Release of residual methyl methacrylate into water from glass fibre-poly(methyl methacrylate) composite used in dentures

Miettinen, Varpu M.; Vallittu, Pekka K.

doi:10.1016/s0142-9612(96)00123-8

Cited by 70 publications

(55 citation statements)

References 27 publications

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“…This might be due to the variations in the initiator-activator systems or in the used powder/ liquid ratio. Moreover, when glass fibers were added to the powderliquid type acrylic resin system, the quantity of the released residual MMA was shown to increase [27], a finding, which was also confirmed by the present study.…”

Section: Discussionsupporting

confidence: 89%

Exothermal Characteristics and Release of Residual Monomers from Fiber-reinforced Oligomer-modified Acrylic Bone Cement

et al. 2005

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The aim of this study is to determine the peak temperature of polymerization, the setting time and the release of residual monomers of a modified acrylic bone cement. Palacos Õ R, a commercial bone cement, is used as the main component. The cement is modified by adding short glass fibers and resorbable oligomer fillers, and an additional cross-linking monomer. The test specimens are classified according to the composition of the bone cement matrix (i.e., oligomer-filler, glass-fiber reinforcement, and/or cross-linking monomer). The exothermal characteristics during autopolymerization are analyzed using a transducer connected with a computer. The quantities of residual monomers were analyzed from different test groups using high performance liquid chromatography (HPLC). The ÁT value for the oligomer filler and the glass-fiber-containing acrylic bone cement is lower than that for the unmodified bone cement (2.1 AE 0.8 C vs. 23.5 AE 4.2 C). The addition of a cross-linking monomer, EGDMA, shortens the setting time of the autopolymerization of the unmodified bone cement (7.1 AE 0.9 min vs. 3.3 AE 0.3 min).*Author to whom correspondence should be addressed. E-mail: mervi.puska@utu.fi The quantity of the residual monomers released is higher in the modified bone cement than that in the unmodified cement. The cement that contains glass fibers and oligomer fillers has a considerably lower exothermal peak, whereas the total quantity of residual monomers released is increased. JOURNAL OF BIOMATERIALS APPLICATIONS

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Section: Discussionsupporting

confidence: 89%

Exothermal Characteristics and Release of Residual Monomers from Fiber-reinforced Oligomer-modified Acrylic Bone Cement

et al. 2005

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“…A higher residual monomer content is seen after polymerization of denture base resins in auto-polymerized resin compared with heat-polymerized resin 8) . On the other hand, the maximum permissible limit of the residual monomer in heat polymerized resins should be less than 2.2% 9) . During the initial days of water storage of the polymerized denture base it is known to leach residual monomers.…”

Section: Introductionmentioning

confidence: 99%

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

et al. 2017

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This laboratory study was assessing the nano-mechanical properties (NMP), surface roughness (Sa), and topographic changes caused by ethanol on the surface of heat-polymerized denture base polymers at different time past dough stage. Specimens of heat polymerizing acrylic resin (Interacryl Hot, Interdent, Celje, Slovenia) of size 10×10×3 mm were prepared, wet ground, and polished for uniform smoothness and treated with ethanol in concentrations of 40, 70, and 99.9% for 30, 60, and 120 s and statistical analysis was done. Some statistical significance for Sa were highest with 120 s exposure to 40% ethanol. NMP were the highest for specimens treated with 99.9% ethanol concentration for 120 s, on specimens prepared 30 min past the dough stage. This study suggested that heat-polymerized denture base polymers are prone for changes by ethanol which alters mechanical properties and surface topography. Dough time influenced the ethanol resistance.

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“…Promising clinical results at an early stage using these composite materials as bone substitutes have recently been achieved in the field of head and neck surgery (Tuusa et al 2005). Residual monomers (MMA) leaching from PMMA-based fiber-reinforced polymers have even been associated with cytotoxic effects, but this has been proven to be clinically irrelevant after adequate prosessing and preoperative storage (Vallittu et al 1995, Miettinen andVallittu 1997).…”

Section: Discussionmentioning

confidence: 99%

Repair of bone segment defects with surface porous fiber‐reinforced polymethyl methacrylate (PMMA) composite prosthesis: Histomorphometric incorporation model and characterization by SEM

et al. 2008

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Background and purpose Polymer technology has provided solutions for filling of bone defects in situations where there may be technical or biological complications with autografts, allografts, and metal prostheses. We present an experimental study on segmental bone defect reconstruction using a polymethylmethacrylate-(PMMA-) based bulk polymer implant prosthesis. We concentrated on osteoconductivity and surface characteristics. Material and methods A critical size segment defect of the rabbit tibia in 19 animals aged 18-24 weeks was reconstructed with a surface porous glass fiber-reinforced (SPF) prosthesis made of polymethylmethacrylate (PMMA). The biomechanical properties of SPF implant material were previously adjusted technically to mimic the properties of normal cortical bone. A plain PMMA implant with no porosity or fiber reinforcement was used as a control. Radiology, histomorphometry, and scanning electron microscopy (SEM) were used for analysis of bone growth into the prosthesis during incorporation.Results The radiographic and histological incorporation model showed good host bone contact, and strong formation of new bone as double cortex. Histomorphometric evaluation showed that the bone contact index (BCI) at the posterior surface interface was higher with the SPF implant than for the control. The total appositional bone growth over the posterior surface (area %) was also stronger for the SPF implant than for controls.

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Release of residual methyl methacrylate into water from glass fibre-poly(methyl methacrylate) composite used in dentures

Cited by 70 publications

References 27 publications

Exothermal Characteristics and Release of Residual Monomers from Fiber-reinforced Oligomer-modified Acrylic Bone Cement

Exothermal Characteristics and Release of Residual Monomers from Fiber-reinforced Oligomer-modified Acrylic Bone Cement

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

Repair of bone segment defects with surface porous fiber‐reinforced polymethyl methacrylate (PMMA) composite prosthesis: Histomorphometric incorporation model and characterization by SEM

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