Browsing Bergen Open Research Archive by Author "Kärrholm, Johan"
Now showing items 1-15 of 15
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Countrywise results of total hip replacement. An analysis of 438,733 hips based on the Nordic Arthroplasty Register Association database
Mäkelä, Keijo T.; Matilainen, Markus; Pulkkinen, Pekka; Fenstad, Anne Marie; Havelin, Leif Ivar; Engesæter, Lars B.; Furnes, Ove; Overgaard, Søren; Pedersen, Alma Becic; Kärrholm, Johan; Malchau, Henrik; Garellick, Göran; Ranstam, Jonas; Eskelinen, Antti (Peer reviewed; Journal article, 2014)Background and purpose: An earlier Nordic Arthroplasty Register Association (NARA) report on 280,201 total hip replacements (THRs) based on data from 1995–2006, from Sweden, Norway, and Denmark, was published in 2009. The ... -
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
Mikkelsen, Rasmus Tyrsted; Overgaard, Søren; Pedersen, Alma B.; Kärrholm, Johan; Rolfson, Ola; Fenstad, Anne Marie; Furnes, Ove Nord; Hallan, Geir; Mäkelä, Keijo; Eskelinen, Antti; Varnum, Claus (Journal article; Peer reviewed, 2023)Background and purpose: The bearings with the best survivorship for young patients with total hip arthroplasty (THA) should be identified. We compared hazard ratios (HR) of revision of primary stemmed cementless THAs with ... -
Failure rate of cemented and uncemented total hip replacements: register study of combined Nordic database of four nations
Mäkelä, Keijo T.; Matilainen, Markus; Pulkkinen, Pekka; Fenstad, Anne Marie; Havelin, Leif Ivar; Engesæter, Lars B.; Furnes, Ove; Pedersen, Alma B; Overgaard, Søren; Kärrholm, Johan; Malchau, Henrik; Garellick, Göran; Ranstam, Jonas; Eskelinen, Antti (Peer reviewed; Journal article, 2014)Objective: To assess the failure rate of cemented, uncemented, hybrid, and reverse hybrid total hip replacements in patients aged 55 years or older. Design: Register study. Setting: Nordic Arthroplasty Register Association ... -
Hemiarthroplasties after hip fractures in Norway and Sweden: A collaboration between the Norwegian and Swedish national registries
Gjertsen, Jan Erik; Fenstad, Anne Marie; Leonardsson, Olof; Engesæter, Lars B.; Kärrholm, Johan; Furnes, Ove; Garellick, Göran; Rogmark, Cecilia (Peer reviewed; Journal article, 2014-05)National registration of hemiarthroplasties after hip fractures has been established in both Norway and Sweden. We aimed to investigate differences in demographics, choice of implant selection, surgical approaches, and ... -
Homogeneity in prediction of survival probabilities for subcategories of hipprosthesis data: The Nordic Arthroplasty Register Association, 2000-2013
Bartz-Johannessen, Christoffer; Furnes, Ove; Fenstad, Anne Marie; Lie, Stein Atle; Pedersen, Alma Becic; Overgaard, Søren; Kärrholm, Johan; Malchau, Henrik; Mäkelä, Keijo; Eskelinen, Antti; Wilkinson, Jeremy M (Peer reviewed; Journal article, 2019-07-10)Introduction: The four countries in the Nordic Arthroplasty Register Association (NARA) share geographic proximity, culture, and ethnicity. Pooling data from different sources in order to obtain higher precision and accuracy ... -
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
Hailer, Nils P.; Lazarinis, Stergios; Mäkelä, Keijo T.; Eskelinen, Antti; Fenstad, Anne Marie; Hallan, Geir; Havelin, Leif Ivar; Overgaard, Søren; Pedersen, Alma B.; Mehnert, Frank; Kärrholm, Johan (Peer reviewed; Journal article, 2014-09-01)Background and purpose — It is still being debated whether HA coating of uncemented stems used in total hip arthroplasty (THA) improves implant survival. We therefore investigated different uncemented stem brands, with and ... -
Increased risk of revision for infection in rheumatoid arthritis patients with total hip replacements. A study of 390,671 primary arthroplasties from the Nordic Arthroplasty Register Association
Schrama, Johannes Cornelis; Fenstad, Anne Marie; Dale, Håvard; Hallan, Geir; Overgaard, Søren; Pedersen, Alma B; Kärrholm, Johan; Garellick, Göran; Pulkkinen, Pekka; Eskelinen, Antti; Mäkelä, Keijo; Engesæter, Lars B.; Fevang, Bjørg-Tilde (Peer reviewed; Journal article, 2015)Background and purpose — Medical treatment of rheumatoid arthritis (RA) has changed dramatically over the last 15 years, including immune modulation. We investigated the risk of revision for infection after primary total ... -
Increased risk of revision of cementless stemmed total hip arthroplasty with metal-on-metal bearingsData from the Nordic Arthroplasty Register Association
