Dental pulp exposed to the CO2 laser beam

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Abstract
Traumatic inflammation due to application of CO2 laser beam on teeth (dentin and pulp) of Beagle dogs and Macaca Monkeys, stimulate in dentino-pulpal tissue morphological phenomena studied after 5 days, 1, and 3 months by microscopy and microradiography. After a dentin exposure to a density of energy from 2 × 103 J/cm2, the first cell layers of the pulp tissue show a rarefaction and a cellular degeneration, followed by a neoformation of cacified dentin, of about 300 μm thick in 3 months, due to the excitation of odontoblasts or produced by pulpal cells functioning before. A density of energy of 103J/cm2 order applied to the pulp beads to its partial necrosis, to various inflammatory aspects and to a quasi-constant regeneration by a neo-dentin bridge of 200 μm at 1 month. The analysis of cell activity seems able to be investigated from this method.