Improved bonding strength of polyethylene/polymethylmetacrylate bone cement – a preliminary study

Khang, Gilson; Kang, Yoon H.; Park, Joon B.; Lee, Hai Bang

doi:10.3233/bme-1996-6503

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…24 On the other hand, low density PE (LDPE) samples were then air dried for 24 h and placed in a vacuum showed improved adhesion to bone cement under such chamber to extract any access amount of xylene for another treatment. 58 In a previous study, LDPE was treated by co-48 h at 40 ЊC. Based on the previous experiments, such a rona discharge and successfully bonded to acrylic bone procedure showed a reasonably sufficient drying effect of cement.…”

Section: Methodsmentioning

confidence: 98%

“…Based on the previous experiments, such a rona discharge and successfully bonded to acrylic bone procedure showed a reasonably sufficient drying effect of cement. 58 From the 180Њ peel-off test, the mechanical the excess amount of residual xylene and complete polystrength was observed at 1.75 kgf/cm (17.5 N/cm). merization of MMA monomers within the UHMWPE ma-However, the method used in the previous study was trix.…”

Section: Methodsmentioning

confidence: 99%

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Precoating of ultrahigh molecular weight polyethylene with polymethylmethacrylate: Interfacial strength

Kang¹,

Park²

1998

J. Biomed. Mater. Res.

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Fixation of polymeric implants, especially an ultrahigh molecular weight polyethylene (UHMWPE) acetabular cup, to a host bone site has been a challenge since its first conception from the Charnley low friction total hip arthroplasty. Destabilization of the acetabular cup, similar to the well-documented cases of femoral stems, is caused mainly by aseptic loosening; the mobile loosened particles further contribute to the progression of aseptic loosening. Although the obvious fixation problems lie in the bone-bone cement interface, little work has been done to reduce the loosening by improving the acetabular components as a whole in cemented procedures. Most of the grooved outer surface, external fixation devices, and metal backings have been introduced to avoid problematic fixation of the cup to bone cement; nevertheless, the designs themselves to some degree became the source of the loosening problems. One possible way to improve the adhesion of acrylic bone cement to the UHMWPE acetabular cup is precoating the surface with polymethylmethacrylate (PMMA). This study successfully precoated the UHMWPE surface with PMMA, showing good chemical and mechanical stability, and suggests the optimal conditions of variables involved in the newly developed precoating process. The highest interfacial tensile strength was 11.51 { 0.65 MPa, which is stronger than those of UHMWPE and metal in metal-backed cups (6.3 MPa) and bone-bone cement (8.5 MPa). Further chemical analysis and mechanical testing are in progress, yet the present result of the mechanical tensile strength test showed that the precoating process for the UHMWPE surface could be a viable means toward stable fixation of the polymeric implants by using PMMA bone cement. ) Contract/grant sponsor: Biomaterials Research Fund of the Univ. of Iowa radiolucency with a 6% revision rate in metal-back cases compared to 23% radiolucency and a 2% revision rate.

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Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Precoating of ultrahigh molecular weight polyethylene with polymethylmethacrylate: Interfacial strength

Kang¹,

Park²

1998

J. Biomed. Mater. Res.

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Evaluation of bioactive bone cement in canine total hip arthroplasty

Fujita¹,

Ido²,

Matsuda³

et al. 2000

J. Biomed. Mater. Res.

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Total hip arthroplasties (THAs) were performed in beagle dogs using a bioactive bone cement (BABC) consisting of a silane-treated apatite- and wollastonite-containing glass-ceramic (AW glass-ceramic) powder and a silica glass powder as the filling particles and a bisphenol-A-glycidyl dimethacrylate-based resin (Bis-GMA-based resin) as the organic matrix. The outcomes were compared with the results of polymethylmethacrylate (PMMA) bone cement. The mechanical properties of the BABC were stronger than those of PMMA bone cement. The bonding strength of the BABC to bone in the dogs' femora increased with time and reached 3.7 MPa at 24 months after implantation whereas that of PMMA bone cement was 2.0 MPa (p < 0.05). Histological examination showed direct bonding between the BABC and the femoral bone for up to 24 months after implantation. However, with PMMA bone cement an intervening soft-tissue layer consistently was observed at the bone-cement interface. Direct bonding at the interface between the BABC and the bone through a calcium phosphorous layer 30 microm-thick was revealed by scanning electron microscopy. Femoral bone resorption was observed at 24 months after implantation in the BABC group, but it was not observed in the PMMA bone cement group. Direct bonding between BABC and the bone may have accelerated femoral bone resorption. Cement fractures of the BABC were observed on the acetabular side 24 months after implantation. Weak bonding between the BABC and an acetabular component made of ultrahigh molecular weight polyethylene (UHMWPE), relatively high elastic characteristics of BABC, and weakness of the calcium phosphorous layer formed on the surface of this cement seemed to lead to failure at 24 months on the acetabular side.

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Surface and chemical properties of surface-modified UHMWPE powder and mechanical and thermal properties of its impregnated PMMA bone cement V. Effect of silane coupling agent on the surface modification of UHMWPE powder

et al. 2005

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Conventional poly(methyl methacrylate) (PMMA) bone cement has been widely used as an useful biopolymeric material to fix bone using artificial prostheses. However, many patients had to be reoperated, due to the poor mechanical and thermal properties of conventional PMMA bone cement, which are derived from the presence of unreacted MMA liquid, the shrinkage and bubble formation that occur during the curing process of the bone cement, and the high curing temperature (above 100 o C) which has to be used. In the present study, a composite PMMA bone cement was prepared by impregnating conventional PMMA bone cement with ultra high molecular weight polyethylene (UHMWPE) powder, in order to improve its mechanical and thermal properties. The UHM-WPE powder has poor adhesion with other biopolymeric materials due to the inertness of the powder surface. Therefore, the surface of the UHMWPE powder was modified with two kinds of silane coupling agent containing amino groups (3-amino propyltriethoxysilane (TSL 8331 ® ) and N-(2-aminoethyl)-3-(amino propyltrimethoxysilane) (TSL 8340 ® )), in order to improve its bonding strength with the conventional PMMA bone cement. The tensile strengths of the composite PMMA bone cements containing 3 wt% of the UHMWPE powder surface-modified with various ratios of TSL 8331 ® and TSL 8340 ® were similar or a little higher than that of the conventional PMMA bone cement. However, no significant difference in the tensile strengths between the conventional PMMA bone cement and the composite PMMA bone cements could be found. However, the curing temperatures of the composite PMMA bone cements were significantly decreased.

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Improved bonding strength of polyethylene/polymethylmetacrylate bone cement – a preliminary study

Cited by 7 publications

References 5 publications

Precoating of ultrahigh molecular weight polyethylene with polymethylmethacrylate: Interfacial strength

Precoating of ultrahigh molecular weight polyethylene with polymethylmethacrylate: Interfacial strength

Evaluation of bioactive bone cement in canine total hip arthroplasty

Surface and chemical properties of surface-modified UHMWPE powder and mechanical and thermal properties of its impregnated PMMA bone cement V. Effect of silane coupling agent on the surface modification of UHMWPE powder

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