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Quintessence Publishing: Journals: JOLA


The Journal of Oral Laser Applications

Edited by Prof Dr Andreas Moritz and Prof G. Lynn Powell

Official publication of the European Society for Oral Laser Applications

ISSN (print) 1473-7809 • ISSN (online) 1867-5611

Fall 2007
Volume 7 , Issue 3

Pages: 167-174
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Er:YAG Laser Ablation of Bovine Bone Tissue: Morphological Evaluation and Ablation Rate

Lizarelli, Rosane de Fátima Zanirato / Govone, Angelo Biasi / Pelino, José Eduardo Pelizon / Bagnato, Vanderlei Salvador

Purpose: To compare the depth and volume of cavities produced by ablation on bovine bone tissue using different Er:YAG laser parameters. Materials and Methods: A bovine femur was cut in blocks and wet polished with 600-grit sandpaper. Different energies per pulse (100 mJ, 300 mJ, and 500 mJ) and different frequencies (5 Hz, 10 Hz, and 15 Hz) were used to create microcavities within a 10-s irradiation time. The samples were analyzed under an optical microscope (40X) and SEM for a better definition of the cavities and their features. The ablated volume was calculated and statistically analyzed with Kruskal-Wallis and Dunn tests. Results: The ablation rate in many groups showed significant differences up to 5%, where the energy per pulse was the only significant variable. As energy per pulse increased, so did the ablation rate. Morphological analysis showed differences in the homogeneity of the microcavities. Conclusions: Er:YAG laser is able to promote cold interaction, suggesting a precise tool for bone ablation.

Keywords: bone, ablation rate, Er:YAG, morphology, bovine tissue

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