Sports Traumatology and Arthroscopy Research group (STAR)

The aim of this project is to determine whether meniscal root repair leads to superior pain relief, knee function, and reduced progression of osteoarthritis compared with a structured non-operative treatment approach. Patients presenting with acute meniscal root tears will be invited to participate and, following inclusion, randomized to either surgical root repair or unloading and physiotherapist-guided rehabilitation. Although previous studies suggest that surgical treatment is safe and may improve knee function, there is currently no comparative evidence demonstrating superior outcomes of operative versus non-operative management. This project therefore addresses a clinically important knowledge gap in the treatment of a common condition affecting middle-aged patients with early knee osteoarthritis.

At present, the evidence base in this field consists mainly of retrospective cohort and case–control studies, which are inherently prone to selection bias and thus limit evidence-based decision-making. There is a clear need for a prospective randomized controlled trial to address the proposed research questions. Outcomes will be evaluated using a combination of radiological measures, providing information on meniscal healing and structural joint changes, and patient-reported outcome measures assessing pain, symptoms, and functional development over time. The results of this study are expected to provide robust evidence to guide future treatment recommendations.

The purpose of this study is to investigate how graft tunnel placement during primary anterior cruciate ligament (ACL) reconstruction influences clinical outcomes. Using gold-standard 3D CT scans acquired immediately postoperatively, we will measure femoral and tibial tunnel positions and compare them to anatomical reference points established in prior studies. Patients who underwent ACL reconstruction at Haraldsplass Deaconess Hospital between 2013 and 2021 will

be included, with a minimum of two years of follow-up. The primary endpoint is clinical failure, defined as revision surgery, significant laxity, or positive pivot shift, while revision surgery will also be assessed as a secondary outcome. By correlating the achieved tunnel placement with clinical outcomes, this project aims to identify whether deviations from anatomical positioning increase the risk of graft failure and poor functional results.

This study is embedded within the interdisciplinary Sports Traumatology Research (STAR) Group and will utilize a combination of radiological measurements and patient-reported outcomes to evaluate results. Findings will provide clinically relevant guidance for improving ACL reconstruction techniques, reducing unwarranted variation in surgery, and ultimately decreasing the risk of revision procedures. By establishing clear relationships between tunnel placement and long-term outcomes, this research has the potential to optimize surgical strategies and enhance knee stability and function in patients undergoing ACL reconstruction.

This project investigates whether artificial intelligence can accurately and efficiently measure posterior tibial slope on knee radiographs—a key anatomical factor influencing outcomes in anterior cruciate ligament (ACL) surgery. Building on previous work from the STAR Group, which established normal tibial slope ranges and confirmed the reliability of manual measurements, the study evaluates a newly developed deep‑learning algorithm from Seoul National University Hospital. By automating slope assessment, the technology has the potential to reduce workload, minimize human error, and streamline preoperative planning for clinicians.

To validate the algorithm, the project uses an existing cohort of 728 patients who underwent ACL reconstruction at Haraldsplass Deaconess Hospital between 2002 and 2012. Manual measurements will be repeated and compared with automated readings generated through the Seoul-developed platform, assessing accuracy and both inter‑ and intra‑rater reliability. The findings may pave the way for broader adoption of AI‑supported radiographic analysis and contribute to more efficient, data‑driven orthopedic care.

This project investigates clinical outcomes after surgical treatment of tibial eminentia fractures using bioabsorbable nails at Haukeland University Hospital between 2013 and 2022. These injuries typically affect active children and adolescents, who risk reduced knee function and long‑term limitations if the fracture is not treated effectively. While most eminentia fractures heal without surgery, severely displaced injuries require operative fixation. Traditional methods using screws or sutures may risk growth‑plate disturbance or require later implant removal. The bioabsorbable‑nail technique used at Haukeland offers a minimally invasive, growth‑plate–sparing alternative, but published evidence on its effectiveness remains limited. This study aims

to validate the safety and clinical results of the method by examining radiological healing, knee stability, functional outcomes, and the rate of reoperations.

The study is designed as a retrospective review of all patients treated with this technique, supplemented by prospective clinical follow‑up. Researchers will assess injury mechanisms, anatomical risk factors such as posterior tibial slope, fracture classification, surgical details, and postoperative recovery. Eligible patients will be invited for a standardized clinical examination, including stability testing, range‑of‑motion assessment, and new radiographs, as well as completing validated knee‑function questionnaires (IKDC/pediKDC). By evaluating both clinical and radiological outcomes, the project seeks to determine whether bioabsorbable‑nail fixation is a reliable and effective treatment option.

Meniscus tears are among the most common knee injuries and a key driver of early osteoarthritis (OA). Although modern treatment has shifted from removing the damaged tissue to repairing it, there is still limited high‑quality evidence showing that repair truly prevents OA or improves long‑term outcomes. This project aims to close that knowledge gap by investigating whether current meniscus repair practices reduce OA risk, and by testing new biological and surgical strategies designed to improve healing and prevent treatment failure. Through national registry analyses, a randomized clinical trial using fibrin clot reinforcement, and advanced biomechanical testing of innovative repair techniques, the project seeks to determine which approaches best preserve knee function and joint cartilage over time.

