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Per Wretenberg

Position: Professor School/office: School of Medical Sciences

Email: cGVyLndyZXRlbmJlcmc7b3J1LnNl

Phone: +46 19 303532

Room: X4311

Research subject

Surgical Science

About Per Wretenberg

Per Wretenberg is head of the orthopedic research team at ORU and Department of Orthopedics and Hand Surgery, Region Örebro County. He has since 2018 been supervisor of 10 PhD students at Örebro University and is still supervisor for 5 PhD students. The orthopedic research area is broad from studies on cartilage repair to back surgery.

Per Wretenberg is since 6 years head of medical student’s education in orthopedics and neurology (Tema NR) and is a member of the medical education committee.

His own research is focused on biomechanics and hip and knee arthroplasty surgery. He has contributed to the construction of one of Sweden’s largest hip and knee arthroplasty center in Sweden located in Lindesberg where much of the research is performed. Per Wretenberg is head of a project that aims for better precision during arthroplasty surgery with the use of robotic assistance and also a project that focuses on micromotion of implants that can lead to early loosening of the implant. Another innovative project is regarding early detection of loosening of implants with a technique called IMA, Implant Motion Analysis, in close collaboration with Sectra AB.

Per Wretenberg is very clinically active and performs both primary and advanced revision hip and knee arthroplasty surgery.

Active projects

Research groups

Publications

Articles in journals | Articles, reviews/surveys | Conference papers | Manuscripts |

