Effect of metal selection and porcelain firing on the marginal accuracy of titanium-based metal ceramic restorations

Shokry, Tamer E.; Attia, Mazen A.; Mosleh, I; El-Hosary, Mohamed M.; Hamza, Tamer; Shen, Chiayi

doi:10.1016/s0022-3913(09)60216-x

Cited by 45 publications

(32 citation statements)

References 20 publications

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“…Hung et al15 reported that thermocycling increases the marginal opening. Furthermore, Shokry et al27 reported that the marginal discrepancy increases during the process of producing the core with the Ni-Cr alloy and titanium alloy and finishing the metal-ceramic crown, with the highest increase during the opaque treatment; the marginal discrepancy was largest with the Ni-Cr alloy. Extreme precision is required when investigating whether the marginal and internal gaps are affected by firing during the production of metal-ceramic crowns from the core.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques

Kim

et al. 2013

J Adv Prosthodont

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PURPOSEOne of the most important factors in evaluating the quality of fixed dental prostheses (FDPs) is their gap. The purpose of this study was to compare the marginal and internal gap of two different metal-ceramic crowns, casting and selective laser sintering (SLS), before and after porcelain firing. Furthermore, this study evaluated whether metal-ceramic crowns made using the SLS have the same clinical acceptability as crowns made by the traditional casting.MATERIALS AND METHODSThe 10 study models were produced using stone. The 20 specimens were produced using the casting and the SLS methods; 10 samples were made in each group. After the core gap measurements, 10 metal-ceramic crowns in each group were finished using the conventional technique of firing porcelain. The gap of the metal-ceramic crowns was measured. The marginal and internal gaps were measured by two-dimensional and three-dimensional replica techniques, respectively. The Wilcoxon signed-rank test, the Wilcoxon rank-sum test and nonparametric ANCOVA were used for statistical analysis (α=.05).RESULTSIn both groups, the gap increased after completion of the metal-ceramic crown compared to the core. In all measured areas, the gap of the metal cores and metal-ceramic crowns produced by the SLS was greater than that of the metal cores and metal-ceramic crowns produced using the casting. Statistically significant differences were found between cast and SLS (metal cores and metal-ceramic crown).CONCLUSIONAlthough the gap of the FDPs produced by the SLS was greater than that of the FDPs produced by the conventional casting in all measured areas, none exceeded the clinically acceptable range.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques

Kim

et al. 2013

J Adv Prosthodont

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“…The porcelain firing cycles need a variety of high-temperature treatments that may lead to the distortion of the copings, resulting in a marginal discrepancy. 12 Although, many deficiencies are found with the lost-wax casting technique, such as structural flaws like surface roughness and internal porosity, 13 this traditional casting technique is still popular for fabricating complete coverage crowns and partial fixed dental prostheses. 4,14 Consequently cast copings were chosen as a control group.…”

mentioning

confidence: 99%

Effects of repeated firing on the marginal accuracy of Co-Cr copings fabricated by selective laser melting

Zeng

Zhang²,

Liu³

et al. 2015

The Journal of Prosthetic Dentistry

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“…These difficulties in casting have been circumvented by the development of CAD/CAM milling technologies. It was recently shown that these systems can produce copings that, after the addition and firing of porcelain, exhibit less marginal discrepancy than Ni–Cr cast alloy systems …”

mentioning

confidence: 99%

Effect of Bonding Agent Application Method on Titanium‐Ceramic Bond Strength

Curtis

Dossett

Prihoda

et al. 2014

Journal of Prosthodontics

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Effect of metal selection and porcelain firing on the marginal accuracy of titanium-based metal ceramic restorations

Cited by 45 publications

References 20 publications

Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques

Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques

Effects of repeated firing on the marginal accuracy of Co-Cr copings fabricated by selective laser melting

Effect of Bonding Agent Application Method on Titanium‐Ceramic Bond Strength

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