Fs‐laser ablation of teeth is temperature limited and provides information about the ablated components
| Autor: | Sebastian Wachsmann-Hogiu, Dan Smith, Marleny Elizabeth Márquez de Martínez Gerbi, Alton Phillips, James W. Chan, Juan C. Ivaldi, Catherine Malinda Harvey, Rebeca Ferraz de Menezes, Zachary J. Smith |
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| Rok vydání: | 2017 |
| Předmět: |
Microscope
Materials science medicine.medical_treatment General Physics and Astronomy Dentistry Fluence General Biochemistry Genetics and Molecular Biology law.invention 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine stomatognathic system law medicine Animals Humans General Materials Science Laser-induced breakdown spectroscopy Laser ablation business.industry Lasers Temperature General Engineering 030206 dentistry General Chemistry Ablation Laser stomatognathic diseases Femtosecond Cattle Thermal damage Laser Therapy business Tooth Biomedical engineering |
| Zdroj: | Journal of Biophotonics. 10:1292-1304 |
| ISSN: | 1864-0648 1864-063X |
| DOI: | 10.1002/jbio.201700042 |
| Popis: | The goal of this work is to investigate the thermal effects of femtosecond laser (fs-laser) ablation for the removal of carious dental tissue. Additional studies identify different tooth tissues through femtosecond laser induced breakdown spectroscopy (fsLIBS) for the development of a feedback loop that could be utilized during ablation in a clinical setting. Scanning Election Microscope (SEM) images reveal that minimal morphological damages are incurred at repetition rates below the carbonization threshold of each tooth tissue. Thermal studies measure the temperature distribution and temperature decay during laser ablation and after laser cessation, and demonstrate that repetition rates at or below 10kHz with a laser fluence of 40 J/cm2 would inflict minimal thermal damage on the surrounding nerve tissues and provide acceptable clinical removal rates. Spectral analysis of the different tooth tissues is also conducted and differences between the visible wavelength fsLIBS spectra are evident, though more robust classification studies are needed for clinical translation. These results have initiated a set of precautionary recommendations that would enable the clinician to utilize femtosecond laser ablation for the removal of carious lesions while ensuring that the solidity and utility of the tooth remain intact. |
| Databáze: | OpenAIRE |
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