The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-<i>n</i>-butyl Itaconate

Spasojević, Pavle; Zrilić, Milorad; Panic, Vesna V.; Stamenković, Dragoslav; Šešlija, Sanja I.; Veličković, Suzana

doi:10.1155/2015/561012

Cited by 43 publications

(40 citation statements)

References 30 publications

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“…Using CAD/CAM technique in fabrication of complete dentures has two main targets; to provide complete dentures of a better quality and to reduce the chair time. Nowadays, this is possible due to improved materials and technologies, which show advancements to conventional materials used for fabrication of complete dentures (10) . The most popular material used for denture base construction is poly-methyl-methacrylate (PMMA), which has good properties, including biocompatibility, ease of processing, stability and acceptable esthetics.…”

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confidence: 99%

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Assessment of Microbial Adherence on Conventional and CAD/CAM Complete Denture

Kholief

Kabeel

2019

ADJ-for Girls

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Purpose: The aim of the study was to assess microbial adherence on maxillary complete denture carried by different fabrication techniques; the conventional and CAD/CAM (computer-aided design and computer-aided manufacturing) techniques. Material and methods: Ten completely edentulous patients were selected and divided into randomly two equal groups: group I, patients received maxillary and mandibular complete dentures made of conventional heat-cured acrylic resin and group II, patients received maxillary CAD/CAM complete denture and mandibular conventional complete denture. Assessment of the microbial colonization of maxillary dentures for both groups was carried out after 3, 6 and 9 months after denture insertion. The tested microorganisms are Candida albicans (C. albicans), Staphylococcus aureus (S. aureus), Streptococcus mutans (S. mutans) and Escherichia coli (E. coli). results: Comparison of microbial colonization count represented in colony forming unit per ml (CFU/ml). Change between group I and group II revealed that, group II has statistically significant lower CFU/ml than group I for all the tested microorganisms during the study period (P-value <0.05) except for E. coli after 3 months the difference between both groups was statistically non significant (p = 0.139). And there was a gradual increase in the microbial count during the time of using both types of dentures. Conclusion: CAD/CAM dentures showed less microbial colonization than conventional heat cure acrylic resin dentures. Further short-term and long-term clinical studies are needed to validate CAD/CAM technology in complete denture prosthodontics. IntroduCtIon Poor oral health can adversely affect the mental, social, physical and general systemic health of denture wearers (1). The condition of oral and denture hygiene is very important in controlling microorganisms

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confidence: 99%

“…However, it also has disadvantages due to remains of un-reacted monomer. This residual monomer produces toxicity and low mechanical properties and residual monomer leakage may appear, followed by generation of fissures and additional structural damage of denture base which become a point of entry for various micro-organisms (10,11) .…”

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confidence: 99%

Assessment of Microbial Adherence on Conventional and CAD/CAM Complete Denture

Kholief

Kabeel

2019

ADJ-for Girls

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“…indicates that the mono-adducts are the predominant products and they are still present at long reaction times, which appears quite remarkable considering that all reactions were carried out at 50°C. Indeed, the product (AB) 4 -PEA (m/z = 1107.6) is still present after 456 min.…”

Section: Full Paper Ascwiley-vchdementioning

confidence: 99%

“…The trans configuration allows, in all cases, for the placing of both substituents in equatorial positions (5,6). The cis configuration has one bond in equatorial and the other in axial position (3,4). Therefore, the cis isomer acylated by one C f and one C s has two possible conformers.…”

Section: Enzymatic Synthesis Of Poly (14-cyclohexanedimethanol Itacomentioning

confidence: 99%

Functionalization of Enzymatically Synthesized Rigid Poly(itaconate)s via Post‐Polymerization Aza‐Michael Addition of Primary Amines

et al. 2019

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The bulky 1,4-cyclohexanedimethanol was used as co-monomer for introducing rigidity in lipase synthetized poly(itaconate)s. Poly(1,4-cyclohexanedimethanol itaconate) was synthetized on a 14 g scale at 50°C, under solvent-free conditions and 70 mbar using only 135 Units of lipase B from Candida antarctica per gram of monomer. The mild conditions preserved the labile vinyl group of itaconic acid and avoided the decomposition of 1,4-cyclohexanedimethanol, both observed in chemical polycondensations. Experimental and computational data show that the enzymatic polycondensation proceeds despite the low reactivity of C 1 of itaconic acid. The rigid poly(1,4-cyclohexanedimethanol itaconate) was investigated in the context of aza-Michael addition of hexamethylenediamine and 2-phenylethylamine to the vinyl moiety. The enzymatically synthesized linear poly(1,4-butylene itaconate) was studied as a comparison. The two oligoesters (Molecular Weights ranging from 720 to 2859 g mol À 1 ) reacted on a gram scale, at 40-50°C, at atmospheric pressure and in solvent-free conditions. The addition of primary amines led to amine-functionalized oligoesters but also to chain degradation, and the reactivity of the poly(itaconate)s was influenced by the rigidity of the polymer chain. Upon the formation of the secondary amine adduct, the linear poly(1,4-butylene itaconate) undergoes fast intramolecular cyclization and subsequent degradation via pyrrolidone formation, especially in the presence of hexamethylenediamine. On the contrary, the bulky 1,4-cyclohexanedimethanol confers rigidity to poly(1,4-cyclohexanedimethanol itaconate), which hampers the intramolecular cyclization. Also, the bulkiness of the amine and the use of solvent emerged as factors that affect the reactivity of poly(itaconate)s. Therefore, the possibility to insert discrete units of itaconic acid in oligoesters using biocatalysts under solvent-free mild conditions opens new routes for the generation of bio-based functional polymers or amine-triggered degradable materials, as a function of the rigidity of the polyester chain.

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“…Still bearing in mind far less toxicity of itaconates compared with MMA the obtained materials were far less toxic compared with commercial PMMA denture base materials. Addition of the itaconate to the PMMA reduces the residual monomer content, but the resulting copolymer is weaker than the pure PMMA . Thus, it is of importance to find a way to improve mechanical properties of itaconate base dental materials.…”

Section: Introductionmentioning

confidence: 99%

Dimethyl Itaconate Modified PMMA ‐ Alumina Fillers Composites With Improved Mechanical Properties

et al. 2018

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PMMA poly(methyl methacrylate) has a large spectrum of uses as bone cements, in dentistry as denture base materials and other industrial applications. One of the main drawbacks of these materials is the residual monomer that is proven allergen and irritant. It was shown that addition of dimethyl itaconate (DMI) to the PMMA denture base systems decrease the quantity of residual monomer but, also deteriorate mechanical properties. The addition of alumina fillers in the PMMA/DMI produced composite materials results in improved mechanical properties compared with pure PMMA and additionally reduces the level of residual monomer in the composition. POLYM. COMPOS., 40:1691–1701, 2019. © 2018 Society of Plastics Engineers

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The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate

Cited by 43 publications

References 30 publications

Assessment of Microbial Adherence on Conventional and CAD/CAM Complete Denture

Assessment of Microbial Adherence on Conventional and CAD/CAM Complete Denture

Functionalization of Enzymatically Synthesized Rigid Poly(itaconate)s via Post‐Polymerization Aza‐Michael Addition of Primary Amines

Dimethyl Itaconate Modified PMMA ‐ Alumina Fillers Composites With Improved Mechanical Properties

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