Mechanical characterisation of CAD/CAM dental material and natural teeth

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43930608" target="_blank" >RIV/60461373:22310/24:43930608 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1999" target="_blank" >https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1999</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13168/cs.2024.0050" target="_blank" >10.13168/cs.2024.0050</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical characterisation of CAD/CAM dental material and natural teeth

Popis výsledku v původním jazyce

The aim of this study was to investigate the hardness and the fracture toughness of dental ceramic materials by means of the Vickers indentation technique. One type of most common commercial restorative dental ceramic materials fabricated using CAD/CAM system leucite-based glass-ceramics was selected for study and comparison with laboratory synthetized leucite composites and natural teeth. Obtained results showed that the measurement of hardness and fracture toughness depends on the used conditions (the indenter geometry, the indentation load and the duration of maximal force), morphology of polished surface, type of crack system developed or measured indentations and of course on the empirical equation (Casellas, Shetty et al., Niihara et al., Lankford, Niihara, Laugier, Nakahira) used for calculation of fracture toughness. The results proved that the values of Vickers hardness of our laboratory prepared leucite composites (7.76 - 8.92 GPa) are very close to the values of commercial IPS Empress blocks. The Vickers indentation test was verified as a suitable method for evaluation of fracture toughness of small sized samples of leucite-based dental composites when using low indentation load of 9.807, 19.61, 29.42 and 39.23 N and indication of Palmqvist cracks.

Název v anglickém jazyce

Mechanical characterisation of CAD/CAM dental material and natural teeth

Popis výsledku anglicky

The aim of this study was to investigate the hardness and the fracture toughness of dental ceramic materials by means of the Vickers indentation technique. One type of most common commercial restorative dental ceramic materials fabricated using CAD/CAM system leucite-based glass-ceramics was selected for study and comparison with laboratory synthetized leucite composites and natural teeth. Obtained results showed that the measurement of hardness and fracture toughness depends on the used conditions (the indenter geometry, the indentation load and the duration of maximal force), morphology of polished surface, type of crack system developed or measured indentations and of course on the empirical equation (Casellas, Shetty et al., Niihara et al., Lankford, Niihara, Laugier, Nakahira) used for calculation of fracture toughness. The results proved that the values of Vickers hardness of our laboratory prepared leucite composites (7.76 - 8.92 GPa) are very close to the values of commercial IPS Empress blocks. The Vickers indentation test was verified as a suitable method for evaluation of fracture toughness of small sized samples of leucite-based dental composites when using low indentation load of 9.807, 19.61, 29.42 and 39.23 N and indication of Palmqvist cracks.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

CERAMICS-SILIKATY

ISSN

0862-5468

e-ISSN

1804-5847

Svazek periodika

68

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

11

Strana od-do

516-526

Kód UT WoS článku

001296789200003

EID výsledku v databázi Scopus

—