The study on fabrication of dental restoration using PMMA-ZrO2 composites via CAD/CAM / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 23-26, 2005.
Article
Dans Chinois
| WPRIM
| ID: wpr-324116
ABSTRACT
<p><b>OBJECTIVE</b>To obtain dental restorations by machining PMMA-ZrO2 organic-inorganic composites with the dental CAD/CAM system.</p><p><b>METHODS</b>Partially sintered Zirconia compacts (PSZC) were prepared via isostatic pressing and partially sintering, with Zirconia nanopowder as raw materials. PMMA-Zirconia organic-inorganic composites were prepared by vacuum infiltrating the prepolymerized MMA into the PSZC, followed by in-situ polymerization. The mechanical properties and machinability of composites were studied. The composites were machined on the dental CAD/CAM system to obtain dental restoration.</p><p><b>RESULTS</b>At 71.44% TD of PSZC, the composite had a 3-point bending strength of (202.56 +/- 3.09) MPa, fracture toughness of (4.30 +/- 0.16) MPa.m(1/2), elasticity modulus of (58.71 +/- 1.98) GPa, and Vickers hardness of (3.82 +/- 0.34) GPa, respectively. A premolar crown was fabricated by CAD/CAM system in 16 mins, and was verisimilitude, without any cracks.</p><p><b>CONCLUSIONS</b>The composite at 71.44% TD of PSZC has good mechanical properties and dental restorations can be manufactured by PMMA-Zirconia composites via dental CAD/CAM system.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Zirconium
/
Test de matériaux
/
Prothèses dentaires
/
Conception assistée par ordinateur
/
Poly(méthacrylate de méthyle)
/
Matériaux dentaires
/
Utilisations thérapeutiques
langue:
Chinois
Texte intégral:
Chinese Journal of Stomatology
Année:
2005
Type:
Article
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