Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115, USA.
Dent Mater. 2011 Oct;27(10):1011-6. doi: 10.1016/j.dental.2011.06.008. Epub 2011 Jul 29.
Test the hypothesis that glass-bonding of free-form veneer and core ceramic layers can produce robust interfaces, chemically durable and esthetic in appearance and, above all, resistant to delamination.
Layers of independently produced porcelains (NobelRondo™ Press porcelain, Nobel BioCare AB and Sagkura Interaction porcelain, Elephant Dental) and matching alumina or zirconia core ceramics (Procera alumina, Nobel BioCare AB, BioZyram yttria stabilized tetragonal zirconia polycrystal, Cyrtina Dental) were joined with designed glasses, tailored to match thermal expansion coefficients of the components and free of toxic elements. Scanning electron microprobe analysis was used to characterize the chemistry of the joined interfaces, specifically to confirm interdiffusion of ions. Vickers indentations were used to drive controlled corner cracks into the glass interlayers to evaluate the toughness of the interfaces.
The glass-bonded interfaces were found to have robust integrity relative to interfaces fused without glass, or those fused with a resin-based adhesive.
The structural integrity of the interfaces between porcelain veneers and alumina or zirconia cores is a critical factor in the longevity of all-ceramic dental crowns and fixed dental prostheses.
验证玻璃结合的自由形态贴面和核陶瓷层可以产生坚固的界面，具有化学耐久性和美观的外观，最重要的是，能够抵抗分层。
独立生产的陶瓷层（NobelRondo™ Press 瓷、Nobel BioCare AB 和 Sagkura Interaction 瓷、Elephant Dental）和匹配的氧化铝或氧化锆核陶瓷（Procera 氧化铝、Nobel BioCare AB、BioZyram 氧化钇稳定四方氧化锆多晶、Cyrtina Dental）与设计的玻璃结合，以匹配组件的热膨胀系数，并避免有毒元素。扫描电子探针分析用于描述连接界面的化学特性，特别是确认离子的互扩散。维氏压痕用于将受控的角裂纹驱动到玻璃层间，以评估界面的韧性。
与没有玻璃结合的界面或用基于树脂的粘合剂结合的界面相比，玻璃结合的界面被发现具有坚固的完整性。
瓷贴面和氧化铝或氧化锆核之间的界面的结构完整性是所有陶瓷牙冠和固定修复体寿命的关键因素。