The work is carried out by the STAR research group in collaboration with regional hospitals and international partners, with the goal of advancing meniscus surgery and establishing Norway as a leader in evidence‑based treatment of knee injuries. By improving meniscus healing and preventing OA, the project has the potential to significantly reduce long‑term disability, improve patient quality of life, and lower healthcare costs. The results will form the basis for national treatment guidelines, ensuring consistent, high‑quality care for patients with meniscus injuries across Norway.

The purpose of this project is to investigate whether functional performance tests (Biodex strength testing of knee extension/flexion and hop tests) can predict the risk of reinjury upon return to sport.

Individuals who sustain an ACL injury are often young and physically active, with a strong desire to return to sport. Most require surgical reconstruction of the ACL followed by a long period of rehabilitation. After rehabilitation, return-to-sport tests are performed by a physiotherapist to assess the patient’s risk of sustaining a new knee injury when returning to a “high-risk sport.”

We aim to recruit patients who have returned to sport after anterior cruciate ligament (ACL) reconstruction, to see whether they remain injury-free two years after surgery or have sustained new knee injuries.

Revision anterior cruciate ligament (ACL) reconstruction is becoming increasingly common as more young and active patients undergo primary ACL surgery. However, outcomes after revision surgery remain poorly understood, with studies suggesting worse knee function, lower return‑to‑sport rates, higher failure rates, and an increased risk of osteoarthritis compared with primary ACL reconstruction. Haraldsplass Deaconess Hospital has served as a regional centre for complex ACL revision surgery for decades, creating one of the largest single‑centre cohorts of revision cases in Norway. This project leverages unique dataset to evaluate medium‑ and long‑term outcomes after revision ACL surgery, focusing on knee function, stability, patient‑reported outcomes, activity levels, and the development of osteoarthritis.

The study compares all revision ACL surgeries performed at Haraldsplass from 2004–2016 with a matched control group of uneventful primary ACL reconstructions. Using structured clinical examinations, radiographic assessment, and validated outcome measures, the project aims to provide robust evidence on the true long‑term consequences of revision surgery and identify factors that influence prognosis—such as tunnel placement, mechanism of failure, or coexisting meniscal and cartilage injuries. The findings are expected to guide clinical decision‑making, improve surgical strategies, and ultimately optimize care for the growing number of patients facing revision ACL reconstruction.

The aim of this project is to develop a test battery consisting of questionnaires and physical tests that can be used in the follow-up of patients with patellar instability after surgery. This is done by collecting a range of information at different time points and monitoring patients’ progress over time. Part of the project involves translating a questionnaire into Norwegian and evaluating whether it is suitable for use in Norwegian-speaking patients. In addition, we want to highlight patients’ experiences of living with patellar instability. Therefore, we have conducted in-depth interviews with a group of patients.

What we have found so far:

· One of the questionnaires (the Banff Patellofemoral Instability Instrument) is well suited for this patient group.

· Living long term with patellar instability affects many aspects of daily life, leading patients to avoid both physical activity and social situations due to fear of the kneecap dislocating.

· Six months after surgery, many patients still have reduced knee function compared to their preoperative level.

Changes influenced by the study so far:

· Novel follow-up assessment routines have been implemented in collaborating institutions.

· The Banff Patellofemoral Instability Instrument has been implemented at several hospitals in Norway.

In this project, we investigated how healthcare providers can best follow up patients after ACL surgery to ensure a safe return to their desired activities. We had a particular interest in examining how mental factors may influence rehabilitation and return to sport.

The project consisted of three sub-studies:

1. Study 1: Translated and validated the ACL–Return to Sport After Injury scale, which measures patients’ mental readiness to challenge their knee post‑injury. The questionnaire showed good quality and is now used nationally, including at the Norwegian Olympic Training Center (Olympiatoppen).

2. Study 2: Identified which tests best determine readiness for return to sport. A combination of mental readiness, muscle strength, and hop performance provided the most reliable assessment of when it is safe to return.

3. Study 3: Examined whether knee laxity tests contribute to return‑to‑sport decisions and whether laxity is linked to fear of re‑injury. One laxity test was particularly useful, but knee laxity and fear were only weakly related, meaning both should be assessed independently.

Hysing-Dahl T, Waaler PAS, Faleide AGH, Inderhaug E. Preoperative kinesophobia affects self-perceived knee function and quality of life after patellar stabilising surgery. J Exp Orthop. 2026 Jan 8;13(1):e70615. doi: 10.1002/jeo2.70615.

