Linear dimensional accuracy of epoxy resin and stone dies

Schwartz, Harry B.; Leupold, Robert J.; Thompson, Van P.

doi:10.1016/0022-3913(81)90422-4

Cited by 14 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The contraction on setting was found to be 10 times greater for Durcupati than for Metapox. These findings are confirmed by other studies on the dimensional accuracy of models made of epoxy resins (9).…”

Section: Discussionsupporting

confidence: 88%

Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

Ekfeldt

Fløystrand

Oilo

1985

European J Oral Sciences

View full text Add to dashboard Cite

– In order to obtain a replica technique suitable for a complete or segments of a dental arch two different impression materials were combined with two epoxy resin model materials. The models were examined and photographed in an optical microscope and a scanning electron microscope. No systematic differences were found between the used combinations of materials except a tendency towards greater contraction of one of the model materials. The A‐silicone impression materials combined with one of the epoxy resin material seemed to be the easiest to handle and to give the best models.

show abstract

Section: Discussionsupporting

confidence: 88%

Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

Ekfeldt

Fløystrand

Oilo

1985

European J Oral Sciences

View full text Add to dashboard Cite

show abstract

“…[ 2 ] The die material should be compatible with the impression material. [ 23 ] Casts poured in dental stones should be accurate in every respect, dimensionally stable over time, hard enough to withstand the fabrication process, resistant to the inadvertent abrasions caused by fabrication, and have a surface wettability compatible with the waxing process. [ 8 ]…”

Section: Discussionmentioning

confidence: 99%

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

“…The fourth factor is the displacement of each abutment replica in the definitive cast because of the dimensional change of the dental stone. Many studies are available analyzing this issue . This study used type IV dental stone.…”

Section: Discussionmentioning

confidence: 99%

“…The fabrication of master casts for conventional crowns and fixed partial dentures (FPDs) has been well reported . Studies on the materials used in master cast fabrication have reported acceptable accuracy for clinical use in crowns and FPDs, but to date no studies have demonstrated that master casts accurately reproduce the dimensions of the oral cavity . However, the periodontium can allow for adjustments of minor distortions, especially in FPDs, and the cement will fill in the residual gaps between the casting and the abutment tooth.…”

mentioning

confidence: 99%

A Comparative Study of the Accuracy between Plastic and Metal Impression Transfer Copings for Implant Restorations

Fernandez

Mendoza

Platt

et al. 2013

Journal of Prosthodontics

View full text Add to dashboard Cite

show abstract

Linear dimensional accuracy of epoxy resin and stone dies

Cited by 14 publications

References 4 publications

Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

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

A Comparative Study of the Accuracy between Plastic and Metal Impression Transfer Copings for Implant Restorations

Contact Info

Product

Resources

About