This 10 year 2 months old boy had an upper midline diastema (gap); crowding of his teeth and a crossbite of the baby teeth on the left side. He was monitored only to ensure his dental development progressed OK. Crossbites of deciduous (baby) teeth often self-correct when they fall out and their adult successor teeth erupt. Crossbites of adult teeth generally do not self-correct and should be treated as early as possible (7 to 9 years of age).