Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation

The aim of this study was to evaluate and compare the morphological changes that occur in dentine after femtosecond laser irradiation and after mechanical treatment. The duration of the laser pulse is an important parameter, because within the time frame of the pulse heat diffusion plays a very impo...

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Autores: Portillo Muñoz, María, Lorenzo Luengo, María Cruz, Sánchez Llorente, José Miguel, Peix Sánchez, Manuel, Albaladejo Martínez, Alberto Francisco, García, Ana, Moreno Pedraz, Pablo Manuel
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Recursos:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/146626
Acesso em linha:http://hdl.handle.net/10366/146626
Access Level:acceso abierto
Palavra-chave:femtosecond
Laser
Dentine
Thermal effects
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spelling Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiationPortillo Muñoz, MaríaLorenzo Luengo, María CruzSánchez Llorente, José MiguelPeix Sánchez, ManuelAlbaladejo Martínez, Alberto FranciscoGarcía, AnaMoreno Pedraz, Pablo ManuelfemtosecondLaserDentineThermal effectsThe aim of this study was to evaluate and compare the morphological changes that occur in dentine after femtosecond laser irradiation and after mechanical treatment. The duration of the laser pulse is an important parameter, because within the time frame of the pulse heat diffusion plays a very important role in the mechanism of interaction between the light and the tissue. Six totally impacted human third molars were sectioned into sheets approximately 1 mm thick with an Accutom-50 precision cutting machine. The samples were randomly divided into two groups according to their cavity preparation: mechanical cavity preparation and laser cavity preparation. The samples were then examined by light microscopy and scanning electron microscopy. There were clear differences in the results obtained with the two techniques. Cavities prepared with the laser with pulses of <1 ps showed no microcracks, and the treated surface displayed a rough and irregular aspect with no smear layer and exhibited open dentinal tubules. On the contrary, cavities made with a rotatory instrument had a smooth surface and microcracks, a broad area of carbonization and merging, occluded dentinal tubules and a smear layer. This study showed that human dentine can be successfully ablated with the ultrashort pulse laser.A.G. and P.M. acknowledge the support of Spanish Ministerio de Ciencia e Innovación through the Consolider Program SAUUL (CSD2007-00013) and research project FIS2009-09522, from Junta de Castilla y León through the Program for Groups of Excellence (GR27) and of the EC Seventh Framework Programme (LASERLAB-EUROPE, grant agreement no. 228334). We also acknowledge the support of the Centro de Laseres Pulsados, CLPU, Salamanca, Spain.202120212010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10366/146626reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésCSD2007-00013FIS2009-09522LASERLAB-EUROPE, grant agreement no. 228334Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1466262026-06-07T06:28:51Z
dc.title.none.fl_str_mv Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
title Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
spellingShingle Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
Portillo Muñoz, María
femtosecond
Laser
Dentine
Thermal effects
title_short Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
title_full Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
title_fullStr Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
title_full_unstemmed Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
title_sort Morphological alterations in dentine after mechanical treatment and ultrashort pulse laser irradiation
dc.creator.none.fl_str_mv Portillo Muñoz, María
Lorenzo Luengo, María Cruz
Sánchez Llorente, José Miguel
Peix Sánchez, Manuel
Albaladejo Martínez, Alberto Francisco
García, Ana
Moreno Pedraz, Pablo Manuel
author Portillo Muñoz, María
author_facet Portillo Muñoz, María
Lorenzo Luengo, María Cruz
Sánchez Llorente, José Miguel
Peix Sánchez, Manuel
Albaladejo Martínez, Alberto Francisco
García, Ana
Moreno Pedraz, Pablo Manuel
author_role author
author2 Lorenzo Luengo, María Cruz
Sánchez Llorente, José Miguel
Peix Sánchez, Manuel
Albaladejo Martínez, Alberto Francisco
García, Ana
Moreno Pedraz, Pablo Manuel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv femtosecond
Laser
Dentine
Thermal effects
topic femtosecond
Laser
Dentine
Thermal effects
description The aim of this study was to evaluate and compare the morphological changes that occur in dentine after femtosecond laser irradiation and after mechanical treatment. The duration of the laser pulse is an important parameter, because within the time frame of the pulse heat diffusion plays a very important role in the mechanism of interaction between the light and the tissue. Six totally impacted human third molars were sectioned into sheets approximately 1 mm thick with an Accutom-50 precision cutting machine. The samples were randomly divided into two groups according to their cavity preparation: mechanical cavity preparation and laser cavity preparation. The samples were then examined by light microscopy and scanning electron microscopy. There were clear differences in the results obtained with the two techniques. Cavities prepared with the laser with pulses of <1 ps showed no microcracks, and the treated surface displayed a rough and irregular aspect with no smear layer and exhibited open dentinal tubules. On the contrary, cavities made with a rotatory instrument had a smooth surface and microcracks, a broad area of carbonization and merging, occluded dentinal tubules and a smear layer. This study showed that human dentine can be successfully ablated with the ultrashort pulse laser.
publishDate 2010
dc.date.none.fl_str_mv 2010
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/146626
url http://hdl.handle.net/10366/146626
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv CSD2007-00013
FIS2009-09522
LASERLAB-EUROPE, grant agreement no. 228334
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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