2024

• Christensen, Eidi; Foss, Olav A.; Holien, Toril; Juzenas, Petras; Qian, Peng. (2024) Application of Photodynamic Therapy with 5-Aminolevulinic Acid to Extracorporeal Photopheresis in the Treatment of Cutaneous T-Cell Lymphoma: A First-in-Human Phase I/II Study. Pharmaceutics
  Academic article
• Christensen, Eidi; Mørk, Erik; Foss, Olav Andreas; Mørk, Cato; Kroon, Susanne; Dotterud, Lars Kåre. (2024) New, simplified versus standard photodynamic therapy (PDT) regimen for superficial and nodular basal cell carcinoma (BCC): A single-blind, non-inferiority, randomised controlled multicentre study. PLOS ONE
  Academic article
• Mørk, Erik; Mjønes, Patricia Gjertrud; Foss, Olav A.; Mørk, Cato; Bachmann, Ingeborg Margrethe; Kroon, Susanne. (2024) Clinical versus Histological Assessment of Basal Cell Carcinoma Subtype and Thickness of Tumours Selected for Photodynamic Therapy. Acta Dermato-Venereologica
  Academic article

2023

• Mørk, Erik; Mjønes, Patricia Gjertrud; Foss, Olav A.; Bachmann, Ingeborg Margrethe; Christensen, Eidi. (2023) Expression of β-Catenin, E-Cadherin, and α-Smooth Muscle Actin in Basal Cell Carcinoma Before Photodynamic Therapy in Non-recurrent and Recurrent Tumors: Exploring the Ability of Predicting Photodynamic Therapy outcome. Journal of Histochemistry and Cytochemistry
  Academic article
• Winther, Siri Bjørgen; Klaksvik, Jomar; Foss, Olav A.; Wik, Tina Strømdal; Egeberg, Tarjei; Husby, Otto Schnell. (2023) The extent of first-time THA revision is not associated with patient-reported outcomes at 1-year follow-up: a study of 426 aseptic revisions. Acta Orthopaedica
  Academic article
• Haugan, Kristin; Foss, Olav A.; Husby, Otto Schnell; Husby, Vigdis Kvitland Schnell; Svenningsen, Svein; Winther, Siri Bjørgen. (2023) Surgical approach had minor association with femoral stem migration in total hip arthroplasty: radiostereometric analysis of 61 patients after 5-year follow-up. Acta Orthopaedica
  Academic article
• Håberg, Øyvind; Foss, Olav A.; Gundersen, Trude; Lian, Øystein Bjerkestrand; Hoel, Myrthle Slettvåg; Holen, Ketil Jarl. (2023) The incidence of late-detected developmental dysplasia of the hip and its functional outcomes: a 17-year cohort study using selective ultrasound screening. Acta Orthopaedica
  Academic article

2022

• Winther, Siri Bjørgen; Klaksvik, Jomar; Wik, Tina Strømdal; Husby, Otto Schnell; Egeberg, Tarjei; Snildalsli, Sølvi. (2022) Higher dissatisfaction rate following revision compared with primary total knee arthroplasty: 1-year follow-up of 2151 primary and 235 aseptic revision surgeries. Orthopedics
  Academic article
• Winther, Siri Bjørgen; Snorroeggen, Gøril Lund; Klaksvik, Jomar; Foss, Olav A.; Egeberg, Tarjei; Wik, Tina Strømdal. (2022) The indication for aseptic revision TKA does not influence 1-year outcomes: an analysis of 178 full TKA revisions from a prospective institutional registry. Acta Orthopaedica
  Academic article
• Christensen, Eidi; Foss, Olav A.; Qian, Peng. (2022) Extracorporeal Photopheresis with 5-Aminolevulinic Acid in patients with Graft-versus-Host disease. Acta Dermato-Venereologica
  Abstract
• Mørk, Erik; Mjønes, Patricia; Foss, Olav A.; Mørk, Cato; Bachmann, Ingeborg Margrethe; Kroon, Susanne. (2022) How well do experienced dermatologists clinically assess basal cell carcinoma subtype and thickness before treatment with photodynamic therapy? . Acta Dermato-Venereologica
  Abstract
• Håberg, Øyvind; Bremnes, Thomas Alexander; Foss, Olav A.; Angenete, Oskar W; Lian, Øystein Bjerkestrand; Holen, Ketil Jarl. (2022) Children treated for developmental dysplasia of the hip at birth and with normal acetabular index at 1 year: How many had residual dysplasia at 5 years?. Journal of Children's Orthopaedics
  Academic article

