Why are crooked teeth a problem? Teeth that are misaligned and left untreated can lead to gum disease and create abnormal amounts of stress on the teeth and jaws.  This can all lead to premature wear on the teeth. There are three main types of misalignment: Crowding, spacing, and deep bite. Crowding: Leads to buildup of plaque and tarter, harbors harmful bacteria and you run the risk of tooth loss and bone loss Spacing: Food particles lodge between the teeth leading to sore and tender gums. This also leads to gum disease