel femoral plate

Marcomini, José Benedito; Baptista, Carlos Antônio Reis Pereira; Pascon, João Paulo; Teixeira, Ricardo Luiz Perez; Reis, Flávio Pola dos

doi:10.1016/j.jmbbm.2014.06.011

Cited by 23 publications

(14 citation statements)

References 12 publications

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“…Several reports confirm the premature failure of the implanted hard tissue such as bone and teeth as elaborated in Section 3.1. Poor corrosion and wear characteristics of the implant material like stainless steel, Co-Cr, and Ti alloys are considered as the root cause of this problem [60][61][62][63]66]. However, formation or deposition of hard carbide layer on the implant surface remained the key remedy to this issue.…”

Section: Hard and Nanoporous Carbide Layer Formationmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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Surface treatment remained a key solution to numerous problems of synthetic hard tissues. The basic methods of implant surface modification include various physical and chemical deposition techniques. However, most of these techniques have several drawbacks such as excessive cost and surface cracks and require very high sintering temperature. Additive mixed-electric discharge machining (AM-EDM) is an emerging technology which simultaneously acts as a machining and surface modification technique. Aside from the mere molds, dies, and tool fabrication, AM-EDM is materializing to finishing of automobiles and aerospace, nuclear, and biomedical components, through the concept of material migrations. The mechanism of material transfer by AM-EDM resembles electrophoretic deposition, whereby the additives in the AM-EDM dielectric fluids are melted and migrate to the machined surface, forming a mirror-like finishing characterized by extremely hard, nanostructured, and nanoporous layers. These layers promote the bone in-growth and strengthen the cell adhesion. Implant shaping and surface treatment through AM-EDM are becoming a key research focus in recent years. This paper reports and summarizes the current advancement of AM-EDM as a potential tool for orthopedic and dental implant fabrication. Towards the end of this paper, the current challenges and future research trends are highlighted.

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Section: Hard and Nanoporous Carbide Layer Formationmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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“…In addition, successful fixation result in anatomic reduction, stable fixation, preservation of blood supply, and early mobilization [5][6][7][8][9] which occur with the use of locking compression technology. A summary of device failures was compiled from literature [10][11][12][13][14][15][16][17][18][19][20][21][22][23] (see Appendix A). It identifies the devices, material of construction, failure modes and other fracture features.…”

Section: Introductionmentioning

confidence: 99%

“…It is noteworthy that this may be the only case involving the failure analysis of PHILOS ( Figure 1). A number of studies involving SS316L material revealed inclusion sites as crack origins [10,[15][16][17][18], corrosion, wear and fatigue [10][11][12][13]15,16,18,19,21,23] with no visible mechanical failure yet having failed clinically [12,14]. The majority of the devices were constructed with SS 316 and 316L; however, a few devices constructed with Ti-6Al-4V alloy [19][20][21][22] and pure titanium [23] were also found.…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of PHILOS Plate Construct Used for Pantalar Arthrodesis Paper I—Analysis of the Plate

Ina

Vallentyne

Hamandi

et al. 2018

Metals

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Abstract:The failure of a proximal humerus internal locking system (PHILOS) used in a pantalar arthrodesis was investigated in this paper. PHILOS constructs are hybrids using locking and non-locking screws. Both the plate and the screws used in the fusion were obtained for analysis. However, only the plate failure analysis is reported in this paper. The implant had failed in several pieces. Optical and scanning electron microscopic analyses were performed to characterize the failure mode(s) and fracture surface. The chemical composition and mechanical properties of the plate were determined and compared to controlling specifications to manufacture the devices. We found that equivalent tensile strength exceeded at the locations of high stress, axial, and angular displacement and matched the specification at the regions of lower stress/displacement. Such a region-wise change in mechanical properties with in vivo utilization has not been reported in the literature. Evidence of inclusions was qualitatively determined for the stainless steel 316L plate failing the specifications. Pitting corrosion, scratches, discoloration and debris were present on the plate. Fracture surface showed (1) multi-site corrosion damage within the screw holes forming a 45 • maximum shear force line for crack-linking, and (2) crack propagation perpendicular to the crack forming origin that may have formed due to the presence of inclusions. Fracture features such as beach marks and striations indicating that corrosion may have initiated the crack(s), which grew by fatigue over a period of time.In conclusion, the most likely mechanism of failure for the device was due to corrosion fatigue and lack of bony in-growth on the screws that may have caused loosening of the device causing deformity and pre-mature failure.