Articles in journals

Reiser, D. , Kakar, S. , Sandberg, O. , Wretenberg, P. & Sagerfors, M. (2025). CT Motion-Analysis of Implant Loosening in Total Wrist Arthroplasty: A Pilot Study. Journal of wrist surgery. [BibTeX]
Dolk, D. C. , Hedevik, H. , Stigson, H. , Wretenberg, P. , Kvist, J. & Stalman, A. (2025). Nationwide incidence of anterior cruciate ligament reconstruction in higher-level athletes in Sweden: a cohort study from the Swedish National Knee Ligament Registry linked to six sports organisations. British Journal of Sports Medicine, 59 (7), 470-479. [BibTeX]
Holy, M. , Szigethy, L. , Wretenberg, P. , MacDowall, A. , Sigmundsson, F. G. & Joelson, A. (2025). Surgically treated degenerative cervical spine diseases in twins. European spine journal, 34 (4), 1270-1274. [BibTeX]
Reiser, D. , Fischer, P. , Pettersson, K. , Wretenberg, P. & Sagerfors, M. (2025). Total Wrist Arthroplasty With a New Design, 20 Cases With 8-Year Follow-Up. Journal of Hand Surgery-American Volume, 50 (3), 377e1-377e8. [BibTeX]
Jackwert, K. , Holmér, M. , Hallongren, M. , Asmar, T. , Wretenberg, P. & Andersson, Å. G. (2024). Agreement between Clinical Frailty Scale-scores based on information from patient interviews and Clinical Frailty Scale-scores based on information from medical records: a cross sectional study. BMC Geriatrics, 24 (1). [BibTeX]
Reiser, D. , Sagerfors, M. , Wretenberg, P. , Pettersson, K. & Fischer, P. (2024). Clinical, Radiographic, and Patient-Perceived Outcome After Radial Hemi-Wrist Arthroplasty With a New Implant: 20 Cases With 5-Year Follow-up. Hand (New York, N.Y.), 19 (5), 742-750. [BibTeX]
Wildeman, P. , Rolfson, O. , Wretenberg, P. , Nåtman, J. , Gordon, M. , Söderquist, B. & Lindgren, V. (2024). Effect of a national infection control programme in Sweden on prosthetic joint infection incidence following primary total hip arthroplasty: a cohort study. BMJ Open, 14 (4). [BibTeX]
Nerelius, F. , Sigmundsson, F. G. , Karlén, N. , Wretenberg, P. & Joelson, A. (2024). Patient-reported Outcome after Surgical Evacuation of Postoperative Spinal Epidural Hematomas at One-year Follow-up. Spine, 49 (10), 701-707. [BibTeX]
Jakobsson, H. , Möller, M. , Cao, Y. , Lundqvist, E. , Wretenberg, P. & Sagerfors, M. (2024). Socioeconomic factors associated with poor patient-reported outcomes of 17,478 patients after a distal radial fracture. Journal of Hand Surgery, European Volume. [BibTeX]
Forssten, M. P. , Mohammad Ismail, A. , Ioannidis, I. , Wretenberg, P. , Borg, T. , Cao, Y. , Ribeiro, M. A. F. & Mohseni, S. (2023). A nationwide analysis on the interaction between frailty and beta-blocker therapy in hip fracture patients. European Journal of Trauma and Emergency Surgery, 49 (3), 1485-1497. [BibTeX]
Lundqvist, E. , Olivecrona, H. , Wretenberg, P. & Sagerfors, M. (2023). CT-Based Micromotion Analysis After Locking Plate Fixation of AO Type C Distal Radius Fractures. Indian Journal of Orthopaedics, 57 (12), 2031-2039. [BibTeX]
Jakobsson, H. , Lundqvist, E. , Wretenberg, P. & Sagerfors, M. (2023). Pulp-to-palm distance after plate fixation of a distal radius fracture corresponds to functional outcome. Archives of physiotherapy, 13 (1). [BibTeX]
Forssten, M. P. , Mohammad Ismail, A. , Ioannidis, I. , Wretenberg, P. , Borg, T. , Cao, Y. , Ribeiro Jr, M. A. F. & Mohseni, S. (2023). The mortality burden of frailty in hip fracture patients: a nationwide retrospective study of cause-specific mortality. European Journal of Trauma and Emergency Surgery, 49 (3), 1467-1475. [BibTeX]
Ighani Arani, P. , Wretenberg, P. , Stenberg, E. , Ottosson, J. & W-Dahl, A. (2023). Total knee arthroplasty and bariatric surgery: change in BMI and risk of revision depending on sequence of surgery. BMC Surgery, 23 (1). [BibTeX]
Probert, N. , Blomberg, K. , Wretenberg, P. & Andersson, Å. (2023). Traditional compared to modified method of disinfection before hip fracture surgery - Experiences of nursing personnel. International Journal of Orthopaedic and Trauma Nursing, 49. [BibTeX]
Sagerfors, M. , Jakobsson, H. , Wretenberg, P. , Brus, O. & Möller, M. (2023). Treatment and outcome of AO/OTA type C distal radius fractures: 12 199 fractures from the Swedish Fracture Register. Acta Orthopaedica Belgica, 89 (2), 241-247. [BibTeX]
