The causes of crooked baby teeth include the following: 1. When both parents have crowded teeth or skewed teeth, it is likely that they will inherit them to their children, causing the baby’s newly erupted teeth to become crooked, etc. 2. When there is a difference in the width of the milk and permanent teeth, the gap between the milk teeth that have just fallen off cannot accommodate the permanent teeth, resulting in temporary crowding. 3. 4.When the root bone adhesion of the baby teeth occurs, the baby teeth will stay in the tooth row for a long time, which may cause the inherited permanent teeth to erupt in the wrong position and form the phenomenon of crookedness.