Revista de Odontologia da UNESP
http://revodontolunesp.com.br/article/doi/10.1590/1807-2577.05318
Revista de Odontologia da UNESP
Original Article

Evaluation of friction in metal, ceramic and self-ligating brackets submitted to sliding mechanics

Avaliação do atrito em braquetes metálicos, cerâmicos e autoligados submetidos à mecânica de deslizamento

Aryadne Cipreste MASCARELO; Ana Paula GODOI; Vivian FURLETTI; William CUSTÓDIO; Heloisa Cristina VALDRIGHI

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Abstract

Abstract: Objective: With the purpose of evaluating the best results for a proposed orthodontic treatment, the aim of this research was to verify the frictional force between archwires and orthodontic brackets in sliding mechanics.

Material and method: Three different types of brackets were used: conventional metal, self-ligating metal and conventional polycrystalline esthetic type (n=10), totaling 30 brackets and .019 x .025 inches stainless steel rectangular wire. An acrylic plate was used. The wire was fixed to the brackets (conventional metal and conventional polycrystalline esthetic) with esthetic elastomeric ligation. The acrylic plate together with the 019 x 0.025 inches wire fitted to it was attached to the base plate of the Instron 4411 universal test machine so that it was positioned perpendicular to the ground. The bracket was drawn through the archwire segment at a speed of 5 mm / minute for a distance of 5 mm. For each type of bracket, ten tests were performed, with the bracket and archwire set being changed for each repetition. Data were analyzed by one-way Analysis of Variance (p <0.0001) and the Tukey Test (p <0.05).

Result: Convencional metal and self-ligating brackets presented similar friction (p>0.05), while ceramic bracket presented higher frictional resistance during sliding test (p<0.05).

Conclusion: It was concluded that the type of bracket influenced the frictional force value obtained, and better results were found when the metal and self-ligating brackets were used. The ceramic bracket presented a higher frictional force value.

Keywords

Dental friction, orthodontic wires, orthodontic brackets

Resumo

Resumo: Objetivo: Visando avaliar os melhores resultados para um tratamento ortodôntico de premissa, esta pesquisa teve como objetivo verificar a força de atrito entre fio e braquetes ortodônticos na mecânica de deslizamento.

Material e método: Foram utilizados três diferentes tipos de braquetes, sendo metálico convencional, metálico autoligado e estético policristalino convencional (n=10), totalizando 30 braquetes e fio retangular de aço inoxidável .019 x .025 polegadas. Foi utilizada uma placa de acrílico. O fio foi fixado aos braquetes (metálico convencional e estético policristalino convencional) com ligadura elastomérica estética. A placa de acrílico juntamente com o fio .019 x .025 polegadas montado foi fixada ao mordente da base da máquina de ensaio universal Instron 4411, de maneira que ficou posicionada perpendicular em relação ao solo. O braquete foi tracionado à velocidade de 5 mm/minuto através do segmento do fio por uma distância de 5mm. Para cada tipo de braquete foi realizado dez testes havendo a troca do conjunto braquete e fio em cada repetição. Os dados foram analisados por Análise de Variância um fator (p<0,0001) e Teste de Tukey (p<0,05).

Resultado: Braquetes metálicos convencionais e autoligáveis apresentaram atrito similar (p>0,05), enquanto braquetes cerâmicos apresentaram maior resistência ao atrito durante o teste de deslizamento (p<0,05).

Conclusão: Conclui-se que o tipo de braquete influenciou no valor de atrito obtido, sendo que melhores resultados foram encontrados quando foram utilizados os braquetes metálicos e autoligados. O braquete cerâmico apresentou maior atrito.
 

Palavras-chave

Atrito dentário, fios ortodôntico, braquetes ortodônticos

References

Pasha A, Vishwakarma S, Narayan A, Vinay K, Shetty SV, Roy PP. Comparison of frictional forces generated by a new ceramic bracket with the conventional brackets using unconventional and conventional ligation system and the self-ligating brackets: An in vitro study. J Int Oral Health. 2015 Sep;7(9):108-13. PMid:26435628.

Bednar JR, Gruendeman GW, Sandrik JL. A comparative study of frictional forces between orthodontic brackets and arch wires. Am J Orthod Dentofacial Orthop. 1991 Dec;100(6):513-22. http://dx.doi.org/10.1016/0889-5406(91)70091-A. PMid:1962604.

Kim TK, Kim KD, Baek SH. Comparison of frictional forces during the initial leveling stage in various combinations of self-ligating brackets and archwires with a custom-designed typodont system. Am J Orthod Dentofacial Orthop. 2008 Feb;133(2):187.e15-24. http://dx.doi.org/10.1016/j.ajodo.2007.08.013. PMid:18249279.

Marques IS, Araújo AM, Gurgel JA, Normando D. Debris, roughness and friction of stainless steel archwires following clinical use. Angle Orthod. 2010 May;80(3):521-7. http://dx.doi.org/10.2319/081109-457.1. PMid:20050747.

Dholakia KD, Bhat SR. Clinical efficiency of nonconventional elastomeric ligatures in the canine retraction phase of preadjusted edgewise appliance therapy: an in-vivo study. Am J Orthod Dentofacial Orthop. 2012 Jun;141(6):715-22. http://dx.doi.org/10.1016/j.ajodo.2011.12.023. PMid:22640673.