Bitar, C. , Moberg, I. , Krupic, F. , Wretenberg, P. , Otten, V. & Crnalic, S. (2022). 11-Year outcomes in patients with metal-on-metal ASR hip arthroplasty. Journal of Orthopaedics, 32, 98-103. [BibTeX]
Ahl, R. , Mohammad Ismail, A. , Borg, T. , Sjölin, G. , Forssten, M. P. , Cao, Y. , Wretenberg, P. & Mohseni, S. (2022). A nationwide observational cohort study of the relationship between beta-blockade and survival after hip fracture surgery. European Journal of Trauma and Emergency Surgery, 48 (2), 743-751. [BibTeX]
Sagerfors, M. , Jakobsson, H. , Thórdardóttir, Á. , Wretenberg, P. & Möller, M. (2022). Distal radius fractures in the superelderly: an observational study of 8486 cases from the Swedish fracture register. BMC Geriatrics, 22 (1). [BibTeX]
Sandberg, O. , Carlsson, S. , Harbom, E. , Cappelen, V. , Tholén, S. , Olivecrona, H. & Wretenberg, P. (2022). Inducible displacement CT increases the diagnostic accuracy of aseptic loosening in primary total hip arthroplasty. Acta Orthopaedica, 93, 831-836. [BibTeX]
Ighani Arani, P. , Wretenberg, P. & W-Dahl, A. (2022). Information and BMI limits for patients with obesity eligible for knee arthroplasty: the Swedish surgeons' perspective from a nationwide cross-sectional study. Journal of Orthopaedic Surgery and Research, 17 (1). [BibTeX]
Ighani Arani, P. , Wretenberg, P. , Ottosson, J. & W-Dahl, A. (2022). Pain, Function, and Satisfaction After Total Knee Arthroplasty, with or Without Bariatric Surgery. Obesity Surgery, 32 (4), 1164-1169. [BibTeX]
Lundqvist, E. , Fischer, P. , Wretenberg, P. , Krauss, W. & Sagerfors, M. (2022). Posttraumatic Arthritis After Combined Plating of Distal Radius Fractures AO Type C: A 7-Year Follow-up of 97 Cases. Hand (New York, N.Y.) (Sup. 1), 50S-59S. [BibTeX]
Probert, N. , Andersson, Å. , Magnuson, A. , Kjellberg, E. & Wretenberg, P. (2022). Surgical-site infection after hip fracture surgery: preoperative full-body disinfection compared to local disinfection of the surgical site-a population-based observational cohort study. European Geriatric Medicine, 13 (5), 1098-1097. [BibTeX]
Forssten, M. P. , Mohammad Ismail, A. , Sjölin, G. , Ahl, R. , Wretenberg, P. , Borg, T. & Mohseni, S. (2022). The association between the Revised Cardiac Risk Index and short-term mortality after hip fracture surgery. European Journal of Trauma and Emergency Surgery, 48 (3), 1885-1892. [BibTeX]
Burkard, T. , Holmberg, D. , Wretenberg, P. , Thorell, A. , Hügle, T. & Burden, A. M. (2022). The associations between bariatric surgery and hip or knee arthroplasty, and hip or knee osteoarthritis: Propensity score-matched cohort studies. Osteoarthritis and cartilage open, 4 (2). [BibTeX]
Forssten, M. P. , Mohammad Ismail, A. , Borg, T. , Cao, Y. , Wretenberg, P. , Bass, G. A. & Mohseni, S. (2022). The consequences of out-of-hours hip fracture surgery: insights from a retrospective nationwide study. European Journal of Trauma and Emergency Surgery, 48 (2), 709-719. [BibTeX]
Mohammad Ismail, A. , Ahl, R. , Forssten, M. P. , Cao, Y. , Wretenberg, P. , Borg, T. & Mohseni, S. (2022). The interaction between pre-admission β-blocker therapy, the Revised Cardiac Risk Index, and mortality in geriatric hip fracture patients. Journal of Trauma and Acute Care Surgery, 92 (1), 49-56. [BibTeX]
Lundqvist, E. , Fischer, P. , Wretenberg, P. , Pettersson, K. , Lopez Personat, A. & Sagerfors, M. (2022). Volar Locking Plate Compared With Combined Plating of AO Type C Distal Radius Fractures: A Randomized Controlled Study of 150 Cases. Journal of Hand Surgery-American Volume, 47 (9), 813-822. [BibTeX]
Ighani Arani, P. , Wretenberg, P. , Ottosson, J. , Robertsson, O. & W-Dahl, A. (2021). Bariatric surgery prior to total knee arthroplasty is not associated with lower risk of revision: a register-based study of 441 patients. Acta Orthopaedica, 92 (1), 97-101. [BibTeX]
Mohammad Ismail, A. , Ahl, R. , Forssten, M. P. , Cao, Y. , Wretenberg, P. , Borg, T. & Mohseni, S. (2021). Beta-Blocker Therapy Is Associated With Increased 1-Year Survival After Hip Fracture Surgery: A Retrospective Cohort Study. Anesthesia and Analgesia, 133 (5), 1225-1234. [BibTeX]
