Academic article

• Andrea Toft Boutera; Eva Hansen Dybvik; Geir Hallan et al. (2025). Weekend discharge after hip fracture surgery is associated with increased 30-day mortality. A retrospective observational study of 35,138 hip fractures reported to the Norwegian Hip Fracture Register. (external link)
• Tesfaye Hordofa Leta; Richard N. Chang; Stein Atle Lie et al. (2025). Antibiotic-Loaded Bone Cement and Risk of Infection After Knee Arthroplasty in High-Risk Patients. (external link)
• Håkon Greve  Johannessen; Geir Hallan; Thomas Istvan Edelsvärd Kadar et al. (2025). Early cup migration and wear as predictors for later aseptic loosening: a secondary evaluation of a randomized controlled RSA trial on cemented hip arthroplasties with 18-year follow-up. (external link)
• Jakob Vangen Nordbø; Truls Martin Straume-Næsheim; Geir Hallan et al. (2025). Physical activity and the risk of aseptic loosening after total hip arthroplasty: a case–control study from the Norwegian Arthroplasty Register. (external link)
• Sjur Børsheim; Torbjørn Kristensen; Geir Hallan et al. (2025). Periprosthetic femoral fracture following hip arthroplasty : which component design and fixation method has the lowest risk of reoperation?. (external link)
• Jonathan M R. French; Kevin Deere; Michael R. Whitehouse et al. (2024). The completeness of national hip and knee replacement registers. (external link)
• Håvard Dale; Anne Marie Fenstad; Geir Hallan et al. (2012). Increasing risk of prosthetic joint infection after total hip arthroplasty 2,778 revisions due to infection after 432,168 primary THAs in the Nordic Arthroplasty Register Association (NARA). (external link)
• Sven Young; Stein Atle Lie; Geir Hallan et al. (2011). Low infection rates after 34,361 intramedullary nail operations in 55 low- and middle-income countries Validation of the Surgical Implant Generation Network (SIGN) Online Surgical Database. (external link)
• Susann Grosse; Hans Kristian Haugland; Peer Kåre Lilleng et al. (2015). Wear particles and ions from cemented and uncemented titanium-based hip prostheses - A histological and chemical analysis of retrieval material. (external link)
• Einar Lindalen; Leif Ivar Havelin; Lars Nordsletten et al. (2011). Is reverse hybrid hip replacement the solution? 3,963 primary hip replacements with cemented cup and uncemented stem, from the Norwegian Arthroplasty Register. (external link)
• Tesfaye Hordofa Leta; Anne Marie Fenstad; Stein Håkon Låstad Lygre et al. (2023). The use of antibiotic-loaded bone cement and systemic antibiotic prophylactic use in 2,971,357 primary total knee arthroplasties from 2010 to 2020: an international register-based observational study among countries in Africa, Europe, North America, and Oceania. (external link)
• Randi Margrete Hole; Anne Marie Fenstad; Jan-Erik Gjertsen et al. (2024). 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. (external link)
• Jeppe V. Rasmussen; Stig Brorson; Geir Halland et al. (2016). Is it feasible to merge data from national shoulder registries? A new collaboration within the Nordic Arthroplasty Register Association. (external link)
• Mads Sundet; Karen Sandvik Gyllensten; Eva Hansen Dybvik et al. (2024). Five-Year Results of the Salto XT Revision Ankle Arthroplasty. (external link)
• Geir Hallan; Stein Atle Lie; Leif Ivar Havelin (2006). High wear rates and extensive osteolysis in 3 types of uncemented total hip arthroplasty - A review of the PCA, the Harris Galante and the profile/tri-lock plus arthroplasties with a minimum of 12 years median follow-up in 96 hips. (external link)
• Paul Johan Høl; Geir Hallan; Ove Nord Furnes et al. (2022). Similarly low-blood metal ion levels at 10-years follow-up of total hip arthroplasties with Oxinium, CoCrMo, and stainless steel femoral heads. Data from a randomized clinical trial. (external link)
