【小星星(需筆記可加好友私訊】評論

氧化鋯(zirconia)可強化陶瓷材料  →強度高，易造成對咬牙咬耗但鋯土折射指數較玻璃為高 →易造成陶瓷濁白opaque (Leucite 較透明) →不美觀

【小甜瓜瓜】評論

氧化鋯沒有玻璃相且呈現不透光，不能作為合金和前牙的瓷貼面。A.強度不足➙氧化鋯強度高。B.不夠美觀（✔️）➙氧化鋯呈白色、較不透光，不美觀。C.對牙齒黏著性不佳（✔️）A ceramic esthetic veneer (laminate veneer) is a layer of ceramic bonded to the facial surface of a prepared tooth to cover an unsightly area. Ceramic veneers are custom made and are fabricated in a dental laboratory. Initially, ceramic veneers were made of feldspathic porcelain and sintered. Currently, most ceramic veneers are fabricated by heat-pressing or machining, using either a leucite- reinforced or lithium disilicate ceramic. To obtain sufficient adhesion, the tooth enamel is etched with phosphoric acid and the bonding surface of the ceramic is etched with 5% to 9% hydrofluoric acid gel and treated with a silane coupling agent. Resin composites specifically formulated for bonding to ceramic are used as the adhesive. (Craig’s P.256)➙黏著性為前牙瓷貼面的重要考量，長石陶瓷為適合材料。D.造成對咬牙磨耗（✔️）➙氧化鋯強度高，對咬時易造成對咬牙磨耗。可與47題比較、連結：二氧化矽(長石陶瓷的成分)和氧化鋯的比較：二氧化矽比較沒有顏色、較透光；氧化鋯則呈白色、較不透光。氧化鋯強度比二氧化矽（長石的成份之一）高，可加入陶瓷中強化材料。