We first took Jack at about 2, but he's due for a checkup now so Tom will go for his first one at the same time (he's 15 months). I think anywhere between 1 and 2 is probably ok unless you notice problems earlier. The dentists can usually offer great advice about cleaning their teeth too (it can be tricky if they don't like it), so in some ways probably the earlier the better. GL with it.

OT, I hope your return to work goes well for you.