Efeito de diferentes técnicas de acabamento e polimento sobre a rugosidade superficial de resinas acrílicas utilizadas para restaurações provisórias

Barbosa, Gláucia Kelly Silva; Zavanelli, Adriana Cristina; Guilherme, Adérico Santana; Zavanelli, Ricardo Alexandre

doi:10.14295/bds.2009.v12i1.248

Cited by 4 publications

(10 citation statements)

References 2 publications

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“…In another study 31 , there were also no significant differences in the roughness of the acrylic resins Dencor, Duralay and Vipi Cor. The study of Şen et al 3 showed that the methacrylate-based resin specimens showed smoother surfaces than the bis-acrylic composite specimens.…”

Section: Discussionmentioning

confidence: 86%

Effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations

et al. 2010

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Purpose: This study evaluated the effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations. Material and Methods: Three acrylic resins (Dencor-De, Duralay-Du, and Vipi Cor-VC) were selected and one composite resin (Opallis-Op) was used as a parameter for comparison. The materials were prepared according to the manufacturers' instructions and were placed in stainless steel moulds (20 mm in diameter and 5 mm thick). Thirty samples of each resin were made and divided into three groups (n = 10) according to the moment of Vickers hardness (VHN) and roughness (Ra) analyses: C (control group): immediately after specimen preparation; Sw: after storage in distilled water at 37 °C for 24 hours; Tc: after thermocycling (3000 cycles; 5-55 °C, 30 seconds dwell time). Data were submitted to 2-way ANOVA followed by Tukey's test (α = 0.05). Results: Op resin had higher surface hardness values (p < 0.0001; 25.4 ± 3.4) than the other ones (De = 4.5 ± 0.6; Du = 5.5 ± 0.4; VC = 6.1 ± 0.9). There was no statistical difference (p > 0.05) in roughness among materials (De = 0.31 ± 0.07; Du = 0.51 ± 0.20; VC = 0.41 ± 0.15; Op = 0.42 ± 0.18). Storage in water did not change hardness and roughness of the tested materials (p > 0.05). There was a significant increase in roughness after thermocycling (p < 0.05), except for material Du, which showed no significant change in roughness in any evaluated period (p = 0.99). Conclusion: Thermocycling increased the roughness in most tested materials without affecting hardness, while storage in water had no significant effect in the evaluated properties.

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Section: Discussionmentioning

confidence: 86%

Effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations

et al. 2010

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“…For this reason, temporary prostheses should be perfectly in accordance with what is desired of the definitive prosthesis. In view of this, the surface of these temporary restorations should be polished to avoid accumulation of biofilm, as well as to provide comfort for the patient and be esthetically acceptable 7 .…”

Section: Discussionmentioning

confidence: 99%

“…In view of this, in order to avoid the loss of prosthetic pillars and adjacent teeth to periodontal disease or caries, smooth well-finished parts are extremely important, in addition to making the element esthetically acceptable [6][7] . Thus, finishing and polishing techniques need to be established reconciling the use of accessible materials, reduction in clinical time and the attainment of less surface roughness 6 .…”

Section: Introductionmentioning

confidence: 99%

Effect of finishing and polishing methods on surface roughness of autopolymerized acrylic resins

Duarte

Mendonça

Freitas

et al. 2017

RGO, Rev. Gaúch. Odontol.

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ObjectiveTo evaluate the surface roughness of two makes of autopolymerized acrylic resin (Classic Dencor ® and Duralay ® ) with two different methods of finishing and polishing (conventional and using the Dhpro ® finishing & polishing kit). Methods A total of 20 specimens (10 of each make) was obtained using Zetalabor ® --Zhermak condensation silicone molds. After polymerization, 20 blocks of resin were divided in two and subjected to two types of finishing and polishing, one at each end. The types of finishing and polishing were as follows: conventional (lathe) and using the Dhpro ® finishing & polishing kit. Once finished and polished, the specimens were subjected to surface roughness testing using a roughness meter and were analyzed via the Student's t-test. Results There is a statistically significant difference between the forms of polishing, unrelated to the brand of acrylic resin. Conventional polishing achieved a level of 0.12 µm for both resins and the DhPro ® polishing presented roughness a little above 0.2 µm. ConclusionConventional polishing is superior to the DhPro ® kit, as it achieves lower levels of roughness. There is no significant difference between the acrylic resins in terms of surface roughness after the finishing and polishing processes.

