Pulp vitality tests are used to differentiate between

periapical osseous dysplasia (periapical cemento-osseous dysplasia) and a periapical granuloma.

periapical osseous dysplasia (periapical cemento-osseous dysplasia) and an incisive canal cyst.

periapical granuloma and a periapical cyst.

periapical granuloma and a periapical abscess