AUTHOR(S): Marwa Abu El Eneen, Dr. Gihan El-Naggar and Dr. Maha Taymour

ABSTRACT:The aim of the present study is to evaluate the marginal accuracy of zirconia reinforced lithium silicate (VITA SUPRINITY) single crowns with two margin designs. Conservative dentistry is a treatment procedure by which a minimum of healthy tooth structure is removed during the restoration process; it is inherently a desirable dental goal. Feather edge (knife edge) or shoulderless margin design is considered a conservative tooth preparation. With the production of recent adhesive technologies and high strength ceramic materials that can be constructed in the form of monolithic restoration, tooth structure can be preserved by prepless preparation design. Newly introduced material in dental field should pass through several in-vitro tests before any clinical application.

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