• Karola Pawloy; Anne Marie Fenstad; Tesfaye Hordofa Leta et al. (2023). No difference in risk of revision due to infection between clindamycin and cephalosporins as antibiotic prophylaxis in cemented primary total knee replacements: a report from the Norwegian Arthroplasty Register 2005–2020. (external link)
• Geir Hallan; Ove Furnes; Stein Atle Lie et al. (2007). Medium and long-term performance of 11 516 uncemented primary femoral stems from the Norwegian arthroplasty register.. (external link)
• Scott J. Macinnes; Konstantinos Hatzikotoulas; Anne Marie Fenstad et al. (2019). The 2018 Otto Aufranc Award: How does genome-wide variation affect osteolysis risk after THA?. (external link)
• Håkon Langvatn; Christoffer Bartz-Johannessen; Johannes Cornelis Schrama et al. (2019). Operating room ventilation-Validation of reported data on 108 067 primary total hip arthroplasties in the Norwegian Arthroplasty Register. (external link)
• Stein Atle Lie; Geir Hallan; Lars B. Engesæter et al. (2007). Liner replacement at revision surgery for uncemented primary acetabular cups.. (external link)
• Olav Lutro; Synnøve Mo; Marianne Bollestad et al. (2024). 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. (external link)
• Linda Chokotho; Brian C. Lau; Devin Conway et al. (2019). Validation of chichewa short musculoskeletal function assessment (SMFA) questionnaire: A cross-sectional study. (external link)
• Stergios Lazarinis; Keijo T. Mäkelä; Antti Eskelinen et al. (2017). Does hydroxyapatite coating of uncemented cups improve long-term survival? An analysis of 28,605 primary total hip arthroplasty procedures from the Nordic Arthroplasty Register Association (NARA). (external link)
• Ove Nord Furnes; Jan-Erik Gjertsen; Eivind Inderhaug et al. (2023). I starten var det Hofteregisteret- så ble vi flere. Nasjonalt Register for Leddproteser, Nasjonalt Hoftebruddregister, Nasjonalt Korsbåndregister og Nasjonalt Barnehofteregister. (external link)
• Yngvar Krukhaug; Geir Halland; Eva Hansen Dybvik et al. (2018). A survivorship study of 838 total elbow replacements: a report from the Norwegian Arthroplasty Register 1994-2016. (external link)
• Geir Hallan; Eva Dybvik; Ove Furnes et al. (2010). Metal-backed acetabular components with conventional polyethylene A REVIEW OF 9113 PRIMARY COMPONENTS WITH A FOLLOW-UP OF 20 YEARS. (external link)
• Tesfaye Hordofa Leta; Richard N. Chang; Anne Marie Fenstad et al. (2024). Number of Doses of Systemic Antibiotic Prophylaxis May Be Reduced in Cemented Primary Knee Arthroplasty Irrespective of Use of Antibiotic in the Cement: A Multiregistry-Based Meta-Analysis. (external link)
• Benedikt Arni Jonsson; Thomas Kadar; Leif Ivar Havelin et al. (2015). Oxinium modular femoral heads do not reduce polyethylene wear in cemented total hip arthroplasty at five years: A randomised trial of 120 hips using radiostereometric analysis. (external link)
• Øystein Johannes Gøthesen; Birgitte Espehaug; Leif Ivar Havelin et al. (2014). Functional outcome and alignment in computer-assisted and conventionally operated total knee replacements: a multicentre parallel-group randomised controlled trial. (external link)
• Sven Young; Stein Atle Lie; Geir Hallan et al. (2013). Risk factors for infection after 46,113 intramedullary nail operations in low- and middle-income countries. (external link)
• Andrea Boutera; Eva Hansen Dybvik; Geir Hallan et al. (2019). Is there a weekend effect after hip fracture surgery? A study of 74,410 hip fractures reported to the Norwegian Hip Fracture Register. (external link)
• Aarid Liland Olsen; Liv Heide Magnussen; Liv Karin Helvik Skjærven et al. (2021). Basic Body Awareness Therapy versus standard care in hip osteoarthritis. A randomized controlled trial. (external link)
• Michelle Khan; Jan-Erik Gjertsen; Anne Marie Fenstad et al. (2023). Cementing techniques for total ktnee arthroplasty in Norwegian hospitals; a questionnaire-based study. (external link)
• K. Mäkelä; Ove Furnes; Geir Hallan et al. (2019). The benefits of collaboration: the Nordic Arthroplasty register association.. (external link)
