Feed the meals as far apart as possible, maybe 8am Raw and 6pm Kibble, and see how that goes. Chances are she will be fine but they digest raw quicker than kibble which is why some dogs get upset stomachs when it's fed together.
If she gets an upset stomach, feed a bland diet for a day, the switch to one day full kibble and one day raw.
Leave a patty in the fridge the night before, plop it into her bowl, and afterwards wash the bowl with dish soap and warm water.
For teeth cleaning/breath benefits you can give her some beef ribs. There's not too much meat, and she can break down some of the bone and get a real workout. Once it's all chewed and sad looking, throw it away.
Let us know how it goes!