Table 1: Differential diagnosis between pulpal and periodontal pain.

Acute Irreversible Pulpitis Periodontal Abscess
Pain is not always localized Pain is localized
Acute pain: piercing, throbbing and intermittent Dull continuous pain. Uniform
Pain sensitive to changes in temperature Pain not altered by changes in temperature
Painful to percussion Not painful to percussion
Altered vitality tests Normal vitality tests

Main features indicating final diagnosis of acute irreversible pulpitis and periodontal abscess.

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