An In Vitro Evaluation of Fit of Zirconium‐Oxide‐Based Ceramic Four‐Unit Fixed Partial Dentures, Generated with Three Different CAD/CAM Systems, before and after Porcelain Firing Cycles and after Glaze Cycles

Vigolo, Paolo; Fonzi, Fulvio

doi:10.1111/j.1532-849x.2008.00366.x

Cited by 102 publications

(98 citation statements)

References 23 publications

(26 reference statements)

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“…This finding is supported by several studies on the effect of porcelain veneering on the accuracy of fit of zirconia restorations [12][13][14]26) . An exception was found with a study by Vigolo and Fonzi 15) , who reported that veneering did not affect the fitting accuracy of zirconia restorations.…”

Section: Strain Developmentmentioning

confidence: 76%

“…Balkaya et al 14) found that only the porcelain firing cycle affected the marginal fit of all-ceramic single crowns, but not so with the glaze firing cycle. On the other hand, Vigolo and Fonzi 15) found that neither the porcelain firing cycle nor the glaze cycle affected the marginal fit of four-unit CAD/CAMfabricated zirconia restorations.…”

Section: Introductionmentioning

confidence: 99%

“…In the current study, assessment was based on strain development, and hence fitting accuracy, using strain gage measurements 11) . In the aforementioned studies 15,25) , assessment was based on marginal fit using gap measurements. As shown by Hegde et al 4) , microgap measurements had no correlation with increasing misfit and that the presence or absence of a microgap was not necessarily indicative of passivity.…”

Section: Strain Developmentmentioning

confidence: 99%

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Microfractures in metal-ceramic and all-ceramic implant-supported fixed dental prostheses caused by superstructure fixation

Karl¹,

Graef²,

Wichmann³

et al. 2012

Dent. Mater. J.

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The effect of ceramic veneering on the passivity of fit of cast metal and CAD/CAM-fabricated zirconia ceramic implant-supported three-unit cement-retained restorations was investigated, as well as the effect of misfit stress on the marginal integrity of ceramic veneers. Superstructures were fabricated using cast metal or by CAD/CAM milling of presintered or HIP zirconia ceramic (n=10). Before and after veneering, strain gages were used to measure in vitro the strain developed in all the restorations as a result of superstructure fixation. Fluorescent penetrant method was used to detect microcracks developed in ceramic veneers. Cast frameworks showed significantly higher strain values than CAD/CAM frameworks (p=0.000). Veneering significantly increased strain development in all CAD/CAM frameworks (p=0.000). Compared to zirconia ceramic restorations, significantly more microcracks were observed in cast restorations (p=0.000) both before and after superstructure fixation.

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Section: Strain Developmentmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Strain Developmentmentioning

confidence: 99%

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Microfractures in metal-ceramic and all-ceramic implant-supported fixed dental prostheses caused by superstructure fixation

Karl¹,

Graef²,

Wichmann³

et al. 2012

Dent. Mater. J.

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“…In addition, the ceramic firing cycles and glaze 16) . On the other hand, Vigolo and Fonzi found that porcelain firing cycles and glazing cycles did not affect the marginal fit of the zirconium-oxide-based ceramic with three different CAD/CAM systems 17) . Marginal fit is one of the most important criteria for the long-term success of all-ceramic crowns 18) .…”

Section: Introductionmentioning

confidence: 99%

Fit of zirconia all-ceramic crowns with different cervical margin designs, before and after porcelain firing and glazing

et al. 2014

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The purpose of this study is to investigate the fit of zirconia cores and all-ceramic crowns prepared with different cervical margin designs. The radius of curvature between the axial wall and the occlusal surface was set to 1 mm in an abutment using the cervical shoulder marginal design (S) and to 0.2 and 0.5 mm in abutments with round shoulders (0.2RS and 0.5RS, respectively). The internal gaps of the cores were 45-138 μm (S), 41-141 μm (0.2RS), and 43-133 μm (0.5RS). The internal gaps of the all-ceramic crowns were 40-115 μm (S), 45-113 μm (0.2RS), and 42-126 μm (0.5RS). There were no significant differences in one-way ANOVA for any region in any marginal design before and after firing the porcelain. The marginal gaps between the all-ceramic crowns and dies were 27±25 (S), 30±29 (0.2RS), and 24±27 μm (0.5RS), again with no significant differences in one-way ANOVA.

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“…The results indicated that heat treatment influences the surface of the ceramic material by reducing the amount of monoclinic zirconia grains, which is suggested to result in a lower strength. Vigolo and Fonzi [14] found that the veneering porcelain firing cycle or the veneer glazing cycle did not affect the marginal fit of the fixed partial dentures. Whereas Dittmer et al found in a recent study that stresses and distortions that occur due to the veneering process may influence the marginal and internal fit of zirconia dental crowns and fixed partial dentures [15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment and Feldspathic Glazing on Some Mechanical Properties of Zirconia

Hjerppe

Fröberg

Lassila

et al. 2010

Silicon

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Purpose In dental practice, zirconia substructures for crowns and fixed partial dentures are veneered with feldspathic porcelain for better aesthetical properties. The purpose of this study was to evaluate the effect of heat treatment during the veneering process on the mechanical properties of zirconia. Methods 105 zirconia (ICE Zirkon, Zirkonzahn, Italy) disc shaped specimens were divided into seven groups (n=15/ group) and sintered at 1500°C. Control specimens (group 1) were left as such. Specimens in the study groups were: 2) one heat treatment in a porcelain firing furnace; 3) a heat treatment with two firing cycles; 4) one heat treatment with a thin coating of feldspathic glazing on the tension side; 5) two heat treatments with a thin coating of feldspathic wash and glazing on the tension side; 6) one heat treatment with a thin coating of feldspathic glazing on the compression side; 7) two heat treatments with a thin coating of feldspathic wash and glazing on the compression side. Biaxial flexural strength and surface microhardness of the specimens (diameter 19 mm, thickness 1.2 mm) were measured. The effect of heat treatment and feldspathic glazing on the phase transformations of zirconia was determined by XRD-analysis. The data were calculated using ANOVA-analysis.Results Repeated heat treatment did not influence the mechanical properties of zirconia (p>0.05). No difference (p>0.05) was found in terms of the surface microhardness between the groups. Some transformation from the tetragonal to the monoclinic phase was seen on the surface of the specimens after heat treatment and feldspathic glazing coating. Conclusions Repeated heat treatment does not affect the strength of zirconia milled in the green-stage form.

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An In Vitro Evaluation of Fit of Zirconium‐Oxide‐Based Ceramic Four‐Unit Fixed Partial Dentures, Generated with Three Different CAD/CAM Systems, before and after Porcelain Firing Cycles and after Glaze Cycles

Cited by 102 publications

References 23 publications

Microfractures in metal-ceramic and all-ceramic implant-supported fixed dental prostheses caused by superstructure fixation

Microfractures in metal-ceramic and all-ceramic implant-supported fixed dental prostheses caused by superstructure fixation

Fit of zirconia all-ceramic crowns with different cervical margin designs, before and after porcelain firing and glazing

The Effect of Heat Treatment and Feldspathic Glazing on Some Mechanical Properties of Zirconia

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