I have a dog that likes to eat wood.. how do I stop this?

This is not just any wood, it is the teak wood of just a few chairs included in my outdoor patio furniture. I am very fond of the furniture, and it was here before the dog. We rescued the dog, brought her home, gave her toys and bones, and still, she eats the arm of the chair. I am getting that it is either a nervous thing, an attention thing, maybe a comfort thing.. but how do I make it stop?