The effect of surface coating on the bond strength of machinable ceramics.
This study examined the nature of the surface presented by a machinable feldspathic porcelain and by a machinable glass-ceramic for bonding to conventional composite luting agents and measured the bond strengths which may be achieved with various surface treatments. There was no significant difference between the bond strengths achieved to etched porcelain, Silicoated porcelain or etched glass-ceramic. Silicoated glass-ceramic specimens showed a significantly higher adhesive assembly strength (p = 0.02). Examination of the fractured specimens showed that in all cases the failure involved part cohesive failure of the ceramic surface and part failure at the cement-ceramic interface.
Department of Clinical Dental Sciences and Clinical Engineering, The University of Liverpool, UK.
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Jedynakiewicz
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Martin
D000134:Acid Etching, Dental; D002516:Ceramics / Q000737:chemistry*; D017076:Computer-Aided Design; D003776:Dental Porcelain / Q000737:chemistry; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013314:Stress, Mechanical; D013499:Surface Properties
D003776:Dental Porcelain; C023506:Glass ceramics