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“…O segundo aspecto está relacionado com as propriedades do material utilizado nos implantes. Estudos de casos de falhas em implantes apontam fatores como concentração de tensões mecânicas e defeitos, tais como inclusões, juntamente com a ação de um meio agressivo; diferentes tipos de danos causados por corrosão em fresta, por pites, e iniciação de trincas oriundas desses pites; trincas ramificadas, como as oriundas de corrosão sob tensão, e trincas intergranulares; e segregação em contornos de grãos (PROVERBIO, BONACCORSI, 2001;AMEL-FAZARD, PEIVANDI, YUSOF-SANI, 2007;MARCOMANNI et al, 2014).…”

Section: Introductionunclassified

“…Têm sido observadas também, falhas por fadiga sem claras evidências de corrosão (PROVERBIO, BONACCORSI, 2001;AMEL-FAZARD, PEIVANDI, YUSOF-SANI, 2007;MARCOMANNI et al, 2014;GERVAIS et al, 2016).…”

Section: Introductionunclassified

Efeito da deformação plástica uniaxial na resistência à corrosão-fadiga do aço inoxidável ISO 5832-1

Naville¹

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Processos de deformação plástica modificam o comportamento à fadiga dos aços inoxidáveis. A combinação desse efeito com um meio corrosivo pode afetar o comportamento frente à corrosãofadiga do material. Isso ocorre por meio de interações entre o meio e a superfície do material deformado, particularmente com as bandas de escorregamento, inclusões e defeitos superficiais que, simultaneamente com o carregamento cíclico, levam à quebra do filme passivo. É esperado que diferentes sentidos de deformação plástica uniaxial apresentem diferentes efeitos no comportamento à corrosão-fadiga, uma vez que a extensão das interações superficiais é diferente em cada caso. Nesse estudo, o efeito da deformação plástica uniaxial em dois sentidos, de tração e de compressão, na resistência à corrosão-fadiga do aço inoxidável ISO 5832-1, material usado em implantes ortopédicos de fixação interna, do tipo placa óssea, foi investigado. Corpos de prova foram submetidos a deformação plástica em compressão ou em tração e, depois, a um condicionamento prévio seguido do ensaio de corrosão-fadiga. Os testes de corrosão-fadiga foram realizados com circulação de dois meios corrosivos. O primeiro meio consistiu em uma solução PBS com 0,9 % em massa de NaCl em água deionizada (pH neutro). O segundo meio de solução com 0,9% de NaCl, 1% H2O2 e 1% Albumina (pH 3), todas as porcentagens em massa. Os dois meios foram utilizados na temperatura de 37 ± 1 o C. Amostras como recebidas (sem deformação uniaxial) no estado solubilizado também foram ensaiadas para comparação com as amostras deformadas. Os ensaios com a solução PBS não produziram corrosão por pite e a deformação plástica, seja em tração ou compressão, aumentou a resistência à corrosão-fadiga, comparadas ao material isento de deformação plástica. Todavia, na solução com cloreto de sódio, H2O2 e albumina (pH 3), houve redução da resistência à corrosão-fadiga em todas as condições de teste, comparando-se ao uso da solução PBS. Esse efeito foi mais pronunciado para os corpos de prova previamente deformados plasticamente por tração em comparação aos deformados por compressão. A exposição a esta solução promoveu pites de corrosão no carregamento cíclico que atuaram como concentradores de tensão e, consequentemente, aceleraram a falha por corrosão-fadiga. Palavras-chave: implantes; biomateriais; corrosão-fadiga; deformação plástica uniaxial, aço inoxidável.

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Investigation of a fatigue failure in a stainless steel femoral plate

Cited by 23 publications

References 12 publications

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Failure Analysis of PHILOS Plate Construct Used for Pantalar Arthrodesis Paper I—Analysis of the Plate

Efeito da deformação plástica uniaxial na resistência à corrosão-fadiga do aço inoxidável ISO 5832-1

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