1- Study the physical, mechanical and chemical properties as well as the tissue structure of the platypus used in some medical specialties (surgery, teeth and children). 2- Studying the histological structure of the doctors' lattice (surgery, teeth and children). 3- Detection of the microbial load of used doctors before and after washing. 4 - treatment of medical pallets with calcium silicate. 5- Measuring the microbial load of calcium silicate treated before, after use and after washing. The most important results: 1.     The results of the analysis of the samples were 55% of the samples. There is no infection and bacterial bacteria. 45% of the samples have bacterial bacteria. 28% of the samples have Staphylococcus, 9% of the samples have Escherichiacoli and 8% of the samples have pathogenic bacteria Others were candida, klebsiella 2.      After taking a swab of the infected doctors and analyzed by laboratory counting counting method, the results showed that the presence of staph bacteria in the sample was 1195 * 10 ⁵ cfu / 2cm ² and this ratio is large and pathogenic. 3.      After washing the traditional method in the washing machine at a temperature of 100 degrees Celsius was the result 60 cfu / 2cm2 and this ratio is very simple and not considered a nurse 4.     Washing the sample with calcium silicate and the sample was infected with staph. The result was 3.15 * 10 ⁴ in the sixth tissue, 1 * 10 ³ in the chilled tissue, that the chilled tissue retained more silicate residues and the proportion of bacterial pathogen less than the sixth after washing the treated tissue. 5.     After the analysis of the tissue we find that the treatment of calcium silicate does not have any significant effect on the apparent change in the characteristics of the fabric and this is a feature of the use of resistance to bacteria