TMD treatment, based on state of the art knowledge derived from clinical studies will be applied in patients with tinnitus and TMD. When this approach proves to be useful for the treatment of tinnitus, it offers a new therapeutic option for patients with tinnitus. To understand how TMD treatment works for patients with tinnitus, we will analyse mediating factors, i.e. factors that contribute to the therapeutic effect. To help clinicians in their clinical process we will identify prognostic indicators, i.e. factors that predict a positive or negative outcome of TMD treatment. This can provide a helpful tool in clinical practice.