The usage period of dentures and their residual monomer contents

Sadamori, Shinsuke; Kotani, Hiroo; Hamada, Takashi

doi:10.1016/0022-3913(92)90349-f

Cited by 51 publications

(41 citation statements)

References 11 publications

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“…There are many studies about the physiochemical deterioration of surface properties and bending strength of PMMA due to water absorption 3) , chemical reagents such as ethanol and acid 4) , mechanical stress such as occlusal force 5) and thermal stress such as dietary components [6][7][8] . On the other hand, the elution of monomers from PMMA prosthesis 9,10) is the only study topic concerned with biological factors, such as salivary enzymes and oral microbiota. Composite resins are only dental polymers, which have been studies about oral biodeterioration and reported that the main chain (Bis-GMA) and its modified chain of composite resin polymers were broken down by cholesterol esterases contained in saliva [11][12][13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Deterioration of polymethyl methacrylate dentures in the oral cavity

Matsuo

Suenaga

Takahashi

et al. 2015

Dental Materials Journal

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Polymethyl methacrylate (PMMA)-made prostheses used in the oral cavity were evaluated by multimodal assessment in order to elucidate the biodeterioration of PMMA. In used dentures (UD), the micro-Vickers hardness of the polished denture surface and denture basal surface was lower than that of the torn surface (p<0.05), whereas the shaved surface approximately 100 µm from the polished surface showed a similar value to the torn surface. By contrast, there were no differences among these surfaces in new resin (NR). The volatile content of UD was higher than that of NR (p<0.05). Component analysis by ATR-FTIR showed specific spectra (1,700-1,400 cm −1 ) only in UD. This study revealed that PMMA deteriorated during long-term use in the oral cavity in terms of hardness and volatile content with component alteration, and suggests the involvement of biodeterioration, possibly due to saliva and oral microbiota.

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Section: Introductionmentioning

confidence: 99%

Deterioration of polymethyl methacrylate dentures in the oral cavity

Matsuo

Suenaga

Takahashi

et al. 2015

Dental Materials Journal

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“…More recently, a novel method of acquiring the test specimen for investigation by gas chromatography was introduced,21 whereby the eluates were extracted out of the polymerized acrylic resin plate using solvents. The resulting solution was then centrifuged, and the yield was subjected to gas chromatographic analysis for estimation of eluate concentrations.…”

Section: Introductionmentioning

confidence: 99%

New form of administering chlorhexidine for treatment of denture-induced stomatitis

Ryalat¹,

Darwish²,

Amin³

2011

TCRM

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Background:The purpose of this study was to evaluate the release of chlorhexidine as an antifungal drug from doped self-cured poly (methyl methacrylate) (PMMA) acrylic resin and the effect of the drug released on the growth of Candida albicans.Methods:Release of chlorhexidine was evaluated using liquid chromatography, and the effect of the drug on the growth of C. albicans was investigated microbiologically using a “well” technique on Saboraud culture medium inoculated with a resistant strain of C. albicans.Results:Chlorhexidine leached steadily out of the acrylic resin into distilled water at mouth temperature, and the sustained drug release continued throughout the 28-day test period. The drug released also demonstrated antifungal activity against the resistant strain of C. albicans.Conclusion:The findings of this study support the use of chlorhexidine-impregnated self-cured PMMA chair-side resin as a new dosage form for the treatment of denture-induced stomatitis.

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“…However, residual monomer can be detected in denture base polymer even after the denture has been worn for 5-20 years [5,6]. Many studies have reported that residual monomer acts as plasticizer, which affects the physical properties of acrylic resin (e.g., decreasing the impact strength and causing color changes) [7][8][9].…”

Section: Introductionmentioning

confidence: 98%