This article is a part of our Q&A series in which we give detailed answers to our readers' questions. Have a question? Don't hesitate and send it to us to get a detailed answer! There are many reasons why teeth can crack or break off. Some of the most common causes include: Trauma or injury to the mouth: A blow to the mouth or face can cause the teeth to crack or break off. Decay or cavities: Tooth decay can weaken the tooth and make it more susceptible to cracking or breaking. Grinding or clenching (bruxism): Grinding or clenching the teeth can put a lot of pressure on the teeth,…