• Claus Varnum; Alma Bečić Pedersen; Ola Rolfson et al. (2019). Impact of hip arthroplasty registers on orthopaedic practice and perspectives for the future. (external link)
• Scott J Macinnes; K Hatzikotoulas; Anne Marie Fenstad et al. (2019). Erratum to: The 2018 Otto Aufranc Award: How does genome-wide variation affect osteolysis risk after THA?. (external link)
• Håvard Dale; Sjur Børsheim; Torbjørn Kristensen et al. (2019). Fixation, sex and age: highest risk of revision for uncemented stems in elderly women- data from 66,995 primary total hip arthroplasties in the Norwegian arthroplasty register.. (external link)
• Ammar Jobory; Johan Kärrholm; Søren Overgaard et al. (2019). Reduced revision risk for dual-mobility cup in total hip replacement due to hip fracture: A matched-pair analysis of 9,040 cdases from the Nordic Arthroplasty Register Association (NARA). (external link)
• Peter Ellison; Geir Hallan; Paul Johan Høl et al. (2012). Coordinating retrieval and register studies improves postmarket surveillance. (external link)
• Johannes Cornelis Schrama; Anne Marie Fenstad; Håvard Dale et al. (2015). Increased risk of revision for infection in rheumatoid arthritis patients with total hip replacements. (external link)
• Randi Margrete Hole; Anne Marie Fenstad; Jan-Erik Gjertsen et al. (2023). 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. (external link)
• Lars B. Engesæter; Håvard Dale; Johannes Cornelis Schrama et al. (2011). Surgical procedures in the treatment of 784 infected THAs reported to the Norwegian Arthroplasty Register Best survival with 2-stage exchange revision, but also good results with debridement and retention of the fixed implant. (external link)
• Thomas Kadar; Ove Furnes; Arild Aamodt et al. (2012). The influence of acetabular inclination angle on the penetration of polyethylene and migration of the acetabular component: A prospective, radiostereometric study on cemented acetabular components. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
• Johannes Cornelis Schrama; Birgitte Espehaug; Geir Hallan et al. (2010). Risk of Revision for Infection in Primary Total Hip and Knee Arthroplasty in Patients With Rheumatoid Arthritis Compared With Osteoarthritis: A Prospective, Population-Based Study on 108,786 Hip and Knee Joint Arthroplasties From the Norwegian Arthroplasty Register. (external link)
• Håvard Dale; Anne Marie Fenstad; Geir Hallan et al. (2023). Increasing risk of revision due to infection after primary total hip arthroplasty: results from the Nordic Arthroplasty Register Association. (external link)
• Linda Chokotho; Claire A Donnelley; Sven Young et al. (2021). Cost utility analysis of intramedullary nailing and skeletal traction treatment for patients with femoral shaft fractures in Malawi. (external link)
• Ragnhild Loven Kirkebø; Lars Nordsletten; Jan Erik Madsen et al. (2023). 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. (external link)
• Vera Baasland Halvorsen; Anne Marie Fenstad; Stephan Maximillian Röhrl et al. (2020). Hoftelidelser hos barn og unge- utredning og behandling av senfølger.. (external link)
• Rasmus Kreipke; Cecilia Rogmark; Alma B. Pedersen et al. (2019). Dual Mobility Cups: Effect on Risk of Revision of Primary Total Hip Arthroplasty Due to Osteoarthritis: A Matched Population-Based Study Using the Nordic Arthroplasty Register Association Database. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Arne Kr Skredderstuen et al. (2016). Outcomes of unicompartmental knee arthroplasty after aseptic revision to total knee arthroplasty: a comparative study of 768 TKAs and 578 UKAs revised to TKAs from the norwegian arthroplasty register (1994 to 2011). (external link)
• Gunnar Petursson; Anne Marie Fenstad; Øystein Gøthesen et al. (2018). Computer-assisted compared with conventional total knee replacement: A Multicenter Parallel-Group Randomized Controlled Trial. (external link)
