The effect of surface moisture on detail reproduction of elastomeric impressions

Johnson, Glen H.; Lepe, Xavier; Aw, Tar C.

doi:10.1016/s0022-3913(03)00429-3

Cited by 64 publications

(44 citation statements)

References 13 publications

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“…As PVS materials are generally hydrophobic, 25 the measurement of surface detail on a wet or moist surface has shown to reduce its detail reproduction. 26,27 Additional properties of alginate substitutes, such as contact angle, elastic deformation, and recovery and flow measurement must be compared to traditional PVS materials in order to completely characterize these materials. Ultimately, clinical testing of these materials must be performed to determine the range of their clinical applications.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Outgassing, Tear Strength, and Detail Reproduction in Alginate Substitute Materials

Baxter¹,

Lawson²,

Çakır³

et al. 2012

Operative Dentistry

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Alginate substitute materials are inexpensive polyvinyl siloxane (PVS) impression materials that exhibit better detail reproduction and tear strength than alginate. Alginate substitute materials do show slightly more outgassing and resulting cast porosity than traditional alginates, particularly when they are poured soon after mixing. To reduce cast surface porosity, a minimum pouring delay of 60 minutes is suggested. SUMMARYObjective: To compare three alginate substitute materials to an alginate impression material for cast surface porosity (outgassing), tear strength, and detail reproduction.Materials and Methods: Detail reproduction tests were performed following American National Standards Institute/American Dental Association (ANSI/ADA) Specification No. 19. To measure tear strength, 12 samples of each material were made using a split mold, placed in a water bath until testing, and loaded in tension until failure at a rate of 500 mm/min using a universal testing machine. For cast surface porosity testing, five impressions of a Teflon mold with each material were placed in a water bath (37.88C) for the in-mouth setting time and poured with vacuum-mixed Silky Rock die stone at 5, 10, 30, and 60 minutes from the start of mixing. The gypsum samples were analyzed with a digital microscope for surface porosity indicative of hydrogen gas release by comparing the surface obtained at each interval with four casts representing no,

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Section: Discussionmentioning

confidence: 99%

Evaluation of Outgassing, Tear Strength, and Detail Reproduction in Alginate Substitute Materials

Baxter¹,

Lawson²,

Çakır³

et al. 2012

Operative Dentistry

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“…High precision impression materials, like polyether, vinyl polyether silicone, and vinyl polysiloxane in combination with stone casts, could offer an acceptable procedure to transfer clinical situation to the dental laboratory [3,4,5,6,7]. However, several potential errors may occur during this procedure, such as deficiencies on impressions and stone casts; volume changes of impressions and stone casts during disinfection, storage and transportation; partial or extensive separation of the impression material from the tray; the effects of surface moisture on detail reproductions of the impressions [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

“…However, several potential errors may occur during this procedure, such as deficiencies on impressions and stone casts; volume changes of impressions and stone casts during disinfection, storage and transportation; partial or extensive separation of the impression material from the tray; the effects of surface moisture on detail reproductions of the impressions [3,4,5,6]. In addition, conventional impression-taking may cause patients’ discomfort like nausea, unpleasant taste, breathing difficulty and teeth sensitivity [8].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Digital Impressions and Fitness of Single Crowns Based on Digital Impressions

Yang

Liu

et al. 2015

Materials

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In this study, the accuracy (precision and trueness) of digital impressions and the fitness of single crowns manufactured based on digital impressions were evaluated. #14-17 epoxy resin dentitions were made, while full-crown preparations of extracted natural teeth were embedded at #16. (1) To assess precision, deviations among repeated scan models made by intraoral scanner TRIOS and MHT and model scanner D700 and inEos were calculated through best-fit algorithm and three-dimensional (3D) comparison. Root mean square (RMS) and color-coded difference images were offered. (2) To assess trueness, micro computed tomography (micro-CT) was used to get the reference model (REF). Deviations between REF and repeated scan models (from (1)) were calculated. (3) To assess fitness, single crowns were manufactured based on TRIOS, MHT, D700 and inEos scan models. The adhesive gaps were evaluated under stereomicroscope after cross-sectioned. Digital impressions showed lower precision and better trueness. Except for MHT, the means of RMS for precision were lower than 10 μm. Digital impressions showed better internal fitness. Fitness of single crowns based on digital impressions was up to clinical standard. Digital impressions could be an alternative method for single crowns manufacturing.

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“…changes in phase angle and storage modulus during setting) within the MrWT. [3][4][5][6][7][8][9][10][11] Therefore, the aim of this study was to test whether there is any significant correlation between those material characteristics and the results obtained from the SFT within the MrWT.…”

Section: Introductionmentioning

confidence: 99%

Shark fin test and impression quality: A correlation analysis

Balkenhol¹,

Wöstmann²,

Kanehira³

et al. 2007

Journal of Dentistry

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The effect of surface moisture on detail reproduction of elastomeric impressions

Cited by 64 publications

References 13 publications

Evaluation of Outgassing, Tear Strength, and Detail Reproduction in Alginate Substitute Materials

Evaluation of Outgassing, Tear Strength, and Detail Reproduction in Alginate Substitute Materials

Accuracy of Digital Impressions and Fitness of Single Crowns Based on Digital Impressions

Shark fin test and impression quality: A correlation analysis

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