Home Subscription Services
 
   

 
Journal of Laser Applications
Jola Home Page
About the Editor
Editorial Board
Author Guidelines
Submission Form
Reprints / Articles
Permissions
Advertising
MEDLINE Search
 
 
 
 
 
FacebookTwitter
Quintessence Publishing: Journals: JOLA

 

The Journal of Oral Laser Applications

Edited by Prof Dr Andreas Moritz and Prof G. Lynn Powell

Official publication of the European Society for Oral Laser Applications

ISSN (print) 1473-7809 • ISSN (online) 1867-5611

Publication:
JOLA
Winter 2007
Volume 7 , Issue 4

Pages: 225-231
Back
Share Abstract:

Coaxial Water Mist Spray Alters the Ablation Properties of Human Radicular Dentine for the Holmium:YAG Laser

George, Roy / Walsh, Laurence J

Purpose: This laboratory study examined the ablative processes in human radicular dentine using the Ho:YAG laser (2100 nm wavelength, pulse duration 250-350 μs, spot size 320 μm). Materials and Methods: The study followed a matrix design, with pulse energies from 0.5 to 1.6 J and pulse frequencies from 1 to 6 Hz, in either the presence or absence of water mist spray (1.5 ml/min). Dentine surfaces of extracted teeth were lased with collateral water mist spray or without irrigation. Diameters and depths of impact craters were measured, and the nature of the lased surface was assessed using light microscopy and SEM. Results: When used with collateral water mist spray, the ablation craters had smooth outlines indicative of an entirely explosive process without adjacent collateral damage. In contrast, in the absence of water spray, peripheral carbonization and vitrification zones were seen. There was a significant correlation between the depth and diameter of the craters and the applied energy of the laser pulse. Conclusions: These laboratory findings suggest that when used with collateral water spray, the Ho:YAG laser can ablate human dentine in a controlled manner without adverse thermal effects. Because it can be delivered through glass optical fibers, this wavelength may have application for dental hard tissue preparation or modification.

Keywords: laser dentistry, holmium lasers, dentine ablation, SEM evaluation

Full Text PDF File | Order Article

 

 
  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog