Marginal Fit of Electroformed Ceramometal Crowns

Holmes, J. R.; Pilcher, Elizabeth S.; Rivers, James A.; Stewart, R. McQuay

doi:10.1111/j.1532-849x.1996.tb00284.x

Cited by 25 publications

(22 citation statements)

References 9 publications

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“…The manufacture of metal-ceramics crowns by the technique of lost-wax casting involves a series of laboratories steps (infrastructure waxing, inclusion, wax elimination, metal alloy casting, finishing and polishing) that negatively affect the prosthetic restorations sealing when compared with the electroformed crowns, as observed by Holmes et al (19).…”

Section: Discussionmentioning

confidence: 96%

“…Ten dies from each master model were made using vacuum mixed type IV plaster (Elite Rock Thixotropic; Zhermack S.p.A.) following the manufacturer's instructions. The die preparations received two layers of a yellow die spacer (7 μm; Yeti Dental Produkte GmbH, Engen, Germany) up to 1 mm before the margin (19).…”

Section: Methodsmentioning

confidence: 99%

“…There are, in the literature, several methods of gap measurements (5,7,8,12,(14)(15)(16)(17)(18)(19)(20) and no agreement of which is the most accurate way. The measuring of marginal gap using light microscopy has been widely used (8,15,17,21) with variation in the magnitude of the microscope and number of measurement per sample.…”

Section: Introductionmentioning

confidence: 99%

“…The marginal gap of metal-ceramic crowns has been the focus of various investigations (5,7,8,(13)(14)(15)(16)(17)(18)(19)(20). There are, in the literature, several methods of gap measurements (5,7,8,12,(14)(15)(16)(17)(18)(19)(20) and no agreement of which is the most accurate way.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Finish Line on Marginal Fit of Sintered Gold Copings

et al. 2013

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The aim of this study was to evaluate the vertical marginal gap of sintered gold copings and metal-ceramic crowns with different finish line preparations: a beveled round shoulder (BRS) and a beveled long chamfer (BLC), testing the null hypotheses that there are no differences in marginal gap regardless of finish line and phase of restoration (coping or crown). Stainless steel master models were fabricated to simulate tooth preparation for metal-ceramic crowns with different finish lines (BRS and BLC). Ten dies were obtained from each model. Preparations were coated with 2 layers of spacer to 1 mm from the margin. Sintercast gold copings were prepared, sintered and adjusted to the dies. The copings (n=10) were placed onto the master model and the marginal gap was measured in 24 equidistant points using optical microscopy (X230). An opaque and two body ceramic layers were subsequently applied to the copings and the same measuring procedure was performed for the crowns. The data were analyzed statistically using paired and unpaired Student's t-test (α=0.05). Mean marginal gap values (μm) for the copings and crowns were, respectively: 113.6 and 117.1 for the BRS; and 58.2 and 74.3 for the BLC preparation. Significantly greater marginal gaps (p=0.0307) were found for restorations with BRS than with BLC finish line, which also showed statistically significant differences in the gap size between coping and crown (p=0.001). In conclusion, marginal gap is influenced by ceramic application on copings fabricated on BLC preparation, and greater marginal gaps were found for restorations with BRS finish line, rejecting the experimental null hypotheses.

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Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Finish Line on Marginal Fit of Sintered Gold Copings

et al. 2013

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“…The ratio of porcelain to the thickness of the metal structure of a crown is 1.7:1, whilst in case of galvanized prosthetic restorations, it is 4:1 [6,7,14]. This means that there is a possibility of a much more efficient preparation of the tooth tissues [21].…”

Section: Discussionmentioning

confidence: 99%

A comparison of the traditional casting method and the galvanoforming technique in gold alloy prosthetic restorations

Sarna‐Boś

Batyra

Oleszek-Listopad

et al. 2015

Current Issues in Pharmacy and Medical Sciences

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Gold is a dental material with very good mechanical properties. It is also aesthetic and biocompatible with the tissues of the oral cavity even at 100% purity. Prosthetic restorations made of pure gold or its alloys can be practiced either through a normal casting, as well as through using the galvanoforming technique. The electrolytic method was first introduced into dentistry about 20 years ago and it allows for producing "pure" gold (which means 99.99% Au). The lack of additions of other metals improves the properties of dental prostheses, such as marginal tightness, esthetics, biocompatibility, and it helps in eliminating any allergic reactions. The literature review presented in this paper is a comparison of the traditional casting method with the newer galvanoforming technique.

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