Fracture strength of non-colored and colored high translucent Y-TZP three-unit fixed partial denture cores designed according to the state-of-the-art core design

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Fracture strength of non-colored and colored high translucent Y-TZP three-unit fixed partial denture cores designed according to the state-of-the-art core design

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Publication 2-year master student thesis
Title Fracture strength of non-colored and colored high translucent Y-TZP three-unit fixed partial denture cores designed according to the state-of-the-art core design
Author Khan, Abdul-Salam ; Shahbaz, Armin
Date 2017
English abstract
Aim: The aim of the study was to evaluate the fracture strength and fracture mode of non-colored compared to colored, anterior three-unit FDP cores made from high translucent zirconia with the state-of-the-art core design. Material and methods: A total of 40 anterior three-unit high translucent zirconia FDP cores were manufactured according to the state-of-the-art core design. The FDPs were divided into two groups (Wieland Zenostar MT0 and DD cubeX2). Each group of manufacturer contained two subgroups, one colored and one non-colored. All FDPs underwent heat treatment and artificial aging in the form of thermocycling and preloading whereafter the specimens were subjected to load until fracture. Results: In one of the groups (Wieland Zenostar MT0) the non-colored zirconia had significantly (p=0,000001) higher fracture strength compared to its colored counterpart. No significant difference was found in the other group (DD cubeX2 non-colored, DD cubeX2 colored). Conclusion: Within the limitations of this study, the following conclusion was drawn - Coloring of high-translucent Y-TZP with infiltration technique before sintering could decrease the fracture strength of FDPs. - A decrease in fracture strength after coloring was found in one group (Wieland Zenostar MT0), whereas the other showed no difference (DD cubeX2). - No clear conclusions regarding fracture mode could be made.
Swedish abstract
Syfte: Syftet med föreliggande studie var att utvärdera brotthållfastheten och brottstypen av icke-infärgade och infärgade anteriora tre-leds broskelett tillverkade av högtranslucent zirconia med state-of-the-art core design. Material och metod: Totalt 40 anteriora tre-leds broskelett i högtranslucent zirconia tillverkades. Zirconia broskeletten delades in i två grupper (Wieland Zenostar MT0) 20 st 3-ledsbroskelett och (DD cubeX2) 20 st 3-ledsbroskelett. Vardera grupp innehöll två subgrupper med 10 st infärgade och 10 st icke-infärgade broskelett. Alla broskelett genomgick värmebehandling och artificiell åldring i form av termocykling och förbelastning varefter proverna utsattes för last till brott. Resultat: Signifikant skillnad i brotthållfasthet (p=0,000001) i gruppen (Wieland Zenostar MT0) icke-infärgat och infärgat. Ingen signifikant skillnad uppmättes i gruppen (DD cubeX2) icke-färgat och infärgat. Slutsats: Med de begränsningar som denna studie medför, kan följande slutsatser dras - Infärgning av högtranslucent Y-TZP med infiltrationsteknik före sintring kan potentiellt minska brotthållfasthet av protetiska konstruktioner. - En minskad brotthållfasthet efter infärgning uppmättes i en av grupperna (Wieland Zenostar MT0), ingen skillnad efter infärgning påvisades i den andra gruppen (DD cubeX2). - Inga tydliga konklusioner gällande brottstyp kunde fastställas.
Publisher Malmö högskola/Odontologiska fakulteten
Pages 28
Language eng (iso)
Subject Zirconia
Y-TZP
High translucent
Colored
Non-colored
Fracture strength
Fracture mode
Three-unit
FDP
State-of-the-art
Handle http://hdl.handle.net/2043/22654 Permalink to this page
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