Hardness Improvement of Teeth Filling Material (Amalgam) by Using He-Ne Laser 632.8nm and Diode Laser 675nm

Abstract

In this research we are studied the hardness of the amalgam teeth filling material by utilizing Brinell harness test apparatus. Several tests were carried out on different amalgam mixtures that were subjected to irradiation for the two minutes of both He-Ne lasers at wavelength 632.8 nm, 1 mW power, Omega laser with wavelength 675 nm, at a power 15 mW. The samples were left for different time intervals before hardness test were carried out. Some other samples were prepared for test without irradiation, and then they were tested for hardness at different intervals also. The samples were then compared to emphasize the effect of laser on the value of hardness. The results appeared the increases of observation in the hardness of the samples irradiated by two lasers rather than the samples without irradiation. ‫.‪laser 1 mW‬‬ ‫‪All of the samples irradiated by two lasers needed to 6 hours only‬‬ ‫‪to reach the value of hardness equally 30 hours for those samples‬‬ ‫.‪without irradiated‬‬ ‫‪‫‪The samples irradiated by Diode laser 15 mW appear the‬‬ ‫‪increasing of the hardness more than the samples irradiated by He-Ne‬‬ ‫.‪laser 1 mW‬‬ ‫‪All of the samples irradiated by two lasers needed to 6 hours only‬‬ ‫‪to reach the value of hardness equally 30 hours for those samples‬‬ ‫.‪without irradiated‬‬