There is need for spreading dental awareness among the parents. I think you should tell in brief the growth phenomena of primary and permanent teeth. You should tell them that if i extract the tooth than as the permanent tooth is not yet showing so it would create a space for long time and may lead to space closure by adjacent teeth which in turn will lead to permanent tooth migration to abnormal oral areas....for more info children dentistry you can visit the link...http://www.identalhub.com/articlecategory-children-dentistry-33.aspx