Influence of different acid etching times on the shear bond strength of brackets bonded to bovine enamel

Silva, Clyvis Maurício Ferreira da; Costa, André Felipe de Menezes; Costa, Ana Rosa; Neves, José Guilherme; Godoi, Ana Paula; Góes, Vívian Fernandes Furletti de

doi:10.1016/j.sdentj.2020.10.003

Cited by 5 publications

(5 citation statements)

References 26 publications

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“…A large number of studies on the synthesis of composite materials have used amino acids in an anionic form, that is, at pH values above the isoelectric point (pH > 8) [ 17 , 18 , 23 , 25 , 26 ]. However, current enamel and dentin pre-treatment therapeutical procedures (the total-etch technique of tooth surface for chemically adhesive composite restorations), use strong acid-based solutions (pH ≤ 2) [ 27 ]. This environment may lead to a different interaction mechanism not only between the components of the biomimetic composite, but also with the natural tissue being restored.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Nanocrystalline Calcium Carbonate-Substituted Hydroxyapatite and L-Lysine and L-Arginine Surface Interactions on the Molecular Properties of Dental Biomimetic Composites

et al. 2021

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Differences in the surface interactions of non-stoichiometric nanocrystalline B-type carbonate-substituted hydroxyapatite (n-cHAp) with the amino acids L-Lysine hydrochloride (L-LysHCl) and L-Arginine hydrochloride (L-ArgHCl) in acidic and alkaline media were determined using structural and spectroscopic analysis methods. The obtained data confirm that hydroxyapatite synthesized using our technique, which was used to develop the n-cHAp/L-LysHCl and n-cHAp/L-ArgHCl composites, is nanocrystalline. Studies of molecular composition of the samples by Fourier transform infrared spectroscopy under the change in the charge state of L-Lysine in environments with different alkalinity are consistent with the results of X-ray diffraction analysis, as evidenced by the redistribution of the modes’ intensities in the spectra that is correlated with the side chains, i.e., amide and carboxyl groups, of the amino acid. During the formation of a biomimetic composite containing L-Lysine hydrochloride and n-cHAp, the interaction occurred through bonding of the L-Lysine side chain and the hydroxyl groups of hydroxyapatite, which created an anionic form of L-Lysine at pH ≤ 5. In contrast, in biocomposites based on L-Arginine and n-cHAp, the interaction only slightly depends on pH value, and it proceeds by molecular orientation mechanisms. The X-ray diffraction and infrared spectroscopy results confirm that changes in the molecular composition of n-cHAp/L-ArgHCl biomimetic composites are caused by the electrostatic interaction between the L-ArgHCl molecule and the carbonate-substituted calcium hydroxyapatite. In this case, the bond formation was detected by Fourier transform infrared (FTIR) spectroscopy; the vibrational modes attributed to the main carbon chain and the guanidine group of L-Arginine are shifted during the interaction. The discovered interaction mechanisms between nanocrystalline carbonate-substituted hydroxyapatite that has physicochemical properties characteristic of the apatite in human dental enamel and specific amino acids are important for selecting the formation conditions of biomimetic composites and their integration with the natural dental tissue.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Nanocrystalline Calcium Carbonate-Substituted Hydroxyapatite and L-Lysine and L-Arginine Surface Interactions on the Molecular Properties of Dental Biomimetic Composites

et al. 2021

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“…Silva et al (25) in their study concluded that there was no increase in strength adhesion with prolonged tooth enamel etching. Our study showed higher values of bond strength using phosphoric acid over a longer time interval of 30 s, noting that in group 3 the highest bond strength was obtained with prior enamel acid-etching for 15 s using smaller brackets bases, while the lowest bond strength was obtained in group 1.…”

Section: Discussionmentioning

confidence: 94%

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

Mitić,

Todorović,

Mitić

et al. 2024

Acta fac medic Naissensis

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Introduction/Aim. The length of tooth enamel conditioning time and the size of bracket bases are some the factors influencing the bond strength between the two adherents. The aim of this study was to compare the shear bond strength (SBS) between two different types of bonded metal brackets and acid-etched enamel surface in two different times. Material and methods. Forty extracted human premolars were randomly divided into four groups. In groups 1 and 2, metal brackets Topic (Dentaurum, Germany) were bonded after etching with 37% phosphoric acid (Gel, Reliance, USA) for 15 s and 30 s, while in groups 3 and 4, metal brackets Equilibrium mini (Dentaurum, Germany) were bonded after etching for 15 s and 30 s. Brackets were bonded using flowable composite Heliosit Orthodontic (Ivoclar Vivadent, Liechtenstein) and light-cured using a LED lamp. The SBS was measured by an electronic dynamometer at a cross-head speed of 5 mm/min. Results. Statistical analysis revealed that SBS is affected by both bracket type (t = 10.62; p < 0.01) and etching time (t = 2.81; p = 0.008). The Equilibrium mini brackets with previous enamel etching for 30 s showed the highest SBS values of 10.8 ± 0.75 MPa, while the Topic brackets with previous enamel etching for 15 s showed the lowest values of 4.85 ± 0.53 MPa. Conclusion. Increasing the etching time of tooth enamel leads to higher values in bond strength, especially when using a bracket with a smaller base.

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“…Prismatic crystallites scatter light due to their refractive index which is slightly higher than that of the surrounding medium but the inter-prismatic crystallites do the same but their index is slightly lower. Hence this arrangement of prisms and interprismatic material causes diffraction of light waves (16).…”

Section: Discussionmentioning

confidence: 99%

Enamel Demineralization and Remineralization Detection Using Non-invasive Optical Imaging

Memon¹,

Hirani²,

Yousfani³

et al. 2021

PJMHS

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Introduction: Optical Coherence Tomography (OCT), is one of the most emerging diagnostic imaging technique. It is capable of producing 3D images using optical scattering media. The fast signal acquisition quality has made it a promising tool to detect early in vivo and in vitro lesions. The aim of this study was to reproduce previous demineralization results and to detect remineralization using OCT. Methodology: Bovine enamel discs were used thoroughly in this study. The study was done using the flow cell for detecting demineralization and remineralization following 96 hours demineralization and 192 hours remineralization. A time lapse monitoring was done and the lesions were assessed visually. ImageJ software was used to process the images produced through OCT. The lesion depth and intensity was measured across the images produced which helped in assessing the difference between remineralization and demineralization. Results: OCT B-scan images result in increased backscattering light which is considered the main principle to measure lesion depth and mineral loss. Whereas, in remineralization decreased band of light appeared with reduction in porosity during mineral precipitation. The results for remineralization were diverse and could not be assessed. Conclusion: OCT is favorable technique to detect demineralization and remineralization but it still needs a lot of improvement especially regarding remineralization there are limitations which need to be improved.

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Influence of different acid etching times on the shear bond strength of brackets bonded to bovine enamel

Cited by 5 publications

References 26 publications

Investigation of the Effect of Nanocrystalline Calcium Carbonate-Substituted Hydroxyapatite and L-Lysine and L-Arginine Surface Interactions on the Molecular Properties of Dental Biomimetic Composites

Investigation of the Effect of Nanocrystalline Calcium Carbonate-Substituted Hydroxyapatite and L-Lysine and L-Arginine Surface Interactions on the Molecular Properties of Dental Biomimetic Composites

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

Enamel Demineralization and Remineralization Detection Using Non-invasive Optical Imaging

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