Zsidai B, Winkler PW, Pruneski JA, Råkeberg K, Cristiani R, Inderhaug E, Lind M, Musahl V, Senorski EH, Samuelsson K, Horvath A. Delayed primary isolated posterior cruciate ligament reconstruction is not associated with intraarticular injury prevalence: A study from the Scandinavian knee ligament registries. J ISAKOS. 2026 Jan 23:101070. doi: 10.1016/j.jisako.2026.101070.

Park J, Persson A, Martin RK, Inderhaug E, Kim SE, Kim S, Kwak D, Ro DH. Effects of axial malrotation on posterior tibial slope measurement: a digitally reconstructed radiograph study enabling automated quality assessment. Knee Surg Relat Res. 2026 Jan 27;38(1):3. doi: 10.1186/s43019-026-00303-x.
 

Hysing-Dahl T, Faleide AG, Magnussen LH, Inderhaug E. The Norwegian version of the Norwich Patellar Instability score has good validity and moderate reproducibility. J Exp Orthop. 2025 Jan 10;12(1):e70095. doi: 10.1002/jeo2.70095

Vindfeld S, Persson A, Lindanger L, Fenstad AM, Visnes H, Inderhaug E. Revision Anterior Cruciate Ligament Reconstruction: Surgeon-Reported Causes of Failure From the Norwegian Knee Ligament Register. Am J Sports Med. 2025 Mar;53(4):801-808. doi: 10.1177/03635465251316308.

Hysing-Dahl T, Faleide AGH, Waaler PAS, Inderhaug E. The ability of the Knee Osteoarthritis Outcome Score to detect changes over time is limited in patients with patellar instability due to substantial ceiling effect. J Exp Orthop. 2025 Apr 1;12(2):e70146. doi: 10.1002/jeo2.70146.  

Ryu B, Nam JW, Ro DH, Martin RK, Inderhaug E, Persson A, Haland S, Kim SE. Automated Posterior Tibial Slope Measurement Using Lateral Knee Radiographs: A Novel Landmark-Based Approach Using Deep Learning. Orthop J Sports Med. 2025 Apr 22;13(4):23259671251331067. doi: 10.1177/23259671251331067.

Martin KR, Haaland S, Persson A, Kim SE, Ryu B, Nam JW, Ro DH, Inderhaug E. External Validation of a Novel Landmark-Based Deep Learning Automated Tibial Slope Measurement Algorithm Applied on Short Radiographs Obtained in Patients With ACL Injuries. Orthop J Sports Med. 2025 May 5;13(5):23259671251333607. doi: 10.1177/23259671251333607.  

Sonnery-Cottet B, Carrozzo A, Saithna A, Monaco E, Vieira TD, Musahl V, Getgood A, Helito CP; International Experts Panel. Surgical Treatment and Complications of Lateral Extra-articular Procedures in the Anterior Cruciate Ligament-Reconstructed Knee: Part II of an International Consensus Statement. Arthroscopy. 2025 Sep;41(9):3313-3321. doi: 10.1016/j.arthro.2025.06.013.  

Sonnery-Cottet B, Carrozzo A, Saithna A, Monaco E, Vieira TD, Musahl V, Getgood A, Helito CP; International Experts Panel; Bedi A, Bryant D, Cavaignac E, Chahla J, Claes S, Cordasco F, Daggett M, Devitt B, Feller J, Fink C, Frank R, Geeslin A, Grassi A, Green D, Guenther D, Heard M, Herbst E, Hopper G, Inderhaug E, Irrgang J, Kaeding C, Kittl C, Kocher M, Koga H, Krych AJ, LaPrade R, Levy B, Litchfield RB, Lording T, Lowe W, MacDonald P, Marx R, Moatshe G, Neri T, Ouanezar H, Barion de Castro Padua V, Parker D, Pioger C, Servien E, Sherman S, Smith P, Spalding T, Tapasvi S, Verdonk P, Williams A, Xerogeanes J, Young SW. Indications for Lateral Extra-articular Procedures in the Anterior Cruciate Ligament-Reconstructed Knee: Part I of an International Consensus Statement. Arthroscopy. 2025 Sep;41(9):3303-3312. doi: 10.1016/j.arthro.2025.06.012.

Waaler PAS, Inderhaug E, Birkenes T, Kjellsen AB, Hysing-Dahl T. Estimation of the patient acceptable symptom state (PASS) threshold for the Banff Patellofemoral Instability Instrument 2.0. Knee Surg Sports Traumatol Arthrosc. 2025 Sep 5. doi: 10.1002/ksa.70061

Vinje T, Inderhaug E, Jarning J, Hole RM, Vetti N, Malt MA, Matre K. Suture-Button Repair Improves Outcomes in Arthroscopically Diagnosed Chronic Syndesmotic Injury Despite Low Imaging Sensitivity. Arthrosc Sports Med Rehabil. 2025 Jul 29;7(5):101227. doi: 10.1016/j.asmr.2025.101227.

