Sprayed opaque porcelain as a retentive surface for resin-bonded restorations.
This study investigated the shear bond strength between etched enamel and 4-mm-diameter base metal castings cemented with Panavia EX. Four different methods of casting preparation were used: air abraded, salt crystals placed on the wax patterns, opaque porcelain sprayed on the metal surface, and sprayed opaque porcelain followed by a silane coupling agent. The prepared surfaces were examined before and after testing using SEM and electron dispersive analysis by x-rays. It was determined that there was no significant difference in the shear bond strength between the salt-crystal technique and the nonsilanated sprayed ceramic surfaces. The air-abraded surface was the least retentive, and the silanated opaque porcelain specimens had intermediate retention. The sprayed opaque porcelain technique seems to offer several advantages.
Turner
C H
CH
Department of Engineering Materials, University of Southampton, England.
Sinclair
L
L
D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D003793:Dental Restoration, Permanent; D008422:Materials Testing; D008854:Microscopy, Electron; D010710:Phosphates; D019279:Resin Cements; D013499:Surface Properties; D013718:Tensile Strength
D003722:Dental Alloys; D010710:Phosphates; D019279:Resin Cements; D003776:Dental Porcelain; C052304:Panavia EX