TY - CHAP M1 - Book, Section TI - Silicosis A1 - Levin, Stephen A1 - Lilis, Ruth A2 - Wallace, Robert B. PY - 2017 T2 - Maxcy-Rosenau-Last Public Health and Preventive Medicine, 15e AB - Silicosis is a fibrotic lung disease produced by the inhalation of dust-containing free crystalline silicon dioxide (SiO2). Free silica and silicates represent a large part of the earth's crust. Silicon and oxygen are the two most important elements in the crust; about 27.7% of its composition is silicon, and 46.6% is oxygen. Free silica, the most widespread naturally occurring substance known to have a fibrogenic effect on the lungs, occurs in crystalline and amorphous forms. The crystalline forms that are fibrogenic are quartz, tridymite, and cristobalite; cryptocrystalline forms (consisting of minute crystals) are flint, chert, opal, and chalcedony. There are numerous forms of amorphous silica. SN - PB - McGraw-Hill Medical CY - New York, NY Y2 - 2024/03/29 UR - accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141969051 ER -