LaPrade RF, Gerhold C, Kunze KN, Geeslin AG, Tollefson LV, Dave U, Garcia JR, Barenius B, Brown C, de Oliveira Campos TV, Cohen M, Engebretsen L, Ferrer G, Franciozi CE, Fritsch BA, Frosch KH, Gelber PE, Getgood A, Hantes M, Held M, Helito CP, Inderhaug E, Johansen S, Lagae KC, Levy BA, Lind M, Lording T, Maestu R, Margheritini F, Menetrey J, Moatshe G, Monllau JC, Murray IR, Negrín R, Parker DA, Pujol N, Robinson J, Samuelsson K, Stevenson C, Tuca MJ, Uchida S, van der Wal WA, Villascusa S, Von Bormann RPB, Chahla J. A Contemporary International Expert Consensus Statement on the Evaluation, Diagnosis, Treatment, and Rehabilitation of Injuries to the Posterolateral Corner of the Knee. Arthroscopy. 2025 Nov;41(11):4630-4640. doi: 10.1016/j.arthro.2025.04.055.

Chahla J, Garcia JR, Tollefson L, Dzidzishvili L, Allende F, Gerhold C, Krych AJ, LaPrade RF; Meniscus Root International Expert Group. International Delphi Consensus on Medial Meniscal Root Tears Shows High Agreement on Diagnosis, Treatment, and Rehabilitation but Lack of Agreement on Treatment of Asymptomatic Tears. Arthroscopy. 2025 Nov;41(11):4683-4698. doi: 10.1016/j.arthro.2025.06.028

Hysing-Dahl T, Visnes H, Straume-Næsheim TM, Waaler PAS, Kjellsen A, Warø HA, Øye C, Hansen AK, Tandberg A, Persson A, Inderhaug E. Incidence and treatment strategy for patellar instability in Norway. J Exp Orthop. 2025 Nov 14;12(4):e70519. doi: 10.1002/jeo2.70519.

Vuletić F, Inderhaug E, Martin RK, Drogset JO, Hansen AK, Lygre SHL, Visnes H, Persson A. Use of hamstring autografts for ACL reconstruction significantly decreased the risk of reporting problems with kneeling at a 5-year follow-up. J Exp Orthop. 2025 Nov 28;12(4):e70577. doi: 10.1002/jeo2.70577.

Vuletić F, Inderhaug E, Martin RK, Drogset JO, Hansen AK, Lygre SHL, Visnes H, Persson A. Use of hamstring autografts for ACL reconstruction significantly decreased the risk of reporting problems with kneeling at a 5-year follow-up. J Exp Orthop. 2025 Nov 28;12(4):e70577. doi: 10.1002/jeo2.70577.

Ingunn Fleten Mo, Thomas Harlem, Anne Gro Heyn Faleide, Torbjørn Strand, Søren Vindfeld, Eirik Solheim, Per Henrik Randsborg, Eivind Inderhaug (2025)  Comparable Mid- to Long-term Outcomes of Semitendinosus and Semitendinosus/Gracilis Grafts in ACL Reconstruction: Median 8-Year (Range, 5-10 Years) Results From a Randomized Controlled Study. The American journal of sports medicine 53:  9.  2145-2153 Jul.

Eirik Solheim, Christine Villholth, Caryl Gay, Eivind Inderhaug (2025)  Arthroscopic Treatment of Frozen Shoulder: Techniques, Pearls, and Pitfalls Journal of Orthopaedic Reports 100663 April.

Kristine Mundal, Andrew G Geeslin, Eirik Solheim, Eivind Inderhaug (2025)  Differences Between Traumatic and Degenerative Medial Meniscus Posterior Root Tears: A Systematic Review. The American journal of sports medicine 53:  1.  228-233 Jan.

Hysing-Dahl T, Inderhaug E. Rehabilitation after surgery for patellar instability. J Exp Orthop. 2024 Jun 16;11(3):e12062. doi: 10.1002/jeo2.12062.

Waaler PAS, Kjellsen AB, Hysing-Dahl T, Inderhaug E. Evaluation of Patellar Dysplasia and Postoperative Pain After Mini-Open, Thin-Flap Trochleoplasty: A Retrospective Analysis of 75 Consecutive Cases. Orthop J Sports Med. 2024 Aug 27;12(8):23259671241270352. doi: 10.1177/23259671241270352.  

Thomas Birkenes, Ove Furnes, Stein Haakon Laastad Lygre, Eirik Solheim, Asbjorn Aaroen, Gunnar Knutsen, Jon Olav Drogset, Stig Heir, Lars Engebretsen, Sverre Loken, Haavard Visnes (2024)  Long-Term Outcomes of Arthroscopically Verified Focal Cartilage Lesions in the Knee: A 19-Year Multicenter Follow-up with Patient-Reported Outcomes. The Journal of bone and joint surgery. American volume 106:  21.  1991-2000 Nov. 

