[header] How to treat a broken tooth [title] Look for a sudden pain right after impact or chewing something hard. [step] If you crack your tooth severely enough, you'll probably feel significant pain right after the injury. If you experience this, examine the tooth that hurts and see if there is a piece missing. 
If so, you've indeed cracked a tooth. [substeps] Also keep in mind that you may still have a shard of tooth in your mouth.