Physical and mechanical characterisation of flowable dental composites reinforced with short aspect ratio micro-sized S-Glass fibres

Behl, Sonam; Raju, Raju; Rajan, Ginu; Ellakwa, Ayman; Farrar, Paul; Prusty, B. Gangadhara

doi:10.1016/j.msec.2020.110771

Cited by 21 publications

(14 citation statements)

References 48 publications

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“…It has also been established that volumetric shrinkage is directly proportional to the elastic modulus of the material 44,47 where the increase in modulus is attributed towards the large particle size of fibres which improves the load-carrying capacity and toughness of the structure. Behl et al 9 in their study had reported that the flexure moduli for the three groups tested in this study were 5.29 GPa, 6.47 GPa and 6.17 GPa. A similar trend was observed in the current study where volumetric shrinkage varied in proportional to the flexure modulus 9 which increased for groups B and C. Both the volumetric shrinkage and flexure modulus were high for Gr-B and Gr-C; however, no statistically significant difference was observed in the groups between 50AR (Gr-B) and 70AR (Gr-C) fibres (p < 0.05).…”

Section: Discussionsupporting

confidence: 50%

“…The effectiveness of surface etching, random orientation www.nature.com/scientificreports/ and uniform distribution were also evaluated where the interfacial shear strength measured by microdroplet pull-out study was enhanced by 39.6% 34,42 . With the replacement of 5 wt% glass particles with glass fibres (50AR and 70AR), the flexure strength and flexure modulus increased 22.3% and 9.7% respectively, compared to the filler only group 9 . The current study focused on the physical properties characterisation of these three groups based on the glass fibre surface treatment by Cho et al 34 .…”

Section: Discussionmentioning

confidence: 97%

“…Large dimensional variation of the restorative composite due to external/internal/curing kinetics conditions could lead to debonding of the restoration, microleakage and restoration failure. Several studies 1,9,10,31,33,40,41 have analysed the effect of a small volume of short fibres on mechanical and physical properties along with particulate fillers or addition of fibres to commercial composites. The effectiveness of surface etching, random orientation www.nature.com/scientificreports/ and uniform distribution were also evaluated where the interfacial shear strength measured by microdroplet pull-out study was enhanced by 39.6% 34,42 .…”

Section: Discussionmentioning

confidence: 99%

“…Flowable composites with higher resin content relatively have high volumetric shrinkage and low shrinkage stresses. It is known from many studies that the elastic modulus increases with the addition or replacement of a small volume of fibres 1,9,45,46 . It has also been established that volumetric shrinkage is directly proportional to the elastic modulus of the material 44,47 where the increase in modulus is attributed towards the large particle size of fibres which improves the load-carrying capacity and toughness of the structure.…”

Section: Discussionmentioning

confidence: 99%

“…However, the effect of replacing a small number of glass fillers with glass fibres with the same resin system on the physical properties has not been attempted. Recently, based on optimisation of fibre length and weight fraction through mechanical characterisation, new experimental flowable short S-Glass fibre reinforced dental composites were introduced 9 . Therefore, this study is aimed at investigating the effects of replacing 5 wt% fillers with 5 wt% short S-Glass fibres with two aspect ratios on the dimensional stability of flowable dental composites.…”

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Dimensional stability of short fibre reinforced flowable dental composites

Raju

Rajan

Farrar³

et al. 2021

Sci Rep

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Fibre-reinforced dental composites are proven to have superior mechanical properties in comparison with micro/nano/hybrid filled composites. However, the addition of small quantities of short glass fibres could affect the dimensional stability of the restoration both during initial stages as well as through the life of the restoration. This in-vitro study aims at evaluating the physical properties of short S-Glass reinforced flowable dental composites. Two S-Glass short fibre-particulate reinforced (5 wt% of aspect ratios 50 and 70) and one particulate only reinforced flowable dental composites were prepared with UDMA-TEGDMA based dental monomer systems. Samples were photopolymersied for 60 s and stored in distilled water at 37 °C for 24 h before testing. Depth of cure (through-thickness microhardness), volumetric shrinkage (Archimedes technique), polymerisation stress (cantilever based tensometer), curing exotherm (thermocouple), water sorption and solubility (ISO 4049) and thermal expansion coefficient (dilatometer) were determined. The test results were statistically analysed using one-way ANOVA (p < 0.05). Depth of cure increased by 41%, volumetric shrinkage increased by 8.3%, shrinkage stress increased by 37.6%, exotherm increased by 20.2%, and thermal expansion reduced by 6.4% while water sorption and solubility had a negligible effect with the inclusion of short glass fibres. The study demonstrates that within the same organic resin system and quantity, a small replacement of fillers with short fibres could significantly affect the dimensional stability of the composite system. In conjunction with mechanical properties, this study could help clinicians to gain confidence in fibre reinforced dental composite restorative system.

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Section: Discussionsupporting

confidence: 50%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Dimensional stability of short fibre reinforced flowable dental composites

Raju

Rajan

Farrar³

et al. 2021

Sci Rep

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Dental composite resin: a review of major mechanical properties, measurements and its influencing factors

Suryawanshi

2022

Materialwissenschaft Werkst

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Nowadays, there is a large variety of dental restorative composite materials on the market, making it difficult to select the proper one. The mechanical properties of various dental materials determine how long they endure when used in the mouth. On the other hand, the therapeutic efficiency of these restorative materials cannot be predicted solely based on their mechanical properties. These features, on the other hand, help with the examination of the impact of changes in their composition. As a consequence, these tests can help the clinician choose the right material. The various mechanical properties can be investigated using a variety of laboratory experiments. The common laboratory tests used to evaluate the mechanical characteristics, composition, and classification of dental composite materials, as well as the factors that influence mechanical qualities, are discussed in this study.

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An experimental investigation on impact dynamics response of woven roved glass fiber reinforced polyester laminated composites

Balasubramani¹,

Boopathy

Stalin

et al. 2022

Polymer Composites

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This research deals with the effect of stacking sequence over, the mechanical behavior of laminates that includes tensile, flexural, fractography, area of impact damage, and residual tensile strength. The angle‐ply laminate specimens were analyzed theoretically and correlated with experimental results. The highest interlaminar shear strength 32.89 MPa was exhibited by (60/30/60/30)S with better transverse stiffness of 444 N/mm. Among the developed laminates, (60/30/60/30)S showed the highest rate of residual strength degradation of 0.271. It has been found that an increase in interlaminar shear strength decreases the impact damage resistance of the composites. The angle‐ply laminate composites exhibited superior residual tensile and impact resistant properties when compared with uniply laminate composites.

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Physical and mechanical characterisation of flowable dental composites reinforced with short aspect ratio micro-sized S-Glass fibres

Cited by 21 publications

References 48 publications

Dimensional stability of short fibre reinforced flowable dental composites

Dimensional stability of short fibre reinforced flowable dental composites

Dental composite resin: a review of major mechanical properties, measurements and its influencing factors

An experimental investigation on impact dynamics response of woven roved glass fiber reinforced polyester laminated composites

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