2021

• Haugan, Kristin; Klaksvik, Jomar; Foss, Olav A.. (2021) 30-day mortality in patients after hip fracture surgery: A comparison of the Charlson Comorbidity Index score and ASA score used in two prediction models. Injury
  Academic article
• Haugan, Kristin; Halsteinli, Vidar; Døhl, Øystein; Basso, Trude; Johnsen, Lars Gunnar; Foss, Olav A.. (2021) Health care services and costs after hip fracture, comparing conventional versus standardised care: A retrospective study with 12-month follow-up. Injury
  Academic article
• Christensen, Eidi; Foss, Olav A.; Quist-Paulsen, Petter; Staur, Ingrid; Pettersen, Frode; Holien, Toril. (2021) Application of photodynamic therapy with 5-aminolevulinic acid to extracorporeal photopheresis in the treatment of patients with chronic graft-versus-host disease: A first-in-human study. Pharmaceutics
  Academic article
• Liyanarachi, Suki; Hulleberg, Gunn; Foss, Olav A.. (2021) Is Gastrocnemius Tightness a Normal Finding in Children?: A Cross-Sectional Study of 204 Norwegian Schoolchildren. Journal of Bone and Joint Surgery. American volume
  Academic article

2020

• Sandbakken, Erik Thorvaldsen; Witsø, Eivind; Sporsheim, Bjørnar; Egeberg, Kjartan Wøllo; Foss, Olav A.; Hoang, Linh. (2020) Highly variable effect of sonication to dislodge biofilm-embedded Staphylococcus epidermidis directly quantified by epifluorescence microscopy: an in vitro model study. Journal of Orthopaedic Surgery and Research
  Academic article
• Borchgrevink, Grethe; Goihl, Tobias; Wik, Per Bendik; Selvig, Kjerstin; Foss, Olav A.. (2020) Does the Use of Lycra-Hip-Orthoses Stabilize Gait and Increase Activity among Adults with Neurological Disabilities?. International Journal of Foot and Ankle (IJFA)
  Academic article
• Winther, Siri Bjørgen; Foss, Olav; Klaksvik, Jomar; Husby, Vigdis Schnell. (2020) Pain and load progression following an early maximal strength training program in total hip- and knee arthroplasty patients. Journal of Orthopaedic Surgery
  Academic article
• Winther, Siri Bjørgen; Foss, Olav; Klaksvik, Jomar; Husby, Vigdis Schnell. (2020) Increased Muscle Strength Limits Postural Sway during Daily Living Activities in Total Hip Arthroplasty Patients. American Journal of Physical Medicine & Rehabilitation
  Academic article
• Håberg, Øyvind; Foss, Olav A.; Lian, Øystein Bjerkestrand; Holen, Ketil Jarl. (2020) Is foot deformity associated with developmental dysplasia of the hip?. The Bone & Joint Journal
  Academic article

2019

• Thomassen, Peter Joachim Bruun; Basso, Trude; Foss, Olav A.. (2019) Endoscopic Treatment of Greater Trochanteric Pain Syndrome - A Case Series of 11 Patients . Journal of Orthopaedic Case Reports
  Academic article

