Orthodontics · single question
The lingual cusp on which mandibular posterior tooth is approximately 2/3 the height of the facial cusp?
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Correct answer: A. First premolar
The mandibular first premolar has a distinctively small lingual cusp u2014 approximately 2/3 the height of the buccal cusp u2014 and the crown tapers prominently toward the lingual aspect. All mandibular molars and second premolars have relatively balanced cusp heights.