Primary incisor teeth may be spaced far enough apart that they do not require flossing. When adjacent teeth are touching, dental floss should be used to clean interproximal (in between) surfaces of teeth. Gentle pressure should be used during flossing to prevent injury to the gingival tissues as floss is guided between the teeth. Again, coaching, assistance, and completion of the task by the caretaker will be necessary. A flossing aid may provide the caregiver easier access to the posterior teeth. Flossing is important to prevent interproximal caries and gingivitis.