Blar i NTNU Open på forfatter "Øhrn, Frank-David"
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A 2-year RSA study of the Vanguard CR total knee system: A randomized controlled trial comparing patient-specific positioning guides with conventional technique
Øhrn, Frank-David; Leeuwen, Justin Arlen Maarten Joséphus; Tsukanaka, Masako; Röhrl, Stephan Maximillian (Journal article; Peer reviewed, 2018)Backgound and purpose - There is some concern regarding the revision rate of the Vanguard CR TKA in 1 registry, and the literature is ambiguous about the effi cacy of patient-specifi c positioning guides (PSPGs). The objective ... -
Arthroscopic meniscal surgery in Norway from 2010 to 2020: A paradigmatic shift
Nilsen, Karoline Nysted; Øhrn, Frank-David; Årøen, Asbjørn; Myklebust, Tor Åge; Aae, Tommy Frøseth (Journal article; Peer reviewed, 2024)Purpose: Meniscal injuries in the knee are usually treated surgically with arthroscopic partial resection (APR) or arthroscopic repair (AR). APR has been shown to increase the risk of osteoarthritis and the focus has shifted ... -
Contemporary total knee arthroplasty: Designs and surgical methods
Øhrn, Frank-David (Doctoral theses at NTNU;2022:98, Doctoral thesis, 2022)Moderne totalproteser i kneleddet- Design og kirurgiske teknikker Inngrepet totalprotese i kneleddet har gjennomgått en evolusjon de siste tiårene. Fra å være en kirurgisk prosedyre for de få, er det nå et av de mest ... -
CT-based migration analysis is more precise than radio-stereometric analysis for tibial implants: a phantom study on a porcine cadaver
Engseth, Lars; Schulz, Anselm; Pripp, Are Hugo; Rörhl, Stephan M. H.; Øhrn, Frank-David (Peer reviewed; Journal article, 2023)Background and purpose: Radiostereometric analysis (RSA) is the gold standard for migration analysis, but computed tomography analysis methods (CTRSA) have shown comparable results in other joints. We attempted to validate ... -
Decreased survival of medial pivot designs compared with cruciate-retaining designs in TKA without patellar resurfacing.
Øhrn, Frank-David; Gøthesen, Øystein; Lygre, Stein Håkon Låstad; Peng, Yi; Lian, Øystein Bjerkestrand; Lewis, Peter L; Furnes, Ove; Röhrl, Stephan Maximillian (Peer reviewed; Journal article, 2020)One of the authors (F-DØ) has received, during the study period, funding from the Møre and Romsdal Hospital Trust, Norway. The institution of one or more of the authors, the Center for Implant and Radiostereometric Research ... -
Dose reduction does not impact the precision of CT-based RSA in tibial implants: a diagnostic accuracy study on precision in a porcine cadaver
Øhrn, Frank-David; Engseth, Lars; Pripp, Are Hugo; Röhrl, Stephan Maximilian; Schulz, Anselm (Peer reviewed; Journal article, 2023)Background and purpose: Radiostereometric analysis (RSA) is the gold standard for evaluation of migration of implants. CT-RSA has been shown to have precision at the level of RSA in hip, shoulder, and knee joint replacements. ... -
Early migration of a medially stabilized total knee arthroplasty : a radiostereometric analysis study up to two years
Øhrn, Frank-David; Lian, Øystein Bjerkestrand; Tsukanaka, Masako; Röhrl, Stephan Maximillian (Peer reviewed; Journal article, 2021)Aims Medial pivot (MP) total knee arthroplasties (TKAs) were designed to mimic native knee kinematics with their deep medial congruent fitting of the tibia to the femur almost like a ball-on- socket, and a flat lateral ...