Study the Laser Bleaching for Several Human Teeth and Their Structural Properties as a Model of Therapy
Dhurgham M.Abd Ali AL- Haddad, Mithaq M. Mehdy Al- Sultani
In this study, the effect of teeth bleaching using infrared laser diode in the presence of a substance containing 35% hydrogen peroxide on the structural properties for teeth of different classes were studied. The x-ray diffraction measurements illustrate that the structure identical with hydroxide apatite (HAp) of hexagonal phase. No significant difference in the basic crystalline structure before and after treatment. Sample for a male of 24 years old appeared as the highest crystallized sample and increasing the age lead to a decrease in crystallization due to a decrease in the basic elements. Sample with highest magnesium ion (Mg+2) content has the lowest degree of crystallization, and the lowest crystalline size. Also Mg ion substitution in HAp reduced its lattice constant(c) and correspondingly an increase in the (a) constant. Comparing the FTIR spectra show that the PO43- bands differ in their intensities from one sample to another, where the weakest one for the sample which has the lowest phosphate content and larger Mg content, as indicated by the XRF examinations.