Joelson, A. , Danielson, B. I. , Hedlund, R. , Wretenberg, P. & Frennered, K. (2021). Clinical appearance and reliability in visual assessment after in situ fusion for high-grade isthmic spondylolisthesis. Spine deformity, 9 (1), 155-160. [BibTeX]
Pantzar, E. , Wretenberg, P. & Riad, J. (2021). Knee flexion contracture impacts functional mobility in children with cerebral palsy with various degree of involvement: a cross-sectional register study of 2,838 individuals. Acta Orthopaedica, 92 (4), 472-478. [BibTeX]
Bitar, C. , Krupic, F. , Felländer-Tsai, L. , Crnalic, S. & Wretenberg, P. (2021). Living with a recalled implant: a qualitative study of patients' experiences with ASR hip resurfacing arthroplasty. Patient Safety in Surgery, 15 (1). [BibTeX]
Ivarsson, M. , Prenkert, M. , Cheema, A. , Wretenberg, P. & Andjelkov, N. (2021). Mussel Adhesive Protein as a Promising Alternative to Fibrin for Scaffold Fixation during Cartilage Repair Surgery. Cartilage, 13 (Suppl. 2), 663S-671S. [BibTeX]
Eldh, A. C. , Joelsson-Alm, E. , Wretenberg, P. & Hälleberg Nyman, M. (2021). Onset PrevenTIon of urinary retention in Orthopaedic Nursing and rehabilitation, OPTION-a study protocol for a randomised trial by a multi-professional facilitator team and their first-line managers' implementation strategy. Implementation Science, 16 (1). [BibTeX]
Forssten, M. P. , Mohammad Ismail, A. , Borg, T. , Ahl, R. , Wretenberg, P. , Cao, Y. , Peden, C. J. & Mohseni, S. (2021). Postoperative mortality in hip fracture patients stratified by the Revised Cardiac Risk Index: a Swedish nationwide retrospective cohort study. Trauma surgery & acute care open, 6 (1). [BibTeX]
Mahdi, A. , Hälleberg Nyman, M. & Wretenberg, P. (2021). Reduction in anxiety and depression symptoms one year after knee replacement: a register-based cohort study of 403 patients. European Journal of Orthopaedic Surgery & Traumatology, 31 (6), 1215-1224. [BibTeX]
Andjelkov, N. , Riyadh, H. , Ivarsson, M. , Kacarevic-Popovic, Z. , Krstic, J. & Wretenberg, P. (2021). The enhancement of cartilage regeneration by use of a chitosan-based scaffold in a 3D model of microfracture in vitro: a pilot evaluation. Journal of experimental orthopaedics, 8 (1). [BibTeX]
Wildeman, P. , Rolfson, O. , Söderquist, B. , Wretenberg, P. & Lindgren, V. (2021). What Are the Long-term Outcomes of Mortality, Quality of Life, and Hip Function after Prosthetic Joint Infection of the Hip? A 10-year Follow-up from Sweden. Clinical Orthopaedics and Related Research, 479 (10), 2203-2213. [BibTeX]
Probert, N. , Lööv, A. , Akner, G. , Wretenberg, P. & Andersson, Å. (2020). A Comparison of Patients with Hip Fracture, Ten Years Apart: Morbidity, Malnutrition and Sarcopenia. The Journal of Nutrition, Health & Aging, 24 (8), 870-877. [BibTeX]
Joelson, A. , Danielson, B. I. , Hedlund, R. , Wretenberg, P. & Frennered, K. (2020). Adjacent segment disk degeneration three decades after fusion without attempted reduction for high-grade isthmic spondylolisthesis. Spine deformity, 8 (4), 743-750. [BibTeX]
Karlsson, E. , Wretenberg, P. , Björling, P. & Sagerfors, M. (2020). Combined volar and dorsal plating vs. volar plating of distal radius fractures: A single-center study of 105 cases. Hand surgery & rehabilitation, 39 (6), 516-521. [BibTeX]
Mahdi, A. , Svantesson, M. , Wretenberg, P. & Hälleberg Nyman, M. (2020). Patients’ experiences of discontentment one year after total knee arthroplasty: a qualitative study. BMC Musculoskeletal Disorders, 21 (1). [BibTeX]
Mahdi, A. , Hälleberg Nyman, M. & Wretenberg, P. (2020). Preoperative psychological distress no reason to delay total knee arthroplasty: a register‑based prospective cohort study of 458 patients. Archives of Orthopaedic and Trauma Surgery, 140 (11), 1809-1818. [BibTeX]
Sandberg, O. , Tholén, S. , Carlsson, S. & Wretenberg, P. (2020). The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients. Acta Orthopaedica, 91 (6), 654-659. [BibTeX]
Mohammad Ismail, A. , Borg, T. , Sjölin, G. , Pourlotfi, A. , Holm, S. , Cao, Y. , Wretenberg, P. , Ahl, R. & et al. (2020). β-adrenergic blockade is associated with a reduced risk of 90-day mortality after surgery for hip fractures. Trauma surgery & acute care open, 5 (1). [BibTeX]
