Effect of bench cooling on the dimensional accuracy of heat-cured acrylic denture base material

Kimoto, Suguru; Kobayashi, Norihiko; Kobayashi, Kihei; Kawara, Misao

doi:10.1016/j.jdent.2004.08.002

Cited by 21 publications

(22 citation statements)

References 19 publications

(19 reference statements)

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“…In the previous study, regarding the influence of cooling time, more linear deformation was observed in fast cooling group compared to slow cooling group. The reported reasons were, inadequate time to compensate contraction by water absorption, and lack of emission of stress inside the denture base caused during curing 18. Thus, this study was conducted after slowly cooling the denture bases for 24 hours in water.…”

Section: Discussionmentioning

confidence: 99%

Three dimensional deformation of dry-stored complete denture base at room temperature

Lim

Lee

2016

J Adv Prosthodont

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PURPOSEThe aim of this study was to evaluate whether there is any typical deformation pattern existing in complete denture when it was dried by using the 3D scanner and surface matching program.MATERIALS AND METHODSA total of 28 denture bases were fabricated with heat curing acrylic resin (each 14 upper and lower denture bases), and 14 denture bases (each 7 upper and lower denture bases) were stored in the water bottle (water stored), and another 14 denture bases were stored in the air (dry stored). Each specimen was scanned at 1st day after deflasking, 14th day after deflasking, and 28th day after deflasking, and digitalized. Three dimensional deformation patterns were acquired by comparison of the data within storage group using surface matching program. For evaluating differences between groups, these data were compared statisticallyusing Kruskal Wallis and Mann Whitney-U test (α=.05).RESULTSWhen evaluating 3D deformation of denture base, obvious deformations were not found in maxillary and mandibular water storage group. However, in dry stored group, typical deformation pattern was detected as storage time passes. It occurred mostly in first two weeks. Major deformations were found in the bilateral posterior area in both maxillary and mandibular group. In maxillary dry stored group, a statistical significance was found.CONCLUSIONIt was proved that in both upper and lower denture bases, dry storage caused more dimensional deformation than water storage with typical pattern.

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Section: Discussionmentioning

confidence: 99%

Three dimensional deformation of dry-stored complete denture base at room temperature

Lim

Lee

2016

J Adv Prosthodont

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“…However, other properties may be adversely affected by these disinfection methods. Among these properties, the dimensional stability is of utmost importance because it is closely related to the fit of the denture bases to the supporting tissues 8, 9…”

Section: Introductionmentioning

confidence: 99%

Linear dimensional changes of denture base and hard chair‐side reline resins after disinfection

Gonçalves

Machado

Giampaolo

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:Objectives: This study evaluated the effect of disinfection by immersion in sodium perborate (50°C/10 min) or microwave irradiation (650 W/6 min) on the linear dimensional change (LDC) of four reline resins (Kooliner-K, New Truliner-N, Tokuso Rebase Fast-T, Ufi Gel Hard-U) and one heat-polymerizing denture base resin (Lucitone 550-L). Methods: Specimens (50.0 mm diameter, 0.5 mm thickness) were made using a split mold with reference points, and divided into two controls and four test groups (n ϭ 8). The distances between the points were measured on the mold (baseline readings), and compared to those obtained from the specimens after: polymerization or immersion in water (37°C) for 7 days (controls); 2 or 7 cycles of disinfection by immersion or microwave irradiation. Results:The two-way ANOVA and Tukey's test (␣ ϭ 0.05) showed that microwave disinfection significantly increased the mean LDC of materials L (Ϫ1.43%), N (Ϫ1.27%) and K (Ϫ1.06%). Material N also exhibited a significant increase in LDC after two cycles of chemical disinfection (Ϫ0.73%). For U (Ϫ0.47%) and T (Ϫ0.21%) materials, no significant changes in LDC were found. Conclusions: Microwave disinfection increases the shrinkage of materials L, N, and K. The dimensional stability of resins U and T was not affected by the disinfection methods evaluated.

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“…The contour and position of the metal components of the Tecnoflask pose no risk of electrostatic discharge and are safe for use in the microwave as directed. Bench cool flask for a minimum 15 minutes, followed by immersion of the flask into cool water for a minimum of 10 minutes. Slower cooling will improve dimensional accuracy Divest prosthesis to complete finishing and polishing (Fig ). …”

Section: Techniquementioning

confidence: 99%

“…Bench cool flask for a minimum 15 minutes, followed by immersion of the flask into cool water for a minimum of 10 minutes. Slower cooling will improve dimensional accuracy …”

Section: Techniquementioning

confidence: 99%

Poly(methylmethacrylate) Microwave Processing: A Technique Paper

Selecman

Brodine

2019

Journal of Prosthodontics

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Microwave processing of a wax trial denture into a poly(methylmethacrylate) provides a viable alternative to conventional compression, injection, and digital techniques. This article briefly describes a processing technique that yields a complete dental prosthesis in under two hours using a combination of modern materials designed to reduce working and setting times without compromising the quality of the final prosthesis.

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Effect of bench cooling on the dimensional accuracy of heat-cured acrylic denture base material

Cited by 21 publications

References 19 publications

Three dimensional deformation of dry-stored complete denture base at room temperature

Three dimensional deformation of dry-stored complete denture base at room temperature

Linear dimensional changes of denture base and hard chair‐side reline resins after disinfection

Poly(methylmethacrylate) Microwave Processing: A Technique Paper

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