• Justas Zalieckas; Ivan Rios Mondragon; Paulius Pobedinskas et al. (2022). Polycrystalline diamond coating on orthopedic implants: Realization and role of surface topology and chemistry in adsorption of proteins and cell proliferation. (external link)
• Håvard Dale; Pål Høvding; Sindre Myklatun Tveit et al. (2020). Increasing but levelling out risk of revision due to infection after total hip arthroplasty: a study on 108,854 primary THAs in the Norwegian Arthroplasty Register from 2005 to 2019. (external link)
• Susann Wolf; Anne Christine Johannessen; Peter Ellison et al. (2022). Inflammatory tissue reactions around aseptically loose cemented hip prostheses: A retrieval study of the Spectron EF stem with Reflection All‐Poly acetabular cup. (external link)
• Silje Marie Melbye; Sofie Cecilia Dietrich Haug; Anne Marie Fenstad et al. (2021). How Does Implant Survivorship Vary with Different Corail Femoral Stem Variants? Results of 51,212 Cases with Up to 30 Years Of Follow-up from the Norwegian Arthroplasty Register. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Arne Kr Skredderstuen et al. (2015). Failure of aseptic revision total knee arthroplasties: 145 Revision failures from the Norwegian Arthroplasty Register, 1994-2011. (external link)
• Leonard Banza Ngoie; Jared Gallaher; Eva Hansen Dybvik et al. (2018). The rise in road traffic injuries in Lilongwe, Malawi: A snapshot of the growing epidemic of trauma in low income countries. (external link)
• G Tsikandylakis; Johan Kärrholm; Nils P. Hailer et al. (2018). No increase in survival for 36-mm versus 32-mm femoral heads in metal-on-polyethylene THA: A registry study.. (external link)
• Heinrich Brüggemann; Ingvild Dalen; Lena Kristin Bache-Mathiesen et al. (2022). Incidence and risk factors of intraoperative periprosthetic femoral fractures during primary total hip arthroplasty: 218,423 cases reported to the Norwegian Arthroplasty Register between 1987 and 2020. (external link)
• Liza N. Van Steenbergen; Keijo Mäkelä; Johan Kärrholm et al. (2020). Total hip arthroplasties in the Dutch Arthroplasty Register (LROI) and the Nordic Arthroplasty Register Association (NARA): comparison of patient and procedure characteristics in 475,685 cases. (external link)
• Christian Thomas Pollmann; Jan-Erik Gjertsen; Håvard Dale et al. (2020). Operative approach influences functional outcome after DAIR for infected total hip arthroplasty. (external link)
• Nils P. Hailer; Stergios Lazarinis; Keijo T. Mäkelä et al. (2015). Hydroxyapatite coating does not improve uncemented stem survival after total hip arthroplasty!: An analysis of 116,069 THAs in the Nordic Arthroplasty Register Association (NARA) database. (external link)
• Helge Wangen; Leif Ivar Havelin; Anne Marie Fenstad et al. (2017). Reverse hybrid total hip arthroplasty: Results from the Nordic Arthroplasty Register Association (NARA). (external link)
• Geir Hallan; Birgitte Espehaug; Ove Furnes et al. (2012). Is there still a place for the cemented titanium femoral stem? 10,108 cases from the Norwegian Arthroplasty Register. (external link)
• Geir Hallan; Anne Marie Fenstad; Ove Furnes (2020). What is the frequency of fracture of ceramic components in THA? Results from the Norwegian arthroplasty register from 1997 to 2017. (external link)
• Øystein Gøthesen; Birgitte Espehaug; Leif Ivar Havelin et al. (2013). Survival rates and causes of revision in cemented primary total knee replacement: A report from the Norwegian Arthroplasty Register 1994-2009. (external link)
• Håvard Dale; Sjur Børsheim; Torbjørn Kristensen et al. (2019). Perioperative, short, and long-term mortality related to fixation in primary total hip arthroplasty: a study of 79,557 patients in the Norwegian Arthroplasty Register. (external link)
• Øystein Skåden; Ove Nord Furnes; Stein Håkon Låstad Lygre et al. (2025). Radiostereometric measurement of implant migration in robotically assisted vs conventional bi-cruciate stabilized cemented total knee arthroplasty: secondary analysis of a randomized controlled trial. (external link)
