What is acquired pellicle?

Is a thin acellular organic film composed of proteins, glycoproteins, amino acids and peptides, it also contains lipids, and other macro-molecules. Formation of Aqired pellicle is the adherence of salivary proteins to the tooth surface. This occurs as soon as the saliva touches the tooth surface, and the thickness reaches 10-20nm in just a few minutes. The pellicle acts as a ‘double sided sticky tape’ as well as adhering to the tooth’s surface on the inside, it also allows bacteria to adhere on the outside of it.