My vet also says the dry food = clean teeth is a myth. He says if that were the case, then why then do all the cats that he sees that eat only dry have the worst teeth. My 10 year old cat recently had a check up and she eats only wet food.....she gets a tiny bit of kibble, but it is used as a treat, not a meal, and her teeth were in very good shape, and her blood work was perfect, and her coat is like velvet. He said he wanted to use my cat as an example to others as to why an all wet food diet is better for cats. She actually did eat dry for the first few years of her life, and she was addicted to it. Then my male cat developed crystals, had urinary blockage and almost diet. I had to put him on all wet and decided she needed all wet too....and she was NOT happy about it. It took a while to get her to eat wet, but I did it. Btw, she used to gulp water all the time, and I thought it was a good thing before I learned that she was gulping water because the dry food is so high in sodium that it makes them so thirsty. Now, all 3 of my cats are on all wet, and I barely see any of them even drink water, but I add water to their wet food, and they all pee like crazy, and my male that had the crystals has not had any more problems with UTI's since I changed him, 5 years ago.
Some people think we are all crazy, those of us that believe that all wet food is better, but if you have ever had a cat that has suffered from health issues like crystals, blockage, kidney failure, you eventually figure out it's not worth it to take a chance at all dry food. Also, when I look at my own family members and friends whose cats have died of kidney failure, like my mom's cat, at 8, and a good friend, whose cat died of it at 10, and now another family member whose cat just died in Feb, she had cancer, blood clots, and a whole lot of things wrong, and I suspect her kidneys were failing also, but they never took her to the vet, but she was on 9 lives dry food her whole life.
I spend a small fortune on cat food, I have 3 cats, they all eat wet, and it is all high quality stuff. Plus, I have a large dog that eats high quality canned food also. It is not easy to provide this food to my pets, but I adore them and am committed to feeding them the best that I can, just like with my kids.