Varnum, Claus; Pedersen, Alma B; Mäkelä, Keijo; Eskelinen, Antti; Havelin, Leif Ivar; Furnes, Ove; Kärrholm, Johan; Garellick, Göran; Overgaard, Søren (Peer reviewed; Journal article, 2015)Background and purpose — Data from the national joint registries in Australia and England and Wales have revealed inferior medium-term survivorship for metal-on-metal (MoM) total hip arthroplasty (THA) than for ... -
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)
Dale, Håvard; Fenstad, Anne Marie; Hallan, Geir; Havelin, Leif Ivar; Furnes, Ove; Overgaard, Søren; Pedersen, Alma B.; Kärrholm, Johan; Garellick, Göran; Pulkkinen, Pekka; Eskelinen, Antti; Mäkelä, Keijo; Engesæter, Lars B. (Peer reviewed; Journal article, 2012-10)Background and purpose: The risk of revision due to infection after primary total hip arthroplasty (THA) has been reported to be increasing in Norway. We investigated whether this increase is a common feature in the Nordic ... -
Increasing risk of revision due to infection after primary total hip arthroplasty: results from the Nordic Arthroplasty Register Association
Dale, Håvard; Fenstad, Anne Marie; Hallan, Geir; Overgaard, Søren; Pedersen, Alma B.; Hailer, Nils P.; Kärrholm, Johan; Rolfson, Ola; Eskelinen, Antti; Mäkelä, Keijo T.; Furnes, Ove Nord (Journal article; Peer reviewed, 2023)Background and purpose: The incidence of periprosthetic joint infection after total hip arthroplasty (THA) may be increasing. We performed time-trend analyses of risk, rates, and timing of revision due to infection after ... -
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?
Tsikandylakis, G; Kärrholm, Johan; Hallan, Geir; Furnes, Ove; Eskelinen, Antti; Mäkelä, Keijo T.; Pedersen, Alma B; Overgaard, Søren; Mohaddes, M. (Journal article; Peer reviewed, 2020)Background and purpose — 32-mm heads are widely used in total hip arthroplasty (THA) in Scandinavia, while the proportion of 36-mm heads is increasing as they are expected to increase THA stability. We investigated whether ... -
Outcome of 881 total hip arthroplasties in 747 patients 21 years or younger: data from the Nordic Arthroplasty Register Association (NARA) 1995-2016
Halvorsen, Vera Baasland; Fenstad, Anne Marie; Engesæter, Lars B.; Nordsletten, Lars; Overgaard, Søren; Pedersen, Alma B.; Kärrholm, Johan; MOHADDES, MAZIAR; Eskelinen, Antti; Mäkelä, Keijo T.; Röhrl, Stephan Maximillian (Peer reviewed; Journal article, 2019-05-19)Background and purpose — The literature is scarce on the outcome of the youngest patients with total hip arthroplasties (THAs). We analyzed register data, revision risk, and related factors in patients 21 years or younger ... -
Posterior approach and uncemented stems increases the risk of reoperation after hemiarthroplasties in elderly hip fracture patients
Rogmark, Cecilia; Fenstad, Anne Marie; Leonardsson, Olof; Engesæter, Lars B.; Kärrholm, Johan; Furnes, Ove; Garellick, Göran; Gjertsen, Jan Erik (Peer reviewed; Journal article, 2014)Background — Hemiarthroplasties are performed in great numbers worldwide but are seldom registered on a national basis. Our aim was to identify risk factors for reoperation after fracturerelated hemiarthroplasty in Norway ... -
Similar early mortality risk after cemented compared with cementless total hip arthroplasty for primary osteoarthritis: data from 188,606 surgeries in the Nordic Arthroplasty Register Association database
Pedersen, Alma B.; Mailhac, Aurélie; Garland, Anne; Overgaard, Søren; Furnes, Ove; Lie, Stein Atle; Fenstad, Anne Marie; Rogmark, Cecilia; Kärrholm, Johan; Rolfson, Ola; Haapakoski, Jaason; Eskelinen, Antti; Mäkelä, Keijo; Hailer, Nils P. (Journal article; Peer reviewed, 2021)Background and purpose — Current literature indicates no difference in 90-day mortality after cemented compared with cementless total hip arthroplasty (THA). However, previous studies are hampered by potential selection ... -
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
Van Steenbergen, Liza N.; Mäkelä, Keijo; Kärrholm, Johan; Rolfson, Ola; Overgaard, Søren; Furnes, Ove; Pedersen, Alma B.; Eskelinen, Antti; Hallan, Geir; Schreurs, Berend W.; Nelissen, Rob G.H.H. (Journal article; Peer reviewed, 2021)Background and purpose — Collaborations between arthroplasty registries are important in order to create the possibility of detecting inferior implants early and improve our understanding of differences between nations in ...