You need to first visit
to get your x-ray
done for the area of concern. A proper diagnosis is a mirror for a proper prognosis.
Once the x-ray is taken, only then the dentist can guide you for a proper treatment plan whether the cavity can be treated with a simple aesthetic filling or root canal treatment
. Because as long as the cavity is asymptomatic the chances of root canal
are pretty less. But the cavity definitely needs to be attended with a proper sealant
in order to curb the further decay.