Color stability of nanocrystallite-treated and silicate-treated fillers of calcium phosphate composite resin: An in vitro study

Chen, Wen Cheng; Wu, Hui Yu

doi:10.1016/j.prosdent.2013.08.010

Cited by 7 publications

(7 citation statements)

References 35 publications

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“…Nanocrystal formation behavior was determined during the monitored treatment according to previous studies (Chen et al, 2013b;Chen and Wu, 2014). Briefly, 5 g of DCPA powder was mixed in 40 mL solution with a constant calcium-to-phosphate atomic ratio of 2.0 and a pH of 5.0 for 20 min at room temperature.…”

Section: Preparation Of Composite Resinsmentioning

confidence: 99%

“…Composite resins have replaced silver amalgams in being the dominant material used in dental fillings because it can be adjusted to fit natural teeth color (Chen and Wu, 2014). Dentists are also able to closely match the material according to the esthetics and functional needs of patients.…”

Section: Introductionmentioning

confidence: 99%

“…The current research uses technology previously developed in-house by capping a layer of nanocrystals and salinization with resin matrix to form a compound of composite resin (Chen et al, 2013b;Chen and Wu, 2014). In vitro studies have shown that reinforced fillers with treated with nanocrystals increase the mechanical strength of composite resins.…”

Section: Introductionmentioning

confidence: 99%

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Thermal cycling effects on adhesion of resin–bovine enamel junction among different composite resins

Chen

Lai

et al. 2014

Journal of the Mechanical Behavior of Biomedical Materials

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Section: Preparation Of Composite Resinsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal cycling effects on adhesion of resin–bovine enamel junction among different composite resins

Chen

Lai

et al. 2014

Journal of the Mechanical Behavior of Biomedical Materials

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“…All chemicals were obtained from Sigma Aldrich. The composition ratio of the matrix was 48.975% Bis-GMA, 48.975% TEGDMA, 1.0% DMAEMA, 1.0% CQ, and 0.05% BHT [19]. The polymer-matrix composites with TTCP whisker-treated fillers were used to form composite resins with ratios of 30, 40, 50, and 60 wt%.…”

Section: Resin Compositionsmentioning

confidence: 99%

“…One study showed that the micrometer-scale TTCP particle modification method of growing nanowhiskers on surfaces can reinforce calcium phosphate bone cement and produce improved strength when compared to nonsurfacetreated TTCP bone cement [16]. At daily conditions, teeth were thermally cycled four times at 5 ∘ C/55 ∘ C and compared with the general oral condition [17][18][19]. The elapsed time of restorative materials after 600 cycles was estimated at approximately six months and then the restoration after testing is adequately quantified.…”

Section: Introductionmentioning

confidence: 99%

Surface Modified Characteristics of the Tetracalcium Phosphate as Light-Cured Composite Resin Fillers

Chen

Shih

2014

Journal of Nanomaterials

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The objectives of this study are to characterize the properties of light-cured composite resins that are reinforced with whisker surface-modified particles of tetracalcium phosphate (TTCP) and to investigate the influence of thermal cycling on the reinforced composites properties. The characteristics of ultimate diametral tensile strength (DTS), moduli, pH values, and fracture surfaces of the samples with different amounts of surface-modified TTCP (30%–60%) were determined before and after thermal cycling between 5°C and 55°C in deionized water for 600 cycles. The trends of all groups were ductile prior to thermal cycling and the moduli of all groups increased after thermal cycling. The ductile property of the control group without filler was not significantly affected. Larger amounts of fillers caused the particles to aggregate, subsequently decreasing the resin’s ability to disperse external forces and leading to brittleness after thermal cycling. Therefore, the trend of composite resins with larger amounts of filler would become more brittle and exhibited higher moduli after thermal cycling. This developed composite resin with surface modified-TTCP fillers has the potential to be successful dental restorative materials.

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Effect of micro‐/nano‐hybrid hydroxyapatite rod reinforcement in composite resins on strength through thermal cycling

Chang

et al. 2019

Polymer Composites

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This study was based on the hypothesis that mechanical strength and ion release from bioactive restorative composites containing hydroxyapatite (HA) nanometer scale fillers lead to superior precipitation ability, which could facilitate load transfer, bridge, and toughening mechanisms. The prepared specimens included the respective composite resins with singular filler form of synthetic 50 wt% microrod HA (abbreviated as 50Mr-HA) and nanorod HA (designated as 50Nr-HA) and micro-/nanorod hybrid fillers with 50 wt% microrod HA mixing with 5 and 10 wt% nanorod HA (55 and 60 wt% fillers in composites), which were designated as 50M5Nr-HA and 50M10Nr-HA groups, respectively. The measured properties were as follows: flexural strength and re-precipitation after specimen immersion for 24 h and further exposure to thermal fatigue between 5 C and 55 C for 600 and 2,400 cycles. The groups of micro-/nanorod hybrid resins reinforced with nanorods showed a significant increase in microhardness, modulus, and the capacity to re-precipitate. The 50M5Nr-HA sample showed the highest flexural strength after thermal fatigue among the four types of fillers. The 50Nr-HA sample showed the lowest flexural bending strength and modulus. The 50Mr-HA filler showed better re-mineralization capability after immersion. However, the micro-/nanorod hybrid 50M5Nr-HA exhibited an advantage after thermal fatigue and could avoid the aggregate problem that occurred in 50Nr-HA or 50M10Nr-HA. With proper hybrid nanorods and microrod HA-reinforced composites exhibited superior potential application as for dental caries restoration.

show abstract

Color stability of nanocrystallite-treated and silicate-treated fillers of calcium phosphate composite resin: An in vitro study

Cited by 7 publications

References 35 publications

Thermal cycling effects on adhesion of resin–bovine enamel junction among different composite resins

Thermal cycling effects on adhesion of resin–bovine enamel junction among different composite resins

Surface Modified Characteristics of the Tetracalcium Phosphate as Light-Cured Composite Resin Fillers

Effect of micro‐/nano‐hybrid hydroxyapatite rod reinforcement in composite resins on strength through thermal cycling

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