Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Kundie, Fathie; Azhari, Che Husna; Muchtar, Andanastuti; Ahmad, Zainal Arifin

doi:10.21315/jps2018.29.1.10

Cited by 136 publications

(107 citation statements)

References 66 publications

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“…In order to improve physical properties of polymers, fillers are introduced into their composition. Fillers are used in dental composites to increase strength, refractive index, and change the thermal expansion coefficient of the material [58][59][60]. An increase in filler content should reduce the shrinkage of the material following polymerization and the resulting shrinkage stress by reducing the content of the organic phase [61].…”

Section: Degradation Of Filler and Filler-matrix Interfacementioning

confidence: 99%

“…Inorganic particles occur in fragments, plates, fibers, and in spherical form, as well as in the form of fine powder. The particle size of the filler varies widely from 0.007 to 70 microns, depending on the formulation [59]. In currently used dental composites, the inorganic phase consists of silica, quartz, borosilicate, lithium aluminum silicate, barium, aluminum, and strontium aluminum or aluminum oxides.…”

Section: Degradation Of Filler and Filler-matrix Interfacementioning

confidence: 99%

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Ageing of Dental Composites Based on Methacrylate Resins—A Critical Review of the Causes and Method of Assessment

Szczesio-Włodarczyk

Sokołowski

Kleczewska³

et al. 2020

Polymers

112

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The paper reviews the environmental factors affecting ageing processes, and the degradation of resins, filler, and the filler-matrix interface. It discusses the current methods of testing materials in vitro. A review of literature was conducted with the main sources being PubMed. ScienceDirect, Mendeley, and Google Scholar were used as other resources. Studies were selected based on relevance, with a preference given to recent research. The ageing process is an inherent element of the use of resin composites in the oral environment, which is very complex and changes dynamically. The hydrolysis of dental resins is accelerated by some substances (enzymes, acids). Bonds formed between coupling agent and inorganic filler are prone to hydrolysis. Methods for prediction of long-term behaviour are not included in composite standards. Given the very complex chemical composition of the oral environment, ageing tests based on water can only provide a limited view of the clinical performance of biomaterial. Systems that can reproduce dynamic changes in stress (thermal cycling, fatigue tests) are better able to mimic clinical conditions and could be extremely valuable in predicting dental composite clinical performance. It is essential to identify procedure to determine the ageing process of dental materials.

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Section: Degradation Of Filler and Filler-matrix Interfacementioning

confidence: 99%

Section: Degradation Of Filler and Filler-matrix Interfacementioning

confidence: 99%

Ageing of Dental Composites Based on Methacrylate Resins—A Critical Review of the Causes and Method of Assessment

Szczesio-Włodarczyk

Sokołowski

Kleczewska³

et al. 2020

Polymers

112

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“…It has been established that there is a positive correlation between the hardness and inorganic filler loading in the resin matrix which means that composites with higher filler loading exhibit higher surface hardness [52]. According to Kundie et al [53], the filler loading is one of few factors that are related surface hardness of the material and affecting strongly the composite. Since synthetic HA has hardness similar to that of natural teeth, the incorporation of HA in the dental composite would improve the hardness of the composite [54].…”

Section: Surface Hardness (Vickers Hardness Vhn)mentioning

confidence: 99%

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Aldabib¹,

Ishak

2020

SN Appl. Sci.

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Poly (methyl methacrylate) or PMMA is an acrylic material has been used widely as a denture base material. The denture base is subjected to various stresses during the function, these include tensile and flexural stresses. The current study was aimed to experimentally evaluate the effect of different filler concentrations on physical and mechanical characteristics of PMMA/HA composite. PMMA reinforced with different ratios (i.e. 0, 5, 10, and 15 wt%) of silane treated HA were prepared to study the effect of HA concentration on the mechanical properties of acrylic denture base material. Tensile, flexural and fracture toughness tests were conducted to evaluate the mechanical performance. The fracture surfaces of all the composites were studied using scanning electron microscopy. The hardness of the composite was investigated using Vickers hardness. Independent t-test was also conducted to evaluate the significant difference in the values measured as a function of different filler loading. Data analyses showed a significant improvement (P < 0.05) in the tensile and flexural modulus of the composite 26% and 27.3% respectively, as a result of increasing the HA loading to 15 wt%. However, no significant difference (P > 0.05) was detected in the tensile and flexural strength as function of HA incorporation. A small increment of only 1.63% and 3% in the tensile and flexural strength respectively, was achieved at very low filler loading i.e. 5 wt%. An improvement of only 7.8% in the surface hardness was observed for PMMA loaded with 15 wt% of HA.

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“…Higher solubility values were found for the reinforced resins, excepting P1 sample in saliva, which showed a decrease. The higher solubility of the reinforced resins can be explained by the effect of fillers addition to PMMA, that decreases the degree of conversion and consecutive increases the amount of unreacted monomer [4], as the solubility is directly related to residual monomer releasing. Solvent's diffusion in the matrix can also lead to polymer dissolution and dispersion of the particles into the solvent.…”

Section: Resultsmentioning

confidence: 99%

“…Since PMMA resins are relatively brittle materials and they are subjected to high mastication forces or sometimes to accidental drops, several attempts have been made to improve its mechanical properties by adding fillers of different type and sizes [3]. Inorganic nanofillers have a large surface area which determines a high surface energy at the interface of polymer matrix, improving flexural strength; they improve hardness due to their rigidity and higher stiffness than the matrix [4] and the fracture toughness as well, because of the more uniform distribution compared to micro fillers [5]. Addition of silver nanoparticles to PMMA has several favorable effects: antimicrobial activity, increased monomer conversion, increased flexural strength and elastic modulus, improved thermal stability [6].…”

Section: Introductionmentioning

confidence: 99%

Solubility, ductility and resilience of a PMMA denture resin with graphene and silver nanoparticles addition

Bacali¹,

Buduru²,

Năstase³

et al. 2019

Studia UBB Chemia

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PMMA denture base materials are used for several decades without significant improvements in their composition. The addition of different fillers has been proved to improve some of the acrylic resin's characteristics. Recent studies focused on enhancing PMMA properties using nanoparticles. In our study we assessed the effect of adding graphene and silver nanoparticles on the solubility, ductility and resilience of a commercial denture base acrylic resin.

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Effects of Filler Size on the Mechanical Properties of Polymer-filled Dental Composites: A Review of Recent Developments

Abstract: To cite this article: Kundie, F. et al. (2018). Effects of filler size on the mechanical properties of polymer-filled dental composites: A review of recent developments.

Cited by 136 publications

References 66 publications

Ageing of Dental Composites Based on Methacrylate Resins—A Critical Review of the Causes and Method of Assessment

Ageing of Dental Composites Based on Methacrylate Resins—A Critical Review of the Causes and Method of Assessment

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Solubility, ductility and resilience of a PMMA denture resin with graphene and silver nanoparticles addition

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