Effect of Fluoride and Simplified Adhesive Systems on the Bond Strength of Primary Molars and Incisors

Firoozmand, Leily Macedo; Noleto, Lawanne Ellen Carvalho; Gomes, Isabella Azevedo; Bauer, José; Ferreira, Meire Coelho

doi:10.1590/0103-6440201300160

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…28 A significant concern with the addition of CaF 2 in the dental materials is their questionable stability; however, they are aptly stable in the dynamic oral environment than usually perceived. 29 Considering all these advantageous properties of these fillers, we were encouraged to integrate CaF 2 nanoparticles in our EA and assess their impact on various properties of the adhesive.…”

Section: Discussionmentioning

confidence: 99%

Adhesive bond integrity of Y‐TZP post with calcium fluoride infiltrated resin dentin adhesive: An SEM, EDX, FTIR and micro‐Raman study

AlHamdan

Al-Saleh

AlRefeai

et al. 2021

Surface & Interface Analysis

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The study aimed to synthesize calcium fluoride (CaF 2 ) nanoparticles and compare the push-out bond strength and viscosity of experimental adhesive (EA) and EA with 5 wt.% CaF 2 (CAF-5%). The CaF 2 nanoparticles were synthesized and then characterized with scanning electron microscopy (SEM)-energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR), and micro-Raman spectroscopies. CaF 2 nanoparticles were incorporated in the adhesives to yield two groups; gp-1: EA-CAF-0% (control) and gp-2: CAF-5%. Canals of 20 teeth (N = 20) were prepared, and then yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramic posts were cemented. Adhesives were assessed for push-out bond strength and rheology. CaF 2 filler was seen as irregularly shaped agglomerates on SEM. The EDX analysis demonstrated the presence of calcium and fluoride for the CAF-5% group. The FTIR indicated characteristic bands for CaF 2 containing materials. The micro-Raman spectra of CaF 2 nanoparticles demonstrated the presence of CaF 2 by showing strong bands at 840 cm À1 , 1380 cm -1, and 1400 cm À1 for fluorine and 950 cm À1 and 1080 cm À1 for calcium ions. The highest push-out bond strength values were obtained for CAF-5% group samples (cervical: 9.67 ± 1.46 MPa, apical: 8.66 ± 1.24 MPa), and both adhesives revealed adhesive-dentin interfacial fractures. The CAF-5% adhesive also revealed comparable rheological properties with the controls. The addition of CaF 2 nanoparticles in the adhesive improved its push-out bond strength to Y-TZP post and root dentin, although CAF-5% showed reduced viscosity on rheological assessment (compared with the controls).

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Section: Discussionmentioning

confidence: 99%

Adhesive bond integrity of Y‐TZP post with calcium fluoride infiltrated resin dentin adhesive: An SEM, EDX, FTIR and micro‐Raman study

AlHamdan

Al-Saleh

AlRefeai

et al. 2021

Surface & Interface Analysis

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“…A fluoride-releasing adhesive system is expected to promote the mineralization of demineralized dentin/enamel around a composite restoration, thereby contributing to the longevity of the restoration [6][7][8]. In contrast, the application of fluoride to tooth substrates prior to bonding is a controversial issue, because increasing acid resistance of tooth structure may reduce the etching effect, particularly with self-etch adhesive systems [9].…”

