Revista de Odontologia da UNESP
http://revodontolunesp.com.br/article/doi/10.1590/1807-2577.07418
Revista de Odontologia da UNESP
Original Article

Efeito da escovação e das bebidas na rugosidade superficial de bráquetes cerâmicos

Effect of brushing and beverages on surface roughness of ceramic brackets

Cibele Braga de OLIVEIRA; Luiz Gonzaga GANDINI JÚNIOR; Ary SANTOS-PINTO

Resumo

Resumo: Introdução: Quando introduzidos no meio bucal, os bráquetes cerâmicos podem sofrer alterações em sua estrutura provocadas pelo processo de degradação química e mecânica do material.

Objetivo: Este estudo avaliou a rugosidade superficial de bráquetes cerâmicos e se eles sofreram alteração com a escovação dentária e a imersão em bebidas com diferentes pH.

Material e método: Foram testados sete bráquetes cerâmicos de incisivo central superior direito de quatro marcas comerciais (duas marcas de bráquete monocristalino e duas de policristalino). Os bráquetes foram imersos em soluções de café, vinho tinto, Coca-Cola, chá preto e saliva artificial durante 21 dias. Outros sete bráquetes de cada marca comercial foram imersos nas mesmas soluções e no mesmo tempo, porém com intervalos de escovação diários realizados por uma máquina de escovação. A rugosidade (Ra) foi obtida por meio de um rugosímetro (Surftest SJ-400, Mitutoyo®) antes e após 24 horas, 7, 14 e 21 dias. Os dados foram avaliados pela análise de perfis multivariados, análise de variância (ANOVA) e teste de comparação múltipla de médias.

Resultado: Os resultados da rugosidade e de sua alteração após 21 dias foram: média Ra do Allure = 0,277 μm (alteração = 0,002 μm), Inspire Ice = 0,262 μm (alteração = 0,013 μm), Radiance = 0,177 μm (alteração = 0,009 μm) e Transcend = 0,367 μm (alteração = 0,019 μm).

Conclusão: A rugosidade superficial dos bráquetes cerâmicos aumentou após 21 dias de imersão nas soluções, sendo o tempo de imersão um fator significante. No entanto, essa alteração da rugosidade no tempo é semelhante nos bráquetes monocristalinos e policristalinos, assim como nas diferentes soluções. A escovação dentária não produziu alteração na rugosidade superficial de bráquetes cerâmicos.

Palavras-chave

Propriedades de superfície, suportes ortodônticos, escovação dentária, agentes corantes alimentares

Abstract

Abstract: Introduction: When introduced into the oral environment, the ceramic brackets may undergo change their structure caused by the process of chemical and mechanical degradation of the material.

Objective: This study evaluated the surface roughness of ceramic brackets and whether it is altered by toothbrushing process and diet solutions.

Material and method: Seven ceramic brackets of four commercial brands were tested: two monocrystalline and two polycrystalline. The brackets were immersed in solutions of coffee, red wine, Coke, black tea and artificial saliva for 21 days. Another group of brackets of each brand were also immersed in the same solutions and for an equal time, but with daily brushing performed by a toothbrushing machine. The surface roughness (Ra) was analyzed by a Roughness Tester (Surftest SJ–400,Mitutoyo®) before and after 24 hours, 7, 14 and 21 days. The data were evaluated by the Analysis of Multivariate Profiles, Analysis of Variance (ANOVA), multiple comparison test of means.

Result: The results of Ra and its change after 21 days were: Ra mean of Allure = 0.277μm (change = 0.002μm), Inspire Ice = 0.262μm (change = 0.013μm), Radiance = 0.177μm change = 0.009μm), Transcend = 0.367μm (change = 0.019μm).

Conclusion: the surface roughness of the ceramic brackets increased after 21 days of immersion in the solutions, and the immersion time was a significant factor. However, this change in the surface roughness was similar for the monocrystalline and polycrystalline brackets, as well as for the different solutions. Brushing did not change the surface roughness of ceramic brackets.
 

Keywords

Surface properties, orthodontic brackets, toothbrushing, food coloring agents

References

Oilo G. Biodegradation of dental composites/glass-ionomer cements. Adv Dent Res. 1992 Sep;6(1):50-4. http://dx.doi.org/10.1177/08959374920060011701. PMid:1292463.

Badra VV, Faraoni JJ, Ramos RP, Palma-Dibb RG. Influence of different beverages on the microhardness and surface roughness of resin composites. Oper Dent. 2005 Mar-Apr;30(2):213-9. PMid:15853107.

Heintze SD, Forjanic M. Surface roughness of different dental materials before and after simulated toothbrushing in vitro. Oper Dent. 2005 Sep-Oct;30(5):617-26. PMid:16268397.

