Restorative Dentistry, Dundee Dental School, University of Dundee, Park Place, Dundee DD1 4HN, UK.
J Dent. 2010 May;38(5):361-8. doi: 10.1016/j.jdent.2010.01.009. Epub 2010 Feb 1.
This literature review assessed how changing the metal substructure or ceramic substructure affected the colour of samples or restorations after they have been overlaid by veneering ceramic. SOURCES AND STUDY SELECTION: Studies indexed in journals in MEDLINE were retrieved by searching with the terms "metal, ceramic, substructure, coping, colour and shade." The articles were screened for further relevant investigations. The colour co-ordinates (Lab*) and information relating to the substructure and veneering ceramic were recorded or calculated from the relevant articles.
No clinical studies were identified. It was found that gold-backed samples were lighter and had different a* and b* values from those backed with base metal and silver-palladium. Colour differences were also found between different all-ceramic copings after the application of the veneering ceramic. However, no studies used the same protocol for all-ceramic and metal-ceramic specimens making comparisons impossible. Some of the colour differences observed would have been perceptible in a clinical setting.
Altering the substructure of an extra-coronal restoration changed its colour. This potentially may lead to additional laboratory and clinical time to produce an aesthetic restoration.
本文综述评估了改变金属底层结构或陶瓷底层结构后，覆盖饰面陶瓷后样本或修复体的颜色变化。
通过在 MEDLINE 期刊中检索“金属、陶瓷、底层结构、牙冠、颜色和色调”等术语，检索到已索引的研究。对这些文章进行筛选，以进一步寻找相关研究。从相关文章中记录了颜色坐标（Lab*）以及与底层结构和饰面陶瓷相关的信息，或从这些文章中计算出颜色坐标（Lab*）以及与底层结构和饰面陶瓷相关的信息。
没有发现临床研究。结果发现，金背样本比基底金属和银钯背样本更浅，且 a和 b值不同。在应用饰面陶瓷后，不同的全陶瓷牙冠也存在颜色差异。然而，没有研究对全陶瓷和金属陶瓷样本使用相同的方案，因此无法进行比较。一些观察到的颜色差异在临床环境中可能是可察觉的。
改变外冠修复体的底层结构会改变其颜色。这可能需要额外的实验室和临床时间来制作美观的修复体。
