Skip to Main content Skip to Navigation
Master Thesis

Caractérisation de l'ablation de l'émail et de la dentine par une nouvelle source laser picoseconde

Abstract : Nowadays, femtosecond lasers allow enamel and dentin removal without any thermal or mechanical effects, thanks to the plasma-induced ablation process. But what about picosecond lasers, which possess close optical and physical properties, as well as a much lower cost? In this study, 5 ps pulses were applied on healthy enamel and dentin at a frequency of 50 kHz and a wavelength of 532 nm. Energy, scanning speed and number of repeated passages on the dental surface were modulated. Through optical microscopy, profilometry and scanning electron microscopy, the results in dentin showed a clear, well defined, reproducible and non-thermal ablation for energies less than or equal to 2 μJ with a scanning of 5 mm/s. In enamel, melting has always been found, proving an excessively increase of temperature. New research that modulates other parameters such as frequency, use of a refrigerant spray, or use of decayed enamel and dentin, could improve ablation efficiency and help consider using this laser in dentistry.
Document type :
Master Thesis
Complete list of metadatas

https://dumas.ccsd.cnrs.fr/dumas-01561766
Contributor : Frédérique Gambade <>
Submitted on : Thursday, July 13, 2017 - 12:01:04 PM
Last modification on : Wednesday, January 15, 2020 - 9:03:57 AM
Long-term archiving on: : Thursday, January 25, 2018 - 1:12:22 AM

Identifiers

  • HAL Id : dumas-01561766, version 1

Collections

Citation

Clément Hucbourg. Caractérisation de l'ablation de l'émail et de la dentine par une nouvelle source laser picoseconde. Chirurgie. 2017. ⟨dumas-01561766⟩

Share

Metrics

Record views

57

Files downloads

10