A Comparative Evaluation of Flexural Strength of Commercially Available Acrylic and Modified Polymethylmethacrylate: An in vitro Study

Jain, Teerthesh; Yadav, Naveen; Pandita, Amrita; Feroz, S M A; Kartika, UK; Singh, Praval Pratap

doi:10.5005/jp-journals-10024-1275

Cited by 3 publications

(6 citation statements)

References 14 publications

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“…From the included researches in the systematic review, the modification of MMA was done basically by certain monomers or solutions that can be categorized as fluoromonomers[2627282930] ( n = 5), phosphate monomers[313233] ( n = 3), methacrylic acid monomer[343536373839] ( n = 6), itaconate monomers[404142] ( n = 3), nitromonomers[543444546] ( n = 5), and nonspecific monomers or solutions ( n = 6). Nonspecific monomers include Norbonyl/phenyl methacrylate (NBMA/PHMA),[47] polyhedral oligosilsesquioxane (POSS),[48] methacrylated dendrimer (DD1),[49] 1,3-bis(3-methacryloxypropyl)-1,1,3,3 tetramethyl disiloxane (BMPMS),[50] silver nitrate (AgNO 3 ) solution,[51] and N -acetyl cysteine (NAC).…”

Section: Resultsmentioning

confidence: 99%

“…The monomers used to substitute with MMA (wt/vol%) were either experimentally synthesized[33424445474951] or purchased. [526272829303234353637383940414346485052] For the specimen preparation, the polymer beads were synthesized by bulk polymerization,[29474950] suspension polymerization,[2627283334] or from the commercially available pre-polymers. The commercially available pre-polymers used were Lucitone 550,[30354345] Lucitone 199,[3132] Paladent 20,[48] Trevalon,[36] Vertex,[3744] DPI,[3839] Ondacryl,[5] Ivoclar Vivadent,[51] Biocryl,[404142] QC-20, Acron MC,[46] and Uniffasttrad.…”

Section: Resultsmentioning

confidence: 99%

“…[526272829303234353637383940414346485052] For the specimen preparation, the polymer beads were synthesized by bulk polymerization,[29474950] suspension polymerization,[2627283334] or from the commercially available pre-polymers. The commercially available pre-polymers used were Lucitone 550,[30354345] Lucitone 199,[3132] Paladent 20,[48] Trevalon,[36] Vertex,[3744] DPI,[3839] Ondacryl,[5] Ivoclar Vivadent,[51] Biocryl,[404142] QC-20, Acron MC,[46] and Uniffasttrad. [52] Researches included in this review, based upon the polymerization process, used heat-cured PMMA resin,[2930313235363738394041424344454647485051] autopolymerizing resin,[26272833344952] and microwave irradiation.…”

Section: Resultsmentioning

confidence: 99%

“…The commercially available pre-polymers used were Lucitone 550,[30354345] Lucitone 199,[3132] Paladent 20,[48] Trevalon,[36] Vertex,[3744] DPI,[3839] Ondacryl,[5] Ivoclar Vivadent,[51] Biocryl,[404142] QC-20, Acron MC,[46] and Uniffasttrad. [52] Researches included in this review, based upon the polymerization process, used heat-cured PMMA resin,[2930313235363738394041424344454647485051] autopolymerizing resin,[26272833344952] and microwave irradiation. [546]…”

Section: Resultsmentioning

confidence: 99%

“…The most commonly executed wt/vol% of substituted monomer were 10%[29303132333435373940414244464750] and 20%. [293031323334353638394647]…”

Section: Resultsmentioning

confidence: 99%

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Monomer modifications of denture base acrylic resin: A systematic review and meta-analysis

2019

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Background: Methyl methacrylate monomer of denture base resins was modified with several monomers to achieve better physico-mechanical properties without compromising the biocompatibility. However, there are no consensuses on the best strategy to achieve best modified monomer. Purpose: To identify and evaluate the differences in the properties between conventional and modified monomers and to verify the influence of several variables on the properties of denture base acrylic resin. Materials and Methods: This study was executed by following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. In-vitro studies that investigated the properties of conventional and modified monomers were selected. Searches were carried out in the Ebscohost, PubMed, Semantic scholar and J-stage databases. The search commenced from the year 1995 and the last search was done till November 2018. A comparison was performed between modified and unmodified monomers. The analyses were carried out using fixed-effect models. Results: The meta-analysis results showed high heterogeneity in all aspects, and higher flexural strength for monomers modified with 20% methacrylic acid. Conclusion: Although the articles included in this meta-analysis showed high heterogeneity and high risk of bias, the in-vitro literature seems to suggest that use of modified monomers could improve the properties of denture base resins. Other variants of monomer modifications and their tested parameters were discussed in this systematic review as well. Dimensional accuracy is an unexplored variable to be evaluated extensively in the future researches.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The most commonly executed wt/vol% of substituted monomer were 10%[29303132333435373940414244464750] and 20%. [293031323334353638394647]…”

