An old Colgate commercial promising an end to ‘unpleasant breath’, and featuring a very trustworthy-looking dentist.

General Dentistry
My Tooth has Cracked! Ouch!
Cracked tooth syndrome (CTS) is like a greenstick fracture where a tooth has incompletely cracked, but no part of the tooth is completely broken yet and can be notoriously difficult to diagnose clinically.