Immobilization of cell adhesive protein on dental implant

点击翻译按钮获取中文摘要

The aim of this study is to bound fibronectin directly on tresyl chloride (2, 2, 2 -trifluoroethanesulfonyl chloride) treated titanium surface for the development of tight connection of dental implant to gingival and/or epithelial tissue. Basic terminal OH groups of mirror polished titanium were reacted with tresyl chloride at 37 ℃ for 2 days. Tresylated titanium disk was immersed into the fibronectin/PBS solution for 24 h at 37 ℃.The activation reaction of basic OH of titanium with tresyl chloride was confirmed by F1s and O1s spectra in the measurement of X-ray photoelectron spectroscopy (XPS) and -O-S-O_2 bonds in the measurement of the Fourier transform infrared Reflection-Absorption spectrometer (FT-IR-Ras). XPS spectra after the reaction of fibronectin with titanium demonstrated the remarkable effect of the activation of terminal OH groups with tresyl chloride treatment. N1s peak derived from attached fibronectin was still remaining after 60 s argon-ion etching on the tresylated titanium. On the contrary N1s peak of the specimen without tresyl chloride treatment was almost disappeared after only 10 s argon-ion etching. Direct attachment of fibronectin to tresylated titanium was not removed after 60 s ultrasonic cleaning.Fibronectin, well-known cell-adhesive proteins, could be easily attached on thetitanium surface using tresyl chloride activation technique.