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Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources

Lasers have advantages as bone surgical tools over mechanical methods, but two goals should be achieved to assure its use: Similar ablation rates to those obtained with mechanical tools (1 mm(3)/s at least) and to avoid thermal damage, a condition that can prevent proper bone healing. We present res...

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Autores principales: Canteli, David, Muñoz-García, Cristina, Morales, Miguel, Márquez, Andrés, Lauzurica, Sara, Arregui, Juan, Lazkoz, Aritz, Molpeceres, Carlos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6766215/
https://www.ncbi.nlm.nih.gov/pubmed/31505836
http://dx.doi.org/10.3390/ma12182916
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author Canteli, David
Muñoz-García, Cristina
Morales, Miguel
Márquez, Andrés
Lauzurica, Sara
Arregui, Juan
Lazkoz, Aritz
Molpeceres, Carlos
author_facet Canteli, David
Muñoz-García, Cristina
Morales, Miguel
Márquez, Andrés
Lauzurica, Sara
Arregui, Juan
Lazkoz, Aritz
Molpeceres, Carlos
author_sort Canteli, David
collection PubMed
description Lasers have advantages as bone surgical tools over mechanical methods, but two goals should be achieved to assure its use: Similar ablation rates to those obtained with mechanical tools (1 mm(3)/s at least) and to avoid thermal damage, a condition that can prevent proper bone healing. We present results of cow femoral bone with a 355 nm nanosecond (ns) and a 1064 nm picosecond (ps) pulsed laser sources that allow us to discuss the influence on the process of pulse duration and the selective ablation through high energy absorption (as bone highly absorbs 355 nm radiation). The treated samples were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. The evaluation of the thermal effects produced in the samples shows clear differences between both laser sources: On one hand, the ns laser allows reaching high ablation rates (around 1 mm(3)/s); Raman spectra show no signal of bone carbonization, but unavoidable thermal effects in the form of melted and solidified material have been observed by electron microscopy in the samples treated with this laser. On the other hand, ablation without any sign of thermal effects is obtained using the ps laser, but with lower ablation rates, (around 0.15 mm(3)/s).
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spelling pubmed-67662152019-09-30 Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources Canteli, David Muñoz-García, Cristina Morales, Miguel Márquez, Andrés Lauzurica, Sara Arregui, Juan Lazkoz, Aritz Molpeceres, Carlos Materials (Basel) Article Lasers have advantages as bone surgical tools over mechanical methods, but two goals should be achieved to assure its use: Similar ablation rates to those obtained with mechanical tools (1 mm(3)/s at least) and to avoid thermal damage, a condition that can prevent proper bone healing. We present results of cow femoral bone with a 355 nm nanosecond (ns) and a 1064 nm picosecond (ps) pulsed laser sources that allow us to discuss the influence on the process of pulse duration and the selective ablation through high energy absorption (as bone highly absorbs 355 nm radiation). The treated samples were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. The evaluation of the thermal effects produced in the samples shows clear differences between both laser sources: On one hand, the ns laser allows reaching high ablation rates (around 1 mm(3)/s); Raman spectra show no signal of bone carbonization, but unavoidable thermal effects in the form of melted and solidified material have been observed by electron microscopy in the samples treated with this laser. On the other hand, ablation without any sign of thermal effects is obtained using the ps laser, but with lower ablation rates, (around 0.15 mm(3)/s). MDPI 2019-09-09 /pmc/articles/PMC6766215/ /pubmed/31505836 http://dx.doi.org/10.3390/ma12182916 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Canteli, David
Muñoz-García, Cristina
Morales, Miguel
Márquez, Andrés
Lauzurica, Sara
Arregui, Juan
Lazkoz, Aritz
Molpeceres, Carlos
Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title_full Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title_fullStr Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title_full_unstemmed Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title_short Thermal Effects in the Ablation of Bovine Cortical Bone with Pulsed Laser Sources
title_sort thermal effects in the ablation of bovine cortical bone with pulsed laser sources
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6766215/
https://www.ncbi.nlm.nih.gov/pubmed/31505836
http://dx.doi.org/10.3390/ma12182916
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