Ti:sapphire femtosecond laser ablation of dental enamel, dentine, and cementum.
This paper reports an investigation into the characteristics of femtosecond laser (800-nm central wavelength) in the ablation of human dental enamel, dentine, and cementum at various laser fluences from 0.2 to 3.68 J/cm(2) with single and multiple pulses. The femtosecond laser interaction with cemen...
| Publicado en: | Lasers in Medical Science Vol. 27; no. 1; pp. 197 - 205 |
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| Autores principales: | , , , , , , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jan2012
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104439903&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104439903 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02688921 O4P jtl: Lasers in Medical Science issn: 02688921 maglogo: N pubinfo: dt: Jan2012 vid: 27 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104439903 NLM21611745 2011750582 10.1007/s10103-011-0932-z NLM21611745 104439903 ppf: 197 ppct: 8 formats: tig: atl: Ti:sapphire femtosecond laser ablation of dental enamel, dentine, and cementum. aug: au: Ji L Li L Devlin H Liu Z Jiao J Whitehead D Ji, Lingfei Li, Lin Devlin, Hugh Liu, Zhu Jiao, Jiao Whitehead, David affil: Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK sug: subj: Dental Cementum Radiation Effects Dental Enamel Radiation Effects Dentin Radiation Effects Laser Therapy Equipment and Supplies Laser Therapy Methods Microscopy, Electron, Scanning Spectrum Analysis, Raman ab: This paper reports an investigation into the characteristics of femtosecond laser (800-nm central wavelength) in the ablation of human dental enamel, dentine, and cementum at various laser fluences from 0.2 to 3.68 J/cm(2) with single and multiple pulses. The femtosecond laser interaction with cementum is reported for the first time. Ablation thresholds were determined to be 0.58, 0.44, and 0.51 J/cm(2) for enamel, dentine, and cementum, respectively. Under the average laser fluences of 1.13 to 3.68 J/cm(2), clean ablated surfaces without debris and microcracks were obtained. Laser fluence was found to influence the ablated diameter and depth, whereas under a certain fluence, pulse number only affects the depth, without affecting the diameter. The ablation mechanism is found to be based on multi-photon absorption, not previously known for femtosecond laser ablation of dental materials. The low thermal loads of 0.708, 1.44, and 0.404 J/cm(3) required for ablating enamel, dentine, and cementum, determined for the first time, are beneficial for minimizing the heat-affected zones and micro-damage. The Raman spectroscopic analysis of phosphate shows that the chemical components of the tooth remain intact before and after the fs-laser ablation. It also shows that different dental tissues respond differently to the laser irradiation. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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