Combination of Polydopamine Coating and Plasma Pretreatment to Improve Bond Ability Between PEEK and Primary Teeth.

Rui Teng,Yilong Cheng,Rui Ding,Dandan Pei,Yunhe Zhang,Ang Li,Yanfeng Zhang,Xiaodan Zhao,Yuchen Meng,Jie Liu

doi:10.3389/fbioe.2020.630094

Abstract

Preformed crowns are preferred to reduce the failure risk of restoration of primary teeth, but some drawback of conventional material is still a main barrier for their clinical use. Polyether etherketone (PEEK), a tooth colored, high-performance thermoplastic polymer, has been recognized as a promising alternative to manufacture the restoration of primary teeth. However, the hydrophobic surface and low surface energy of PEEK make it hard to establish a strong and durable adhesion. In this study, we have evaluated a modification method of polydopamine (PDA) coating with plasma pretreatment for the PEEK films by physical and chemical characterization, bonding properties, and biocompatibility. The surface properties of PEEK were well-characterized by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The adhesive strength of the PEEK films was greatly improved without significant reduction of the proliferation rate of human gingival fibroblast cells in MTT and Live/Dead assays. Therefore, PDA coating with plasma pretreatment may give a new solution for effective clinical application of PEEK in primary performed crowns.

Highlights

Dental caries in the primary teeth is a highly prevalent public health problem (Ludwig et al, 2014; Innes et al, 2015; Smaïl-Faugeron et al, 2018)
The Polyether etherketone (PEEK) film was immersed into DA solution at room temperature under basic condition to initiate the self-oxidative polymerization for surface modification (Lee et al, 2007)
We found that a uniform deposition of PDA particles was observed, and that the PEEK surface was almost fully covered after incubation for 24 h, indicating the efficient coating of PDA on the plasma-treated PEEK surface (Figure 1)

Summary

Introduction

Dental caries in the primary teeth is a highly prevalent public health problem (Ludwig et al, 2014; Innes et al, 2015; Smaïl-Faugeron et al, 2018). The untreated primary dental caries develop rapidly and frequently, leading to discomfort, pain, and further infection (Ortiz et al, 2014; Monte-Santo et al, 2018; Schwendicke et al, 2018; Zeng et al, 2018; Vollu et al, 2019). Despite recommendations for preformed metal crowns, silver-colored appearance is still a main barrier for their clinical use (Santamaria et al, 2014, 2018; Maciel et al, 2017; Lopez-Cazaux et al, 2019).

Methods

Results

Conclusion