在降解性牙科陶瓷腔计划的影响

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多个陶瓷系统介绍了过去四年材料特性相当大的进步。全冠的存活率不同类型的陶瓷,制备方法和临床适应症。氧化锆和硅酸锂是最常用的现代牙科陶瓷材料。这些类型的生存数据修复似乎前途;然而,缺乏高质量的长期临床数据对这些修复的成功。没有健壮的纵向临床研究,实验室研究提供了一些有用的信息在陶瓷修复的性能。还需要进一步的高质量的长期临床研究来告知这些修复的故障模式和临床的范围情况下可以使用每种类型的陶瓷修复。牙科陶瓷的退化通常发生由于机械力或化学攻击。可能生理副作用陶瓷是他们倾向于擦伤反对牙齿结构,从放射性辐射的发射组件,表面粗化的化学侵蚀与斑块保留相应的增加,以及潜在的不安全的释放浓度的元素由于磨损和解散。牙科陶瓷的化学稳定性很好。 With the exception of the excessive exposure to acidulated fluoride, ammonium fluoride, or hydrofluoric acid, there is little risk of surface degradation of virtually all current dental ceramics. Extensive exposure to acidulated fluoride is a possible problem for individuals with head and/or neck cancer who have received large doses of radiation. Such fluoride treatment is necessary to minimize tooth demineralization when saliva flow rates have been reduced because of radiation exposure to salivary glands. Porcelain surface stains are also lost occasionally when abraded by prophylaxis pastes and/or acidulated fluoride. In each case, the solutes are usually not ingested. Further research that uses standardized testing procedures is needed on the chemical durability of dental ceramics. Accelerated durability tests are desirable to minimize the time required for such measurements. The influence of chemical durability on surface roughness and the subsequent effect of roughness on wear of the ceramic restorations as well as of opposing structures should also be explored on a standardized basis. Thermo luminescence (TL) emission of dental ceramics could be potentially used for retrospective dosimeter purposes as this allows a quick and reliable dose assessment in case of nuclear accident or bad use of a nuclear attack. This paper reports on the chemical and luminescence characterization of glass, Feld spathic and lithium dislocate glass ceramic (LS₂)。瑞典和土耳其牙科陶瓷由二阶Ivoclar考虑:(i)的剂量响应范围10 Gy 6.9 kGy的显示一个线性剂量效应在低剂量值高达36 Gy(玻璃和菲尔德多晶石的陶瓷)和显示子线性行为从12 Gy 6 kGy的(锂打乱玻璃陶瓷),(2)一个TL信号的再现性发光曲线下的面积增加约25%,此前10周期玻璃和锂二矽酸盐陶瓷和增加约30%,此前七个周期为菲尔德多晶石的陶瓷、(3)发光的稳定性与运行时间和发射(iv)升温速率的影响。玻璃、硅酸锂和菲尔德多晶石的陶瓷显示一个复杂UV-blue发光排放,可以分别安装在五和四组组件假设一阶动力学行为。单片氧化锆修复是一个可接受的治疗选项恢复牙医和牙科美学的发展趋势。数字牙科的简化制造单片氧化锆修复。氧化锆陶瓷引入了一个机会来实现审美和机械修复的要求。这是很少发现在牙科陶瓷。单片氧化锆修复代表一个可接受的耐久性,与金属陶瓷修复,而他们是优于金属陶瓷修复美学;然而,困难来获得一个最优的阴影复制和色彩搭配整体氧化锆修复仍然存在。这些修复的颜色可能会影响生产流程,实验室程序和临床因素。 Manufacturing processes determine basic optical properties of zirconia ceramics. Different laboratory procedures may create optical changes in zirconia ceramics. Also clinical factors such as dental background, cement, and zirconia restoration features may affect the resulting color. This literature review aimed to discuss potent factors in the colour of monolithic zirconia restorations. An electronic search of the PubMed/Google Scholar database was performed to key terms of background, cement, ceramic; colour, aesthetics, shade, spectrophotometry, thickness, translucency, and zirconia were used both individually and simultaneously. Also, a manual search was conducted, and five classic articles of colour science were added. Thus 192 articles were included. In the last decade, shade reproduction of monolithic zirconia restorations has been highly regarded; however, further improvements are required in the manufacturing process to produce tooth-like zirconia ceramics. An aesthetic guideline named background-cement-ceramic colour harmony was suggested in this study; however, more clinical practice guidelines should be established for monolithic zirconia restorations on aesthetics, and therefore, more studies are required.