Distalization of maxillary molars helps to gain space which can be utilized to correct mild to moderate problems in the maxillary arch. It is done to push the maxillary and/or mandibular terminal molars posteriorly. This increases the arch length by the same length as the amount of distalization achieved. Distalization is usually undertaken before the eruption of the second permanent molars. Non-extraction treatment of Class II malocclusion frequently requires upper molar distalization into a final Class I relationship.