Castability of a commercial castable glass ceramics.
This study was carried out to determine the design and thickness of the cervical margin of a castable ceramic restoration from the point of view of its castability. Castability of castable ceramics was lower compared to Ag-Pd-Au and Co-Cr alloy with the use of the mesh pattern and rod pattern test (p < 0.05). It was more dependent on the pattern thickness than alloys (p < 0.05), and perfect reproducibility with non-measurable variability could be estimated to reach 1.0 mm thickness of the original pattern (p < 0.001). Marginal shape was certainly more reproducible in a right angle shoulder than in 30, or 45 degree bevels (p < 0.05). From these results, it is suggested that a right angle shoulder margin with 1.0 mm thickness is more suitable to castable glass ceramic restoration than any other design.
Ukon
S
S
Department of Fixed Prosthodontics, Fukuoka Dental College, Japan.
Fujita
M
M
Hayakawa
M
M
Takami
A
A
Ikeura
M
M
Fukaura
Y
Y
Ogata
T
T
D000704:Analysis of Variance; D002516:Ceramics / Q000737:chemistry*; D002858:Chromium Alloys / Q000737:chemistry; D003735:Dental Casting Technique; D006047:Gold Alloys / Q000737:chemistry; D012044:Regression Analysis; D015203:Reproducibility of Results
D002858:Chromium Alloys; D006047:Gold Alloys; C023506:Glass ceramics