Ingunn Fleten Mo, Thomas Harlem, Anne Gro Heyn Faleide, Torbjørn Strand, Søren Vindfeld, Eirik Solheim, Eivind Inderhaug (2024)  ACL Reconstruction Using Quadrupled Semitendinosus Versus Double-Stranded Semitendinosus and Gracilis Autograft: 2-Year Results From a Prospective Randomized Controlled Study. The American journal of sports medicine 52:  8.   1927-1936 Jul. 

Thomas Birkenes, Ove Furnes, Stein Håkon Låstad Lygre, Eirik Solheim, Asbjørn Årøen, Gunnar Knutsen, Jon Olav Drogset, Stig Heir, Lars Engebretsen, Sverre Løken, Håvard Visnes (2024)  Previous cartilage surgery is associated with inferior patient-reported outcomes after knee arthroplasty. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 32:  2.   361-370 Feb. 

 

Pilskog K, Høvding P, Inderhaug E, Fevang JM, Dale H. Fracture-related infection: Prevalence and application of the new consensus definition in a cohort of 1004 surgically treated ankle fractures. Injury. 2023 Mar;54(3):841-847. doi: 10.1016/j.injury.2022.12.030.

Hysing-Dahl T, Magnussen LH, Faleide AGH, Kjellsen AB, Mo IF, Waaler PAS, Mundal R, Inderhaug E. Cross-cultural Validation of the Norwegian Version of the Banff Patellofemoral Instability Instrument 2.0. Orthop J Sports Med. 2023 May 19;11(5):23259671231168881. doi: 10.1177/23259671231168881.

Hysing-Dahl T, Inderhaug E, Faleide AGH, Magnussen LH. Patients' experiences of living with patellar instability before and after surgery: a qualitative interview study. BMJ Open. 2023 Jun 9;13(6):e072141. doi: 10.1136/bmjopen-2023-072141.

Hysing-Dahl T, Magnussen LH, Faleide AGH, Inderhaug E. Feasibility of return to sports assessment 6 months after patellar instability surgery. BMC Musculoskelet Disord. 2023 Aug 18;24(1):662. doi: 10.1186/s12891-023-06767-2.  

Faleide AGH, Inderhaug E. It is time to target psychological readiness (or lack of readiness) in return to sports after Anterior Cruciate Ligament tears. J Exp Orthop. 2023 Sep 20;10(1):94. doi: 10.1186/s40634-023-00657-1.

Vindfeld S, Lindanger L, Inderhaug E. Allogenous Bone Grafting Technique for Staged Revision Anterior Cruciate Ligament Surgery. Video J Sports Med. 2023 Sep 28;3(5):26350254231200038. doi: 10.1177/26350254231200038.

Pilskog K, Høvding P, Fenstad AM, Inderhaug E, Fevang JM, Dale H. Risk factors for fracture-related infection after ankle fracture surgery. Injury. 2023 Oct;54(10):111011. doi: 10.1016/j.injury.2023.111011.

Eirik Solheim, Maja Rosenlund, Karen Gjørwad Ulsaker, Anagha P Parkar (2023)  Self-assessment of range of motion in patients undergoing surgery for a unilateral shoulder condition. Acta orthopaedica et traumatologica turcica 57:  6.  340-347 Sep.

Thomas Birkenes, Ove Furnes, Stein Haakon Laastad Lygre, Eirik Solheim, Asbjorn Aaroen, Gunnar Knutsen, Jon Olav Drogset, Stig Heir, Lars Engebretsen, Sverre Loken, Haavard Visnes (2023)  The Long-Term Risk of Knee Arthroplasty in Patients with Arthroscopically Verified Focal Cartilage Lesions: A Linkage Study with the Norwegian Arthroplasty Register, 1999 to 2020. The Journal of bone and joint surgery. American volume 105:  12.  951-961 Jun.

Eirik Solheim, Caryl Gay, Janne Hegna, Eivind Inderhaug (2023)  Arthroscopic treatment of tennis elbow: Surgical techniques, pearls and pitfalls Journal of Orthopaedic Reports April.

Pilskog K, Gote TB, Odland HEJ, Fjeldsgaard KA, Dale H, Inderhaug E, Fevang JM. Association of Delayed Surgery for Ankle Fractures and Patient-Reported Outcomes. Foot Ankle Int. 2022 Jun;43(6):762-771. doi: 10.1177/10711007211070540.

Waaler PAS, Jellestad T, Hysing-Dahl T, Elvehøy E, Inderhaug E. Insall proximal realignment with/without tibial tubercle osteotomy for recurrent patellar instability yields acceptable medium- to long-term results but risk of osteoarthritis progression is considerable. J Exp Orthop. 2022 Jul 6;9(1):64. doi: 10.1186/s40634-022-00502-x.

