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Reaction of tissues of a tooth to laser radiation

hemodynamic Indicators (linear and volume rates) in a tooth pulp are the important diagnostic criteria of an estimation of a condition of a blood flow, allowing to define degree of hemodynamic disturbances in a tooth pulp (Arazalishvili L.D., 1987).

S.L.Shimshelavshvili (2005), has carried out research of influence of laser radiation on a tooth tissue. In the course of researches it has been noticed, that in a pulp of an intact teeth the hemodynamic condition differs depending on their group accessory. So, for example, rate of a blood flow in canines, premolar tooths and molar tooths above, than in incisors on 30 %, 13 % and 37 %, accordingly.
at caries of an enamel of change of a hemodynamic in a tooth pulp are bound as to intensifying of linear and volume rates of a blood flow (on 11-55 % and 16-55 %, accordingly), and their depression (on 11-40 % and 6-45 %, accordingly), that is caused by compensatory reaction of a hemodynamic in reply to damage. Pulsation and resistance indexes decreased on 10-45 % and raised on 12­ 19 %, accordingly. At dentine caries moderate change of hemodynamic indicators of a fabric blood flow prevails: Linear rates of a blood flow raise on 20-50 % and volume decrease on 30-70 %, accordingly, depending on depth of a carious cavity. At an initial pulpitis (a pulp hyperemia) changes of hemodynamic indicators of a blood flow in a pulp have the expressed character to what sharp rising of linear and volume rates which increase in 1,2-2,3 times and 1,3-1,7 times accordingly testified.

the Index of peripheric resistance (RI) at enamel and dentine caries increases on 7-30 % and amplifies in even larger degree at a pulpitis (30­ 80 %) that testifies to rising of peripheric resistance to a current of blood in process of diffusion of pathological process to tooth tissues. According to UZDG the pulsation index (PI) at enamel and dentine caries has value above norm (on 16-67 %). It testifies to conservation ­ kompensatornoprisposobitelnyh mechanisms of regulation of a blood flow in a pulp, and decreases at an initial both acute and chronic pulpitis (0,5 and 2 times accordingly), that specifies in depression is elastic-elasticheskih properties of a vascular wall of microvessels of a pulp.

S.L.Shimshelavshvili (2005) notices, that an exposition of laser radiation with regimens: frequency of 5 Hz, energy in impulse 28 mdzh during 5 with. On an enamel of a crown of an incisor of a rat causes a reactive hyperemia of vessels of a pulp and reversible changes in a layer of fibrilloblasts. The augmentation of time of influence to 10 with leads to focal  destruction of a pulp and activation of cells fibroblasticheskogo a number. In 15 days after influence the pulp condition is normalised as a result of neogenesis of a teeth constant prorezyvanija.

a Number of scientists (Verma S.K., et al., 2012) experimental and laboratory researches of the laser on firm tissues and a pulp of a teeth are carried out. According to some information at influence of laser radiation of low intensity on a dentine during caries treatment, appreciable depression of a hyperesthesia of a dentine in comparison with control groups by which treatment by different techniques was spent, but without laser influence on firm tissues (Yilmaz H.G is reached., Bayindir H., 2014).

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Scientific source KOVALEVA MARIA SERGEEVNA. Clinico-morphological research of a condition of tissues of a tooth at treatment of caries of a dentine with application of deep fluorination and nizkointensivnogo laser radiation. The dissertation on competition of a scientific degree of the candidate of medical sciences. Great Novgorod - & 2014. 2014

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