Direct Filling Resins: Dimensional Changes Resulting from Polymerization Shrinkage and Water Sorption

Smith, D.L.; Schoonover, I.C.

doi:10.14219/jada.archive.1953.0089

Cited by 60 publications

(16 citation statements)

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“…19 Also, it is unable to measure the total shrinkage of chemically-activated resins because they must be mixed prior to placement into the dilatometer. 26 Even using a modified dilatometer, as much as 90 s is required for mixing, specimen placement, and calibration before the first measurements can be made. 27 Lai and Johnson 17 further modified the dilatometer so that water could be used in place of mercury.…”

Section: Discussionmentioning

confidence: 99%

Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Tiba¹,

Charlton²,

Vandewalle

et al. 2005

Journal of Dentistry

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Section: Discussionmentioning

confidence: 99%

Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Tiba¹,

Charlton²,

Vandewalle

et al. 2005

Journal of Dentistry

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“…[13][14][15] It was reported that water absorption caused the materials to swell and thus possibly compensated for the polymerization shrinkage and improved the cavity wall seal. The results from the polymeric materials shown in Figure 5 reflected the polymerization shrinkage that predominated for the initial period of the study.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Microleakage Using a Conductimetric Technique

Jacobsen

Fraunhofer

1975

J Dent Res

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“…Wide or short interface between canal and post (caused by ARPs without precision) would fill with too thick or thin layers of cement which are infirm to long term forces and might lead to fracture and failure of post and core [10-13]. Eames et al conducted a study about techniques to improve seating of the castings.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Time and Storage Environment on Dimensional Changes of Acrylic Resin Post Patterns

Nosouhian¹,

Sabouhi²,

Dakhilalian³

et al. 2015

TODENTJ

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Abstract:Introduction: Post and core are needed to regain retentions and functions after endodontic therapies. Also, risk of cross contamination from dental prosthesis is so high. The aim of this study was to compare dimensional changes of acrylic resin patterns (ARP) in three different storing environments. Materials and methods: conventional root canal therapy was done on one first premolar tooth and the canal filled with Guttapercha. 2/3 of the filling was expelled and 30 direct APRs were prepared by Duralay. The samples were divided into 3 groups based on storing environments: water, NaOCl 5% and air. Finally dimensional changes in coronoapical length (CAL), coronal (CD) and apical diameter (AD) of APRs were measured in 7 consecutive times (immediately after polymerization, 1, 2, 4, 8, 24, 48 hours later). All the data were analyzed by Paired T-test and Duncon test using SPSS software ver.13 at significant level of 0.05. Results: After 24 hours, the ARPs, which were stored in air, contracted 0.07, 0.06 and 0.12 mm in AD, CD and CAL; the ARPs, which were stored in water, showed 0.03, 0.06 and 0.12 mm decrease in AD, CD and CAL; But the ARPs, which were stored in NaOCl 5%, showed significant expansion in AD, CD and CAL (0.03, 0.06 and 0.10 mm) (all P values < 0.01). Conclusion: It is better not to use NaOCl for disinfecting; also the best time for storing APRs is 8 hours for water and 2 hours for air environments after setting time.

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Direct Filling Resins: Dimensional Changes Resulting from Polymerization Shrinkage and Water Sorption

Cited by 60 publications

References 1 publication

Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Assessment of Microleakage Using a Conductimetric Technique

The Effect of Time and Storage Environment on Dimensional Changes of Acrylic Resin Post Patterns

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