The clinical cementation of all-ceramic dental: Many studies have shown that cements a full porcelain crown not cements the crown cracking strength improved significantly. Ludwig and Joseph report, the cementation process, the cracking strength increased by 200%.
1. Surface treatment:
(1). Crown deal with, Dalloca pointed out that 50% of HF treatment Empress Crown surface 30 ~ 60s, and spraying the silane coupling agent, can get the smallest edge of the micro-leakage, and increase the bonding strength. Kern supports that notion, noting that: Empress Crown can not be blast to the adhesive surface, blasting may wear too much ceramic layer, causing morphological changes. For adhesion of the embedded particles, can be used to dental instruments spray a specially made small glass beads to remove.
(2). Support organizations: support organization for the dentin, can be taken to the conventional treatment, metal post and core as a support organization, you can barbecue on the metal surface layer of opaque layer, and then conventional treatment.
2. Cements: Burke, the experiments show that, the use of dentin bonding agents can increase the flexural strength of Empress ceramic crowns, bonding effect than Front teeth missing hazards zinc phosphate, glass ionomer is good, and suggested that the double light curing type Super micro filler composite resin.
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