In recent times, for successful resolution of space discrepancies, a plethora of interceptive measures involving nonextraction approaches have been employed judiciously. Immaculate diagnosis and treatment planning help to prevent failure in diagnosing a case of space discrepancy and space regaining. This article describes a case in which space loss in the posterior quadrant of mandibular arch was successfully regained by employing King Appliance space regainer in an adolescent male, following which successful eruption of unerupted tooth took place. Additionally, after 1 year of follow-up, no marked reduction in arch dimension was seen.