Welcome to Yorkie Talk.
I believe it is a myth that dry food causes less dental disease than wet foods. Brushing is best to keep the teeth clean. For dental chews, I have started using CET chews that I buy at my vet's office. The chews have made a remarkable difference. If you choose to use them, please supervise your pup closely. A couple of members here had pups who had near-fatal choking episodes with them. I buy the medium size and I hold them while my boys chew.