Edvinsson, M. , Welvaart, N. , Ryttberg, L. , Wretenberg, P. , Vikerfors, T. & Nyström-Rosander, C. (2019). No evidence of Chlamydia pneumoniae in the synovia of patients with osteoarthritis. Journal of international medical research, 47 (2), 635-640. [BibTeX]
Riyadh, H. , Andjelkov, N. & Wretenberg, P. (2019). Parameters identifying the risk of treatment failure after cartilage repair: a proposed treatment algorithm and pilot study. Current Opinion in Orthopaedics, 30 (4), 327-331. [BibTeX]
Joelson, A. , Diarbakerli, E. , Gerdhem, P. , Hedlund, R. , Wretenberg, P. & Frennered, K. (2019). Self-Image and Health-Related Quality of Life Three Decades After Fusion In Situ for High-Grade Isthmic Spondylolisthesis. Spine deformity, 7 (2), 293-297. [BibTeX]
Mahdi, A. , Hälleberg Nyman, M. & Wretenberg, P. (2018). How do orthopaedic surgeons inform their patients before knee arthroplasty surgery?: A cross-sectional study. BMC Musculoskeletal Disorders, 19. [BibTeX]
Andjelkov, N. , Riyadh, H. & Wretenberg, P. (2018). Neuralgic and Nociceptive Pain in the Knee as a Cause of the Treatment Failure after Cartilage Repair Surgery: Two Case Reports. Journal of Pain & Relief, 7 (4). [BibTeX]
Joelson, A. , Danielson, B. I. , Hedlund, R. , Wretenberg, P. & Frennered, K. (2018). Sagittal Balance and Health-Related Quality of Life Three Decades After in Situ Arthrodesis for High-Grade Isthmic Spondylolisthesis. Journal of Bone and Joint Surgery. American volume, 100 (16), 1357-1365. [BibTeX]
Naili, J. E. , Wretenberg, P. , Lindgren, V. , Iversen, M. D. , Hedström, M. & Broström, E. W. (2017). Improved knee biomechanics among patients reporting a good outcome in knee-related quality of life one year after total knee arthroplasty. BMC Musculoskeletal Disorders, 18. [BibTeX]
Martinez-Murillo, P. , Pramanik, L. , Sundling, C. , Hultenby, K. , Wretenberg, P. , Spångberg, M. & Karlsson Hedestam, G. B. (2016). CD138 and CD31 Double-Positive Cells Comprise the Functional Antibody-Secreting Plasma Cell Compartment in Primate Bone Marrow. Frontiers in Immunology, 7. [BibTeX]
Ågren, P. , Tullberg, T. , Mukka, S. , Wretenberg, P. & Sayed-Noor, A. S. (2015). Post-traumatic in situ fusion after calcaneal fractures: a retrospective study with 7-28 years follow-up. Foot and Ankle Surgery, 21 (1), 56-59. [BibTeX]
Ågren, P. , Mukka, S. , Tullberg, T. , Wretenberg, P. & Sayed-Noor, A. S. (2014). Factors affecting long-term treatment results of displaced intraarticular calcaneal fractures: a post hoc analysis of a prospective, randomized, controlled multicenter trial. Journal of Orthopaedic Trauma, 28 (10), 564-568. [BibTeX]
Lindgren, J. V. , Wretenberg, P. , Kärrholm, J. , Garellick, G. & Rolfson, O. (2014). Patient-reported outcome is influenced by surgical approach in total hip replacement: a study of the Swedish Hip Arthroplasty Register including 42,233 patients. The Bone & Joint Journal, 96-B (5), 590-596. [BibTeX]
Esbjörnsson, A. , Rozumalski, A. , Iversen, M. D. , Schwartz, M. H. , Wretenberg, P. & Broström, E. W. (2014). Quantifying gait deviations in individuals with rheumatoid arthritis using the Gait Deviation Index. Scandinavian Journal of Rheumatology, 43 (2), 124-131. [BibTeX]
Broström, E. W. , Esbjörnsson, A. , von Heideken, J. , Larsson, P. , Wretenberg, P. & Iversen, M. (2013). Change in Gait Deviation Index after anti-tumour necrosis factor-α treatment in individuals with rheumatoid arthritis: a pilot study. Scandinavian Journal of Rheumatology, 42 (5), 356-361. [BibTeX]
Thur, C. K. , Edgren, G. , Jansson, K. & Wretenberg, P. (2012). Epidemiology of adult ankle fractures in Sweden between 1987 and 2004: a population-based study of 91,410 Swedish inpatients. Acta Orthopaedica, 83 (3), 276-281. [BibTeX]
Sayed-Noor, A. S. , Agren, P. & Wretenberg, P. (2011). Interobserver reliability and intraobserver reproducibility of three radiological classification systems for intra-articular calcaneal fractures. Foot & ankle international, 32 (9), 861-866. [BibTeX]
Affas, F. , Nygårds, E. , Stiller, C. , Wretenberg, P. & Olofsson, C. (2011). Pain control after total knee arthroplasty: a randomized trial comparing local infiltration anesthesia and continuous femoral block. Acta Orthopaedica, 82 (4), 441-447. [BibTeX]
