Scanning electron microscopy study of cavity preparation in deciduous teeth using the Er:YAG laser with different powers
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Sun Zhang & Tao Chen & Li-hong Ge
- چاپ و سال / کشور: 2010
Description
Using scanning electron microscopy (SEM) we evaluated the morphology of cavity surfaces in deciduous teeth prepared in vitro with the Er:YAG laser with different power parameters. Eight extracted cavity-free deciduous teeth with an intact crown were prepared using a traditional handpiece or an Er:YAG laser with different parameters (10 Hz/200 mJ, 10 Hz/300 mJ and 10 Hz/400 mJ). Samples were then processed and cavity surface morphology was evaluated by SEM to detect open dentinal tubules, or melting or cracking of the dentin. SEM showed that laser cavity preparation in deciduous teeth using different parameters left no smear layer and the dentinal tubules were clear. Dentin melting was not seen after cavity preparation at 200 mJ or 300 mJ, while visible dentin melting and cracks were detected at 400 mJ. The use of the laser at 10 Hz/200 mJ and 10 Hz/ 300 mJ for cavity preparation in deciduous teeth is safe and effective, but higher powers may damage the dentin.
Lasers Med Sci DOI 10.1007/s10103-010-0854-1 Received: 18 July 2010 / Accepted: 21 October 2010