2018

• Schnell Husby, Vigdis; Foss, Olav A.; Husby, Otto Schnell; Winther, Siri Bjørgen. (2018) Randomized controlled trial of maximal strength training vs. standard rehabilitation following total knee arthroplasty. European Journal of Physical and Rehabilitation Medicine
  Academic article
• Øye, Christian Reidar; Foss, Olav A.; Holen, Ketil Jarl. (2018) Minor change in the sulcus angle during the first six years of life: A prospective study of the femoral trochlea development in dysplastic and normal knees. Journal of Children's Orthopaedics
  Academic article
• Winther, Siri Bjørgen; Foss, Olav A.; Husby, Otto Schnell; Wik, Tina Strømdal; Klaksvik, Jomar; Schnell Husby, Vigdis. (2018) A randomized controlled trial on maximal strength training in 60 patients undergoing total hip arthroplasty: Implementing maximal strength training into clinical practice. Acta Orthopaedica
  Academic article
• Olasz, Adel; Christensen, Eidi; Braun, Runa; Foss, Olav A.; Dotterud, Lars Kåre. (2018) Curettage and multiple needle puncture-assisted methyl-aminolaevulinate photodynamic therapy of basal cell carcinoma. EJD. European journal of dermatology
  Academic article
• Hillesund, Sigrun; Fromreide, Ida; Foss, Olav A.; Finsen, Vilhjalmur. (2018) The value of remembered pre-operative quick disabilities of the arm, shoulder and hand (QuickDASH) scores. Journal of Plastic Surgery and Hand Surgery
  Academic article
• Winther, Siri Bjørgen; Foss, Olav A.; Husby, Otto Schnell; Wik, Tina Strømdal; Klaksvik, Jomar; Schnell Husby, Vigdis. (2018) Muscular strength and function after total hip arthroplasty performed with three different surgical approaches: one-year follow-up study. HIP International
  Academic article

2017

• Haugan, Kristin; Johnsen, Lars Gunnar; Basso, Trude; Foss, Olav A.. (2017) Mortality and readmission following hip fracture surgery: A retrospective study comparing conventional and fast-track care. BMJ Open
  Academic article
• Wormdal, Asbjørn Høye; Tallaksen, Stian Hystad; Hagen, Øyvind Høgetveit; Foss, Olav A.; Finsen, Vilhjalmur. (2017) Remembered preoperative Quick disabilities of the arm, shoulder and hand (QuickDASH) scores. Journal of Hand Surgery (European Volume)
  Academic article
• Lundbom, Janne Svinndal; Tangen, Lena Flatlandsmo; Jørgensen, Kathrine Wågø; Skarsvåg, Trine Irene; Ballo, Solveig Mollan; Hjelseng, Tonje. (2017) The influence of Lidocaine temperature on pain during subcutaneous injection. Journal of Plastic Surgery and Hand Surgery
  Academic article