Wang, R. , Thur, C. K. , Gutierrez-Farewik, E. M. , Wretenberg, P. & Broström, E. (2010). One year follow-up after operative ankle fractures: a prospective gait analysis study with a multi-segment foot model. Gait & Posture, 31 (2), 234-240. [BibTeX]
Sayed-Noor, A. S. , Pedersen, E. , Wretenberg, P. & Sjödén, G. O. (2009). Distal lengthening of ilio-tibial band by Z-plasty for treating refractory greater trochanteric pain after total hip arthroplasty (Pedersen-Noor operation). Archives of Orthopaedic and Trauma Surgery, 129 (5), 597-602. [BibTeX]
Sayed-Noor, A. S. , Hugo, A. , Sjödén, G. O. & Wretenberg, P. (2009). Leg length discrepancy in total hip arthroplasty: comparison of two methods of measurement. International Orthopaedics, 33 (5), 1189-1193. [BibTeX]
Weiss, R. J. , Ehlin, A. , Montgomery, S. M. , Wick, M. C. , Stark, A. & Wretenberg, P. (2008). Decrease of RA-related orthopaedic surgery of the upper limbs between 1998 and 2004: data from 54,579 Swedish RA inpatients. Rheumatology, 47 (4), 491-494. [BibTeX]
Weiss, R. J. , Wretenberg, P. , Stark, A. , Palmblad, K. , Larsson, P. , Gröndal, L. & Broström, E. (2008). Gait pattern in rheumatoid arthritis. Gait & Posture, 28 (2), 229-234. [BibTeX]
Wretenberg, P. (2008). Good function but very high concentrations of cobalt and chromium ions in blood 37 years after metal-on-metal total hip arthroplasy. Medical Devices: Evidence and Research, 1, 31-32. [BibTeX]
Wretenberg, P. , Hugo, A. & Broström, E. (2008). Hip joint load in relation to leg length discrepancy. Medical Devices: Evidence and Research, 1, 13-18. [BibTeX]
Sayed-Noor, A. S. , Englund, E. , Wretenberg, P. & Sjödén, G. O. (2008). Pressure-pain threshold algometric measurement in patients with greater trochanteric pain after total hip arthroplasty. The Clinical Journal of Pain, 24 (3), 232-236. [BibTeX]
Grondal, L. , Tengstrand, B. , Nordmark, B. , Wretenberg, P. & Stark, A. (2008). The foot: still the most important reason for walking incapacity in rheumatoid arthritis - Distribution of symptomatic joints in 1,000 RA patients. Acta Orthopaedica, 79 (2), 257-261. [BibTeX]
Weiss, R. J. , Broström, E. , Stark, A. , Wick, M. C. & Wretenberg, P. (2007). Ankle/hindfoot arthrodesis in rheumatoid arthritis improves kinematics and kinetics of the knee and hip: a prospective gait analysis study. Rheumatology, 46 (6), 1024-1028. [BibTeX]
Benoit, D. L. , Ramsey, D. K. , Lamontagne, M. , Xu, L. , Wretenberg, P. & Renström, P. (2007). In vivo knee kinematics during gait reveals new rotation profiles and smaller translations. Clinical Orthopaedics and Related Research, 454, 81-88. [BibTeX]
Grondal, L. , Broström, E. , Wretenberg, P. & Stark, A. (2006). Arthrodesis versus Mayo resection: the management of the first metatarsophalangeal joint in reconstruction of the rheumatoid forefoot. Journal of Bone and Joint Surgery, 88B (7), 914-919. [BibTeX]
Benoit, D. L. , Ramsey, D. K. , Lamontagne, M. , Xu, L. , Wretenberg, P. & Renström, P. (2006). Effect of skin movement artifact on knee kinematics during gait and cutting motions measured in vivo. Gait & Posture, 24 (2), 152-164. [BibTeX]
Weiss, R. J. , Stark, A. , Wick, M. C. , Ehlin, A. , Palmblad, K. & Wretenberg, P. (2006). Orthopaedic surgery of the lower limbs in 49,802 rheumatoid arthritis patients: results from the Swedish National Inpatient Registry during 1987 to 2001. Annals of the Rheumatic Diseases, 65 (3), 335-341. [BibTeX]
Wretenberg, P. , Ericson, A. & Stark, A. (2006). Radial head prosthesis after fracture of radial head with associated elbow instability. Archives of Orthopaedic and Trauma Surgery, 126 (3), 145-149. [BibTeX]
Krämer, D. K. , Al-Khalili, L. , Perrini, S. , Skogsberg, J. , Wretenberg, P. , Kannisto, K. , Wallberg-Henriksson, H. , Ehrenborg, E. & et al. (2005). Direct activation of glucose transport in primary human myotubes after activation of peroxisome proliferator-activated receptor delta. Diabetes, 54 (4), 1157-1163. [BibTeX]
Al-Khalili, L. , Krämer, D. , Wretenberg, P. & Krook, A. (2004). Human skeletal muscle cell differentiation is associated with changes in myogenic markers and enhanced insulin-mediated MAPK and PKB phosphorylation. Acta Physiologica Scandinavica, 180 (4), 395-403. [BibTeX]
