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Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process
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Keywords

Acrylic resin. Polishing. Surface roughness. Microwave processing

How to Cite

1.
Rizzatti-Barbosa CM, Gabriotti MN, Silva-Concilio LR, Joia FA, Machado C, Ribeiro MC. Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process. Braz. J. Oral Sci. [Internet]. 2015 Nov. 25 [cited 2024 Feb. 26];5(16):977-81. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641878

Abstract

The aim of this study was to evaluate the influence of polymerization methods (microwave energy - MW, and water bath - WB) and polishing techniques (chemical - C and mechanical - M) on the surface roughness of one heat-polymerized acylic resin (Vipi-Cril). Forty acrylic resin disk-shaped samples were made according to ADA specification nº 12. Half of samples were processed by microwave energy (500W for 3 minutes), and the other half by water bath (74±1 ºC for 9 hours). After deflasking, the samples were trimmed with a sequence of abrasive aluminum oxide sandpapers of different grades (180, 220 and 400) and divided in 4 groups according to polymerization methods and polishing techniques: G1: MW+CP, G2: MW+MP, G3: WB+CP and G4: WB+MP. Surface roughness values were measured using a Surfcorder SE 1700 rugosimeter (Kosaka Laboratory Ltd, Kosaka, Japan). Mann-Whitney test (p=.05) indicated significant differences between polishing methods processed by microwave energy (p= .0018), and between polishing methods processing by water bath (p= .0002). Samples processed by both methods (water bath or microwave energy) showed smoother surfaces when polished by mechanical polishing method, and polymerization methods did not influence in surface roughness.
https://doi.org/10.20396/bjos.v5i16.8641878
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References

Quirynen M, Bollen CM. The influence of surface roughness and surface-free energy on supra and subgingival plaque formation in man, a review of literature. J Clin Periodontol 1995; 22: 1-14.

Verran J, Maryan CJ. Retention of Candida Albicans on acrylic resin and silicon of different surface topography. J Prosthet Dent 1997; 77: 535-9.

Taylor R, Maryan CJ, Veran J. Retention of oral microorganisms on cobalt-chromium alloy and dental acrylic resin with different surface finishes. J Prosthet Dent 1998; 80: 592-7.

Ulusoy M, Ulusoy N, Aydin AK. An evaluation of polishing techniques on surface roughness of acrylic resin. J Prosthet Dent 1986; 56: 107-12.

Quirynen M, Marechal M, Busscher HJ, Weerkamp AH, Darius PL, Van Steenberghe D. The influence of surface-free energy and surface roughness on early plaque formation. An in vivo study in man. J Clin Periodontol 1990; 17: 138-44.

Gotusso MJ. Chemical and superficial treatment of acrylic resin. Rev Asoc Odontol Argent. 1969; 57: 359-61.

Nishii M. Studies on the curing of denture base resins with microwave irradiation with particular reference to heat curing resins. J Osaka Dent Univ. 1968; 2: 23-40.

Mello,JAN, Braun KO, Rached RN, Del Bel Cury AA. Reducing the negative effects of chemical polishing in acrylic resins by use of an additional cycle of polymerization. J Prosthet Dent 2003; 89: 598-602.

Lorton L, Phillips WR. Heat-released stress in acrylic dentures. J Prosthet Dent 1979; 42: 23-6.

Rahal JS, Mesquita MF, Henriques GEP, Nóbilo MAA. Surface roughness of acrylic resins submitted to mechanical and chemical polishing. J Oral Rehabil. 2004; 31: 1075-9.

American Dental Association. Revised American Dental Association Specification nº 12 for dental base polymers. J Am Dent Assoc. 1975; 90: 451-8.

Anusavice KJ. Phillips: dental materials. Rio de Janeiro: Guanabara Koogan; 1998. p.125-39, 394-405.

O’Brien WJ. Dental materials and their selection. Chicago: Quintessence; 1997. p.115-22.

The Brazilian Journal of Oral Sciences uses the Creative Commons license (CC), thus preserving the integrity of the articles in an open access environment.

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