Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses
Abstract We investigated the effect of femtosecond (fs) laser ablation of enamel and dentin for different pulse wavelengths: infrared (1030 nm), green (515 nm), and ultra-violet (343 nm) and for different pulse separations to determine the optimal irradiation conditions for the precise removal of de...
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-47551-5 |
| _version_ | 1797559851144970240 |
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| author | Ludovic Rapp Steve Madden Julia Brand Ksenia Maximova Laurence J. Walsh Heiko Spallek Omar Zuaiter Alaa Habeb Timothy R. Hirst Andrei V. Rode |
| author_facet | Ludovic Rapp Steve Madden Julia Brand Ksenia Maximova Laurence J. Walsh Heiko Spallek Omar Zuaiter Alaa Habeb Timothy R. Hirst Andrei V. Rode |
| author_sort | Ludovic Rapp |
| collection | DOAJ |
| description | Abstract We investigated the effect of femtosecond (fs) laser ablation of enamel and dentin for different pulse wavelengths: infrared (1030 nm), green (515 nm), and ultra-violet (343 nm) and for different pulse separations to determine the optimal irradiation conditions for the precise removal of dental hard tissues with the absence of structural and compositional damage. The ablation rates and efficiencies were established for all three laser wavelengths for both enamel and dentin at room temperature without using any irrigation or cooling system, and the surfaces were assessed with optical and scanning electron microscopy, optical profilometry, and Raman spectroscopy. We demonstrated that 515 nm fs irradiation provides the highest rate and efficiency for ablation, followed by infrared. Finally, we explored the temperature variations inside the dental pulp during the laser procedures for all three wavelengths and showed that the maximum increase at the optimum conditions for both infrared and green irradiations was 5.5 °C, within the acceptable limit of temperature increase during conventional dental treatments. Ultra-violet irradiation significantly increased the internal temperature of the teeth, well above the acceptable limit, and caused severe damage to tooth structures. Thus, ultra-violet is not a compatible laser wavelength for femtosecond teeth ablation. |
| first_indexed | 2024-03-10T17:51:08Z |
| format | Article |
| id | doaj.art-adb9f2ab179d4509b75a1ef274864c87 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-10T17:51:08Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-adb9f2ab179d4509b75a1ef274864c872023-11-20T09:22:05ZengNature PortfolioScientific Reports2045-23222023-11-0113111010.1038/s41598-023-47551-5Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulsesLudovic Rapp0Steve Madden1Julia Brand2Ksenia Maximova3Laurence J. Walsh4Heiko Spallek5Omar Zuaiter6Alaa Habeb7Timothy R. Hirst8Andrei V. Rode9Laser Physics Centre, Department of Quantum Science and Technology, Research School of Physics, Australian National UniversityLaser Physics Centre, Department of Quantum Science and Technology, Research School of Physics, Australian National UniversityLaser Physics Centre, Department of Quantum Science and Technology, Research School of Physics, Australian National UniversityLaser Physics Centre, Department of Quantum Science and Technology, Research School of Physics, Australian National UniversityThe University of Queensland School of DentistryFaculty of Medicine and Health, The University of Sydney School of DentistryDentroid Pty LtdDentroid Pty LtdDentroid Pty LtdLaser Physics Centre, Department of Quantum Science and Technology, Research School of Physics, Australian National UniversityAbstract We investigated the effect of femtosecond (fs) laser ablation of enamel and dentin for different pulse wavelengths: infrared (1030 nm), green (515 nm), and ultra-violet (343 nm) and for different pulse separations to determine the optimal irradiation conditions for the precise removal of dental hard tissues with the absence of structural and compositional damage. The ablation rates and efficiencies were established for all three laser wavelengths for both enamel and dentin at room temperature without using any irrigation or cooling system, and the surfaces were assessed with optical and scanning electron microscopy, optical profilometry, and Raman spectroscopy. We demonstrated that 515 nm fs irradiation provides the highest rate and efficiency for ablation, followed by infrared. Finally, we explored the temperature variations inside the dental pulp during the laser procedures for all three wavelengths and showed that the maximum increase at the optimum conditions for both infrared and green irradiations was 5.5 °C, within the acceptable limit of temperature increase during conventional dental treatments. Ultra-violet irradiation significantly increased the internal temperature of the teeth, well above the acceptable limit, and caused severe damage to tooth structures. Thus, ultra-violet is not a compatible laser wavelength for femtosecond teeth ablation.https://doi.org/10.1038/s41598-023-47551-5 |
| spellingShingle | Ludovic Rapp Steve Madden Julia Brand Ksenia Maximova Laurence J. Walsh Heiko Spallek Omar Zuaiter Alaa Habeb Timothy R. Hirst Andrei V. Rode Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses Scientific Reports |
| title | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| title_full | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| title_fullStr | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| title_full_unstemmed | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| title_short | Investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| title_sort | investigation of laser wavelength effect on the ablation of enamel and dentin using femtosecond laser pulses |
| url | https://doi.org/10.1038/s41598-023-47551-5 |
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