Section: Resultsmentioning

confidence: 99%

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Monomer modifications of denture base acrylic resin: A systematic review and meta-analysis

2019

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Effect of E-Glass Fiber Addition on Mechanical Properties of Heat-Polymerized Acrylic Resin Denture Base

Yuliharsini¹,

Nasution²,

Agusnar³

et al. 2019

jemds

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BACKGROUND Heat-polymerized acrylic resins are commonly used as denture base, but they have relatively low mechanical properties such as impact strength, transverse strength, and modulus of elasticity that made them susceptible to fracture during clinical application. Various modifications were made to improve the mechanical properties of heat-polymerized acrylic resins, one of them was with the addition of E-glass fiber. We wanted to determine the effect of E-glass fiber (chopped strands of 3 mm size) with 1% and 1.5% weight concentration addition on mechanical properties (impact strength, transverse strength, and modulus of elasticity) of heatpolymerized acrylic resin denture base material and the correlation between them. MATERIALS AND METHODS Ninety samples of heat-polymerized acrylic resin were divided into 9 groups, consisting of impact strength, transverse strength and modulus of elasticity testing group. Each testing group consisting of group without and with addition of 1% and 1.5% E-glass fiber. Impact strength test was performed using Charpy impact tester, while transverse strength and modulus of elasticity were performed using the Universal Testing Machine. After the test, fracture surface of the samples was evaluated and scanning electron microscope view was taken. The effect of E-glass fiber addition to impact, transverse strength and modulus of elasticity on heatpolymerized acrylic resin was analysed with one-way ANOVA statistical test. Pearson Correlation test was then performed to determine the correlation between impact, transverse strength and modulus of elasticity. RESULTS There was an effect of E-glass fiber addition (chopped strands of 3 mm size) with 1% and 1.5% weight concentration to impact strength p=0.0001 (p<0,05); transverse strength p=0,002 (p<0,05); and modulus of elasticity p=0.002 (p<0.05). Pearson Correlation test showed that there was no correlation between impact and transverse strength (r=0.311 and p=0.094) (p>0.05); impact strength and modulus of elasticity (r=0.284 and p=0.128) (p>0.05); and transverse strength with modulus of elasticity (r=-0.044 and p=0.816) (p>0.05). CONCLUSION Addition of 1% and 1.5% E-glass fiber can improve the impact strength, transverse strength, and modulus of elasticity of heatpolymerized acrylic resin denture base and the addition of 1% E-glass fiber can increase a balanced of impact strength, transverse strength, and modulus of elasticity of heat-polymerized acrylic resin denture base.

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A study to compare adhered oral flora to soft liner and conventional denture base surface in complete denture patients

Elawady¹,

Mohamed

Nassif³

2019

Egyptian Dental Journal

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Background: Denture base materials are subjected to sorption, a process of absorption and adsorption of liquids depending on the environmental conditions, also their fitting surface is subjected to microbial adhesion due to surface irregularities. Soft silicon liners are usually used with removable appliances to decrease load concentration on the hard and soft tissues. Silicon liners also undergo fluid sorption and microbial adhesion. Aim: This study was carried out to assess the effect of standardizing the oral hygiene conditions on the microbial load difference between conventional acrylic denture bases and silicon soft relining material (Mucopren soft) used to reline mandibular complete dentures in atrophied mandibles. Methods: Conventional complete dentures were constructed for 25 patients with flat atrophic mandibular ridges to be used for two weeks, salivary swabs were collected to evaluate oral flora attached on the fitting surface of the denture base and the buccal vestibule, soft liner was applied for all patients mandibular denture surfaces and the same approach was repeated after two weeks of the liner use. Results: Microbial load was found to be significantly higher in the fitting surfaces of the silicon soft liner, than in the conventional acrylic base fitting surfaces. Conclusion: Even under controlled oral conditions, Mucopren soft silicon liner incorporates greater microbial load than acrylic material thus, subjecting patients to numerous infections.

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A Comparative Evaluation of Flexural Strength of Commercially Available Acrylic and Modified Polymethylmethacrylate: An in vitro Study

Cited by 3 publications

References 14 publications

Monomer modifications of denture base acrylic resin: A systematic review and meta-analysis

Monomer modifications of denture base acrylic resin: A systematic review and meta-analysis

Effect of E-Glass Fiber Addition on Mechanical Properties of Heat-Polymerized Acrylic Resin Denture Base

A study to compare adhered oral flora to soft liner and conventional denture base surface in complete denture patients

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