2016

• Winther, Siri Bjørgen; Husby, Vigdis Schnell; Foss, Olav A.; Wik, Tina Strømdal; Svenningsen, Svein; Engdal, Monika. (2016) Muscular strength after total hip arthroplasty. A prospective comparison of 3 surgical approaches. Acta Orthopaedica
  Academic article
• Øye, Christian; Foss, Olav A.; Holen, Ketil Jarl. (2016) Breech presentation is a risk factor for dysplasia of the femoral trochlea. Acta Orthopaedica
  Academic article
• Øye, Christian; Foss, Olav A.; Holen, Ketil Jarl. (2016) Breech presentation is a risk factor for dysplasia of the femoral trochlea. Acta Orthopaedica
  Letter to the editor
• Engdal, Monika; Foss, Olav A.; Taraldsen, Kristin; Schnell Husby, Vigdis; Winther, Siri Bjørgen. (2016) Daily Physical Activity in Total Hip Arthroplasty Patients Undergoing Different Surgical Approaches A Cohort Study. American Journal of Physical Medicine & Rehabilitation
  Academic article
• Høvik, Lise Husby; Winther, Siri Bjørgen; Foss, Olav A.; Gjeilo, Kari Hanne. (2016) Preoperative pain catastrophizing and postoperative pain after total knee arthroplasty: A prospective cohort study with one year follow-up. BMC Musculoskeletal Disorders
  Academic article
• Borchgrevink, Grethe; Viset, Annja Torlaug; Witsø, Eivind; Schei, Berit; Foss, Olav A.. (2016) Does the use of high-heeled shoes lead to fore-foot pathology? A controlled cohort study comprising 197 women. Foot and Ankle Surgery
  Academic article
• Foss, Olav A.; Mjønes, Patricia; Fismen, Silje; Christensen, Eidi. (2016) Is there a relationship between the stratum corneum thickness and that of the viable parts of tumour cells in basal cell carcinoma?. Journal of Skin Cancer
  Academic article
• Holmeslet, Berit; Klaksvik, Jomar; Goplen, Frederik Kragerud; Bugten, Vegard; Foss, Olav A.. (2016) The repeatability of oVEMP in response to low-frequency vibration against the vertex and forehead. Journal of Vestibular Research-Equilibrium & Orientation
  Academic article
• Christensen, Eidi; Mjønes, Patricia; Grimstad, Øystein; Rørdam, Ole Martin; Foss, Olav A.. (2016) Diagnostic Accuracy in Subtyping Basal Cell Carcinoma by Clinical Diagnosis Compared with Punch Biopsy. Acta Dermato-Venereologica
  Academic article
• Do, Duc Nhat Le; Kruke, Torbjørn Marstein; Foss, Olav A.; Basso, Trude. (2016) Reoperations and mortality in 383 patients operated with parallel screws for Garden I-II femoral neck fractures with up to ten years follow-up. Injury
  Academic article

2015

• Holmeslet, Berit; Foss, Olav; Bugten, Vegard; Brantberg, Krister. (2015) Ocular vestibular-evoked myogenic potentials (oVEMPs) in response to bone-conducted vertex vibration. Clinical Neurophysiology
  Academic article
• Winther, Siri Bjørgen; Foss, Olav A.; Wik, Tina Strømdal; Davis, Shawn Patric; Engdal, Monika; Jessen, Vigleik. (2015) 1-year follow-up of 920 hip and knee arthroplasty patients after implementing fast-track: Good outcomes in a Norwegian university hospital. Acta Orthopaedica
  Academic article
• Winther, Siri Bjørgen; Foss, Olav A.; Wik, Tina Stromdal; Davis, Shawn Patric; Engdal, Monika; Jessen, Vigleik. (2015) Erratum: 1-year follow-up of 920 hip and knee arthroplasty patients after implementing fast-track - Good outcomes in a Norwegian university hospital (Acta Orthopaedica (2015) 86, (78-85) DOI: 10.3109/17453674.2014.957089). Acta Orthopaedica
  Errata
• Hofstad, Janne Kristin; Winther, Siri Bjørgen; Rian, Torbjørn; Foss, Olav A.; Husby, Otto Schnell; Wik, Tina Strømdal. (2015) Perioperative local infiltration anesthesia with ropivacaine has no effect on postoperative pain after total hip arthroplasty. A randomized, double-blind, placebo-controlled trial with 116 patients. Acta Orthopaedica
  Academic article
• Christensen, Eidi; Mjønes, Patricia; Grimstad, Øystein; Rørdam, Ole Martin; Foss, Olav A.. (2015) Comparison of clinical and histopathological evaluations of basal cell carcinoma thickness. British Journal of Dermatology
  Academic article