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“…For each step, each specimen was polished for 10 seconds, six times per specimen, at 3,000 rotations per minute 18 . The pumice stone and Spain white pastes were prepared in the proportion of 5.0 g to 1 ml of water.…”

Section: Protocols Proposed For the Removal Of Stainsmentioning

confidence: 99%

Evaluation of methods for stain removal in acrylic resin denture teeth: in vitro study

Cassiano

Leite

Policastro

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: O manchamento dos dentes artificiais pode estar relacionado à abrasão da resina acrílica provocada pela escovação, resultando na maior deposição de corantes provenientes de bebidas, e consequentemente maior prejuízo estético. Objetivo: O objetivo do presente estudo foi avaliar métodos de remoção de manchas extrínsecas por meio de analise com espectofotômetro. Material e método: Dentes artificiais foram divididos em 12 grupos (n=10), de acordo com o tipo de tratamento (repolimento -Re ou imersão em perborato de sódio, Corega Tabs -Sp), tipo de solução de manchamento, café (Cf) ou Coca-Cola  (Cc) ou água (W) e com/sem escovação (B). Os métodos de remoção de manchas propostos (Re e Sp) foram realizados de acordo com protocolos pré-estabelecidos. Os espécimes Sp foram submetidos a 7 ciclos de imersão (5 minutos cada). O repolimento foi realizado com pastas de pedra pomes e branco de espanha, utilizando escovas de cerdas macias e rodas de feltro. As leituras de estabilidade de cor (ΔE) foram realizadas por meio de um espectrofotômetro: T0 (baseline), T1 (após escovação/imersão em bebidas), e T2 (após Re ou Sp). Resultado: Alterações de cor entre T1 e T2 (teste T pareado; α=0,05) foram observadas para o grupo CfSp (p=.032); e para os grupos BWRe (p=.000), BCfRe (p=.049) e CcRe (p=.042). Os dentes artificiais submetidos à escovação mostraram maior alteração de cor (ANOVA 2 fatores; p<0,001). Conclusão: Conclui-se que a imersão em perborato de sódio (Corega Tabs) pode ser utilizada para remoção de manchas de café e o repolimento para remoção de manchas de Coca-Cola  . Ainda, a escovação produziu as maiores alterações de cor nos dentes artificiais, independentemente da solução de imersão.Descritores: Dente artificial; prótese total; escovação; estabilidade de cor. AbstractIntroduction: The staining of artificial teeth can be related to the acrylic resin abrasion caused by brushing, resulting in higher deposition of dyes from the beverage, and consequently higher aesthetic damage. Objective: The aim of this in vitro study was to evaluate methods for removal of stains from acrylic denture teeth using spectrophotometric analysis. Material and method: Artificial teeth were divided into twelve groups (n=10) according to the type of treatment (re-polishing -Re or immersion in Corega Tabs -Sp), staining solutions, coffee (Cf) and Coca-Cola  (Cc) or water (W) and with/without toothbrushing (B). The Sp specimens were submitted to seven immersion cycles (5 min each). The Re specimens were polished with pumice stone followed by Spain white paste. Color differences (ΔE) were captured by a spectrophotometer: T0 (baseline), T1 (after brushing/immersion in solutions) and T2 (after Re or Sp). Result: Statistically significant color change between T1 and T2 (paired T-test; α =.05) was observed for the group CfSp (p=.032); and for the groups BWRe (p=.000), BCfRe (p=.049) and CcRe (p=.042). Higher color changes were observed for the specimens submitted to toothbrushing (ANOVA two way; p<.001). Conclusion: It could be c...

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Efeito de diferentes técnicas de acabamento e polimento sobre a rugosidade superficial de resinas acrílicas utilizadas para restaurações provisórias

Cited by 4 publications

References 2 publications

Effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations

Effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations

Effect of finishing and polishing methods on surface roughness of autopolymerized acrylic resins

Evaluation of methods for stain removal in acrylic resin denture teeth: in vitro study

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