Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Zarea, Kourosh; Sughaireen, Mohamed G

doi:10.5005/jp-journals-10024-1036

Cited by 5 publications

(5 citation statements)

References 20 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Changes in the distances between the abutments can compromise the marginal adaptation of fixed prostheses [14]. Values similar to those obtained in the present study have been found with variations of up to 20 μ m for the distance between abutments [4, 7–9]. …”

Section: Discussionsupporting

confidence: 86%

“…In this study, casts obtained from the first pour, at one hour, the results found showed smaller variations than those shown in other studies, in which the same impression technique was used [9]. In one such study, variations were 110 μ m for the diameter of the abutment, 50 μ m for the height of the abutment, and 50 μ m for the distance between abutments [10].…”

Section: Discussionmentioning

confidence: 57%

See 1 more Smart Citation

Dimensional Accuracy of Stone Casts Obtained with Multiple Pours into the Same Mold

et al. 2012

View full text Add to dashboard Cite

Aim. The aim of the present study was to compare the dimensional accuracy of stone casts obtained with vinyl polysiloxane molds through the double-impression technique with three pours into the same mold. Methods. A stainless steel master model was constructed simulating a three-unit fixed prosthesis. Twelve impressions were taken of this master model with addition silicone, using the double-impression technique. Three pours of type IV gypsum were then made into each mold, thus producing 36 casts. The pours were made 1 hour, 6 hours and 24 hours after the impression procedure. Next, intra- and interabutment measurements were made in a coordinate measuring machine. Results. Comparative analysis of the dimensional accuracy of stone casts resulting from multiple pours was not statistically significant in pours first and second (P > 0.05). These values, however, were statistically significant at third pour in the height in abutment 1 and upper distance interabutment. Conclusion. The wait time (1 hour, and 6 hours) observed before pouring the stone into the same molds did not cause significant dimensional accuracy of the casts.

show abstract

Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 57%

Dimensional Accuracy of Stone Casts Obtained with Multiple Pours into the Same Mold

et al. 2012

View full text Add to dashboard Cite

show abstract

“…1 The material is divided into two pastes, base and catalyst. Crosslinking occurs when the vinyl groups react with the hydride groups, which are catalyzed by platinum without generating by-products.…”

Section: Introductionmentioning

confidence: 99%

Influence of different fillers on the properties of an experimental vinyl polysiloxane

Meincke

Ogliari

2016

Braz. oral res.

View full text Add to dashboard Cite

The aim of the study was to evaluate the effect of the incorporation of different fillers on an experimental vinyl polysiloxane (VPS) at two different concentrations, 20% and 40%. Different fillers were added to an experimental VPS. The study was developed in two stages: (i) incorporation of fillers in different concentrations: (a) 20 wt% fillers, and (b) 40 wt%. The fillers were added to experimental VPS and mixed with a speed mixer; (ii) characterization of experimental VPS; after the base paste and catalyst paste were mixed, the experimental VPS was used to make specimens specifically for each test, which were stored at 23°C for 24 hours. The tests were designed according to the specific standardization for the analysis of tensile strength, detail reproduction, Shore A hardness, and elastic recovery. For analysis of filler size pattern, scanning electron microscopy at 1500× magnification was used. The aerosil OX-50 40% (AE), and pure aluminum hydroxide 40% (PAH) groups presented the highest tensile strength and Shore A hardness values. However, those were the only groups that did not present continuous detail reproduction of an intersection of 20 μm line. The elastic recovery was not statistically significant. The undesirable characteristics of VPS (lowest Shore A hardness and tensile strength) were observed when it was added to the composition of acrylic polymer (AP) and fiberglass (FG) in both concentrations, 20% and 40%. In groups AE and PAH, agglomerates of nanofillers were shown in SEM micrography, while the other groups presented different shapes and fillers sizes.

show abstract

“…With silicone, storage conditions and dimensional accuracy are not a problem 16 and the silicone moulds can be used for more than one TR. Castelnuovo and Tjan 7 found a cooling effect of putty silicone moulds when they had been previously cooled in a fridge for 30 minutes but not when the mould was at room temperature.…”

Section: Discussionmentioning

confidence: 99%

Influence of the material for preformed moulds on the polymerization temperature of resin materials for temporary FPDs

et al. 2017

View full text Add to dashboard Cite

PURPOSETemperature increase of 5.5 ℃ can cause damage or necrosis of the pulp. Increasing temperature can be caused not only by mechanical factors, e.g. grinding, but also by exothermic polymerization reactions of resin materials. The aim of this study was to evaluate influences of the form material on the intrapulpal temperature during the polymerization of different self-curing resin materials for temporary restorations.MATERIALS AND METHODS30 provisonal bridges were made of 5 resin materials: Prevision Temp (Pre), Protemp 4 (Pro), Luxatemp Star (Lux), Structure 3 (Str) and an experimental material (Exp). Moulds made of alginate (A) and of silicone (S) and vacuum formed moulds (V) were used to build 10 bridges each on a special experimental setup. The intrapulpal temperatures of three abutment teeth (a canine, a premolar, and a molar,) were measured during the polymerization every second under isothermal conditions. Comparisons of the maximum temperature (TMax) and the time until the maximum temperature (tTMax) were performed using ANOVA and Tukey Test.RESULTSUsing alginate as the mould material resulted in a cooling effect for every resin material. Using the vacuum formed mould, TMax increased significantly compared to alginate (P<.001) and silicone (P<.001). In groups Lux, Pro, and Pre, tTMax increased when the vacuum formed moulds were used. In groups Exp and Str, there was no influence of the mould material on tTMax.CONCLUSIONAll of the mould materials are suitable for clinical use if the intraoral application time does not exceed the manufacturer's instructions for the resin materials.

show abstract

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Cited by 5 publications

References 20 publications

Dimensional Accuracy of Stone Casts Obtained with Multiple Pours into the Same Mold

Dimensional Accuracy of Stone Casts Obtained with Multiple Pours into the Same Mold

Influence of different fillers on the properties of an experimental vinyl polysiloxane

Influence of the material for preformed moulds on the polymerization temperature of resin materials for temporary FPDs

Contact Info

Product

Resources

About