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How many roots in upper and lower premolar?

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=>. Upper 1st premolars - 2 ROOTS. Upper 2nd premolars - Both 1 or 2 roots is possible. Lower 1st and 2nd premolars root is possible.

Premolar Root :-

CANINES and most premolars, except for MAXILLARY first premolars, usually have one root. Maxillary first premolars and MANDIBULAR molars usually have two roots.

Maxillary molars usually have three roots. The tooth is supported in BONE by an attachment apparatus, known as the periodontium, which interacts with the root.
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