Determination of aliphatic C=C bonds on surfaces of FRC posts using microATR-FTIR spectroscopy

Authors :

• Siriporn Arunpraditkul D.D.S., M.Sc.
• Sunita Tipmonta
• Sarapen Phubetarcthavich

Abstract :

Objective The aim of the present study was to investigate aliphatic C=C bonds on surfaces of FRC
posts by micro ATR-FTIR spectroscopy.

Materials and methods Fiber posts were determined aliphatic C=C bonds on post surface by micro
ATR-FTIR spectroscopy using mid infrared (4000-600 cm^-1). The contact area between germanium
crystal and fiber post was 100 μm in diameter circular shape. The spectrum was acquired at 1 μm depth
from post surface. Wavenumbers and transmittance were recorded in each fiber post. The aliphatic
C=C bonds were analyzed from peaks of spectra compared with reference wavenumbers.

Results The peak height of aliphatic C=C bonds at 1638-1636 and 1637-1632 cm^-1 were investigated
on post surface of FRC Postec Plus^® and FibreKleer^® Tapered post which these were not shown on
surface of DT Light post^® and RelyX^TM fiber post.

Conclusion Aliphatic C=C bonds were present on surfaces of FRC Postec Plus^® and FibreKleer^®
Tapered post.

(CU Dent J. 2015;38:129-140)

Keywords :
aliphatic C=C bond; fiber post; micro ATR-FTIR; spectroscopy; surface