Int J Prosthodont. 2021 Jan-Feb;34(1):120-125. doi: 10.11607/ijp.6504.
This clinical report presents the use of a modified polyetheretherketone (PEEK) post and core in order to support a lithium disilicate ceramic crown for a maxillary lateral incisor. When considering post-and-core restorations, material flexibility is essential to prevent root fractures. The low elastic modulus of PEEK (4 GPa) could result in lower root fracture rates, preserving tooth structure and favoring tooth re-restoration if the post fractures. PEEK is biocompatible, presents adequate bond strength with dentin when bonded with a resin cement, and can be used under ceramic restorations because of its white, esthetic color. PEEK posts and cores could also cost less when fabricated using common laboratory procedures. Polyetheretherketone (PEEK) posts and cores could be a viable alternative to rigid cast or zirconia posts, or even to fiber-reinforced composite posts, especially when combined with lithium disilicate crowns.
本临床报告介绍了一种改良的聚醚醚酮（PEEK）桩核的应用，用于支撑上颌侧切牙的二硅酸锂陶瓷冠。在考虑桩核修复时，材料的柔韧性对于防止根折至关重要。PEEK 的低弹性模量（4GPa）可能会降低根折的发生率，保留牙体结构，并在桩折时有利于再次修复。PEEK 具有生物相容性，与牙本质黏结时具有足够的黏结强度，并且可以在陶瓷修复体下使用，因为它具有白色的美观颜色。使用常见的实验室程序制作时，PEEK 桩核的成本也可能更低。PEEK 桩核可能是刚性铸造或氧化锆桩的可行替代品，甚至是纤维增强复合材料桩的替代品，尤其是与二硅酸锂冠结合使用时。
