A Hellerdent® Desens&Go™ To certain circumstances exposed dentin surface reacts to the irritative factors causing pain. The ends of the exposed surface of the enamel are opened up and the tooth is extremely sensitive. The solution is blocking up the pores.The main ingredient of Hellerdent® Desens&Go™ Desensitizing Pen is the revolutionary new biocompatible formula, oxalic acid. This material can adhere and bind the calcium. With this the calcium in the enamel can protect the surface of the tooth. As it binds the calcium, just 1 application of the clinically tested oxalic acid can reduce or eliminate the tooth sensitivity caused by gum recession, tooth whitening, hot or cold foods, sweet or sour foods and beverages. After cleaning your sensitive teeth, apply the liquid with a circular motion for 30 seconds and leave the sensitive teeth to dry for 1 minute and be careful not to let your lips, inner cheek, or tongue touch your teeth. To reach the optimal result, repeat the procedure 2, 3 times once immediately.