Ramsey, D. K. , Wretenberg, P. , Lamontagne, M. & Németh, G. (2003). Electromyographic and biomechanic analysis of anterior cruciate ligament deficiency and functional knee bracing. Clinical Biomechanics, 18 (1), 28-34. [BibTeX]
Ramsey, D. K. , Wretenberg, P. , Benoit, D. L. , Lamontagne, M. & Németh, G. (2003). Methodological concerns using intra-cortical pins to measure tibiofemoral kinematics. Knee Surgery, Sports Traumatology, Arthroscopy, 11 (5), 344-349. [BibTeX]
Ericson, A. , Arndt, A. , Stark, A. , Wretenberg, P. & Lundberg, A. (2003). Variation in the position and orientation of the elbow flexion axis. Journal of Bone and Joint Surgery, 85B (4), 538-544. [BibTeX]
Svedmark, P. , Wretenberg, P. & Stark, A. (2002). Broken wings: common with the Hardinger plug. Acta Orthopaedica Scandinavica, 73 (4), 407-408. [BibTeX]
Wretenberg, P. , Ramsey, D. K. & Németh, G. (2002). Tibiofemoral contact points relative to flexion angle measured with MRI. Clinical Biomechanics, 17 (6), 477-485. [BibTeX]
Weidenhielm, L. R. , Mikhail, W. E. , Wretenberg, P. , Fow, J. , Simpson, J. & Bauer, T. W. (2001). Analysis of the retrieved hip after revision with impaction grafting. Acta Orthopaedica Scandinavica, 72 (6), 609-614. [BibTeX]
Ramsey, D. K. , Lamontagne, M. , Wretenberg, P. , Valentin, A. , Engström, B. & Németh, G. (2001). Assessment of functional knee bracing: an in vivo three-dimensional kinematic analysis of the anterior cruciate deficient knee. Clinical Biomechanics, 16 (1), 61-70. [BibTeX]
Mikhail, W. E. , Wretenberg, P. , Weidenhielm, L. R. & Mikhail, M. N. (1999). Complex cemented revision using polished stem and morselized allograft. Minimum 5-years' follow-up. Archives of Orthopaedic and Trauma Surgery, 119 (5-6), 288-291. [BibTeX]
Feng, Y. , Grooten, W. , Wretenberg, P. & Arborelius, U. P. (1999). Effects of arm suspension in simulated assembly line work: muscular activity and posture angles. Applied Ergonomics, 30 (3), 247-253. [BibTeX]
Mikhail, W. E. , Weidenhielm, L. R. , Wretenberg, P. , Mikhail, N. & Bauer, T. W. (1999). Femoral bone regeneration subsequent to impaction grafting during hip revision: histologic analysis of a human biopsy specimen. The Journal of Arthroplasty, 14 (7), 849-953. [BibTeX]
Wretenberg, P. & Ekelund, A. (1997). Acute hemiarthroplasty after proximal humerus fracture in old patients. A retrospective evaluation of 18 patients followed for 2-7 years. Acta Orthopaedica Scandinavica, 68 (2), 121-123. [BibTeX]
Feng, Y. , Grooten, W. , Wretenberg, P. & Arborelius, U. P. (1997). Effects of arm support on shoulder and arm muscle activity during sedentary work. Ergonomics, 40 (8), 834-848. [BibTeX]
Wretenberg, P. , Feng, Y. & Arborelius, U. P. (1996). High- and low-bar squatting techniques during weight-training. Medicine & Science in Sports & Exercise, 28 (2), 218-224. [BibTeX]
Wretenberg, P. , Németh, G. , Lamontagne, M. & Lundin, B. (1996). Passive knee muscle moment arms measured in vivo with MRI. Clinical Biomechanics, 11 (8), 439-446. [BibTeX]
Wretenberg, P. & Arborelius, U. P. (1994). Power and work produced in different leg muscle groups when rising from a chair. European Journal of Applied Physiology and Occupational Physiology, 68 (5), 413-417. [BibTeX]
Wretenberg, P. , Lindberg, F. & Arborelius, U. P. (1993). Effect of armrests and different ways of using them on hip and knee load during rising. Clinical Biomechanics, 8 (2), 95-101. [BibTeX]
Wretenberg, P. , Arborelius, U. P. , Weidenhielm, L. & Lindberg, F. (1993). Rising from a chair by a spring-loaded flap seat: a biomechanical analysis. Scandinavian Journal of Rehabilitation Medicine, 25 (4), 153-159. [BibTeX]
Wretenberg, P. , Arborelius, U. P. & Lindberg, F. (1993). The effects of a pneumatic stool and a one-legged stool on lower limb joint load and muscular activity during sitting and rising. Ergonomics, 36 (5), 519-535. [BibTeX]
Arborelius, U. P. , Wretenberg, P. & Lindberg, F. (1992). The effects of armrests and high seat heights on lower-limb joint load and muscular activity during sitting and rising. Ergonomics, 35 (11), 1377-1391. [BibTeX]

