Pilot study on laser propagation in maxillary and mandibular bone: Grey level image analysis for optical measurements
| Autor: | Katia Llanos do Vale, Monalisa Jacob Guiselini, Marcelo Betti Mascaro, Nelson H. Koshoji, Kristianne Porta Santos Fernandes, Raquel Agnelli Mesquita-Ferrari, Alessandro Melo Deana, Simone Aleksandra de Moraes, Sandra Kalil Bussadori, Daniela de Fátima Teixeira da Silva |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Light Biophysics Dentistry Pilot Projects Mandible Dermatology Bone healing Radiation Dosage Bone tissue 01 natural sciences law.invention Photometry 010309 optics 03 medical and health sciences 0302 clinical medicine law 0103 physical sciences Maxilla medicine Scattering Radiation Pharmacology (medical) Penetration depth Dental alveolus Orthodontics business.industry Attenuation Absorption Radiation 030206 dentistry Laser medicine.anatomical_structure Oncology Photography Dental business |
| Zdroj: | Photodiagnosis and Photodynamic Therapy. 18:226-231 |
| ISSN: | 1572-1000 |
| Popis: | Background Bone tissue anatomy, density and porosity vary among subjects in different phases of life and even within areas of a single specimen. The optical characteristics of changes in bone tissue are analyzed based on these properties. Photobiomodulation has been used to improve bone healing after surgery or fractures. Thus, knowledge on light propagation is of considerable importance to the obtainment of successful clinical outcomes. Objective This study determines light penetration and distribution in human maxillary and mandibular bones in three different regions (anterior, middle, and posterior). Methods A HeNe laser (633 nm) irradiated maxillary and mandibular bones in the cervical–apical direction. The light propagation and scattering pattern were acquired and the grey level of the images was analyzed. Three-dimensional plots of the intensity profile and attenuation profiles were created. Results Differences in optical properties were found between the mandibular and maxillary bones. The maxilla attenuated more light than the mandible at all sites, leading to a shallower penetration depth. Conclusion Our results provide initial information on the behavior of the propagation of red laser on alveolar bone using an optical method. |
| Databáze: | OpenAIRE |
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