Aim. Long-term follow-up studies of patients treated for temporomandibular disorders (TMD) pain are sparse in the literature. The aim of this study was to evaluate after 8 years the treatment outcome of patients with temporomandibular joint (TMJ) pain and/or myofascial pain. Materials and Methods. 120 patients were initially randomly assigned to two treatment modalities: an occlusal appliance or a control appliance. A questionnaire was sent to 118 eligible patients after 8 years. Ninety patients (76%) returned the questionnaire. Outcome measures were assessment of pain intensity, frequency of pain, physical and emotional functioning, overall improvement of pain and headache. Results. At follow-up the worst pain had decreased by 30% in 64 out of 90 patients. Also pain frequency decreased significantly. A better physical functioning was reported by a majority of all patients, 57/90. 50 out of 90 patients had a moderate to severe depression, while the value for non-specific physical symptoms was 61 patients out of 90. 68 patients (76%) reported overall improvement of their TMD pain. 61 patients felt that their headache had overall improved. As far as treatment modality, 57 patients had received another treatment in addition to the initial appliance, most often another occlusal appliance. Conclusion. Eight years after appliance therapy a majority of patients reported an improvement of their TMD pain and headache.