Articles, reviews/surveys

Ramsey, D. K. & Wretenberg, P. (1999). Biomechanics of the knee: methodological considerations in the in vivo kinematic analysis of the tibiofemoral and patellofemoral joint. Clinical Biomechanics, 14 (9), 595-611. [BibTeX]

Conference papers

Lundqvist, E. , Olivecrona, H. , Wretenberg, P. & Sagerfors, M. (2023). CT-based micromotion analysis of fracture fragment migration after locking plate fixation of AO type C distal radius fractures. In: FESSH-EFSHT 2023 Congress Abstract Book. Paper presented at FESSH-EFSHT 2023 Congress, Rimini, Italy, 10-13 May, 2023. (pp. 22-23). [BibTeX]
Sagerfors, M. , Jakobsson, H. & Wretenberg, P. (2022). Distal Radius Fracture AO type C, Treatment and Outcome. An Observational Study of 12,199 Fractures from the National Swedish Fracture Register. In: AAHS 2022 American Association of Hand Surgery. Paper presented at AAHS 2022 American Association of Hand Surgery, San Diego, USA, January 11-15, 2022. [BibTeX]
Sagerfors, M. , Jakobsson, H. , Thórdardóttir, Á. , Wretenberg, P. & Möller, M. (2022). Distal radius fractures in the superelderly: an observational study of 8486 cases from the Swedish fracture register. Paper presented at Scandinavian Society for Surgery of the Hand, SSSH 2022, Malmö, Sweden, 24-26 aug., 2022. [BibTeX]

Manuscripts

Lundqvist, E. , Olivecrona, H. , Wretenberg, P. & Sagerfors, M. CT-based micromotion analysis of fracture fragment migration after locking plate fixation of AO type C distal radius fractures. [BibTeX]
Wildeman, P. , Rolfson, O. , Wretenberg, P. , Gordon, M. , Söderquist, B. & Lindgren, V. National infection control program has no effect on postoperative infections after total hip arthroplasty. [BibTeX]
Mahdi, A. , Hälleberg Nyman, M. & Wretenberg, P. Reduction in anxiety and depression symptoms one year after knee replacement : a register-based cohort study of 403 patients. [BibTeX]
Holy, M. , Joelson, A. , MacDowall, A. , Sigmundsson, F. G. , Wretenberg, P. & Olerud, C. Örebro Multicentre Study on Operative Treatmentof Cervical Radiculopathy : Interim analysis. [BibTeX]