Effect of microwave treatments on dimensional accuracy of maxillary acrylic resin denture base

Pavan, Sabrina; Filho, João Neudenir Arioli; Santos, Paulo Henrique dos; Mollo, Francisco de Assis

doi:10.1590/s0103-64402005000200006

Cited by 49 publications

(50 citation statements)

References 13 publications

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“…Because acrylic resin dentures are considered semi-critical articles, they should undergo high-level disinfection or sterilization (8). The results of this study showed that the peracetic acid-based disinfectant promoted not only disinfection but also sterilization of the acrylic resin specimens because it completely eliminated both test sporulated microorganisms (Bacillus subtilis and Bacillus stearothermophilus).…”

Section: Discussionmentioning

confidence: 80%

In Vivo and In Vitro evaluation of the efficacy of a peracetic acid-based disinfectant for decontamination of acrylic resins

2006

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The purpose of this study was to assess the antimicrobial efficacy of a peracetic acid-based disinfectant for decontamination of heatpolymerized, chemically activated and microwave-polymerized acrylic resins. Resin plates were contaminated in vivo upon intraoral use by 10 volunteers for 7 nights and slabs were contaminated in vitro by contact with Bacillus subtilis and Bacillus stearothermophilus. The contaminated acrylic resin specimens were immersed in a 0.2% peracetic acid-based disinfectant (Sterilife ® ; Lifemed) for 5 min or 10 min and placed in a BHI culture medium. After incubation at 37°C for 48 h, bacterial growth was assessed by analyzing turbidity of the medium. For all types of acrylic resin, no turbidity of the medium was observed for any of the resin specimens immersed in the peracetic acid-based disinfectant for either 5 or 10 min. On the other hand, the media with specimens that were not immersed in the disinfectant (control) showed turbidity in 100% of the cases, indicating the presence of microorganisms in both tested conditions. In conclusion, immersion for at least 5 min in a 0.2% peracetic acid-based disinfectant promoted high-level disinfection of heatpolymerized, chemically activated and microwave-polymerized acrylic resins contaminated with either human saliva or Bacillus subtilis or Bacillus stearothermophilus.

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Section: Discussionmentioning

confidence: 80%

In Vivo and In Vitro evaluation of the efficacy of a peracetic acid-based disinfectant for decontamination of acrylic resins

2006

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“…Disinfection procedures should not cause dimensional changes or distortion of the acrylic resin denture base, otherwise the stability, retention and durability of the complete dentures can be compromised (8).…”

Section: Introductionmentioning

confidence: 99%

Effect of microwave disinfection on physical and mechanical properties of acrylic resins

et al. 2008

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This study evaluated the effect of microwave energy on the hardness, impact strength and flexural strength of the Clássico, Onda-Cryl and QC-20 acrylic resins. Aluminum die were embedded in metallic or plastic flasks with type III dental stone, in accordance with the traditional packing technique. A mixing powder/liquid ratio was used according to the manufacturer's instructions. After polymerization in water batch at 74ºC for 9 h, boiling water for 20 min or microwave energy at 900 W for 10 min, the specimens were deflasked after flask cooling at room temperature, and submitted to finishing. Specimens non-disinfected and disinfected by microwave irradiation were submitted to hardness, impact and flexural strength tests. Each specimen was immersed in distilled water and disinfected in a microwave oven calibrated to 650 W for 3 min. Knoop hardness test was performed with 25 g load for 10 s, impact test was carried out using the Charpy system with 40 kpcm, and 3-point bending test with a crosshead speed of 0.5 mm/min until fracture. Data were submitted to statistical analysis by ANOVA and Tukey's test =0.05). Disinfection by microwave energy decreased the hardness of Clássico and Onda-Cryl acrylic resins, but no effect was observed on the impact and flexural strength of all tested resins.

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“…Treatment in microwave oven at 604 W for 10 min produced the greatest discrepancies in the adaptation of maxillary acrylic resin denture bases to the stone casts [19]. Disinfection by microwave energy improved denture base adaptation when the traditional flask closure method was used, but did not alter the base adaptation in the restrictive flask closure method [20].…”

Section: Introductionmentioning

confidence: 95%

Effect of Different Simulated Microwave Disinfection Cycles on Hardness, Roughness and Gloss of Acrylic Resins

Capla¹,

Rlx²

2017

IJDOS

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Effect of microwave treatments on dimensional accuracy of maxillary acrylic resin denture base

Cited by 49 publications

References 13 publications

In Vivo and In Vitro evaluation of the efficacy of a peracetic acid-based disinfectant for decontamination of acrylic resins

In Vivo and In Vitro evaluation of the efficacy of a peracetic acid-based disinfectant for decontamination of acrylic resins

Effect of microwave disinfection on physical and mechanical properties of acrylic resins

Effect of Different Simulated Microwave Disinfection Cycles on Hardness, Roughness and Gloss of Acrylic Resins

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