XPS analysis of the dentin irradiated by Er: YAG laser.
The aim of this study was to investigate the effect of Er:YAG laser irradiation on human dentin surface using X-ray photoelectron spectroscopy (XPS). 10 human dentin disks were prepared from extracted human molars for XPS analysis. These specimens were divided into two groups of five: a control group and group that were irradiated by an Er:YAG laser beam (100 mJ, 1Hz). All specimens were analyzed by XPS over a wide scanning range and narrow scanning ranges. The Ca/P ratio was calculated from the XPS results. In the results, the binding energies of Ca, P, and N in the laser-irradiated group were higher than those in the control group. The Ca/P ratio of the Er:YAG laser irradiated group (1.24+/-0.05) was significantly lower than that of the control group (1.52+/-0.16). This study showed that Er:YAG laser irradiation decreased Ca/P ratio and denatured the collagen of human dentin.
Omae
Masanori
M
Department of Operative Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan. naema.dds@kpb.biglobe.ne.jp
Shinnou
Yasuo
Y
Tanaka
Kumiko
K
Abo
Tomoko
T
Nakata
Takashi
T
Suzuki
Koichiro
K
Hatsuoka
Yoshinori
Y
Iwata
Naohiro
N
Yoshikawa
Kazushi
K
Nishitani
Yoshihiro
Y
Yamamoto
Kazuyo
K
Yoshiyama
Masahiro
M
D002118:Calcium / Q000032:analysis / Q000737:chemistry; D003094:Collagen / Q000737:chemistry / Q000528:radiation effects; D001840:Dental Bonding; D003804:Dentin / Q000737:chemistry / Q000528:radiation effects*; D006801:Humans; D053844:Lasers, Solid-State / Q000009:adverse effects*; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D056951:Photoelectron Spectroscopy; D011489:Protein Denaturation; D013499:Surface Properties
D010758:Phosphorus; D003094:Collagen; D009584:Nitrogen; D002118:Calcium