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

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Pavle Spasojevic ◽  
Milorad Zrilic ◽  
Vesna Panic ◽  
Dragoslav Stamenkovic ◽  
Sanja Seslija ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Surface Hardness ◽  
Base Material ◽  
Dynamic Mechanical Properties ◽  
Denture Base ◽  
Mean Values ◽  
Poly Methyl Methacrylate ◽  
Base Materials ◽  
Wide Range

This study investigates a wide range of clinically relevant mechanical properties of poly(methyl methacrylate) (PMMA) denture base materials modified with di-methyl itaconate (DMI) and di-n-butyl itaconate (DBI) in order to compare them to a commercial PMMA denture base material. The commercial denture base formulation was modified with DMI and DBI by replacing up to 10 wt% of methyl methacrylate (MMA) monomer. The specimens were prepared by standard bath curing process. The influence of the itaconate content on hardness, impact strength, tensile, and thermal and dynamic mechanical properties was investigated. It is found that the addition of di-n-alkyl itaconates gives homogenous blends that show decreased glass transition temperature, as well as decrease in storage modulus, ultimate tensile strength, and impact fracture resistance with increase in the itaconate content. The mean values of surface hardness show no significant change with the addition of itaconates. The magnitude of the measured values indicates that the poly(methyl methacrylate) (PMMA) denture base material modified with itaconates could be developed into a less toxic, more environmentally and patient friendly product than commercial pure PMMA denture base material.

scholarly journals Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties

2015 ◽  
Vol 80 (9) ◽  
pp. 1177-1192 ◽  
Author(s):  
Pavle Spasojevic ◽  
Vesna Panic ◽  
Sanja Seslija ◽  
Vladimir Nikolic ◽  
Ivanka Popovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Itaconic Acid ◽  
Sem Analysis ◽  
Denture Base ◽  
Elongation At Break ◽  
Poly Methyl Methacrylate ◽  
Base Materials ◽  
Monomer Content ◽  
Acid Esters

The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain material with less toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plants. Commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), wherein the ratio of DTHFI was varied from 2.5 to 10% by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effect of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) was investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, what made these materials less toxic. It was shown that the increase in DTHFI content gave materials with decreased glass transition temperature, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance, however mechanical properties were in the rang prescribed by ADA standards, and can be used in practice. The deterioration of mechanical properties was therefore worth losing in order to gain lesser toxicity of the leached monomer.

scholarly journals Mechanical Properties of Surface-Charged Poly(Methyl Methacrylate) as Denture Resins

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Sang E. Park ◽  
Maggie Chao ◽  
P. A. Raj
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Methacrylic Acid ◽  
Acid Content ◽  
Testing Machine ◽  
Base Material ◽  
Strain History ◽  
Dental Resin ◽  
Denture Base ◽  
Poly Methyl Methacrylate

The aim of this study was to examine the mechanical properties of a new surface-modified denture resin for its suitability as denture base material. This experimental resin is made by copolymerization of methacrylic acid (MA) to poly(methyl methacrylate) (PMMA) to produce a negative charge. Four experimental groups consisted of Orthodontic Dental Resin (DENTSPLY Caulk) as a control and three groups of modified PMMA (mPMMA) produced at differing ratios of methacrylic acid (5 : 95, 10 : 90, and 20 : 80 MA : MMA). A 3-point flexural test using the Instron Universal Testing Machine (Instron Corp.) measured force-deflection curves and a complete stress versus strain history to calculate the transverse strength, transverse deflection, flexural strength, and modulus of elasticity. Analysis of Variance and Scheffe Post-test were performed on the data. Resins with increased methacrylic acid content exhibited lower strength values for the measured physical properties. The most significant decrease occurred as the methacrylic acid content was increased to 20%mPMMA. No significant differences atP<.05were found in all parameters tested between the Control and 5%mPMMA.

Effect of rigid rod polymer filler on mechanical properties of poly-methyl methacrylate denture base material

2008 ◽  
Vol 24 (5) ◽  
pp. 708-713 ◽  
Author(s):  
Anne-Maria Vuorinen ◽  
Scott R. Dyer ◽  
Lippo V.J. Lassila ◽  
Pekka K. Vallittu
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Base Material ◽  
Denture Base ◽  
Poly Methyl Methacrylate ◽  
Polymer Filler ◽  
Rigid Rod

scholarly journals Denture base adaptation, retention, and mechanical properties of BioHPP versus nano-alumina-modified polyamide resins

2021 ◽  
Vol 15 (4) ◽  
pp. 239-246
Author(s):  
Radwa Mohsen Kamal Emera ◽  
Reham Mohammed Abdallah
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Surface Hardness ◽  
Base Material ◽  
Alumina Nanoparticles ◽  
Control Group ◽  
Denture Base ◽  
Promising Alternative ◽  
Base Materials ◽  
Group I

Background. Continuous development of denture base materials has led to the introduction of innovative alternatives to polymethyl methacrylate. The present study aimed to evaluate the mechanical properties, adaptation, and retention of alumina nanoparticles (Al2 O3 NPs) modified polyamide resin versus BioHPP (high-performance polymer) denture base materials. Methods. Four groups of specimens, one control (group I) (unmodified polyamide) and two groups (groups II and III) (2.5 and 5 wt% Al2 O3 NP-modified polyamide, respectively) versus BioHPP specimen group (group IV), were tested for surface microhardness and flexural strength. Complete dentures fabricated from 5 wt% Al2 O3 NP-modified polyamide resin and BioHPP were used to evaluate denture base adaptation and retention. Results. The higher concentration in the alumina NP-modified polyamide group (5 wt%) demonstrated significantly higher flexural strength values and insignificantly higher hardness values than the lower concentration (2.5 wt%). There was a significant increase in the BioHPP group in both flexural strength and surface hardness compared to all polyamide groups. A statistically insignificant difference was observed between the two denture base materials regarding mean misfit values of the calculated total tissue surface area and four of the total seven evaluated areas. Satisfactory and comparable retention values were observed for both denture base materials. Conclusion. BioHPP and Al2 O3 NP-modified polyamide resin could be used as a promising alternative denture base material with good adaptation, retention, and mechanical properties.

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