LaPrade RF, Geeslin AG, Chahla J, Cohen M, Engebretsen L, Faucett SC, Getgood AM, Inderhaug E, Johnson DL, Kopf S, Krych AJ, Larson CM, Lind M, Moatshe G, Murray IR, Musahl V, Negrin R, Riboh JC, Seil R, Spalding T. Posterior Lateral Meniscal Root and Oblique Radial Tears: The Biomechanical Evidence Supports Repair of These Tears, Although Long-Term Clinical Studies Are Necessary. Arthroscopy. 2022 Dec;38(12):3095-3101. doi: 10.1016/j.arthro.2022.09.015.

Bateman, Marcus, Evans, P Jonathan, Vuvan, Viana, Jones, Val, Watts, C Adam, Phadnis, Joideep, Bisset, M Leanne, Vicenzino, Bill, Andia, Isabel, Arrigoni, Paolo, Aydin, Canan, Barratt, Paul, Chidambaram, Ram, Cleland, Joshua, Coombes, Brooke, Farkash, Uri, Gosens, Taco, Heales, Luke, Kroslak, Martin, Littlewood, Chris, MacDermid, Joy, Murrell, George, Olaussen, Morten, Orchard, John, Pienimaki, Tuomo, Rangan, Amar, Solheim, Eirik Johan, Stasinopoulos, Dimitrios, Thomas, Jill, Tyler, Timothy, Van Der Windt, Danielle, Van Riet, Roger, Wang, Allan, Waugh, Esther, Wolf, Jennifer Moriatis, Wright, Tony, Zeisig, Eva, Zheng, Ming Hao, Mistry, Priyesh, Newsome, Ruth, Ford, Mark, Jackson, Karen, Le, Phuong, Song, Joo Yeun (2022)  Development of a core outcome set for lateral elbow tendinopathy (COS-LET) using best available evidence and an international consensus process. British journal of sports medicine 56:  12.  657-666 Jun.

Eirik Solheim, Caryl Gay, Janne Hegna, Eivind Inderhaug (2022)  Mosaicplasty of the knee: Surgical techniques, pearls and pitfall Journal of Orthopaedic Reports 1:  4.  100097 Dec.

Eirik Solheim, Torbjørn Grøntvedt, Anders Mølster, Gisle Uppheim, Caryl Gay, Sigbjørn Dimmen (2022)  Milestones in the Early History of Arthroscopy Journal of Orthopaedic Reports 1:  3.  100060 Sep.

Lene Dæhlin, Eivind Inderhaug, Torbjørn Strand, Anagha P Parkar, Eirik Solheim (2022)  The Effect of Posterior Tibial Slope on the Risk of Revision Surgery After Anterior Cruciate Ligament Reconstruction. The American journal of sports medicine 50:  1.  103-110 01.

Line Lindanger, Torbjørn Strand, Anders Odd Mølster, Eirik Solheim, Cornelia Fischer-Bredenbeck, Olga Therese Ousdal, Eivind Inderhaug (2022)  Predictors of Osteoarthritis Development at a Median 25 Years After Anterior Cruciate Ligament Reconstruction Using a Patellar Tendon Autograft. The American journal of sports medicine 50:  5.  1195-1204 04.

Faleide AGH, Magnussen LH, Strand T, Bogen BE, Moe-Nilssen R, Mo IF, Vervaat W, Inderhaug E. The Role of Psychological Readiness in Return to Sport Assessment After Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2021 Apr;49(5):1236-1243. doi: 10.1177/0363546521991924. 
 
Faleide AGH, Magnussen LH, Bogen BE, Strand T, Mo IF, Vervaat W, Inderhaug E. Association Between Psychological Readiness and Knee Laxity and Their Predictive Value for Return to Sport in Patients With Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2021 Aug;49(10):2599-2606. doi: 10.1177/03635465211021831.

Line Lindanger, Torbjørn Strand, Anders Odd Mølster, Eirik Solheim, Eivind Inderhaug (2021)  Effect of Early Residual Laxity After Anterior Cruciate Ligament Reconstruction on Long-term Laxity, Graft Failure, Return to Sports, and Subjective Outcome at 25 Years. The American journal of sports medicine 49:  5.  1227-1235 04.

Eirik Solheim, Eivind Inderhaug (2021)  Ultrasound-Assisted Endoscopic Removal of Pretibial Cysts Related to Biointerference Screw Degradation. Arthroscopy techniques 10:  5.  e1287-e1292 May.

Slagstad I, Parkar AP, Strand T, Inderhaug E. Incidence and Prognostic Significance of the Segond Fracture in Patients Undergoing Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2020 Apr;48(5):1063-1068. doi: 10.1177/0363546520905557.

Robinson J, Inderhaug E, Harlem T, Spalding T, Brown CH Jr. Anterior Cruciate Ligament Femoral Tunnel Placement: An Analysis of the Intended Versus Achieved Position for 221 International High-Volume ACL Surgeons. Am J Sports Med. 2020 Apr;48(5):1088-1099. doi: 10.1177/0363546520906158

Faleide AGH, Inderhaug E, Vervaat W, Breivik K, Bogen BE, Mo IF, Trøan I, Strand T, Magnussen LH. Anterior cruciate ligament-return to sport after injury scale: validation of the Norwegian language version. Knee Surg Sports Traumatol Arthrosc. 2020 Aug;28(8):2634-2643. doi: 10.1007/s00167-020-05901-0.