2014

• Nysted, Mona Iren; Foss, Olav; Klaksvik, Jomar; Benum, Pål; Haugan, Kristin; Husby, Otto Schnell. (2014) Small and similar amounts of micromotion in an anatomical stem and a customized cementless femoral stem in regularshaped femurs : A 5-year follow-up randomized RSA study. Acta Orthopaedica
  Academic article
• Bjerke, Joakim; Öhberg, Fredrik; Nilsson, Kjell G.; Foss, Olav; Stensdotter, Ann-Katrin. (2014) Peak Knee Flexion Angles During Stair Descent in TKA Patients. Journal of Arthroplasty
  Academic article
• Midtdal, Kristin ; Blix, Hege Salvesen; Johnsen, Lars Gunnar; Foss, Olav. (2014) Epikrise med farmasøytnotat fra St. Olavs Hospital – når informasjonen fram?. Universitetet i Oslo Universitetet i Oslo
  Masters thesis
• Basso, Trude; Klaksvik, Jomar; Foss, Olav A. (2014) The effect of interlocking parallel screws in subcapital femoral-neck fracture fixation: a cadaver study. Clinical Biomechanics
  Academic article
• Granlund, Sylvia; Blix, Hege Salvesen; Johnsen, Lars Gunnar; Foss, Olav. (2014) Epikrise med farmasøytnotat fra St. Olavs Hospital – Når informasjonen fram?. Universitetet i Oslo Universitetet i Oslo
  Masters thesis
• Basso, Trude; Klaksvik, Jomar; Foss, Olav. (2014) Locking plates and their effects on healing conditions and stress distribution: A femoral neck fracture study in cadavers. Clinical Biomechanics
  Short communication
• Basso, Trude; Klaksvik, Jomar; Syversen, Unni; Foss, Olav. (2014) A biomechanical comparison of composite femurs and cadaver femurs used in experiments on operated hip fractures. Journal of Biomechanics
  Academic article
• Basso, Trude; Klaksvik, Jomar; Foss, Olav. (2014) Statistical consequences of using bone mineral density to pair cadaver femurs in comparative ex vivo hip fracture studies. The Bone & Joint Journal
  Academic article
• Øye, Christian; Holen, Ketil; Foss, Olav. (2014) Mapping of the femoral trochlea in a newborn population: an ultrasonographic study. Acta Radiologica
  Academic article
• Gifstad, Tone; Foss, Olav; Engebretsen, Lars; Lind, Martin; Forssblad, Magnus; Albrektsen, Grethe. (2014) Lower risk of revision with patellar tendon autografts compared with hamstring autografts: A registry study based on 45,998 primary ACL Reconstructions in Scandinavia. American Journal of Sports Medicine
  Academic article

2013

• Christensen, Eidi; Foss, Olav. (2013) Tykkelse av basalcellekarsinom. BestPractice
  Article in business/trade/industry journal

2012

• Haugan, Kristin; Husby, Otto Schnell; Klaksvik, Jomar; Foss, Olav. (2012) The migration pattern of the Charnley femoral stem: a five-yar follow-up RSA study in a well-functioning patient group. Journal of Orthopaedics and Traumatology
  Academic article
• Basso, Trude; Klaksvik, Jomar; Syversen, Unni; Foss, Olav A. (2012) Biomechanical femoral neck fracture experiments-A narrative review. Injury
  Academic literature review
• Bjørgen, Siri; Jessen, Vigleik; Husby, Otto Schnell; Røset, Øyvind; Foss, Olav A. (2012) Internt kvalitetsregister for leddproteser. Tidsskrift for Den norske legeforening
  Short communication

