Thermocycling did not decrease the bond strength results for both In- Ceram Alumina (30.6Â☘.2 MPa P=0.2053) and In- Ceram zirconia (32.6Â☙ MPa P=0.3987) core ceramic-feldspathic veneering ceramic combinations when compared to non-aged conditions (28.1Â☖.4 MPa, 29.7Â☗.3 MPa, respectively). The bond strength data (MPa) were analyzed using ANOVA (α=0.05). Failure modes were analyzed using optical microscope (x20). Shear bond strength test was performed in a universal testing machine (cross-head speed: 1 mm/min). The core-veneering ceramic assemblies were randomly divided into two conditions and tested either immediately after specimen preparation (Dry) or following 30000 thermocycling (5-55 Â✬Â☑ dwell time: 30 seconds). Veneering ceramic (VITA VM7) was fired onto the core ceramics using a mold. Disc shaped (thickness: 4 mm, diameter: 4 mm) of glass-infiltrated alumina (In- Ceram Alumina) and glass-infiltrated alumina reinforced by zirconia (In- Ceram Zirconia) core ceramic specimens (N=48, N=12 per groups) were constructed according to the manufacturers' recommendations.
This study compared the bond strength durability of a feldspathic veneering ceramic to glass-infiltrated reinforced ceramics in dry and aged conditions. Mesquita, A M M Ozcan, M Souza, R O A Kojima, A N Nishioka, R S Kimpara, E T Bottino, M A The electrochemical stability of the microporous HDPE film containing alpha alumia was increased with an increased irradiation dose up ti 50 kGyĭurability of feldspathic veneering ceramic on glass-infiltrated alumina ceramics after long-term thermocycling. The mechanical characteristics of the microporous HDPE films were increased with a content of alpha alumina up to 15%, but decreased at 20%. The pore volume of the microporous HDPE films was increased with an increasing content of the alpha alumina. C and then the stretched HDPE films were irradiated by gamma rays. The precursor films were uni-axially stretched up to 600% in oven 120. The HDPE and the alpha alumina were mixed to obtain the precursor film in the twin extruder. The particle size and the specific surface area of alpha alumina were 400 nm and 7.3 m 2 g -1. The effects of the addition of the alpha alumina on the properties of the microporous high density polyethylene (HDPE) films were investigated. Park, Jong Seok Sung, Hae Jun Gwon, Hui Jeong Lim, Youn Mook Nho, Young Chang International Nuclear Information System (INIS) Characterization of the microporous HDPE film with alpha alumina
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