1. Nordbø JV, Straume-Næsheim TM, Hallan G, Fenstad AM, Sivertsen EA, Årøen A. Physical activity and the risk of aseptic loosening after total hip arthroplasty: a case-control study from the Norwegian Arthroplasty Register. BMC Musculoskelet Disord. 2025 Jul 4;26(1):639.
2. Khan M, Lygre SHL, Badawy M, Husby OS, Hallan G, Høl PJ, Gjertsen JE, Furnes O. Association of tourniquet use on short-term implant survival after primary total knee arthroplasty: a study of 24,249 knees from the Norwegian Arthroplasty Register. Acta Orthop. 2025 Jul 23;96:547-554.
3. Lutro O, Tjørhom MB, Leta TH, Gjertsen JE, Hallan G, Bruun T, Westberg M, Wik TS, Pollmann CT, Lygre SH, Furnes O, Engesæter L, Dale H. How many doses and what type of antibiotic should be used as systemic antibiotic prophylaxis in primary hip and knee arthroplasty? A register-based study on 301,204 primary total and hemi- hip and total knee arthroplasties in Norway 2005-2023. Acta Orthop. 2025 Mar 4;96:217-225.
4. Hole RM, Fenstad AM, Gjertsen JE, Hallan G, Furnes ON. Influence of design features and brand of reverse shoulder arthroplasties on survivorship and reasons for revision surgery: results of 5,494 arthroplasties with up to 15 years' follow-up reported to the Norwegian Arthroplasty Register 2007-2022. Acta Orthop. 2024 Aug 27;95:463-471.
5. Nordbø JV, Straume-Næsheim TM, Hallan G, Fenstad AM, Sivertsen EA, Årøen A. Patients with total hip arthroplasty were more physically active 9.6 years after surgery: a case-control study of 429 hip arthroplasty cases and 29,272 participants from a population-based health study. Acta Orthop. 2024 May 30;95:268-274.
6. Kirkeboe RL, Nordsletten L, Madsen JE, Dybvik E, Lie SA, Hallan G, Clarke-Jenssen J. Long-term follow-up and survival of delayed total hip arthroplasty following acetabular fracture: a matched cohort study of 552 cases from the Norwegian Arthroplasty Register. Hip Int. 2024 May;34(3):396-401.
7. Hole RM, Fenstad AM, Gjertsen JE, Hallan G, Furnes ON. The Delta III and Delta Xtend reverse shoulder arthroplasty-risk of revision and failure mechanisms: a report on 3650 cases from the Norwegian Arthroplasty Register 1994-2021. J Shoulder Elbow Surg. 2024 Mar;33(3):666-677.
8. Gjertsen JE, Nilsen D, Furnes O, Hallan G, Kroken G, Dybvik E, Fenstad AM.Promoting cemented fixation of the femoral stem in elderly female hip arthroplasty patients and elderly hip fracture patients: a retrospective cohort study from the Norwegian Arthroplasty Register and the Norwegian Hip Fracture Register. Acta Orthop. 2024 Feb 23;95:130-137.
9. Lutro O, Mo S, Tjørhom MB, Fenstad AM, Leta TH, Bruun T, Hallan G, Furnes O, Dale H. How good are surgeons at disclosing periprosthetic joint infection at the time of revision, based on pre- and intra-operative assessment? A study on 16,922 primary total hip arthroplasties reported to the Norwegian Arthroplasty Register. Acta Orthop. 2024 Jan 30;95:67-72.
10. Sundet M, Dybvik E, Furnes O, Eriksen ML, Hallan G. Poor survivorship of total ankle replacements. 1368 cases from the period 1994-2021 in the Norwegian arthroplasty register. Foot Ankle Surg. 2023 Dec;29(8):603-610.