The influence of postpouring time on the roughness, compressive strength, and diametric tensile strength of dental stone

Cesero, Leonardo de; Mota, Eduardo Gonçalves; Burnett, Luiz Henrique; Spohr, Ana Maria

doi:10.1016/j.prosdent.2013.07.032

Cited by 12 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…So, storing alginate impressions for five days prior to pouring did't alter the surface detail replication. Contrary to our results, De Cesero L et al (33) (2014) concluded that Surface roughness increased significantly with time after pouring, when the Surface roughness was evaluate at 1, 24 hours, in addition to 7 days after casting with stone.…”

Section: Discussioncontrasting

confidence: 99%

The Effect of disinfection of Extended-Pour alginate impressions on the surface roughness of stone casts

Matar

2018

Egyptian Dental Journal

View full text Add to dashboard Cite

The study aimed to estimate the influence of disinfection of impression material (Hydrogum 5 extended-Pour alginates) on the surface roughness of the resulting casts. Materials and Methods: In this study, 40 alginate impressions using Hydrogum 5 extended-Pour alginates. The impressions were divided into four groups according to different time of storage and pouring intervals: one, six, 12 and 24 hours. Each time interval has ten impressions which were divided into two groups (control and study) each group has five impressions which stored in sealed plastic bags then casting with dental stone. In control groups the impressions stored without disinfection and in study groups the impressions were sprayed with (AHD 2000) ready-made commercial disinfectant material then stored. Surface roughness test was measured for every specimen by (Mahr) Marsurf PS1Data analysis were done by Student T-test and ANOVA (P<0.05).Results: Extended-Pour alginates not significantly affected the surface roughness of the stone casts either with or without disinfection. Conclusion: This study demonstrated that casting may be postpone up to 24 hours using Hydrogum 5 extended-Pour alginates. likewise pouring after disinfectant.

show abstract

Section: Discussioncontrasting

confidence: 99%

The Effect of disinfection of Extended-Pour alginate impressions on the surface roughness of stone casts

Matar

2018

Egyptian Dental Journal

View full text Add to dashboard Cite

show abstract

“…A significant difference in roughness was found by De Cesero et al .,[29] between Durone specimens at 1 hour and at 24 hours; however, the difference was not significant between 24 hours and 7 days.…”

Section: Discussionmentioning

confidence: 81%

“…[5172936] The fast drying with microwaves achieves the properties found with drying at room temperature. [535] The diametral compression assays were carried out 7 days after the obtaining of the samples (dried die samples).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the mechanical behavior and surface rugosity of different dental die materials

Niekawa¹,

Kreve²,

Ávila³

et al. 2017

J Int Soc Prevent Communit Dent

View full text Add to dashboard Cite

Aim:This work evaluated the mechanical and surface behavior of different die materials. The studied materials are polyurethane resin Exakto-Form (Bredent), Gypsum type IV, Fuji Rock EP (Gc), and Durone (Dentsply).Materials and Methods:Two metallic matrices molded in polyvinyl siloxane provided 30 cylindrical test specimens for the diametral compression test and 30 hemispherical test specimens for the surface rugosity test. The cylindrical test specimens were submitted to tests of diametral compression strength using a DL2000 universal assay machine, with a load cell of 2000 Kgf and constant speed of 1 mm/min connected to the software. Kruskal–Wallis and Dunn's nonparametric tests were used to analyze the results. The hemispheres were submitted to the surface rugosity assay using a SJ201-P rugosimeter with a sensitivity of 300 μm, speed of 0.5 mm/s, and cut-off of 0.8 mm, and the readings were taken on the convex surface of the test specimens and metallic matrix. Results were analyzed using with Fisher's least significant differences test (LSD) and Dunnett's test.Results:Kruskal–Wallis test showed significant difference between die materials for diametral compression strength (P = 0.002). Dunn's test showed significantly higher values for modified polyurethane resin (Exakto-Form). The gypsum type IV, which did not significantly differ regarding diametral compression strength, showed 34.0% (Durone) and 42.7% (Fuji Rock) lower values in comparison to Exakto-Form.Conclusion:Within the parameters adopted in this study, it is possible to conclude that Exakto-Form polyurethane resin showed higher resistance to compression and was closer to the metallic matrix rugosity, and, along with the gypsum type IV Durone, showed better reproducibility of details relative to the Fuji Rock.

show abstract

“…De Cesero et al [12] suggested that Surface roughness, compressive strength, and diametric tensile strength of of dental stone were assessed at 1 hour, 24 hours, and 7 days after pouring. Surface roughness, diametric tensile strength and compressive strength increased significantly with time after pouring.…”

Section: Discussionmentioning

confidence: 99%

The Linear Setting Expansions of the Dental Stone and Whose Initial Setting Times

Yanikoglu¹

2015

Dentistry

View full text Add to dashboard Cite

shortened by using various different slurry water concentrations with the changes of setting expansions of the plaster of paris and two other brands of dental stones with normal time duration by using distilled and tap water. The null hypothesis tested was that there is shortened setting time of dental stones by using various different slurry water concentrations. Methodology In this study, two improved dental stones were used to fabricate master casts and dies. The tested fabrications were BegoStone (Bego Bremer, Goldschlägerei Wilh. Herbst GmbH and Co. Wilhelm Herbst-Strabe 1 D 28359 Bremen Germany), Moldano (Heraeus Kulzer GmbH and Co. KG Gruner Weg 11 D-63450 Hanau Germany) and plaster of paris (BMT, PK 121 Sivas, Turkey). Together with the manufacturer's values, the setting time and setting expansion amounts of the dental stone and plaster used in this study are shown in Table 1. Distilled water (Hinckley and Schmidt, Chicago, Ill. USA), tap water and slurry water prepared with the volume ratio of 16% and 2% were used as liquid for mixing the dental stone and plaster. In order

show abstract

The influence of postpouring time on the roughness, compressive strength, and diametric tensile strength of dental stone

Cited by 12 publications

References 12 publications

The Effect of disinfection of Extended-Pour alginate impressions on the surface roughness of stone casts

The Effect of disinfection of Extended-Pour alginate impressions on the surface roughness of stone casts

Analysis of the mechanical behavior and surface rugosity of different dental die materials

The Linear Setting Expansions of the Dental Stone and Whose Initial Setting Times

Contact Info

Product

Resources

About