Primary incisor teeth may be spaced far enough apart that they do not require flossing. When adjacent teeth are touching, dental floss may be used to clean interproximal (in between) surfaces of teeth not effectively cleaned by brushing. Gentle pressure should be used during flossing to prevent injury to the gingival tissues as floss is guided between the teeth. Completion of the task by the caregiver is necessary. A flossing aid may provide the caregiver easier access to the posterior teeth.