A clinical case is presented showing a non-syndromic child born with a severely retruded mandible and deep bite. An early intervention permitted improvement of the sagittal and vertical relationships between both maxillaries before the patient enters into the mixed dentition. This clinical case supports the idea that developing malocclusions in children should be intercepted as early as possible in order to reduce the risk of more complicated treatments in the future, as well as preventing other problems that can associate with a deviated or diminished craniofacial growth and development.