Improved properties of amorphous calcium phosphate fillers in remineralizing resin composites

Škrtić, Drago; Antonucci, Joseph M.; Eanes, E. D.

doi:10.1016/s0109-5641(96)80037-6

Cited by 127 publications

(178 citation statements)

References 13 publications

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“…A 3 × 2 full factorial design was used with two levels of whisker reinforcement (DCPA:whisker mass ratio = 1:0 or no whiskers; DCPA:whisker = 1:1), and three levels of DCPA particle size (112 nm, 0.88 μm, 12.0 μm). The DCPA powders were not silanized so that the Ca and PO 4 release would not be inhibited, following previous studies on calcium phosphate composites [19,21,32]. The nano-silica-fused whiskers were silanized to provide maximum reinforcement.…”

Section: Resin Composite Fabricationmentioning

confidence: 99%

“…Hence there is a wide range of solution conditions when the precipitation of hydroxyapatite occurs spontaneously. Indeed, several bioactive composites have been developed that release calcium and phosphate ions in the presence of an aqueous solution, which then precipitate to form hydroxyapatite [18][19][20][21]. The calcium ions are conveniently referred to as Ca, and the phosphate ions as PO 4 , following previous studies [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…However, the calcium phosphate fillers do not reinforce the resin like the glass fillers. For example, a calcium phosphate composite had a flexural strength of about half of the strength of the unfilled resin [19]. Such low strengths were recognized as being "inadequate to make these composites acceptable as bulk restoratives" [20].…”

Section: Introductionmentioning

confidence: 99%

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Nanocomposites with Ca and PO4 release: Effects of reinforcement, dicalcium phosphate particle size and silanization☆

2007

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Objectives-Nano-particles of dicalcium phosphate anhydrous (DCPA) were synthesized in our laboratory for the first time and incorporated into a dental resin. Our goal was to develop a mechanically strong dental composite that has Ca and PO 4 ion release to combat tooth caries, and to investigate the effects of whisker reinforcement, DCPA particle size and silanization.Methods-DCPA nano-particles and two larger DCPA particles were used with nano-silica-fused whiskers as fillers in a resin matrix. Composite mechanical properties were measured via three-point flexure, and the release of Ca and PO 4 ions were measured vs. time.Results-Using DCPA nano-particles with a diameter of 112 nm, the composite at a DCPA:whisker mass ratio of 1:1 had a flexural strength (mean ± sd; n = 5) of (112 ± 17) MPa, not significantly different from (112 ± 14) MPa of a commercial non-releasing composite; both were higher than (29 ± 7) MPa for the composite at DCPA:whisker of 1:0 (p < 0.05). The composite with DCPA particle size of 112 nm released Ca to a concentration of 0.85 mmol/L and PO 4 of 3.48 mmol/L, higher than Ca of 0.67 mmol/L and PO 4 of 1.11 mmol/L using DCPA with 12 μm particle size (p < 0.05). Silanization of DCPA increased the composite strength at DCPA:whisker of 1:0 compared to that without silanization, but decreased the Ca and PO 4 release (p < 0.05). Increasing the DCPA particle surface area increased the Ca and PO 4 release.Significance-Decreasing the DCPA particle size increased the Ca and PO 4 release; whisker reinforcement increased the composite strength by 2 to 3 fold. The nano DCPA-whisker composites, with high strength and Ca and PO 4 release, may provide the needed, unique combination of stressbearing and caries-inhibiting capabilities.

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Section: Resin Composite Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanocomposites with Ca and PO4 release: Effects of reinforcement, dicalcium phosphate particle size and silanization☆

2007

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“…The sealant leaches hydroxyapatite (HAP) from the enamel surface, during a caries formation at or below pH 5.8 5) . At this low pH value, the ACP can break down and saturate the tooth with Ca 2+ and PO 4 ions 6) . These concentrations help form HAP, which the tooth uses to remineralize its enamel 7) .…”

Section: Introductionmentioning

confidence: 99%

The effect of Er:YAG laser and different surface conditioning procedures on microtensile bond strength of the fissure sealant containing amorphous calcium phosphate after artificial aging

et al. 2014

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The present study aimed to compare post-aging microtensile values of fissure sealant(FS) containing amorphous calcium phosphate(ACP) with or without bonding after various enamel-etching methods. The buccal enamel surfaces of teeth were prepared and divided into five main groups according to enamel etching (Group 1; acid-etching, Group 2; air-abrasion, Group 3; 2W, Group 4; 3W, and Group 5; 4W of Er:YAG laser). Each main group was subdivided as with(Subgroup B) or without(Subgroup A) a bonding system. We applied FS-containing ACP to etched enamel surfaces. All specimens were aged by Thermocycling and water bath. We then measured microtensile bond strengths and analyzed data with two-way ANOVA and Tukey's tests. We found a statistically significant difference between Group 1 and Group 2, between Subgroup B of Group 5 and Subgroups B of all other groups, and between Subgroups A and Subgroups B of all main groups (p<0.01). Er:YAG laser-etching may be an alternative enamel etching method to acid-etching for ACP-containing FS.

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“…At this low pH, ACP is capable of being broken down and releasing supersaturating levels of Ca ϩ2 and PO 4 ions. 5 These concentrations are conducive to the formation of HAP, which in turn can be used by the tooth for remineral-ization. 6 This elevated state can be maintained for a considerable time, offering a promising antagonist to demineralization, and can promote the prevention of future white spots throughout orthodontic treatment.…”

Section: Introductionmentioning

confidence: 99%

Bond Strength of an Amorphous Calcium Phosphate–Containing Orthodontic Adhesive

Foster

Berzins

Bradley

2008

The Angle Orthodontist

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Objective: To determine whether an amorphous calcium phosphate (ACP)-containing adhesive has an acceptable level of shear bond strength to be used as an orthodontic adhesive. Materials and Methods: Sixty extracted premolars were randomly divided into three groups for orthodontic bonding. Group 1 used a composite resin adhesive (Transbond XT), group 2 was bonded with an ACP-containing adhesive (Aegis Ortho), and group 3 used a resin-modified glass ionomer (Fuji Ortho LC). All bonded teeth were stored in distilled water at 37ЊC for 40 Ϯ 2 hours prior to debonding. Shear bond strength and adhesive remnant index (ARI) were recorded for each specimen. Results: The mean shear bond strengths for the three test groups were: group 1 (15.2 Ϯ 3.6 MPa), group 2 (6.6 Ϯ 1.5 MPa), and group 3 (8.3 Ϯ 2.8 MPa). A one-way analysis of variance showed a significant difference in bond strengths between the groups. A post hoc Tukey test showed group 1 to be significantly (P Ͻ .001) greater than groups 2 and 3. A Kruskal-Wallis test and a Mann-Whitney U-test showed groups 1 and 3 exhibited lower ARI scores than group 2, but a majority of specimens in each group had greater than 50% of the cement removed along with the bracket during debonding. Conclusions:The ACP-containing adhesive demonstrated a low, but satisfactory bond strength needed to function as an orthodontic adhesive.

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Improved properties of amorphous calcium phosphate fillers in remineralizing resin composites

Cited by 127 publications

References 13 publications

Nanocomposites with Ca and PO4 release: Effects of reinforcement, dicalcium phosphate particle size and silanization☆

Nanocomposites with Ca and PO4 release: Effects of reinforcement, dicalcium phosphate particle size and silanization☆

The effect of Er:YAG laser and different surface conditioning procedures on microtensile bond strength of the fissure sealant containing amorphous calcium phosphate after artificial aging

Bond Strength of an Amorphous Calcium Phosphate–Containing Orthodontic Adhesive

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