2011

• La Russa, Valentina; Skallerud, Bjørn Helge; Klaksvik, Jomar; Foss, Olav Andreas. (2011) Reduction in wire tension caused by wire clamping and wire tensioner removal: an experimental Ilizarov frame study. Proceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine
  Academic article
• La Russa, Valentina; Skallerud, Bjørn Helge; Klaksvik, Jomar; Foss, Olav Andreas. (2011) Reduction in wire tension caused by dynamic loading. An experimental Ilizarov frame study. Journal of Biomechanics
  Academic article
• Christensen, Eidi; Mjønes, Patricia Gjertrud; Foss, Olav Andreas; Rørdam, Ole Martin; Skogvoll, Eirik. (2011) Pre-treatment evaluation of basal cell carcinoma for photodynamic therapy: comparative measurement of tumour thickness in punch biopsy and excision specimens. Acta Dermato-Venereologica
  Academic article
• Wik, Tina Strømdal; Enoksen, Cathrine; Klaksvik, Jomar; Østbyhaug, Per Olav; Foss, Olav; Ludvigsen, Jarle. (2011) In vitro testing of the deformation pattern and initial stability of a cementless stem coupled to an experimental femoral head, with increased offset and altered femoral neck angles. Proceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine
  Academic article
• Nysted, Mona Iren; Benum, Pål; Klaksvik, Jomar; Foss, Olav; Aamodt, Arild. (2011) Periprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem A randomized DXA study with 5-year follow-up. Acta Orthopaedica
  Academic article
• Christensen, Eidi; Mørk, Cato; Foss, Olav Andreas. (2011) Pre-Treatment Deep Curettage Can Significantly Reduce Tumour Thickness in Thick Basal Cell Carcinoma While Maintaining a Favourable Cosmetic Outcome When Used in Combination with Topical Photodynamic Therapy. Journal of Skin Cancer
  Academic article

2010

• Wik, Tina Strømdal; Foss, Olav Andreas; Havik, Steinar; Persen, Leif; Aamodt, Arild; Witsø, Eivind. (2010) Periprosthetic fracture caused by stress shielding after implantation of a femoral condyle endoprosthesis in a transfemoral amputee-a case report. Acta Orthopaedica
  Academic article
• La Russa, Valentina; Skallerud, Bjørn Helge; Klaksvik, Jomar; Foss, Olav Andreas. (2010) Wire tension versus wire frequency: An experimental Ilizarov frame study. Journal of Biomechanics
  Academic article
• Husby, Otto Schnell; Haugan, Kristin; Benum, Pål; Foss, Olav A. (2010) A prospective randomised radiostereometric analysis trial of SmartSet HV and Palacos R bone cements in primary total hip arthroplasty. Journal of Orthopaedics and Traumatology
  Academic article

2009

• Pettersen, Sune Hansborg; Aamodt, Arild; Foss, Olav Andreas; Skallerud, Bjørn Helge. (2009) Subject specific finite element analysis of a callus distraction - a preliminary study. Tapir Akademisk Forlag
  Academic chapter/article/Conference paper

2008

• Foss, Olav Andreas; Klaksvik, Jomar; Benum, Pål; Anda, Svein. (2008) Polyethylene acetabular wear in hip prostheses: computer-simulated quantification of error caused by changes in pelvic orientation and direction of wear. Acta Orthopaedica
  Academic article
• Lunde, Knut Birger; Foss, Olav Andreas; Fosse, Lars; Skallerud, Bjørn Helge. (2008) Constitutive Models for Constrained Compression of Unimpacted and Impacted Human Morselized Bone Grafts. Journal of Biomechanical Engineering
  Academic article
• Lunde, Knut Birger; Foss, Olav Andreas; Skallerud, Bjørn Helge. (2008) On the applicability of bovine morsellized cortico-cancellous bone as a substitute for human morsellized cortico-cancellous bone for in-vitro mechanical testing. Journal of Biomechanics
  Academic article
• Foss, Olav Andreas; Benum, Pål. (2008) The Rotation Ratios Method A method to describe altered spatial orientation in sequential radiographs from one pelvis. Tapir Akademisk Forlag Tapir Akademisk Forlag
  Doctoral dissertation

2004

• Foss, Olav; Husebye, Steinar; Törnroos, Karl Wilhelm; Fanwick, PE. (2004) Synthesis and X-ray crystal structures of six [TeL4][MF6] salts, where L is ethylene- or trimethylene-thiourea, and M is Si, Ge or Sn. Five Te(II) complexes with a novel type of structure linked together by unusual N-H×××F hydrogen bonds. Polyhedron
  Academic article

1997

• Foss, Olav; Selstad, Tor. (1997) Regional arbeidsdeling. Aschehoug & Co Aschehoug & Co
  Non-fiction book