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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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A child resorts to lip biting habit without primary involvement of mentalis muscle, the differential diagnosis is:
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The correct answer is  An important consideration is the necessity for making a differential diagnosis before attempting to break the lip habits. If there is class II div 1 malocclusion or an excessive overjet problem, the abnormal lip activity may be purely compensatory or adaptive to the dentoalveolar morphology. Abnormal lip activity is almost always associated with Class II div 1 malocclusion and open bite problems, and the elimination of the malocclusion usually restores normal muscle function.