Effects of radiation-sterilization on medical implants

Jahan, M. S.; Thomas, D.E.; Banerjee, K.; Trieu, Hai; Haggard, W.O.; Parr, J.E.

doi:10.1016/s0969-806x(97)00208-9

Cited by 17 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the ESR spectra of the gamma-irradiated specimens were similar to those of the allyl and peroxy radicals generated by gamma irradiation in a tibial component of an articial knee joint, as reported by Jahan et al 12) In addition, the results of studies on time-dependent changes in free radicals performed by Nakamura et al 16) and Zhao et al 17) indicated that the generation of allyl radicals was thought to begin on Day 7 after irradiation and that of peroxy radicals was thought to begin on or after Day 21.…”

Section: Discussionsupporting

confidence: 84%

See 1 more Smart Citation

Effect of Irradiation Treatment on Compressive Properties of Ultra-High-Molecular-Weight Polyethylene

et al. 2017

View full text Add to dashboard Cite

Ultra-high-molecular-weight polyethylene (UHMWPE) is used as a bearing material in total joint prostheses. One of the criterion that determines the strength of medical UHMWPE is its tensile properties. However, its compressive properties, which play an important role in determining the durability of the contact surfaces of prostheses, have not yet been considered. In this study, we examined the effect of gamma and electron beam irradiation treatment on the compressive properties of medical UHMWPE. The compressive properties (Young s modulus and proof stress) of the gamma-irradiated specimens were higher than those of the nonirradiated specimens. The plastic ow pressure of the electron-beam-irradiated specimens was higher than that of the nonirradiated specimens. The inhibition of plastic deformation of the noncrystalline structure due to electron beam irradiation is considered to have increased the plastic ow pressure. The electron beam irradiation treatment was found to be effective for the surface enhancement of medical UHMWPE. An electron spin resonance signal was clearly observed in the irradiated UHMWPE specimen. These results indicated that dangling bonds were probably formed in the irradiated UHMWPE.

show abstract

Section: Discussionsupporting

confidence: 84%

“…Spectrum (b) on Day 7 shows the characteristics of allyl radicals, whereas spectra (c)-(f) after Day 7 show the characteristics of peroxy radicals 12) . Figure 9 shows the ESR spectra of the specimens treated by EB irradiation at 25 kGy.…”

Section: Change In Esr Spectramentioning

confidence: 99%

Effect of Irradiation Treatment on Compressive Properties of Ultra-High-Molecular-Weight Polyethylene

et al. 2017

View full text Add to dashboard Cite

show abstract

“…It is known that irradiation produces highly reactive radical species in the core, as well as the surface, of bulk UHMWPE (Jahan et al, 1998). Free radicals can reside in the amorphous as well as crystalline regions of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Studies on electron-beam irradiation and plastic deformation of medical-grade ultra-high molecular weight polyethylene

Czaja

Sudoł

2011

Radiation Physics and Chemistry

View full text Add to dashboard Cite

“…Before use, UHMWPE is subjected to high dose gamma irradiation which, although effective as a sterilizing agent, de-links polymer bonds creating free-radicals in the process [2].…”

mentioning

confidence: 99%

“…Free radicals produced following irradiation consist mainly of allyl and alkyl types [1,2]. Some of the free radicals undergo oxidation thus accelerating the degradation of UHMWPE [3].…”

mentioning

confidence: 99%

Phosphorescence of orthopaedic– grade ultra high molecular weight polyethylene

Chithambo

2008

Phys. Status Solidi (c)

View full text Add to dashboard Cite

Isothermal luminescence decay curves have been measured from orthopaedic–standard ultra high molecular weight polyethylene between 35 and 70 °C on the rising edge of the main glow peak at 70 °C. Preparatory peak‐shape analysis of the temperature‐resolved glow peak at 70 °C measured at 1 °C s−1 gave a geometrical factor close to 0.5 suggestive of second order kinetics for both the isothermal and thermally stimulated luminescence. The results of analysis of the phosphorescence of transformed monotonic‐to‐peak isothermal decay curves are also second order, as is the conclusion from thermoluminescence glow‐curve de‐convolution. All methods of analysis give an activation energy of about 0.7 eV. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Effects of radiation-sterilization on medical implants

Cited by 17 publications

References 1 publication

Effect of Irradiation Treatment on Compressive Properties of Ultra-High-Molecular-Weight Polyethylene

Effect of Irradiation Treatment on Compressive Properties of Ultra-High-Molecular-Weight Polyethylene

Studies on electron-beam irradiation and plastic deformation of medical-grade ultra-high molecular weight polyethylene

Phosphorescence of orthopaedic– grade ultra high molecular weight polyethylene

Contact Info

Product

Resources

About