Mechanical properties and fracture behavior of flowable fiber reinforced composite restorations

Lassila, Lippo; Keulemans, Filip; Säilynoja, Eija; Vallittu, Pekka K.; Garoushi, Sufyan

doi:10.1016/j.dental.2018.01.002

Cited by 95 publications

(110 citation statements)

References 31 publications

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“…This should be due to the higher reinforcing effect of discontinuous fiber fraction of Exp-SFRC2, which still can compensate the slight decrease in DC% and light penetration of the material. This is in accordance with Lassila et al and Shouha et al studies, which showed superior fracture toughness and flexural properties of discontinuous E-glass fiber reinforced flowable resin composite compared to conventional particulate filler resin composites 8,27) . Reinforcing effect of the fiber fillers is based on stress transfer from polymer matrix to fibers but also behavior of individual fiber as a crack stopper.…”

Section: Discussionsupporting

confidence: 92%

“…1 and 2). The mechanical properties of Exp-SFRC are significantly influenced by resin matrix composition and quantity of fibers 8,10) . Decreasing the DC% and light penetration in resin matrix can decrease cross-linking density of cured resin composite, leading to decrease of mechanical properties 22) .…”

Section: Discussionmentioning

confidence: 99%

“…A material which has high fracture toughness has the ability to better resist crack initiation and propagation. Consequently, the property of fracture toughness and flexural strength become important criterions in a dental materials' longevity 7,8) .…”

Section: Introductionmentioning

confidence: 99%

“…Several former approaches dealt with incorporation of ceramic particle reinforced (random orientation), whisker (single or multi-layer) or fiber reinforced (continuous or discontinuous fibers in various orientations) [9][10][11] . Recently, a new experimental discontinuous fiber-reinforced flowable composite (SFRC) was introduced as a restorative resin composite 8) . It consists of a combination of a resin matrix, randomly orientated E-glass fiber and inorganic particulate fillers.…”

Section: Introductionmentioning

confidence: 99%

“…It consists of a combination of a resin matrix, randomly orientated E-glass fiber and inorganic particulate fillers. This resin composite was reported to exhibit improved mechanical properties regarding flexural strength and fracture toughness and showed more favorable (repairable) type of failure behavior in comparison to particulate filler composite 8) . Ideally, the restorative resin composites should present, among other properties, sufficient radiopacity, to be distinguished from the adjacent anatomical structures, such as dentine and enamel 12) .…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties and radiopacity of flowable fiber-reinforced composite

2019

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The aim was to evaluate the effect of different zirconia discontinuous fiber fractions on radiopacity and other selected properties of glass discontinuous fiber-reinforced flowable composite (Exp-SFRC). Exp-SFRC was prepared by mixing 30 wt% of resin-matrix and 45 wt% of particulate-fillers to 25 wt% of various weight-fractions of E-glass/zirconia discontinuous fiber-fillers (25:0, 20:5, 15:10, 10:15, 0:25 wt%). Flexural strength and fracture toughness were determined for each experimental material. Radiograph of each Exp-SFRC and aluminium step wedge were taken to determine the radiopacity. Degree of conversion and light-transmission were also measured. Scanning electron microscopy was used to evaluate the microstructure of the Exp-SFRC. Analysis of variance (ANOVA) revealed that fractions of E-glass/zirconia discontinuous fiber-fillers had significant effect (p<0.05) on radiopacity and other tested properties of the Exp-SFRCs. Replacing low fraction of E-glass fiber with zirconia fiber-fillers can increase the radiopacity of the fiberreinforced composite without deteriorating the mechanical properties, although, degree of conversion was decreased.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical properties and radiopacity of flowable fiber-reinforced composite

2019

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Short Fiber Based Filling Composites

Garoushi

Keulemans

Lassila

et al. 2023

Bulk Fill Resin Composites in Dentistry

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Fracture resistance and marginal gap formation of post-core restorations: influence of different fiber-reinforced composites

Fráter

Lassila

Braunitzer³

et al. 2019

Clin Oral Invest

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Objectives The aim was to explore the fracture behavior and marginal gap within the root canal of endodontically treated (ET) premolars restored with different fiber-reinforced post-core composites (FRCs). Further aim was to evaluate the composite curing at different depths in the canal. Materials and methods Eighty-seven intact upper premolars were collected and randomly divided into six groups. After endodontic procedure, standard MOD cavities were prepared and restored with their respective fiber-reinforced post-core materials: group 1: prefabricated unidirectional FRC-post + conventional composite core; group 2: prefabricated unidirectional FRC-post + short fiber composite (SFRC) core; group 3: individually formed unidirectional FRC-post + conventional composite core; group 4: randomly oriented SFRC directly layered as post and core; group 5: individually formed unidirectional FRC + randomly oriented SFRC as post and core. After restorations were completed, teeth (n = 3/group) were sectioned and then stained. Specimens were viewed under a stereo microscope and the percentage of microgaps within the root canal was calculated. Fracture load was measured using universal testing machine. Results SFRC application in the root canal (groups 4 and 5) showed significantly higher fracture load (876.7 N) compared to the other tested groups (512-613 N) (p < 0.05). Post/core restorations made from prefabricated FRC-post (group 1) exhibited the highest number of microgaps (35.1%) at the examined interphase in the root canal. Conclusions The restoration of ET premolars with the use of SFRC as post-core material displayed promising performance in matter of microgap and load-bearing capacity. Clinical significance Fracture resistance of ET premolar restored by bilayered composite restoration that includes both SFRC as post-core material and surface conventional resin seems to be beneficial.

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Mechanical properties and fracture behavior of flowable fiber reinforced composite restorations

Cited by 95 publications

References 31 publications

Mechanical properties and radiopacity of flowable fiber-reinforced composite

Mechanical properties and radiopacity of flowable fiber-reinforced composite

Short Fiber Based Filling Composites

Fracture resistance and marginal gap formation of post-core restorations: influence of different fiber-reinforced composites

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