Pilskog K, Gote TB, Odland HEJ, Fjeldsgaard KA, Dale H, Inderhaug E, Fevang JM. Traditional Approach vs Posterior Approach for Ankle Fractures Involving the Posterior Malleolus. Foot Ankle Int. 2021 Apr;42(4):389-399. doi: 10.1177/1071100720969431.
Søren Vindfeld, Torbjørn Strand, Eirik Solheim, Eivind Inderhaug (2020)  Failed Meniscal Repairs After Anterior Cruciate Ligament Reconstruction Increases Risk of Revision Surgery. Orthopaedic journal of sports medicine 8:  10.  Oct.

Eirik Solheim, Janne Hegna, Eivind Inderhaug (2020)  Clinical outcome after mosaicplasty of knee articular cartilage defects of patellofemoral joint versus tibiofemoral joint. Journal of orthopaedics 18:  36-40 Mar/Apr.

Eirik Solheim, Janne Hegna, Eivind Inderhaug (2020)  Long-Term Survival after Microfracture and Mosaicplasty for Knee Articular Cartilage Repair: A Comparative Study Between Two Treatments Cohorts. Cartilage 11:  1.  71-76 01.

Inderhaug E, Drogset JO, Lygre SHL, Gifstad T. No effect of graft size or body mass index on risk of revision after ACL reconstruction using hamstrings autograft. Knee Surg Sports Traumatol Arthrosc. 2020 Mar;28(3):707-713. doi: 10.1007/s00167-019-05395-5.

Eivind Inderhaug, Eirik Solheim (2019)  Osteochondral Autograft Transplant (Mosaicplasty) for Knee Articular Cartilage Defects. JBJS essential surgical techniques 9:  4.  Oct/Dec.

Line Lindanger, Torbjørn Strand, Anders Odd Mølster, Eirik Solheim, Eivind Inderhaug (2019)  Return to Play and Long-term Participation in Pivoting Sports After Anterior Cruciate Ligament Reconstruction. The American journal of sports medicine Oct.

Anagha P Parkar, Miraude E A P M Adriaensen, Lasse M Giil, Eirik Solheim (2019)  Computed Tomography Assessment of Anatomic Graft Placement After ACL Reconstruction: A Comparative Study of Grid and Angle Measurements. Orthopaedic journal of sports medicine 7:  3.  Mar.

Inderhaug E, Schelp CH, Glambek I, Kristiansen IS. Cost-effectiveness analysis of five procedures for great saphenous vein reflux in a Norwegian healthcare setting or societal setting. SAGE Open Med. 2018 Sep 24;6:2050312118801709. doi: 10.1177/2050312118801709.

Inderhaug E, Stephen JM, Williams A, Amis AA. Effect of Anterolateral Complex Sectioning and Tenodesis on Patellar Kinematics and Patellofemoral Joint Contact Pressures. Am J Sports Med. 2018 Oct;46(12):2922-2928. doi: 10.1177/0363546518790248

Getgood A, Brown C, Lording T, Amis A, Claes S, Geeslin A, Musahl V; ALC Consensus Group. The anterolateral complex of the knee: results from the International ALC Consensus Group Meeting. Knee Surg Sports Traumatol Arthrosc. 2019 Jan;27(1):166-176. doi: 10.1007/s00167-018-5072-6.  

Inderhaug E. New, improved and less costly treatment for varicose veins. Tidsskr Nor Laegeforen. 2019 Mar 11;139(5). Norwegian, English. doi: 10.4045/tidsskr.19.0075.

Eivind Inderhaug, Maiken Kalsvik, Kristin H Kollevold, Janne Hegna, Eirik Solheim (2018)  Long-term results after surgical treatment of subacromial pain syndrome with or without rotator cuff tear. Journal of orthopaedics 15:  3.  757-760 Sep.

Eirik Solheim, Janne Hegna, Eivind Inderhaug (2018)  Early determinants of long-term clinical outcome after cartilage repair surgery in the knee. Journal of orthopaedics 15:  1.  222-225 Mar.

Anagha P Parkar, Kristiane Bleskestad, Susanne Løken, Miraude E A P M Adriaensen, Eirik Solheim (2018)  Protruding anterior medial meniscus-An indirect sign of posterior cruciate ligament deficiency. European journal of radiology 99:  146-153 Feb.

Eirik Solheim, Janne Hegna, Torbjørn Strand, Thomas Harlem, Eivind Inderhaug (2018)  Randomized Study of Long-term (15-17 Years) Outcome After Microfracture Versus Mosaicplasty in Knee Articular Cartilage Defects. The American journal of sports medicine 46:  4.  826-831 Mar.

