Effect of Flasking and Polymerization Techniques on Tooth Movement in Complete Denture Processing

Shibayama, Ricardo; Filho, Humberto Gennari; Mazaro, José Vítor Quinelli; Vedovatto, Eduardo; Assunção, Wirley Gonçalves

doi:10.1111/j.1532-849x.2008.00421.x

Cited by 31 publications

(39 citation statements)

References 21 publications

(99 reference statements)

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“…Such methods have been widely used to simulate masticatory efforts and can also be adapted to perform stability measurements. The AutoCAD software was developed to create graphics in engineering and physics [22] and is currently applied in medicine and dentistry both in clinical [23] and laboratory [24] procedures. This software can provide quick and accurate measurements of digitally scanned samples.…”

Section: Introductionmentioning

confidence: 99%

Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer

et al. 2010

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BackgroundWe evaluated the influence of chemical disinfection and accelerated aging on the dimensional stability and detail reproduction of a silicone elastomer containing one of two opacifiers.MethodsA total of 90 samples were fabricated from Silastic MDX 4-4210 silicone and divided into groups (n = 10) according to opacifier content (barium sulfate or titanium dioxide) and disinfectant solution (neutral soap, Efferdent, or 4% chlorhexidine). The specimens were disinfected 3 times per week during 60 days and then subjected to accelerated aging for 1008 hours. Dimensional stability and detail reproduction tests were performed after specimens' fabrication (baseline), chemical disinfection and periodically during accelerated aging (252, 504, and 1008 hours). The results were analyzed using 3-way repeated-measures ANOVA and the Tukey HSD test (α = 0.05).ResultsAll groups exhibited dimensional changes over time. The opacifier (p = .314), period (p < .0001) and their interactions (p = .0041) affected the dimensional stability of the silicone. Statistical significant dimensional differences occurred between groups with (0.071) and without opacifiers (0.053). Accelerated aging influenced the dimensional stability of the samples. All groups scored 2 in the detail reproduction tests, which represents the fully reproducing of three test grooves with accurate angles.ConclusionsIncorporation of opacifiers alters the dimensional stability of silicones used in facial prosthetics, but seems to have no influence on detail reproduction. Accelerated aging is responsible for most of the dimensional changes in Silastic MDX4 4210, but all dimensional changes measured in this study remained within the limits of stability necessary for this application.

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Section: Introductionmentioning

confidence: 99%

Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer

et al. 2010

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“…This fact is assigned to acrylic resin shrinkage, 6 and to other factors that can cause changes in the denture base and in the teeth position during and after the prosthesis manufacturing. 7,8 By this reason, a classic study, 9 and other more recent 10,11 studies, verified the effect of methods and techniques to eliminate or minimize the dimensional changes arising from the laboratory processing, but without significant result or even relevance. Conventional dentures show some deficiencies in retention and stability, while the implant-supported prostheses present better stability due to retention promoted by the implants.…”

Section: Introductionmentioning

confidence: 94%

Teeth movement in denture and implant-supported prosthesis influenced by microwave flask systems

Sonehara

Mesquita

Barão

et al. 2015

Journal of Oral Biology and Craniofacial Research

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“…The American dental association specification indicated that microwave energy used for curing the acrylic resin further withstands to mechanical foundering than conventionally polymerized acrylic materials [5]. In comparison, the polymerization of heat-cured PMMA is usually carried out in a temperature-controlled water bath for at least 9 hours, while the processing by microwave reduced the period to just three minutes, resulting in the resin with the same finesse as those cured by water bath [6]. The method is fast and clean, and the final resulting product has better accuracy of fit, with a better adaptation of denture base [7].…”

Section: Introductionmentioning

confidence: 99%

TiO2-Nanofillers Effects on Some Properties of Highly- Impact Resin Using Different Processing Techniques

Aziz¹

2018

TODENTJ

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Background:The criteria of conventional curing of polymethyl methacrylate do not match the standard properties of the denture base materials.Objectives:This research was conducted to investigate the addition of TiO2 nano practical on impact strength, thermal conductivity and color stability of acrylic resin cured by microwave in comparison to the conventional cured of heat-polymerized acrylic resin.Materials and Methods:120 specimens made of high impact acrylic resin were divided into two main groups according to the type of curing (water bath, microwave), then each group was subdivided into two groups according to the addition of 3% TiO2 nano-fillers and control group (without the addition of TiO2 0%). Each group was subdivided according to the type of test into 3 groups with 10 specimens for each group. Data were statistically analyzed using Student t-test to detect the significant differences between tested and control groups at significance level (P<0.05).Results:According to curing type methods, the results showed that there was a significant decrease in impact strength of microwaved cured resin, but there was no significant difference in the thermal conductivity and color stability of resin. In addition, by using nanofiller, there was a significant increase in the impact strength and color stability with the addition of 3% TiO2 nanofillers, but no significant difference was found in the thermal conductivity of the acrylic resin.Conclusion:The microwave curing of acrylic resin had no change in the color stability and thermal conductivity in comparison to the water bath, but the impact strength was decreased. The addition of 3% TiO2 improved the impact and the color stability, but the thermal conductivity did not change.

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Effect of Flasking and Polymerization Techniques on Tooth Movement in Complete Denture Processing

Cited by 31 publications

References 21 publications

Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer

Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer

Teeth movement in denture and implant-supported prosthesis influenced by microwave flask systems

TiO2-Nanofillers Effects on Some Properties of Highly- Impact Resin Using Different Processing Techniques

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