Esthetic modification of cast dental-ceramic restorations.
The advantages and disadvantages of conventional opaque substructures (eg, metal ceramic restorations) used for creating esthetic complete crown restorations are reviewed, and the esthetic advantages of veneering a translucent crown (Dicor) are considered. An appropriate aluminous veneering porcelain was identified (Vitadur Veneer). This veneer porcelain was chosen to match the thermal coefficient of expansion of the cast glass-ceramic substructure. A flexural strength study was then completed and it showed no difference in the strength of the veneered and nonveneered translucent cast glass-ceramic specimens. Scanning electron microscopy revealed that the interface between the porcelain veneer and cast glass-ceramic substructure had no visible porosity and resulted in a continuous-appearing structure. Potential coping designs, as well as the clinical applications and ramifications of this modified crown, are discussed.
Campbell
S D
SD
Harvard School of Dental Medicine, Boston 02115.
D000537:Aluminum Oxide; D000704:Analysis of Variance; D002516:Ceramics; D003116:Color; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003801:Dental Veneers; D004955:Esthetics, Dental; D016062:Porosity; D013718:Tensile Strength
C047475:Dicor ceramic; D003776:Dental Porcelain; C058236:Vitadur N; D000537:Aluminum Oxide