Athwal KK, El Daou H, Inderhaug E, Manning W, Davies AJ, Deehan DJ, Amis AA. An in vitro analysis of medial structures and a medial soft tissue reconstruction in a constrained condylar total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc. 2017 Aug;25(8):2646-2655. doi: 10.1007/s00167-016-4087-0.  

Inderhaug E, Stephen JM, El-Daou H, Williams A, Amis AA. The Effects of Anterolateral Tenodesis on Tibiofemoral Contact Pressures and Kinematics. Am J Sports Med. 2017 Nov;45(13):3081-3088. doi: 10.1177/0363546517717260.

Inderhaug E, Stephen JM, Williams A, Amis AA. Anterolateral Tenodesis or Anterolateral Ligament Complex Reconstruction: Effect of Flexion Angle at Graft Fixation When Combined With ACL Reconstruction. Am J Sports Med. 2017 Nov;45(13):3089-3097. doi: 10.1177/0363546517724422.

Kittl C, Inderhaug E, Williams A, Amis AA. Biomechanics of the Anterolateral Structures of the Knee. Clin Sports Med. 2018 Jan;37(1):21-31. doi: 10.1016/j.csm.2017.07.004.

Inderhaug E, Williams A. Do We Need Extra-Articular Reconstructive Surgery? Clin Sports Med. 2018 Jan;37(1):61-73. doi: 10.1016/j.csm.2017.07.008.

Eirik Solheim, Janne Hegna, Eivind Inderhaug (2017)  Long-term clinical follow-up of microfracture versus mosaicplasty in articular cartilage defects of medial femoral condyle. The Knee 24:  6.   1402-1407 Dec. 

Eivind Inderhaug, Kristin H Kollevold, Maiken Kalsvik, Janne Hegna, Eirik Solheim (2017)  Preoperative NSAIDs, non-acute onset and long-standing symptoms predict inferior outcome at long-term follow-up after rotator cuff repair. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 25:  7.   2067-2072 Jul. 

Eivind Inderhaug, Allan Larsen, Per Arne Waaler, Torbjørn Strand, Thomas Harlem, Eirik Solheim (2017)  The effect of intraoperative fluoroscopy on the accuracy of femoral tunnel placement in single-bundle anatomic ACL reconstruction. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 25:  4.   1211-1218 Apr. 

Ingrid Husdal Dørum, Stig Heir, Eirik Solheim, Liv Heide Magnussen (2017)  Implementation of conservative treatment prior to arthroscopic subacromial decompression of the shoulder. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 25:  7.  2060-2066 Jul. 

Eivind Inderhaug, Sveinung Raknes, Thomas Østvold, Eirik Solheim, Torbjørn Strand (2017)  Increased revision rate with posterior tibial tunnel placement after using the 70-degree tibial guide in ACL reconstruction. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 25:  1.   152-158 Jan. 

Anagha P Parkar, Miraude E A P M Adriaensen, Søren Vindfeld, Eirik Solheim (2017)  The Anatomic Centers of the Femoral and Tibial Insertions of the Anterior Cruciate Ligament: A Systematic Review of Imaging and Cadaveric Studies Reporting Normal Center Locations. The American journal of sports medicine 45:  9.   2180-2188 Jul. 

Inderhaug E, Stephen JM, Williams A, Amis AA. Biomechanical Comparison of Anterolateral Procedures Combined With Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2017 Feb;45(2):347-354. doi: 10.1177/0363546516681555.

Eivind Inderhaug, Allan Larsen, Torbjørn Strand, Per Arne Waaler, Eirik Solheim (2016)  The effect of feedback from post-operative 3D CT on placement of femoral tunnels in single-bundle anatomic ACL reconstruction. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 24:  1.  154-160 Jan.

Eirik Solheim, Janne Hegna, Eivind Inderhaug, Jannike Øyen, Thomas Harlem, Torbjørn Strand (2016)  Results at 10-14 years after microfracture treatment of articular cartilage defects in the knee. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 24:  5.  1587-1593 May.

Eirik Solheim, Arne Magnus Krokeide, Peder Melteig, Allan Larsen, Torbjørn Strand, Mats Brittberg (2016)  Symptoms and function in patients with articular cartilage lesions in 1,000 knee arthroscopies. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 24:  5.  1610-1616 May.

Eirik Solheim, Janne Hegna, Eivind Inderhaug (2016)  Long-term outcome after all-inside meniscal repair using the RapidLoc system. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 24:  5.  1495-1500 May.

Gunnar Knutsen, Jon Olav Drogset, Lars Engebretsen, Torbjørn Grøntvedt, Tom C Ludvigsen, Sverre Løken, Eirik Solheim, Torbjørn Strand, Oddmund Johansen (2016)  A Randomized Multicenter Trial Comparing Autologous Chondrocyte Implantation with Microfracture: Long-Term Follow-up at 14 to 15 Years. The Journal of bone and joint surgery. American volume 98:  16.  1332-1339 Aug.