Effects of Er:YAG laser irradiation on human dentin: Polarizing microscopic, light microscopic and microradiographic observations, and FT-IR analysis
✍ Scribed by Yaeko Ishizaka; Toru Eguro; Toru Maeda; Hisayoshi Tanaka
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 196 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0196-8092
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✦ Synopsis
Abstract
Background and Objectives
The effects of Er:YAG laser irradiation on dentin have not been sufficiently investigated. The purpose of this study was to investigate the effects of Er:YAG laser irradiation on dentin.
Study Design/Materials and Methods
After cavities were prepared using Er:YAG laser irradiation or rotary cutting instruments, histological observations of cavity‐floor dentin utilizing polarizing microscopy, microradiography and light microscopy, and analysis of composition of cavity‐floor dentin using Fourier‐transformed (FT‐IR) spectrometry were conducted.
Results
In the laser‐treated side, a deeply stained basophilic layer was observed. The number of odontoblastic processes present was obviously less in the laser‐treated side than in the bur‐treated side. FT‐IR analysis revealed that compared to the bur‐treated side, a broad background peak at around 1,600 cm^−1^ was present.
Conclusions
Er:YAG laser irradiation might have denatured the organic materials of dentin. Lasers Surg. Med. 31:171–176, 2002. © 2002 Wiley‐Liss, Inc.