Porosity of Various Preparations of Acrylic Bone Cements

Jasty, Murali; Jp, Davies; O'Connor, D.O.; Burke, D. L.; Tp, Harrigan; Wh, Harris

doi:10.1097/00003086-199010000-00018

Cited by 65 publications

(36 citation statements)

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“…Effects of precooled monomer may vary between various brands of bone cement. 18,21,33 Although some investigators cooled the whole cement package, including liquid monomer and powder polymer, only liquid monomer was cooled in this study. The powder was not heated because it contains a catalyst and may result in too-rapid polymerization.…”

Section: Discussionmentioning

confidence: 99%

“…16 -19 Heating or cooling bone cement may also affect development of porosity within the cement mantle. 20,21 However, it is not clear whether and how the initial temperature of bone cement affects interfacial porosity, the mechanical strength of the stem-cement interface, and the risk of thermal necrosis of bone tissue at the cement-bone interface. Those factors are considered to be critical in the longevity of a total hip arthroplasty in vivo.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the initial temperature of acrylic bone cement liquid monomer on the properties of the stem–cement interface and cement polymerization

2003

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It has been shown that preheating the femoral stem prior to insertion minimizes interfacial porosity at the stem-cement interface. In this study, the effects of methylmethacrylate monomer temperature prior to mixing on the properties of stem-cement interface and cement polymerization were evaluated for 4 degrees C, room temperature, and 37 degrees C using a test model and cementing techniques that simulated a clinical situation. The nature and extent of interfacial porosity of stem-cement interface was quantified, the static shear strength of the stem-cement interface determined, and the time and temperature of polymerization at the cement-bone interface were measured. Compared to RT monomer, preheating monomer to 37 degrees C produced higher polymerization temperatures and greater initial interfacial shear strength with an unchanged amount of interfacial porosity. Precooling monomer to 4 degrees C produced lower polymerization temperatures and decreased initial interfacial shear strength, with the amount of interfacial porosity unchanged compared to the RT group. Although clinical techniques of preheating or precooling bone cement have some effects on the properties of the stem-cement interface and cement polymerization, they do not appear to enhance implant fixation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the initial temperature of acrylic bone cement liquid monomer on the properties of the stem–cement interface and cement polymerization

2003

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“…The Palacos cement is porous, 21,22 which explains the first stage of fast water absorption in sample PG0: Water can also diffuse slowly through the matrix (second stage in sample PG0). With these characteristics, the gentamicin elution process in the Palacos R-gentamicin system may be depicted as follows:…”

Section: Discussionmentioning

confidence: 99%

Effect of antibiotics on the properties of poly(methylmethacrylate)‐based bone cement

Trotignon

Loty

et al. 2002

J. Biomed. Mater. Res.

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The goal of this study was to examine the relationship between gentamicin concentration in Palacos R bone cement (in the mass fraction range of 0-9.4%) and various properties of the cement. The results from the thermal, density, and static compression tests show that gentamicin favors the cement polymerization in its final steps, and forms a diphasic structure with the cement [poly(methylmethacrylate)] matrix. The static compression properties in the dry state are only slightly modified by the presence of the antibiotic. Concerning aging in water at 37 degrees C, two types of behavior can be distinguished: below a critical concentration, approximately 3-4%, the extraction of gentamicin by water is slow and there is only a slight change of static compression properties. In contrast, above this critical concentration, the gentamicin extraction is fast and almost complete after 48 weeks, and there is a considerable loss of static compression properties.

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“…A clear relationship exists between porosity and the biomechanical performance of the cement (Jasty et al 1990). The performance of the implant-mantle construct depends on the intrinsic strength of the cement and the stability of the interfaces.…”

Section: Discussionmentioning

confidence: 99%