Fit of pressed crowns fabricated from two CAD-CAM wax pattern process plans: A comparative in vitro study

Shamseddine, Loubna; Mortada, Rola; Rifaï, Khaldoun; Chidiac, José Johann

doi:10.1016/j.prosdent.2016.10.003

Cited by 28 publications

(25 citation statements)

References 54 publications

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“…8). These results confirm the findings of [6,14,15]. The gaps values of the conventionally cast bridges have the highest variations, followed by the SLM bridges and samples, cast with 3D printed patterns.…”

Section: Referencessupporting

confidence: 91%

“…The gaps values of the conventionally cast bridges have the highest variations, followed by the SLM bridges and samples, cast with 3D printed patterns. Concerning to the gap values in the marginal and occlusal regions of the SLM and conventionally cast bridges, they are in accordance with the results of Huang Z, et al [1], Tamac E, et al [4] and Shamseddine L, et al [14]. This study proves that the internal gap variations are strongly influenced by the technological processes.…”

Section: Referencessupporting

confidence: 90%

“…[4,14] This technique models the marginal and internal discrepancy between the restoration and prepared teeth with elastomeric impression materials -silicone, polyether. [1,6,10,[13][14][15] The silicone replica technique can be used for in vivo measurement the adaptation of the indirect restorations just before luting. [4] In clinical conditions, the force,applied on the crown, lined with light viscosity silicone, cannot be standardized.…”

Section: Introductionmentioning

confidence: 99%

“…Most authors consider that precise results may be obtained by using scanning electron microscopy (SEM). [11,14] In laser videography, the light-bodied silicone replica is digitized along with the die. This method is mostly used to measure the internal gap, while it is not too reliable for identification the reference points, necessary to measure the marginal fit.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the authors accept that approximately50 measurements for marginal discrepancy values yield clinically relevant information. [11,14,21] The marginal fit values of the Co-Cr dental restorations greatly depend on the fabrication methods and, occasionally, on the alloy systems [10]. The most common technology for production of Co-Cr dental constructions is a lostwax process, in which the metal framework is cast using hand-made wax pattern.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Investigation the Fitting Accuracy of Cast and SLM Co-Cr Dental Bridges Using Cad Software

Dikova¹,

Vasilev²,

Dzhendov³

et al. 2017

JofIMAB

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ABSTRACT:The aim of the present paper is to investigate the fitting accuracy of Co-Cr dental bridges, manufactured by three technologies, with the newly developed method using CAD software. The four-part dental bridges of Co-Cr alloys were produced by conventional casting of wax models, casting with 3D printed patterns and selective laser melting. The marginal and internal fit of dental bridges was studied out by two methods -silicone replica test and CAD software. As the silicone replica test characterizes with comparatively low accuracy, a new methodology for investigating the fitting accuracy of dental bridges was developed based on the SolidWorks CAD software. The newly developed method allows the study of the marginal and internal adaptation in unlimited directions and high accuracy. Investigation the marginal fit and internal adaptation of CoCr four-part dental bridges by the two methods show that the technological process strongly influences the fitting accuracy of dental restorations. The fitting accuracy of the bridges, cast with 3D printed patterns, is the highest, followed by the SLM and conventionally cast bridges. The marginal fit of the three groups of bridges is in the clinically acceptable range. The internal gap values vary in different regions -it is highest on the occlusal surfaces, followed by that in the marginal and axial areas. The higher fitting accuracy of the bridges, manufactured by casting with 3D printed patterns and SLM, compared to the conventionally cast bridges is a good precondition for their successful implementation in the dental offices and laboratories.

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Section: Referencessupporting

confidence: 91%

Section: Referencessupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Investigation the Fitting Accuracy of Cast and SLM Co-Cr Dental Bridges Using Cad Software

Dikova¹,

Vasilev²,

Dzhendov³

et al. 2017

JofIMAB

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Specifics in Production of Fixed Partial Dentures Using 3D Printed Cast Patterns

Dikova

2019

Computational and Experimental Approaches in Materials Science and Engineering

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Present paper deals with the specifics in production of fixed partial dentures (FPD) using 3D printed cast patterns. The cast patterns of four-part dental bridges were manufactured of polymer NextDent Cast using RapidShape D30 printer. Two cases of application of cast patterns were discussedfor production of press-ceramic and metallic constructions. The metallic samples were cast by centrifugal casting of Co-Cr and Ni-Cr dental alloys using different investment materials and heating regimes of the casting mold. The dimensions of polymeric cast patterns and cast bridges were measured. It was established that for production of FPD with high accuracy and high adhesion of porcelain coating, precise cast patterns should be manufactured by 3D printing. The dimensions of virtual model should be corrected with coefficients, specific for each axis. The increased roughness of 3D printed cast patterns is disadvantage in dental constructions with high smoothness requirements and advantage for metal-ceramic FPD. Therefore, the position of patterns with respect to the building direction should be different for FPD of press-ceramics and cast infrastructures for metal-ceramics. In the first, vertical axes of teeth must be parallel to the print direction Z-axis, and in the second, they have to be at an angle between 45°-70°to the base. For ensuring high adhesion strength of porcelain coating in metal-ceramic restorations, surface smoothing operations should not be applied to 3D printed cast patterns. The revealed specifics would be very useful in dental practice for manufacturing of accurate FPD using 3D printed cast patterns.

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The Effect of Different Materials and Techniques on Stress Distribution in CAD/CAM Endocrowns

Eskitaşçıoğlu

Küçük²,

Eskitaşçıoğlu

et al. 2020

Strength Mater

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Fit of pressed crowns fabricated from two CAD-CAM wax pattern process plans: A comparative in vitro study

Cited by 28 publications

References 54 publications

Investigation the Fitting Accuracy of Cast and SLM Co-Cr Dental Bridges Using Cad Software

Investigation the Fitting Accuracy of Cast and SLM Co-Cr Dental Bridges Using Cad Software

Specifics in Production of Fixed Partial Dentures Using 3D Printed Cast Patterns

The Effect of Different Materials and Techniques on Stress Distribution in CAD/CAM Endocrowns

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