My son is 22 months and only has 6 teeth at this point. 2 top, 2 bottom, and 2 one year molars (luckily on the same side). That's it. And it doesn't look like he's getting anymore anytime soon.
Basically there is nothing you can do except stop worrying about teeth. My son definitely has a unique smile, but he can literally eat everything (including things like pretzels since he's got those two molars...) and it does not impede him at all. I give him whole sandwiches and he devours them. I give him all kinds of meat that I wouldn't think he could chew, but he does. It's amazing. Kids adapt. Don't worry.
We haven't taken him to the dentist yet (probably pretty soon), but if they do x-rays and decide that he just doesn't have any more baby teeth....well....there's not much we can do about that either. Although, I do hope he does have all his teeth. Keep your fingers crossed.