• G Tsikandylakis; Johan Kärrholm; Geir Hallan et al. (2020). Is there a reduction in risk of revision when 36-mm heads instead of 32-mm are used in total hip arthroplasty for patients with proximal femur fractures?. (external link)
• Linda Chokotho; Hao-Hua Wu; David Shearer et al. (2020). Outcome at 1 year in patients with femoral shaft fractures treated with intramedullary nailing or skeletal traction in a low-income country: a prospective observational study of 187 patients in Malawi. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). Wear and migration of highly cross-linked and conventional cemented polyethylene cups with cobalt chrome or Oxinium femoral heads: A randomized radiostereometric study of 150 patients. (external link)
• Tesfaye Hordofa Leta; Stein Atle Lie; Anne Marie Fenstad et al. (2024). Periprosthetic Joint Infection After Total Knee Arthroplasty With or Without Antibiotic Bone Cement. (external link)
• Håvard Dale; Geir Hallan; Birgitte Espehaug et al. (2009). Increasing risk of revision due to deep infection after hip arthroplasty A study on 97,344 primary total hip replacements in the Norwegian Arthroplasty Register from 1987 to 2007. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Johannes Cornelis Schrama et al. (2019). Outcome of revision surgery for infection after total knee arthroplasty: Results of 3 surgical strategies. (external link)
• Kirill Gromov; Anders Troelsen; Maziar Modaddes et al. (2019). Varying but reduced use of postoperative mobilization restrictions after primary total hip arthroplasty in Nordic countries: a questionnaire-based study. (external link)
• Stein Atle Lie; Anne Marie Fenstad; Stein Håkon Låstad Lygre et al. (2022). Kaplan-Meier and Cox Regression Are Preferable for the Analysis of Time to Revision of Joint Arthroplasty: Thirty-One Years of Follow-up for Cemented and Uncemented THAs Inserted from 1987 to 2000 in the Norwegian Arthroplasty Register. (external link)
• Linda Chokotho; Nyengo Mkandawire; Devin Conway et al. (2017). Validation and reliability of the Chichewa translation of the EQ-5D quality of life questionnaire in adults with orthopaedic injuries in Malawi. (external link)
• Peder Svenkerud Thoen; Stein Håkon Låstad Lygre; Lars Nordsletten et al. (2022). Risk factors for revision surgery due to dislocation within 1 year after 111,711 primary total hip arthroplasties from 2005 to 2019: a study from the Norwegian Arthroplasty Register. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Arne Kr Skredderstuen et al. (2015). Secondary patella resurfacing in painful non-resurfaced total knee arthroplasties: A study of survival and clinical outcome from the Norwegian Arthroplasty Register (1994–2011). (external link)
• Mads Sundet; Eva Hansen Dybvik; Ove Nord Furnes et al. (2023). Poor survivorship of total ankle replacements. 1368 cases from the period 1994–2021 in the Norwegian arthroplasty register. (external link)
• Oskari Pakarinen; Ville Ponkilainen; Claus Varnum et al. (2024). Choice of Bearings Influences the Implant Survival of Total Hip Arthroplasty in Patients Who Have Osteoarthritis Aged 55 Years or More: Results of 158,044 Patients From the Nordic Arthroplasty Register Association From 2005 to 2017. (external link)
• Håkon Langvatn; Johannes Cornelis Schrama; Guangyu Cao et al. (2020). Operating room ventilation and the risk of revision due to infection after total hip arthroplasty: assessment of validated data in the Norwegian Arthroplasty Register. (external link)
• Stein Atle Lie; Geir Hallan; Ove Furnes et al. (2007). Isolated acetabular liner exchange compared With Complete acetabular Component revision in revision of primary uncemented acetabular components: a study of 1649 revisions from the Norwegian arthroplasty register.. (external link)
