Ricci Weber Adad, Fahl Newton
Department of Social Dentistry, Sao Paulo State University UNESP, Araraquara, Brazil.
Private Practice, Sao Carlos, Brazil.
J Esthet Restor Dent. 2023 Jan;35(1):7-18. doi: 10.1111/jerd.13021. Epub 2023 Feb 6.
For decades, the dental community has discussed which materials would be the ideal substitutes for lost tooth structure. Initially, the biomimetic approach advocated that feldspathic ceramics would be the material of choice for enamel. However, given the complexity of obtaining excellent dental technicians and the financial cost, are composite resins a suitable replacement? The optical properties with opalescence and fluorescence effects, as well as this material's high fracture toughness, indicate it as a long-lasting restorative material. However, because this material depends on the operator's expertise, knowledge of layering techniques and the selection of each material for the different layers is required. Thus, knowledge of the polychromatic technique through a bioinspired approach is necessary to obtain results of life-like restorations. This article aims to review the polychromatic layering technique (PLT), considering the optical and mechanical properties of dentin and enamel and correlating these properties with current composite resins to guide clinicians in selecting the most suitable restoratives for their clinical challenges.
The polychromatic layering technique is revisited, cross-referencing the properties of dentin and enamel with current composite resin restoratives and their biomimetic properties. The effectiveness and predictability of the PLT are corroborated in clinical cases of varying degrees of difficulty requiring different layering strategies.
After the bio-inspired analysis, using nature as a model to be understood and followed, it is possible to note how the polychromatic technique remains current and viable in mimicking nature, providing esthetic and natural results in the layering of composite resins.
Composite resins effectively replicate the optical and mechanical characteristics of natural dentin and enamel through the bioinspired approach presented by the polychromatic layering technique.
几十年来，牙科界一直在讨论哪种材料将是缺失牙体结构的理想替代品。最初，仿生方法主张长石质陶瓷将是牙釉质的首选材料。然而，考虑到获得优秀牙科技术人员的复杂性和经济成本，复合树脂是否是合适的替代品呢？具有乳光和荧光效果的光学特性以及这种材料的高断裂韧性，表明它是一种持久的修复材料。然而，由于这种材料依赖于操作者的专业知识，需要了解分层技术以及为不同层选择每种材料的知识。因此，通过仿生方法了解多色技术对于获得逼真修复效果是必要的。本文旨在回顾多色分层技术（PLT），考虑牙本质和牙釉质的光学和机械性能，并将这些性能与当前的复合树脂相关联，以指导临床医生为其临床挑战选择最合适的修复材料。
重新审视多色分层技术，将牙本质和牙釉质的特性与当前复合树脂修复材料及其仿生特性进行交叉参考。在需要不同分层策略的不同难度程度的临床病例中，证实了PLT的有效性和可预测性。
经过仿生分析，以自然为模型去理解和遵循，可以注意到多色技术在模仿自然方面如何仍然是最新的且可行的，在复合树脂分层中提供美观和自然的效果。
复合树脂通过多色分层技术提出的仿生方法有效地复制了天然牙本质和牙釉质的光学和机械特性。
