Caractérisation des Phases dans le Polyéthylène par Effet Raman

Luu, Dang Vinh; Cambon, Louis; Lapeyre, Claude

doi:10.1002/jrs.1250090309

Cited by 40 publications

(28 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With regards to the insert of size #2, the average spectrum recorded on its top after the second test showed a certain weakening of the 1416 cm -1 band (δCH 2 mode of the crystalline orthorhombic phase [37,39] (Fig. 2a).…”

Section: Resultsmentioning

confidence: 98%

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Battaglia

Taddei

Tozzi

et al. 2014

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Purpose The research questions of the present study were: (1) Is total knee prosthesis wear behaviour influenced by implant size, body weight and their combined effect? (2) Are these findings significant and helpful from a clinical point of view? Methods Two very different sizes of the same total knee prosthesis (TKP), previously tested with ISO 14243 parameters, were tested on a knee simulator for a further two million cycles using a modified ISO 14243 load waveform. Roughness examination was performed on the metallic components. Gravimetric and micro-Raman spectroscopic analyses were carried out on the polyethylene inserts. Results The average volumetric mass loss was 69 ± 3 mm 3 and 88 ± 4 mm 3 for smaller and bigger size, respectively. Bigger TKPs are little influenced by an increased load, while the wear trend of the smaller TKP showed a redoubled slope, and more significant morphology changes were observed. However, the two sizes seem to behave similarly when subjected to a load increase of 15 %; the slope of the volumetric mass loss trend was comparable for the two sets of inserts, which did not appear significantly different also at the molecular level. Roughness average parameters of the lateral femoral condyle support this evidence. Conclusions It can be asserted that the body weight and implant size are relevant to the understanding of TKP wear behaviour. A post-implantation body weight increase in a patient with smaller knee dimensions could results in more critical effects on prosthesis long-term performance.

show abstract

Section: Resultsmentioning

confidence: 98%

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Battaglia

Taddei

Tozzi

et al. 2014

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

show abstract

“…It is a nondestructive method that does not need any sample preparation, which has been used for the analysis of polyethylene samples [10], since it reflects polyethylene crystals morphology [16].…”

Section: Discussionmentioning

confidence: 99%

“…In Table 4, the wavenumber of the polyethylene Raman bands in the 1600-1000 cm À1 range (PE fingerprint region) with their assignment [15] and the corresponding phases [16] are reported. Figure 5 shows the Raman comparison between the spectrum of the worn surface of an air-sterilized Hylamer TM acetabular liner and the Raman spectrum of the corresponding debris retrieval from the synovial tissue.…”

mentioning

confidence: 99%

Determination of Crystallinity and Crystal Structure of Hylamer™ Polyethylene after in vivo Wear

et al. 2006

View full text Add to dashboard Cite

ABSTRACT:Hylamer TM polyethylene is a crystalline form of polyethylene of 70% crystallinity whereas conventional polyethylene (PE) has 50% crystallinity. Crystallinity is the percentage by weight of the crystalline phase present in the whole polymer, which comprises both amorphous and crystalline phases.Clinical experience has shown that Hylamer TM components used in joint prostheses, if sterilized by gamma rays in the presence of oxygen, are easily affected by wear, which leads to osteolysis. The authors have analyzed the *Author to whom correspondence should be addressed. E-mail: visentin@tecno.ior.it TM polyethylene implants sterilized by gamma rays in air and had suffered prosthetic loosening, using Raman spectroscopy coupled with partial least squares (PLS) analysis. The results have been compared to those of two controls who had received Hylamer TM polyethylene implants sterilized by gamma irradiation in a nitrogen atmosphere. The crystal structure of wear particles released into the tissues from the Hylamer TM liners sterilized by gamma rays in air is also studied. The materials undergoing two different types of sterilization methods show different crystallinity values (71.50 vs. 69.43), but the crystallinity do not change according to wear (worn and unworn liner region). Both monoclinic and orthorhombic phases are present in the liner, while in wear debris prevalently monoclinic crystals are found in both types of sterilized liners. Different crystallinity rates can explain different wear rates observed in vivo. JOURNAL OF BIOMATERIALS APPLICATIONS

show abstract

“…The C-C stretching modes of PE are strongly Raman active [24][25][26][27]. The anti-symmetric (1063 cm −1 ) and symmetric (1130 cm −1 ) stretching modes correspond to vibrations of carbon atoms along and perpendicular to the molecular chain, respectively.…”

Section: Methodsmentioning

confidence: 99%

Rheo-optical Raman study of microscopic deformation in high-density polyethylene under hot drawing

2015

View full text Add to dashboard Cite

In situ observation of the microscopic structural changes in high-density polyethylene during hot drawing was performed by incorporating a temperature-controlled tensile machine into a Raman spectroscopy apparatus. It was found that the load sharing and molecular orientation during elongation drastically changed at 50°C. The microscopic stress of the crystalline chains decreased with increasing temperature and diminished around 50°C. Moreover, the orientation of the crystalline chains was greatly promoted above 50°C. These microscopic structural changes were caused by the thermal activation of the molecular motion within lamellar crystalline chains owing to the onset of relaxation of the crystalline phase.

show abstract

Caractérisation des Phases dans le Polyéthylène par Effet Raman

Abstract: Research on the Raman spectrum shows that the features of the different phases of which semi-crystalline polyethylene is composed can be obtained through bending vibrations of 6(CH2). BIBLIOGRAPHIE

Cited by 40 publications

References 10 publications

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Toward the interpretation of the combined effect of size and body weight on the tribological performance of total knee prostheses

Determination of Crystallinity and Crystal Structure of Hylamer™ Polyethylene after in vivo Wear

Rheo-optical Raman study of microscopic deformation in high-density polyethylene under hot drawing

Contact Info

Product

Resources

About