Mechanism of Er:YAG laser-induced ablation of dental hard substances

Raimund Hibst; Ulrich Keller D.D.S.

doi:10.1117/12.148318

21 July 1993 Mechanism of Er:YAG laser-induced ablation of dental hard substances

Raimund Hibst, Ulrich Keller D.D.S.

Proceedings Volume 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II; (1993) https://doi.org/10.1117/12.148318
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Er:YAG laser ablation was investigated by fast photography in a Schlieren optic setup. The results support the idea of continuous, thermally driven microexplosion type of ablation, which is based on the inhomogeneous distribution of strong (water) and weak absorbers (hydroxyapatite). Sudden vaporization and heating of the water content leads to a very effective material removal by bursting off the solid tissue components. Material is ejected in the form of particles when the threshold energy density for ablation (about 3 J cm^-2) is reached. For high radiant exposure, initial plume velocity is in the order of the speed of sound in air. After leaving the tissue surface, particles are heated by the still incoming laser radiation, causing glowing and melting. No surface plasma and only weak pressure waves caused by individual spikes were observed.

Citation Download Citation

Raimund Hibst and Ulrich Keller D.D.S. "Mechanism of Er:YAG laser-induced ablation of dental hard substances", Proc. SPIE 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II, (21 July 1993); https://doi.org/10.1117/12.148318

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available