TY - JOUR
T1 - Shear bond strength of several new core materials
AU - Levartovsky, Shifra
AU - Goldstein, Gary R.
AU - Georgescu, Maria
N1 - Funding Information:
Supported by the Greater New York Academy Research Foundation. Presented at the International Seattle, Wash., March 1994. aImplant Fellow. bProfessor and Director of Prosthodontic Restorative and Prosthodontic Sciences. “Assistant Professor, Dental Materials Science. Copyright 0 1996 by The Editorial Council of
PY - 1996
Y1 - 1996
N2 - This study compared the shear bond strengths of three core materials: a light activated glass-ionomer cement (VariGlass VLC), a fluoride-release dual cure composite resin (FluoroCore), and a conventional silver-reinforced glass-ionomer cement (Miracle Mix) when cured to dentin. Fifty-four noncarious molar teeth were extracted, cleaned, mounted in acrylic resin, and sectioned horizontally to expose the dentin surface. Each material was mixed according to manufacturer's instructions, applied in a premade mold to the exposed dentin, and then cured. The specimens were randomized into three groups (six teeth from each material) and stored (37° C, 100% humidity) for 15 minutes, 24 hours, and 24 hours and were then thermocycled (5° to 55° C) for 125 cycles. The specimens were tested for shear bond strength with the Instron universal testing machine. The differences among time groups were not statistically significant except for Miracle Mix and VariGlass VLC cements, which showed a greater improvement with thermocycling. This study indicated that the FluoroCore resin exhibited the greatest shear bond strength of the core materials and that VariGlass VLC cement had greater bond strength than Miracle Mix cement except after thermocycling, when VariGlass VLC cement and FluoroCore resin were not significantly different.
AB - This study compared the shear bond strengths of three core materials: a light activated glass-ionomer cement (VariGlass VLC), a fluoride-release dual cure composite resin (FluoroCore), and a conventional silver-reinforced glass-ionomer cement (Miracle Mix) when cured to dentin. Fifty-four noncarious molar teeth were extracted, cleaned, mounted in acrylic resin, and sectioned horizontally to expose the dentin surface. Each material was mixed according to manufacturer's instructions, applied in a premade mold to the exposed dentin, and then cured. The specimens were randomized into three groups (six teeth from each material) and stored (37° C, 100% humidity) for 15 minutes, 24 hours, and 24 hours and were then thermocycled (5° to 55° C) for 125 cycles. The specimens were tested for shear bond strength with the Instron universal testing machine. The differences among time groups were not statistically significant except for Miracle Mix and VariGlass VLC cements, which showed a greater improvement with thermocycling. This study indicated that the FluoroCore resin exhibited the greatest shear bond strength of the core materials and that VariGlass VLC cement had greater bond strength than Miracle Mix cement except after thermocycling, when VariGlass VLC cement and FluoroCore resin were not significantly different.
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U2 - 10.1016/S0022-3913(96)90092-X
DO - 10.1016/S0022-3913(96)90092-X
M3 - Article
C2 - 8667273
AN - SCOPUS:0030077037
SN - 0022-3913
VL - 75
SP - 154
EP - 158
JO - Journal of Prosthetic Dentistry
JF - Journal of Prosthetic Dentistry
IS - 2
ER -