EXPERIMENTAL RESEARCHES ON THE REPARATION OF DENTINO-PULPAL TISSUE OF TEETH EXPOSED TO CO2-LASER BEAM BY DOG AND MACACA MONKEY (MACACA-MULATTA AND MACACA-FASCICULARIS)

  • 1 January 1985
    • journal article
    • research article
    • Vol. 179  (5) , 577-585
Abstract
Traumatic inflammation due to application of CO2 laser radiation (.lambda. = 10.6 .mu.m) on the dentin and on pulp of 342 teeth of 8 dogs (Beagle) and of 6 monkeys (Macacas mulatta and M. fascicularis) stimulate in dentino-pulpal tissue morphological phenomenon, studied after 5 days, 1 and 3 months by microscopy and microradiography. The dentin exposed to a density of energy of: 2 .times. 103 J/cm2 shows a burn, a rarefaction and a cellular degeneration, followed by a neoformation of calcified dentin, of about 300 .mu.m thick in 3 months, due to the excitation of odontoblasts or produced by pulpal cells functioning before. A density of energy of 103 J/cm2 order applied to the pulp beads to its partial necrosis, to various inflammatory aspects (vascular, cellular, tissular) and to a quasi-constant regeneration of by a neo-dentin bridge of 200 .mu.m at 1 month. This method seems able to allow the analysis of cell activity (start, activation, blocking).

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