I had the same problem and I was looking in A german forum and they said to get Hekla Lava which I did and it did the job for me. I read in thier forum that it is A infection in the jaw bone and I thought that was strange. Now Hekla Lava is the German name and you will have to research or translate the name into English. I wish the best of luck and hier is the exact name Hekla Lava D6.