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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (4): 044010.doi: 10.1088/2058-6272/aaa6be

• Plasma Biomedicine • Previous Articles     Next Articles

Influences of the cold atmospheric plasma jet treatment on the properties of the demineralized dentin surfaces

Xiaoming ZHU (朱晓鸣)1,3, Heng GUO (郭恒)2,3, Jianfeng ZHOU (周建锋)1 , Xiaofei ZHANG (张晓菲)2, Jian CHEN (陈坚)2,Jing LI (李静)2 , Heping LI (李和平)2,4 and Jianguo TAN (谭建国)1,4   

  

  1. 1 Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, People’s Republic of China 2 Department of Engineering Physics, Tsinghua University, Beijing 100084, People’s Republic of China
  • Received:2017-11-02 Published:2018-01-09
  • Supported by:

    supported by National Natural Science Foundation of China (Nos. 11475103 and 81200805) and Beijing Natural Science Foundation (No. 7162204).

Abstract:

Improvement of the bonding strength and durability between the dentin surface and the composite resin is a challenging job in dentistry. In this paper, a radio-frequency atmospheric-pressure glow discharge (RF-APGD) plasma jet is employed for the treatment of the acid-etched dentin surfaces used for the composite restoration. The properties of the plasma treated dentin surfaces and the resin–dentin interfaces are analyzed using the x-ray photoemission spectroscopy, contact angle goniometer, scanning electron microscope and microtensile tester. The experimental results show that, due to the abundant chemically reactive species existing in the RF-APGD plasma jet under a stable and low energy input operating mode, the contact angle of the plasma-treated dentin surfaces decreases to a stable level with the increase of the atomic percentage of oxygen in the specimens; the formation of the long resin tags in the scattered clusters and the hybrid layers at the resin–dentin interfaces significantly improve the bonding strength and durability. These results indicate that the RF-APGD plasma jet is an effective tool for modifying the chemical properties of the dentin surfaces, and for improving the immediate bonding strength and the durability of the resin-dentin bonding in dentistry.

Key words: high-frequency and RF discharges, plasma-material interactions, plasma dentistry