• Olav Lutro; Håkon Langvatn; Håvard Dale et al. (2014). Increasing Resistance of Coagulase-Negative Staphylococci in Total Hip Arthroplasty Infections: 278 THA-Revisions due to Infection Reported to the Norwegian Arthroplasty Register from 1993 to 2007.. (external link)
• Jakob Vangen Nordbø; Truls Martin Straume-Næsheim; Geir Hallan et al. (2024). 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. (external link)
• Gunnar Petursson; Anne Marie Fenstad; Øystein Gøthesen et al. (2016). Similar migration in computer-assisted and conventional total knee arthroplasty: A multicenter, parallel-group, randomized controlled trial involving 54 patients. (external link)
• Ines Kutzner; Geir Halland; Paul Johan Høl et al. (2017). Early aseptic loosening of a mobile-bearing total knee replacement: A case-control study with retrieval analyses. (external link)
• Mikko S. Venäläinen; Valtteri J. Panula; Antti P. Eskelinen et al. (2024). Prediction of Early Adverse Events After THA: A Comparison of Different Machine-Learning Strategies Based on 262,356 Observations From the Nordic Arthroplasty Register Association (NARA) Dataset. (external link)
• Geir Hallan; Arild Aamodt; Ove Furnes et al. (2006). Palamed G compared with Palacos R with gentamicin in Charnley total hip replacement. (external link)
• Håkon Langvatn; Olav Lutro; Håvard Dale et al. (2015). Bacterial and hematological findings in infected total hip arthroplasties in Norway. Assessment of 278 revisions due to infection in the Norwegian Arthroplasty Register. (external link)
• Michelle Khan; Stein Håkon Låstad Lygre; Mona Badawy et al. (2025). 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. (external link)
• Paul Johan Høl; Geir Hallan; Kari Indrekvam (2021). Metallionenivåer i blod fra pasienter med metall-mot-metall-hofteprotese. (external link)
• Leonard Banza Ngoie; Eva Hansen Dybvik; Geir Hallan et al. (2022). The unmet need for treatment of children with musculoskeletal impairment in Malawi. (external link)
• Leonard Banza Ngoie; Eva Hansen Dybvik; Geir Hallan et al. (2021). Prevalence, causes and impact of musculoskeletal impairment in Malawi: A national cluster randomized survey. (external link)
• Sven Young; Leonard Banza; Geir Hallan et al. (2013). Complications after intramedullary nailing of femoral fractures in a low-income country : A prospective study of follow-up, HIV infection, and microbial infection rates after IM nailing of 141 femoral fractures at a central hospital in Malawi. (external link)
• Olav Lutro; Marianne Bollestad; Tesfaye Hordofa Leta et al. (2025). 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. (external link)
• Thomas Kadar; Eva Dybvik; Geir Hallan et al. (2012). Head material influences survival of a cemented total hip prosthesis in the Norwegian Arthroplasty Register. (external link)
• Yngvar Krukhaug; Stein Atle Lie; Leif Ivar Havelin et al. (2014). The results of 479 thumb carpometacarpal joint replacements reported in the Norwegian Arthroplasty Register. (external link)
• Rasmus Tyrsted Mikkelsen; Søren Overgaard; Alma B. Pedersen et al. (2023). Does choice of bearings influence the survival of cement-less total hip arthroplasty in patients aged 20–55 years? Comparison of 21,594 patients reported to the Nordic Arthroplasty Register Association dataset 2005–2017. (external link)
• Jan-Erik Gjertsen; Stein Atle Lie; Tarjei Vinje et al. (2012). More re-operations after uncemented than cemented hemiarthroplasty used in the treatment of displaced fractures of the femoral neck: an observational study of 11,116 hemiarthroplasties from a national register. (external link)
• Jan-Erik Gjertsen; Daniel Hoseth Nilsen; Ove Nord Furnes et al. (2024). 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. (external link)
• Håkon Greve Johannessen; Geir Hallan; Thomas Istvan Edelsvärd Kadar et al. (2024). Polyethylene wear and cup migration of cemented total hip arthroplasty with femoral heads made of oxidized zirconium, steel, or cobalt chromium: a 10-year secondary analysis from a randomized trial using radiostereometry. (external link)