Kannan MS, Murali RV, Kishorekumar S, Gnanashanmugam K, Jayanth V. Comparison of frictional resistance of esthetic and semi-esthetic self-ligating brackets. J Pharm Bioallied Sci. 2015 Apr;7(5 Suppl 1):S116-20. http://dx.doi.org/10.4103/0975-7406.155852. PMid:26015687.

Sobreira CR, Loriato LB, Oliveira DD. Braquetes estéticos: características e comportamento clinico. Rev Clín Ortodon Dental Press. 2007 Mar;6(1):94-102.

Kaur G, Goyal S, Rajpal S, Gera A. Comparative evaluation of frictional forces of conventional and self-ligating brackets systems: an in vitro study. J Indian Orthod Soc. 2013 Oct-Dec;47(4):339-42. http://dx.doi.org/10.5005/jp-journals-10021-1183.

Burrow SJ. Friction and resistance to sliding in orthodontics: a critical review. Am J Orthod Dentofacial Orthop. 2009 Apr;135(4):442-7. http://dx.doi.org/10.1016/j.ajodo.2008.09.023. PMid:19361729.

Venancio FR, Vedovello SAS, Tubel CAM, Degan VV, Lucato AS, Lealdin LN. Effect of elastomeric ligatures on frictional forces between the archwire and orthodontic bracket. Braz J Oral Sci. 2013 Mar;12(1):41-5. http://dx.doi.org/10.1590/S1677-32252013000100009.

Kim TK, Kim KD, Baek SH. Comparison of frictional forces during the initial leveling stage in various combinations of self-ligating brackets and archwires with a custom-designed typodont system. Am J Orthod Dentofacial Orthop. 2008 Feb;133(2):187.e15-24. http://dx.doi.org/10.1016/j.ajodo.2007.08.013. PMid:18249279.

Monteiro MRG, Silva LE, Elias CN, Vilella OV. Frictional resistance of self- ligating versus conventional brackets in different bracket-archwire-angle combinations. J Appl Oral Sci. 2014 Jun;22(3):228-34. http://dx.doi.org/10.1590/1678-775720130665. PMid:25025564.

Gandini P, Orsi L, Bertoncini C, Massironi S, Franchi L. In vitro frictional forces generated by three different ligation methods. Angle Orthod. 2008 Sep;78(5):917-21. http://dx.doi.org/10.2319/090607-420.1. PMid:18298218.

Hain M, Dhopatkar A, Rock P. The effect of ligation method on friction in sliding mechanics. Am J Orthod Dentofacial Orthop. 2003 Apr;123(4):416-22. http://dx.doi.org/10.1067/mod.2003.14. PMid:12695769.

Tecco S, Di Iorio D, Nucera R, Di Bisceglie B, Cordasco G, Festa F. Evaluation of the friction of self-ligating and conventional bracket systems. Eur J Dent. 2011 Jul;5(3):310-7. PMid:21769273.

Kumar S, Singh S, Hamsa P R R, Ahmed S, Prasanthma, Bhatnagar A, et al. Evaluation of friction in orthodontics using various brackets and archwire combination-an in vitro study. J Clin Diagn Res. 2014 May;8(5):ZC33-6. http://dx.doi.org/10.7860/JCDR/2014/7990.4364. PMid:24995241.

Geremia JR, Oliveira PS, Motta RHL. Comparação da força de atrito entre bráquetes autoligados e bráquetes convencionais com diferentes ligaduras. Orthod Sci Orthod Sci Pract. 2015;8(29):30-7.

Buzzoni R, Elias CN, Fernandes DJ, Miguel JAM. Influência da secção transversa de fios ortodônticos na fricção superficial de braquetes autoligados. Dental Press J Orthod. 2011 Aug;16(4):35.e1-7. http://dx.doi.org/10.1590/S2176-94512011000400006.

Mazziotto AH, Vedovello S, Ducatto A, Maria MS Jr, Tubel CAM, Vedovello M Fo. Resistência ao deslizamento em fio de aço inoxidável de braquetes nacionais estéticos. Orthod Sci Orthod Sci Pract. 2010;3(11):207-13.

Pillai AR, Gangadharan A, Kumar S, Shah A. Comparison of the frictional resistance between arckwire and different bracket system: an in vitro study. J Pharm Bioallied Sci. 2014 Jul;6(5 Suppl 1):S150-5. http://dx.doi.org/10.4103/0975-7406.137429. PMid:25210359.

Arash V, Rabiee M, Rakhshan V, Khorasani S, Sobouti F. In vitro evaluation of frictional forces of two ceramic orthodontic brackets versus a stainless steel bracket in combination with two types of archwires. J Orthod Sci. 2015 Apr-Jun;4(2):42-6. http://dx.doi.org/10.4103/2278-0203.156028. PMid:26020037.

Reicheneder CA, Baumert U, Gedrange T, Proff P, Faltermeier A, Muessig D. Frictional properties of aesthestic brackets. Eur J Orthod. 2007 Aug;29(4):359-65. http://dx.doi.org/10.1093/ejo/cjm033. PMid:17702795.

Lee SM, Hwang CJ. A comparative study of frictional force in self-ligating brackets acording to the bracket-arckwire angulation, bracket material, and wire type. Korean J Orthod. 2015 Jan;45(1):13-9. http://dx.doi.org/10.4041/kjod.2015.45.1.13. PMid:25667913.

Barbosa JA, Elias CN, Basting RT. Evaluation of friction produced by self-ligating, conventional and Barbosa Versatile brackets. Rev Odontol UNESP. 2016 Apr;45(2):71-7. http://dx.doi.org/10.1590/1807-2577.09515.
 

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