Kawai K, Iwami Y, Ebisu S. Effect of resin monomer composition on toothbrush wear resistance. J Oral Rehabil. 1998 Apr;25(4):264-8. http://dx.doi.org/10.1111/j.1365-2842.1998.00246.x. PMid:9610853.

Garcia FC, Wang L, D’Alpino PH, Souza JB, Araujo PA, Mondelli RF. Evaluation of the roughness and mass loss of the flowable composites after simulated toothbrushing abrasion. Braz Oral Res. 2004 Apr-Jun;18(2):156-61. http://dx.doi.org/10.1590/S1806-83242004000200012. PMid:15311320.

Yap AU, Wu SS, Chelvan S, Tan ES. Effect of hygiene maintenance procedures on surface roughness of composite restoratives. Oper Dent. 2005 Jan-Feb;30(1):99-104. PMid:15765964.

Wriedt S, Schepke U, Wehrbein H. The discoloring effects of food on the color stability of esthetic brackets – an in-vitro study. J Orofac Orthop. 2007 Jul;68(4):308-20. http://dx.doi.org/10.1007/s00056-007-0640-2. PMid:17639279.

Mendonça MR, Fabre AF, Goiatto MC, Cuoghi OA, Martins LP, Verri ACG. Spectrophotometric evaluation of color changes of esthetic brackets stored in potentially staining solutions. RPG Rev Pós Grad. 2011;18(1):20-7.

Guignone BC, Silva LK, Soares RV, Akaki E, Goiato MC, Pithon MM, et al. Color stability of ceramic brackets immersed in potentially staining solutions. Dental Press J Orthod. 2015 Aug;20(4):32-8. http://dx.doi.org/10.1590/2176-9451.20.4.032-038.oar. PMid:26352842.

Oliveira CB, Maia LGM, Santos-Pinto A, Gandini LG Jr. In vitro study of color stability of polycrystalline and monocrystalline ceramic brackets. Dental Press J Orthod. 2014 Aug;19(4):114-21. http://dx.doi.org/10.1590/2176-9451.19.4.114-121.oar. PMid:25279530.

Zinelis S, Eliades T, Eliades G, Makou M, Silikas N. Comparative assessment of the roughness, hardness, and wear resistance of aesthetic bracket materials. Dent Mater. 2005 Sep;21(9):890-4. http://dx.doi.org/10.1016/j.dental.2005.03.007. PMid:16045979.

Lee YK. Changes in the reflected and transmitted color of esthetic brackets after thermal cycling. Am J Orthod Dentofacial Orthop. 2008 May;133(5):641.e1-6. http://dx.doi.org/10.1016/j.ajodo.2007.10.035. PMid:18456136.

Yu B, Lee YK. Aesthetic color performance of plastic and ceramic brackets—an in vitro study. J Orthod. 2011 Sep;38(3):167-74. http://dx.doi.org/10.1179/14653121141434. PMid:21875990.

Kusy RP. Morphology of polycrystalline alumina brackets and its relationship to fracture toughness and strength. Angle Orthod. 1988 Jul;58(3):197-203. http://dx.doi.org/10.1043/0003-3219(1988)058<0197:MOPABA>2.0.CO;2. PMid:3189953.

Saunders CR, Kusy RP. Surface topography and frictional characteristics of ceramic brackets. Am J Orthod Dentofacial Orthop. 1994 Jul;106(1):76-87. http://dx.doi.org/10.1016/S0889-5406(94)70024-9. PMid:8017353.

Park K-H, Yoon H-J, Kim SJ, Lee G-J, Park H-K, Park Y-G. Surface roughness analysis of ceramic bracket slots using atomic force microscope. Korean J Orthod. 2010 Oct;40(5):294-303. http://dx.doi.org/10.4041/kjod.2010.40.5.294.

Voltarelli FR, Santos-Daroz CB, Alves MC, Cavalcanti AN, Marchi GM. Effect of chemical degradation followed by toothbrushing on the surface roughness of restorative composites. J Appl Oral Sci. 2010 Dec;18(6):585-90. http://dx.doi.org/10.1590/S1678-77572010000600009. PMid:21308289.

Anıl N, Bolay S. Effect of toothbrushing on the material loss, roughness, and color of intrinsically and extrinsically stained porcelainused in metal-ceramic restorations: an in vitro study. Int J Prosthodont. 2002 Sep-Oct;15(5):483-7. PMid:12375465.

Bativala F, Weiner S, Berendsen P, Vincent GR, Ianzano J, Harris WT Jr. The microscopic appearance and effect of toothbrushing on extrinsically stained metal-ceramic restorations. J Prosthet Dent. 1987 Jan;57(1):47-52. http://dx.doi.org/10.1016/0022-3913(87)90115-6. PMid:3468249.
 

5b97b5740e88257a0188bacb rou Articles
Links & Downloads

Rev. odontol. UNESP

Share this page
Page Sections