name of a pharmaceutical drug used in dentistry that has Ionic bonding? and how this bounding is made?
The fluorocarbons that you mentioned do have polarized $\ce{C-F}$ bonds, but no ionic bonds. If you think ionic, think salts.

I'm not a pharmacologist, but what about the local anestethics used at the dentist? Lidocaine (1), mepivacaine (2), and articaine (3) are frequently used. 



All these compounds have tertiary and secondary amino groups. (I've marked the relevant nitrogen atoms blue). When these compounds are treated with hydrogen chloride, the amines get protonated and the neutral compounds are converted to ionic hydrochlorides, $\ce{R3N -&gt;[\textrm{HCl}] R3NH+ Cl-}$.