Any honest dentist will tell you that it is always preferable to keep natural teeth. Preserving natural teeth lets you eat better, taste better, and let’s face it, saves a lot of money.
Some less-than-honest dentists, on the other hand, might try to convince you to remove otherwise healthy teeth. Extractions and full mouth reconstructions are much higher-ticket items for a dentist than crowns, bridges or veneers. But if you don’t need it, then you’re doing irreparable damage to your mouth for something you could have avoided.
That’s not to say any dentist recommending extracting teeth is trying to fool you. Some teeth will be too damaged, decayed or diseased to be saved. But be wary of anyone who seems overly keen to start pulling teeth and starting over.