Non edible chew products such as Nylabone are made with or a mixture of nylon, plastic and rubber. When a dog starts to chew a Nylabone for instance, the teeth get cleaned by the tiny raised projections that form on the surface of the chew toy. Sometimes these tiny pieces come off the chew toys but are so small they easily pass through the digestive system. Nylabone make a large range of teeth cleaning products which you can find on this store.
It is important to find your dogs chewing style and so select its chew type. A dogs jaw is extremely powerful and the pressure exerted can put a heavy stress load on their teeth. It is good to start with a non edible chew that is large enough to to encourage your dog to chew from the sides rather than the top and bottom, this also helps to clean the teeth more efficiently.