Currently, only 3M sells the special foam ridged design provided by the 1120 model. No matter how well you clean your canine's teeth or what chews you give your dog, as they age most will need a dental cleaning performed by the vet. Infections eat the immune system and cause illness. https://www.zalixaria.com/index.php/Save_On_Pet_Expenses:_5_Easy_Ways_Conserve_On_Pet_Ownership_Costs