ArticleBMC oral health2025
Effect of glazing and hydrothermal aging on the fracture strength of metal-ceramic single restorations after additional firing: an in vitro study.
Article in BMC oral health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Stress evaluation of different cad-on material combinations in crown design over conventional hand-layered zirconia - an in vitro 3d finite element analysis.Revista cientifica odontologica (Universidad Cientifica del Sur)Article
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Authors and funding
4 authors.
Funding
Abstract
backgroundAdditional firing to repair a lost proximal contact or porcelain chipping might affect the fracture strength of a metal-ceramic crown. This study aimed to evaluate the effect of glazing and hydrothermal aging on the fracture strength of metal-ceramic crowns after additional firing.
methodsA total of 40 metal-ceramic crowns were fabricated and divided evenly into five groups: not aged/glazed (G0), 3-month-old/glazed (G3), 24-month-old/glazed (G24), 3-month-old/unglazed (nG3), and 24-month-old/unglazed (nG24). Autoclaving was used as the aging protocol. All groups underwent an additional firing cycle, and fracture strength was measured. Data were analyzed using ANOVA and independent t-tests.
resultsG0 demonstrated the highest fracture strength (4405.00 ± 1528.20 N), followed by G3, nG3, G24, and nG24, respectively. There was a significant difference between G0 and G24 (P =.01), G0 and nG3 (P =.00), and G0 and nG24 (P =.00).
conclusionGlazing does not significantly affect the fracture strength of a metal-ceramic crown undergoing additional firing; however, aging has a significant adverse effect on fracture strength. This negative effect is not significant until after 3 months.
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