Parents of a 9-year-old boy complain about permanently open mouth of the child. External examination revealed elongation of the lower face part, nonclosure of lips. Examination of the oral cavity revealed early mixed dentition. Relationship of the first permanent molars is neutral, vertical space is 5 mm. What is the most likely diagnosis?

Question

Answer options

Deep overbite
Distal occlusion
Open bite
Mesial occlusion
Cross bite

Correct answer

Open bite

Explanation

For open bite, there are typical complaints about permanently open mouth .External examination (typical facial signs) elongation of the lower face part, non-closure of lips. Examination of the oral cavity vertical space is 5 mm.

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