提高铸造陶瓷全冠粘接强度的研究

Improving the Bonding Strength of Castable Ceramic Crowns

为考察不同粘接剂对Ｐｌａｔ－Ⅱ型铸造陶瓷全冠粘接于牙体后的整体强度的影响，选用Ｐａｎａｖｉａ２１树脂粘接剂和Ｐｏｒｃｅｌｉｔｅｄｕａｌｃｕｒｅｃｅｍｅｎｔ树脂粘接剂，分别检测粘接后试件的破坏载荷。结果表明：Ｐａｎａｖｉａ２１粘接的破坏载荷（８４５．８±１３７．１Ｎ）高于Ｐｏｒｃｅｌｉｔｅ粘接的破坏载荷（５３４．０±５８．７Ｎ），两者间有显著性差异（Ｐ＜０．０５），且超过咀嚼过程中产生的正常牙合力值。提示临床可用Ｐａｎａｖｉａ２１粘接Ｐｌａｔ－Ⅱ型铸造陶瓷全冠。

To study the influence of bonding agent on fracture strength of PlatⅡ castable ceramic crowns bonded to molars, we tested the specimens in vitro with Panavia 21 resin bonding agent and porcelite dual cure cement. The results showed that the fracture loading (845.8±137.1 N) of crowns bonded with Panavia 21 bonding agent was higher than that (534.0±58.7 N) of crows bonded with porcelite dual cure cement. The difference between the two agents was statistically significant (P<005). The crowns bonded with Panavia 21 agent had higher strength than bite forces. These suggest that costable ceramic crowns could be bonded with Panavia 21 resin agent in clinical practice.