Letter to the editor

• Stein Atle Lie; Leif Ivar Havelin; Anne Marie Fenstad et al. (2014). Re: a statistical analysis of ankle prosthesis from the Norwegian Arthroplasty Register. (external link)
• Jan-Erik Gjertsen; Stein Atle Lie; Tarjei Vinje et al. (2013). Authors' reply Cobb correspondence re: J-E. Gjertsen, S. A. Lie, T. Vinje, et al. More re-operations after uncemented than cemented hemiarthroplasty used in the treatment of displaced fractures of the femoral neck: An observational study of 11 116 hemiarthroplasties from a national register. J Bone Joint Surg [Br] 2012;94-B:1113-1119. (external link)

Conference lecture

• Øystein Johannes Gøthesen; Birgitte Espehaug; Stein Håkon Lygre et al. (2011). Implantatoverlevelse og revisjonsårsaker ved primær ”mobile bearing”, ”fixed modular bearing” og ”fixed non-modular bearing” totalprotese i kne. En rapport fra Nasjonalt register for leddproteser. (external link)
• Alexander Franciscus van Tol; Paul Johan Høl; Geir Hallan et al. (2016). Can clinical radiographs be used for large scale monitoring of polyethylene wear?. (external link)
• Peter Ellison; Paul Johan Høl; Geir Hallan et al. (2011). Et nasjonalt analysesenter for uthentetede ortopediske implantater. (external link)
• Peter Ellison; Paul Johan Høl; Geir Hallan et al. (2011). Økt løsning av sementert Titan hofteprotese – En studie på uthentet materiale. (external link)
• Susann Grosse; Paul Johan Høl; Hans Kristian Haugland et al. (2013). Comparison of wear particle exposure and tissue reactions in patients with cemented and uncemented titanium hip prostheses that failed due to osteolysis. (external link)
• Michelle Khan; Stein Håkon Låstad Lygre; Geir Hallan et al. (2023). Bruk av blodtomhet ved totalprotese i kne- 3 års oppfølging (2018-2021) med data fra Nasjonalt register for leddproteser. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2010). A randomized study of the Spectron EF and the Charnley flanged 40 cemented femoral components. (external link)
• Thomas Kadar; Leif Ivar Havelin; Kari Indrekvam et al. (2011). Betydningen av sementerte koppers inklinasjonsvinkel på plastslitasje og koppmigrasjon. En prospektiv randomisert studie. (external link)
• Anne Marie Fenstad; Ove Furnes; Geir Hallan et al. (2013). Using the Norwegian arthroplasty register to generate a DNA biobank. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Arne Kr Skredderstuen et al. (2014). Revisjon av total kneprotese uten patellakomponent med kun innsetting av patellakomponent.. (external link)
• Elin Haarr; Anne Marie Fenstad; Geir Hallan et al. (2022). SIMULTAN SEKVENSIELL BILATERAL KNEPROTESE SAMMENLIKNET MED SEKVENSIELLE OG UNILATERALE PROSEDYRER I NASJONALT REGISTER. (external link)
• Ines Kutzner; Paul Johan Høl; Geir Hallan et al. (2014). Early aseptic loosening of a mobile-bearing total knee replacement – A retrieval analysis. (external link)
