National Institute of Science and Technology (INCT) – “Basic Optics and Applied to Life Sciences” – IFSC, University of Sao Paulo Biophotonics Center at Instituto Brugnera Zanin, Brazil
Dr. Brugnera received the degree of Doctor in Dentistry from the Federal University of Rio de Janeiro, Brazil. He is Emeritus Professor at the Camilo Castelo Branco University, São Paulo- Brasil and Associate Researcher of National Institutes of Science and Technology in Brazil. He also is an invited Professor of Masters Course “Oral Laser Application” EMDOLA- European Community, University of Liege, Belgium.
He is expert in Laser and a member of the Medical Association of Laser – Roma Italy, past president of the World Federation of Lasers in Dentistry (WFLD), president of the WFLD- South America Division, past President of World Association for Laser Therapy (WALT).
Dr Brugnera is Senior Editor of the Journal Photomedicine and Lasertherapy (USA) and author of 6 books in the area of Laser in Dentistry. He has written more than 150 scientific papers in the lasers field published and more than 200 lectures delivered in Brazil and abroad. Oral Presentation in more 30 countries.
Light is a physical phenomenon, essential to most forms of life on Earth, being an important source of energy for them. The development of techniques using light related to living matter is called biophotonics and is the result of an interface among physics, chemistry, and biology. Laser, since its beginning, put physics and biology in close contact, because it allows a precise exchange of information at a molecular level.
In this lecture, we present two different types of treatments with Photobiomodulation (PBMT) based on clinical and scientific evidence. The first research is about dentinal hypersensitivity treatment as a result of our clinical studies of laser application therapy based on translational preclinical dental research, which includes the possibility of preventing dentinal sensitivity in the preparation and cementation of porcelain laminates by applying PTL. The parameters were 655nm, red laser, 40 mW, 2 J per point, total number of points for each tooth was 4. 91.7% of the treated teeth showed no pain. The second research was on patients who have lost interdental papilla and thus developed “black triangle”, that has a negative aesthetic impact on them. In this context, gingival tissue regeneration could be achieved by tissue engineering (stem cells, scaffolds and growth factors). It has been demonstrated that blood clots originating from locally provoked bleedings is rich in mesenchymal stem cells (MSCs), but they need further stimuli to preserve viability and further differentiation. The laser parameters were 655nm, 100 mW, 2 J per point, MMO São Carlos-Brazil. Photobiomodulation Therapy (PBMT) has shown positive effects when applied in tissue engineering. PBMT improves survival, proliferation, migration and differentiation of stem cells of dentoalveolar origin.
The objective of this presentation is to demonstrate innovative uses of the new Er YAG laser, which are the removal of veneer (laminates), inlay and onlay. Treatments with Er YAG laser and its advantages in clinical treatments are well known and have been widely approached in literature. The studies by Morford et al were designed to systematically investigate the efficacy of Er:YAG laser on veneer debonding, possibly without damaging the underlying tooth and preserving veneer integrity. While the veneer materials did not show any characteristic water absorption bands in the FTIR, the bonding cement showed a broad H2O/OH absorption band. Veneers transmitted between 11.5% and 43.7% of the incident Er:YAG energy with Emax transmitting twice the energy as EE at comparable thicknesses. Laminates for removal have been is complicated in aesthetic odontology due to the complexity of the process with conventional high speed system. A major difficulty has been working time and eventual damage to dental structure. In addition, as lighter porcelain became available, a growing number of patients is requesting to replace their old facets. The laser used in these 3 clinical cases was Laser Lite Touch, MMO optics, Brazil, with the following parameters: Energy densidade/ Frequency 150mJ/40Hz to 200mJ/40Hz; Pulse Energy per pulse 6,00W /8,00W; AS7066 tip; Water level 5. Laminates removal was very fast, around 3,08 min perlaminate, with no damage to remaining tissue surface, no pain or sensitivity, no trauma as there was no vibration and comfort to the patient