UHMWPE wear against roughened oxidized zirconium and CoCr femoral knee components during force-controlled simulation

DesJardins, John D.; Burnikel, Brian; LaBerge, Martine

doi:10.1016/j.wear.2007.03.020

Cited by 56 publications

(49 citation statements)

References 39 publications

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“…Prosthesis-wear and delamination are two major problems that limit the life of UHMWPE implants, with both phenomena being mainly the result of chemical oxidation of polymer. [1][2][3][4][5] The process of natural oxidative degradation of UHMWPE usually takes years and it is not possible to wait that long for data to be available when testing biomaterials. Hence, the oxidation of polymer is frequently conducted at highly stressing conditions, such as chemical, temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

FTIR Investigation of UHMWPE Oxidation Submitted to Accelerated Aging Procedure

Rocha¹,

Mansur²,

Mansur³

2010

Macromolecular Symposia

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Summary: In the present study, an accelerated ageing by oxidative degradation of UHMWPE in hydrogen peroxide solution was performed and the inhibition with ascorbic acid (vitamin C) was analyzed. Both systems were extensively characterized by Fourier Transformed Infrared Spectroscopy (FTIR). Different chemical groups of UHMWPE associated with the degradation reaction were monitored for over 120 days in order to evaluate the possible oxidation mechanisms involved and the inhibitory behavior of vitamin C. The results have provided strong evidence that the oxidation mechanism is rather complex, and 2 stages with their own particular first-order kinetics reaction patterns have been clearly identified. Furthermore, the vitamin C has proven to be an efficient antioxidant for UHMWPE under the evaluated conditions.

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Section: Introductionmentioning

confidence: 99%

FTIR Investigation of UHMWPE Oxidation Submitted to Accelerated Aging Procedure

Rocha¹,

Mansur²,

Mansur³

2010

Macromolecular Symposia

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“…Generally, design improvements and better quality of UHMWPE can address concerns associated with fatigue wear of the PE insert, however, there exist problems related to adhesive and abrasive wear caused by the hard counter face femoral component [39]. It has been indicated that both the polyethylene and the femoral surface are scratched and thus, roughening of the condyles occurs clinically [9]. The shapes and orientations of these scratches are the factors that increase PE wear [40,41].…”

Section: Biomaterials Considerationsmentioning

confidence: 99%

“…In this area, the number of promising biomedical materials is rapidly growing, mainly, to avoid the occurrence of implant failure and for better performance. Among the materials developed, metals and alloys such as new generation of Ti alloys, NiTi shape memory alloys, metallic glasses and porous metals [5][6][7], engineering ceramics including alumina-zirconia composites, oxidized zirconium and nonoxide ceramics [8,9], and polymeric materials such as UHMWPE-fiberreinforced high density polyethylene combined with a surface of UHMWPE, poly-ether-ether-ketone (PEEK), carbon fiber-reinforced PEEK (CFR-PEEK) [10][11][12][13][14][15][16], are believed to be high potential materials in orthopedics. On the other hand, implant design modifications are always carried out (from simple design to complex shape similar to biological organs) to prevent any failure response.…”

Section: Introductionmentioning

confidence: 99%

Aseptic loosening of femoral components – Materials engineering and design considerations

et al. 2013

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a b s t r a c tAseptic loosening is one of the main reasons for the revision of a total knee replacement (TKR). The design of the key component of a TKR, the femoral component, is particularly problematic because its failure can be the result of different causes. This makes the development of new biomaterials for use in the femoral component a challenging task. This paper focuses on the engineering design aspects in order to understand the limitations of current materials and design deficiencies. The paper describes the introduction of a new biomaterial for a femoral component and justifies the recommendation to use multi-functional materials as a possible solution to aseptic loosening. The potential advantages of applying functionally graded biomaterials (FGBMs) in prosthetic femur are explained by reducing the leading causes of failure including wear, micro-motion and stress-shielding effect. The ideas presented in this paper can be used as the basis for further research on the feasibility and advantages of applying FGBM in other superior implant designs.

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“…An oxidized Zr femoral component has been found to be a safe material in nickel-sensitive patients due to no traceable nickel content in this material [147]. Furthermore, it has been proven that femoral components of TKR made of this material provide less PE wear (both adhesive and abrasive phenomena) compared with Co-Cr alloy [113,[148][149][150][151][152]. However, there exist limitations including fairly modest reductions in PE wear rates and low resistance to scratching, which may be related to the lower surface hardness of oxidized zirconium compared with alumina [110].…”

Section: Oxidized Zirconiummentioning

confidence: 99%