Warning: include(/includes/code.php) [function.include]: failed to open stream: No such file or directory in /home/quintpub/public_html/journals/jola/abstract.php on line 1

Warning: include() [function.include]: Failed opening '/includes/code.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/quintpub/public_html/journals/jola/abstract.php on line 1
Super VSP Er: YAG Pulses for Fast and Precise Cavity Preparation
Home Subscription Services

Journal of Laser Applications
Jola Home Page
About the Editor
Editorial Board
Author Guidelines
Submission Form
Reprints / Articles
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

Fall 2004
Volume 4 , Issue 3

Pages: 171-173
Share Abstract:

Super VSP Er: YAG Pulses for Fast and Precise Cavity Preparation

Lukac, Matjaz/Marincek, Marko/Grad, Ladislav

Purpose: The aim of this in vitro study was to measure the influence of heat diffusion and debris screening on the ablation efficiency of Er:YAG laser pulses in enamel, and to maximize cavity preparation speeds by using super short (50 Ás) laser pulses. Materials and Methods: Extracted human teeth were irradiated with Er:YAG laser pulses with fixed pulse energy of 450 mJ and variable pulse durations from 50 (super short pulse) to 1000 Ás (very long pulse). The depth and diameter of the craters was measured as a function of pulse duration. The dynamics of ablation debris screening was measured by monitoring the transmission of He-Ne laser light during the formation of the ablation debris cloud. Results: The analysis of the results show that the ablation efficiency increases by a factor of 5 when pulse durations are decreased from 1000 to 50 Ás. The typical debris cloud formation time at 2 mm above the ablated surface was determined to be approximately 50 Ás. Conclusion: The study shows that optimal erbium dental laser pulses are of approximately 50 Ás duration. At this duration, both the heat diffusion and debris screening effects are minimized, leading to very efficient laser drilling. The laser ablation speeds under these conditions are larger than those achieved by classical mechanical burs.

Keywords: lasers, dental cavity preparation, Er:YAG laser irradiation, super short laser pulses, enamel

Full Text PDF File | Order Article


  © 2021 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