title: Dental pulp exposed to the CO2 laser beam.
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 X 10(3) J/cm2, the first cell layers of the pulp tissue show a rarefaction and a cellular degeneration, followed by a neoformation of calcified dentin, of about 300 microns thick in 3 months, due to the excitation of odontoblasts or produced by pulpal cells functioning before. A density of energy of 10(3) J/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 microns at 1 month. The analysis of cell activity seems able to be investigated from this method.
authors: Faculté de Chirurgie-Dentaire, Université Paris-V, Montrouge, France.
authors: J
authors: J
authors: Melcer
authors: M T
authors: MT
authors: Chaumette
authors: F
authors: F
authors: Melcer
mesh_terms: D000818:Animals; D003737:Dental Cavity Preparation; D003782:Dental Pulp / Q000293:injuries* / Q000473:pathology; D003784:Dental Pulp Calcification / Q000209:etiology / Q000473:pathology; D003804:Dentin / Q000293:injuries / Q000473:pathology; D004285:Dogs; D007834:Lasers / Q000009:adverse effects*; D008252:Macaca fascicularis