Section: Introductionmentioning

confidence: 99%

Fluoride-Releasing Self-Etch Adhesives Create Thick ABRZ at the Interface

Nikaido

Takagaki

Sato

et al. 2021

BioMed Research International

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A fluoride-releasing adhesive system is expected to promote mineralization of demineralized dentin/enamel around a composite restoration, thereby contributing to the longevity of the restoration. Scanning electron microscopic (SEM) and transmission electron microscopic (TEM) observations revealed the formation of an “acid–base resistant zone” (ABRZ) beneath the hybrid layer when dentin was treated with a self-etch adhesive system. A thicker ABRZ was formed from the upper slope to the end of the outer lesion, indicating greater resistance against an acid-base challenge, when a fluoride-releasing self-etch adhesive system was used. The slope formation of a fluoride-releasing adhesive is believed to be due to fluoride-release from the adhesive. Quantitative assessment of the acid resistance was performed at the interface using the region of interest (ROI) mode of a digital image analysis software package. The area of the ABRZ is influenced by the concentration of fluoride release from the adhesive resin. The threshold of fluoride concentration in the adhesive may exist to influence the morphology of the ABRZ. X-ray absorption fine structure (XAFS) analysis of the dentin treated with different concentrations of NaF-mouth rinses suggested that different fluoride concentrations result in the formation of different chemical compounds, such as fluorapatite and CaF2-like structures, on the dentin surface. This may explain the differences in μTBS values and morphological appearance of the ABRZ. NaF is effective in enhancing the enamel/dentin bond durability and also helps create a high quality of ARBZ to improve the clinical success of restorations.

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“…As secondary caries is one major problem that impacts the longevity of the composite restorations, the incorporation of fluoride-releasing CaF 2 nano-crystals warrants continued sustained release of fluoride, ensuing an overall anti-caries effect [31]. One main concern with the use of CaF 2 nano-crystals is their stability; however, they are adequately stable in the oral environment than usually reputed [32]. These beneficial properties encouraged us to incorporate a combination of these two ions in the form of CaF 2 nano-crystals in our EA and analyze its effect on the adhesive's properties and dentin interaction.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Bond Integrity, Durability, and Degree of Conversion of a Calcium Fluoride Reinforced Dentin Adhesive

et al. 2021

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Our study aimed to synthesize and compare the mechanical properties and dentin interaction of two adhesives; experimental adhesive (EA) and EA containing 5 wt.% calcium fluoride (CaF2) nano-crystals (CaF2 adhesive-CAFA). CaF2 nano-crystals were synthesized by reacting two solutions (containing calcium and fluoride) in a glass chamber using a heated air system. The EA was produced using a mix of monomers, photo-initiators, camphorquinone, and electron initiators. The synthesized CaF2 nano-crystals were centrifuged to guarantee that inside the adhesive there is homogenized dispersion of the filler particles. Their integration in the EA yielded two groups; Gp-1: EA (without CaF2, control) and Gp-2: (5 wt.% CaF2 containing adhesive, CAFA). Sixty teeth were prepared and set to form bonded specimens using the two adhesives. The CaF2 nano-crystals were irregularly shaped with an average particle size of 30–200 nm. The highest μTBS values were obtained for CAFA-non-thermocycled (NTC) samples (32.63 ± 3.15), followed by EA-NTC (31.80 ± 3.75) specimens. On thermocycling (TC), both adhesive groups presented lower μTBS values (CAFA-TC: 29.47 ± 3.33 and EA-TC: 24.04 ± 3.69). Hybrid layer (HL) formation and resin tags of varying depths were perceived for both adhesive groups. The EDX analysis demonstrated the presence of carbon (C), silica (Si), calcium (Ca), and fluoride (F) for CAFA group. Micro-Raman spectroscopy revealed distinct peaks for CaF2 nano-crystals. The CAFA group presented the greatest DC. The addition of CaF2 nano-crystals in the adhesive caused improved bond μTBS and DC. The incorporation also demonstrated suitable dentin interaction, depicted by appropriate HL and resin tag development.

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Effect of Fluoride and Simplified Adhesive Systems on the Bond Strength of Primary Molars and Incisors

Cited by 9 publications

References 18 publications

Adhesive bond integrity of Y‐TZP post with calcium fluoride infiltrated resin dentin adhesive: An SEM, EDX, FTIR and micro‐Raman study

Adhesive bond integrity of Y‐TZP post with calcium fluoride infiltrated resin dentin adhesive: An SEM, EDX, FTIR and micro‐Raman study

Fluoride-Releasing Self-Etch Adhesives Create Thick ABRZ at the Interface

Assessment of Bond Integrity, Durability, and Degree of Conversion of a Calcium Fluoride Reinforced Dentin Adhesive

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