Weight-loss and surface roughness of enamel after microabrasion procedure with different agents

SILVA, Pâmela Lopes Pedro da; MACIEL, Patricia Pereira; MARTINS, Lídia Batista Conrado; CARVALHO, Fabíola Galbiatti de; SANTOS, Rogério Lacerda dos; MEDEIROS, Eliton Souto de; CARLO, Hugo Lemes

doi:10.1590/1807-2577.02021

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Revista de Odontologia da UNESP

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Original Article • Rev. Odontol. UNESP 50 • 2021 • https://doi.org/10.1590/1807-2577.02021 copy

Weight-loss and surface roughness of enamel after microabrasion procedure with different agents

Perda de peso e rugosidade da superfície do esmalte após procedimento de microabrasão com diferentes agentes

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Introduction

Enamel microabrasion is achieved by abrasion of the enamel surface and it is a quick, practical and efficient procedure.

Objective

It was assessed the weight loss and surface aspect of enamel after microabrasion procedures with commercial and mixtures made in-office.

Material and method

Eighty bovine incisors were divided into four groups (n=10): Opalustre^TM (6.6% HCl + silicon carbide); Whiteness RM^TM (6% HCl + silicon carbide); 37% H3PO4 + pumice and 10% HCl + pumice. Treatment was performed by 15 applications of 10s duration. The enamel weight loss was determined by the difference in weight before and after the microabrasion. The surfaces were analyzed by a surface roughness equipment and scanning electron microscopy. Data were submitted to paired-T test, one-way ANOVA and Tukey tests (α=0.05).

Result

It was observed significantly weight loss for all groups. The difference in weight loss ranged from 0.037±0.012 for group 37% H3PO4 and from 0.054±0.009 for group 6,6% HCl. There was a significant increase in surface roughness for all groups and 10% HCl group showed the lower results (0.65±0.09). It was observed different patterns of enamel morphology by SEM images.

Conclusion

The in-office mixtures resulted in the lowest enamel structure loss (37% H3PO4) and the lowest surface roughness (10% HCl).

Descriptors:
Enamel miroabrasion; tooth wear; surface roughness; microabrasion agents

Material	Manufacturer	Composition
Material	(batch number)	Composition
Opalustre	Ultradent Products Inc.	6.6% hydrochloric acid, water, silicon carbide (20-60 µm)
	(South Jordan, UT, USA)
	(B307B)
Whiteness RM	FGM	6% hydrochloric acid, deionized water, propylene glycol, thickeners, silicon carbide (with approximately 82 µm)
	(Joinville, SC, Brazil)
	(80602)
Condac 37	FGM	37% phosphoric acid
	(Joinville, SC, Brazil)
	(150612)
Hydrochloric acid	Merck Millipore	10% hydrochloric acid
	(Merck KGaA, Darmstadt, HE, Germany)
	(4805922500)
Pumice	SS White	Pumice extra-fine (0.8-3.0 µm)
	(Rio de Janeiro, RJ, Brazil)
	(052)

Microabrasion agente	Weight before (g)	Weight after (g)	Enamel weight loss (g)
6.6% HCl + silicon carbide	4.114 ± 0.849^A^* * Same uppercase letters indicate that there was no significant difference between weight before and after microabrasion procedure for each agent (paired-t- test, p>0.05). **Same lowercase letters indicate that there was no significant difference in enamel weight loss among microabrasion agents (Two-way ANOVA and Tukey test, p>0.05).	4.060 ± 0.849^B	-0.054 ± 0.009^a**
6% HCl + silicon carbide	4.201 ± 0.652^A	4.156 ± 0.650^B	-0.045 ± 0.011^a,b
37% H₃PO₄ + pumice	4.139 ± 0.934^A	4.102 ± 0.931^B	-0.037 ± 0.012^b
10% HCl + pumice	4.062 ± 0.759^A	4.010 ± 0.745^B	-0.052 ± 0.017^a

Microabrasion agent	Surface Roughness before (µm)	Surface Roughness after (µm)
6.6% HCl + silicon carbide	0.25 ± 0.04^A,a^* * Same uppercase letters indicate that there was no significant difference between surface roughness before and after microabrasion procedure for each agent (paired-t- test, p>0.05). **Same lowercase letters indicate that there was no significant difference in surface roughness values among microabrasion agents (Two-way ANOVA and Tukey test, p>0.05).	1.03 ± 0.06^B,a**
6% HCl + silicon carbide	0.23 ± 0.02^A,a	1.17 ± 0.11^B,a
37% H₃PO₄ + pumice	0.20 ± 0.02^A,a	1.22 ± 0.21^B,a
10% HCl + pumice	0.21 ± 0.01^A,a	0.65 ± 0.09^B,b

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[1] CONFLICTS OF INTERESTS

The authors declare no conflicts of interest.