烤瓷冠兼其金属的强度和瓷美观的优点,只要烤瓷冠与金属结合良好,这就从根本上克服了陶瓷强度不够的致命缺点。烤瓷冠边缘的颜色与形态,对美观及牙龈健康有很大的影响,特别是唇侧烤瓷冠的颜色与形态对美观影响更大。传统金瓷冠的金属颈圈一定程度上影响了唇面的美观,唇面颈缘瓷体厚度不足导致暗青色,非贵金属的颈缘可因氧化等原因出现灰线等,这些因素均促使了金瓷冠唇面全瓷边缘的应用和全瓷冠的发展。 金属烤瓷冠的边缘有三种类别: 金属边缘,颈缘颜色不好,但边缘密合,适用后牙。 不露金属边缘,这种方法常用,但实际上边缘还是有金属。为美观需要常把边缘做到龈下,但牙龈易发黑, 瓷边缘:美观、颈部色自然,不变色,但临床牙体制备要求高,难度大,技工室制作复杂。 根据日本调查资料,开口笑时,上口唇与上前齿 Porcelain crown and its metal strength and beautiful porcelain advantages, as long as the porcelain crown and metal with a good combination, which fundamentally overcome the fatal shortcomings of insufficient ceramic strength. The color and shape of the edge of porcelain crowns have a great impact on the appearance and health of the gums. In particular, the color and appearance of the porcelain fused to the porcelain crown have a greater impact on the appearance. The traditional metal porcelain crown metal collar to some extent affected the appearance of the lip, lip neck edge porcelain body thickness caused by lack of dark blue, non-precious metal neck due to oxidation and other reasons gray line, etc., these factors are prompted The application of porcelain enamel crepe all-ceramic edge and all-ceramic crown development. There are three kinds of metal porcelain crown edge: metal edge, neck edge color is not good, but the edge of close fit for posterior teeth. This method is not commonly used, but in fact the edge is still metal. For the aesthetic need to often do the edge of the subgingival, but the gums are easy to black, porcelain edge: beautiful, natural neck color, does not change color, but the preparation of clinical teeth demanding, difficult, complex production room. According to the Japanese survey data, when the opening laugh, the upper lip and the upper teeth