Design of gold supporting structures for fused porcelain restorations

Straussberg, George; Katz, Gerry; Kuwata, Masahiro

doi:10.1016/0022-3913(66)90015-1

Cited by 29 publications

(17 citation statements)

References 2 publications

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“…Metal-ceramic gold alloys are used to fabricate substructures of porcelain, and thus, the metal substructures are made thin enough to increase the aesthetic potential of semitranslucent porcelain superstructure [1,2]. Metal-ceramic gold alloys have insufficient creep resistance and poor hardness after casting due to the high gold content.…”

Section: Introductionmentioning

confidence: 99%

Hardening effect of pre- and post-firing heat treatment for a firing-simulated Au-Pd-In metal-ceramic alloy

Jeon

Kim

et al. 2014

Gold Bull

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The hardening effect of the pre-and post-firing heat treatments and their dual treatment was examined for a firingsimulated Au-Pd-In metal-ceramic alloy to determine if an additional post-firing heat treatment is effective in the hardening of an Au-Pd-In metal-ceramic alloy as well as to compare the hardening effects of pre-and post-firing heat treatments for a firing-simulated Au-Pd-In metal-ceramic alloy. The postfiring heat treatment was much more effective than the prefiring heat treatment or dual treatments. The hardening effect of the pre-and post-firing heat treatments was caused by the induction of fine grain interior precipitation. In the pre-firing heat-treated specimen after casting, the apparent hardening was achieved during simulated porcelain firing, but an additional post-firing heat treatment did not introduce severe grain interior precipitation, resulting in very weak hardening. In the as-cast specimen without the pre-firing heat treatment, apparent hardening by grain interior precipitation was achieved only by post-firing heat treatment and not by simulated porcelain firing.

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Section: Introductionmentioning

confidence: 99%

Hardening effect of pre- and post-firing heat treatment for a firing-simulated Au-Pd-In metal-ceramic alloy

Jeon

Kim

et al. 2014

Gold Bull

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“…These factors may be related to the technician, dentist, environment, design of the restoration, or to inherent structure of ce- ramics and others. Straussberg et al [71] said: "to obtain the optimum results inherent in porcelain-fused-to-gold restorations, the dentist must understand and respect the physical characteristics of the materials and guide the design and fabrication of the restoration so as to exploit their strengths and compensate for their weaknesses. "…”

Section: Resultsmentioning

confidence: 99%

Porcelain fracture of metal-ceramic tooth-supported and implant-supported restorations: A review

Shadid¹,

Sadaqah²,

Abu-Naba’a³

et al. 2013

OJST

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Metal-ceramic restorations are widely used in dentistry with a high degree of general success. However, fracture of these restorations does occur and usually frustrates both the dentist and the patient. Objective: This literature review discusses the factors that may lead to the fracture of these restorations whether they are tooth-supported or implant-supported with the aim of making dentists and technicians aware of these factors to avoid them. Factors reviewed include: technical factors, dentist-related factors, inherent material properties, direction, magnitude and frequency of applied loads, environmental factors, screw-retained implant-supported restorations, and posterior cantilevered prostheses. Material and Methods: A netbased search in "Pubmed" was performed and combined with a manual search. The search was limited to articles written in English. Conclusions: the published literature revealed that the factors predisposing to fracture of metal-ceramic restorations may be related to the technician, dentist, patient, environment, design of the restoration, or to inherent structure of ceramics and others. However, if the dentist and technician understand these factors and respect the physical characteristics of the materials, most of those are avoidable.

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“…The risk of failure of the porcelain part is generally considered to be limiting factor and if a fracture occurs in a ceramic structure it is difficult to repair. Several authors have discussed the design of metal-ceramic crowns (Straussberg, Katz & Kuwata, 1966;Craig, El-Ebrashi & Peyton, 1971;Hobo & Shillingburg, 1973;Earah & Craig, 1975). The dimensions of the metal component are important and the minimum thickness is considered to be 0-3-0-5 mm.…”

Section: Introductionmentioning

confidence: 99%