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Abstract
Although all-ceramic crowns have been recognized as very good esthetic restorations, they need a great deal of tooth substance elimination and a sufficient crown thickness because they are brittle. Many strong and tough ceramics have been developed to overcome this weak point such as a core-strengthened ceramics and a castable glass ceramics. The progress of adhesive dentistry has subsequently contributed so that all-ceramic crowns have been widely used in daily practice. Strong bondings between all-ceramic crowns and abutment teeth as a dentinoenamel junction of the natural tooth have reinforced the brittleness of all-ceramic crowns. Many adhesive resins have been developed to bond restorations to tooth substances (enamel, dentin and cementum), dental alloys, ceramics and composite resins. These bonding systems, however, are very technique-sensitive and can not demonstrate the ability if not applied properly. The most effective surface treatment of abutments for ceramic bonding are presented in this paper.
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