Preparation of dental hard tissue with picosecond laser pulses
| Autor: | Andrea Herschel, Lüko Willms, Thomas Pioch, Mark H. Niemz |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Materials science
Enamel paint Scanning electron microscope Plasma parameters medicine.medical_treatment Analytical chemistry Dermatology Excitation temperature Ablation Laser law.invention stomatognathic diseases stomatognathic system law visual_art Picosecond Nd:YAG laser visual_art.visual_art_medium medicine Surgery |
| Zdroj: | Lasers in Medical Science. 11:45-51 |
| ISSN: | 1435-604X 0268-8921 |
| DOI: | 10.1007/bf02161292 |
| Popis: | The aim of this study was to investigate the suitability of picosecond lasers for hard-tissue preparation. Using scanning electron microscopy (SEM) and histological studies, the quality of ablation was examined. There was no thermal or mechanical damage observed. The ablation rates of enamel, dentine and carious enamel and the temperature rise during tissue removal were measured. Using a fast silicon photodiode, the lifetime of the plasma was determined to be 11±3 ns (Nd-YLF, 1.25 mJ pulse−1, pulse duration 30 ps). In order to achieve a better understanding of the ablation process, plasma parameters such as electron density [(5±3)×1017 cm−3] and excitation temperature (4500±2000 ℐg, Nd-YLF, 0.3 mJ pulse−1) were obtained from emission spectra. By examining the line width of singly ionized calcium lines, a difference was found in the ablation of healthy or artificially demineralized enamel, thus allowing the selective removal of caries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink