Introduction: The habit of mouth breathing can affect the growth and development of dentofacial complex of child. The adverse effects are greatest during the period of growth. Clinical Findings: This case report focuses on the use of oral screen on a patient with mouth breathing and maxillary anterior proclination with incompetent lips. Outcome: The oral screen reduced the proclination and lips became competent within 5 months of usage. Conclusion: Oral screen proves to be a simple technique for interception of worsening of the effects due to habits.