Difference between mandibular 1st and 2nd premolar
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the lingual cusp of the mandibular 1st is smaller and nonfunctional
-mandibular 2nd premolar lingual cusps function and are relatively longer
-mesial root surfaces of mand. 2nd premolars are the only premolar root surface not likely to have a mid-root depression.
-mandibular 2nd premolar lingual cusps function and are relatively longer
-mesial root surfaces of mand. 2nd premolars are the only premolar root surface not likely to have a mid-root depression.
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