@Mame,
I never did with my dogs and except for the current one, none had any teeth removed. Lilly dog had quite a few teeth removed a few month ago, but she's 15 years old. She has cataract and hearing loss too, it is what it is. Veterinarians are eager to take your money...
Lilly goes to the groomer every 6 weeks, that's needed, but twice a year teeth scaling - I don't think so! They're dogs after all, they chew on these sticks and hard kibbles, that should do it.
Don't get a poodle - they're high maintenance and prone to all kinds of diseases. You'll spend a lot of time at the veterinarian with them. Just get a mixed breed, they're much healthier.