Oral Helse


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The Norwegian patient register (NPR) and Helfo


In a collaboration between the Department of Clinical Dentistry and the Department of Rheumatology at Haukeland University Hospital, a linkage between the Norwegian Patients Registry (NPR) and information on reimbursements from HELFO (The Norwegian Health Economics Administration) has been made. The utilization of the Norwegian reimbursement system for treatment of periodontitis has been investigated in Sjögren's syndrome, systemic lupus erythematosus, and rheumatoid arthritis. The project uses information on recurrent visits to the specialist health care system in Norway from more than 300.000 patients in the NPR database.


  1. Aga OO, Bolstad AI, Lie SA, Svanes Fevang BT. Periodontitis in patients with primary Sjögren's syndrome: A nation-wide register study. Eur J Oral Sci. 2023 Aug 31
  2. Bolstad AI, Fevang BS, Lie SA. Increased risk of periodontitis in patients with rheumatoid arthritis: A nationwide register study in Norway. J Clin Periodontol. 2023 Aug;50(8):1022-1032.
  3. Bolstad AI, Sehjpal P, Lie SA, Fevang BS. Periodontitis in patients with systemic lupus erythematosus: A nationwide study of 1,990 patients. J Periodontol. 2022 Mar;93(3):364-372.