• Paul Johan Høl; Peter John Ellison; Susann Wolf et al. (2019). Mekanismer for aseptisk løsning av sementert Spectron EF hoftestamme med Reflection kopp - en retrievalstudie. (external link)
• Ines Kutzner; Paul Johan Høl; Geir Hallan et al. (2014). Early aseptic loosening of a mobile-bearing total knee replacement – a retrieval analysis. (external link)
• Peter Ellison; Paul Johan Høl; Geir Hallan et al. (2012). The Titan hip stem problem - a retrieval study. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Pål Høvding et al. (2018). Revision of infected total knee arthroplasty: Do surgical strategies matter?. (external link)
• Tesfaye Hordofa Leta; Stein Håkon Låstad Lygre; Pål Høvding et al. (2018). Result of revision surgery for infected total knee arthroplasty. Do surgical strategies matter?. (external link)
• Gunnar Petursson; Øystein Gøthesen; Anne Marie Fenstad et al. (2014). Computernavigasjon vs konvensjonell teknikk ved kneprotesekirurgi. En prospektiv, randomisert, blindet RSA-studie. (external link)
• Håkon Greve Johannessen; Thomas Kadar; Geir Hallan et al. (2021). Polyethylene wear in total hip arthroplasty; comparing Oxinium and CoCr femoral heads using radiostereometry with 10 years follow-up. (external link)
• Paul Johan Høl; Geir Hallan; Ove Nord Furnes et al. (2020). Metallionenivåer i blod etter 10 år med hofteproteser med ulike hodematerialer. (external link)

Conference poster

• Aarid Liland Olsen; Liv Inger Strand; Liv Heide Magnussen et al. (2020). Patient Education and Basic Body Awareness Therapy versus Patient Education only in people with hip Osteoarthritis. A randomized controlled trial.. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2010). Wear of highly cross-linked and conventional ultra-high molecular weight semented polyethylene cups with oxidized zirconium (Oxinium) or Cobalt Chrome femoral heads. A randomized study of 150 hips using radiostereometric analysis. (external link)
• Håkon Greve Johannessen; Thomas Kadar; Geir Hallan et al. (2022). Polyethylene Wear In Total Hip Arthroplasty; Comparing Oxinium And CoCr Femoral Heads Using Radiostereometry With 10 Years Follow-Up. (external link)

Academic literature review

• Tesfaye Hordofa Leta; Jan-Erik Gjertsen; Håvard Dale et al. (2021). Antibiotic-loaded bone cement in prevention of periprosthetic joint infections in primary total knee arthroplasty: A register-based multicentre randomised controlled non-inferiority trial (ALBA trial). (external link)

Media feature article

• Paul Johan Høl; Ove Furnes; Geir Hallan et al. (2019). Kontrollen av medisinske implantater kan bli bedre. (external link)

Conference abstract

• Susann Grosse; Paul Johan Høl; Peer Kåre Lilleng et al. (2014). COMPARISON OF WEAR PARTICLE EXPOSURE AND TISSUE REACTIONS IN PATIENTS WITH CEMENTED AND UNCEMENTED TITANIUM HIP PROSTHESES THAT FAILED DUE TO OSTEOLYSIS. (external link)

Doctoral thesis (PhD)

• Geir Hallan (2007). Wear, fixation, and revision of hip prostheses. (external link)

See a complete overview of publications in NVA.