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Per Wretenberg

Title: Professor School/office: School of Medical Sciences


Phone: +46 19 303532

Room: C4220

Per Wretenberg
Research subject

About Per Wretenberg

Per Wretenberg is head of the orthopedic research team at ORU and Department of Orthopedics Region Örebro County. He is supervisor of many PhD students in orthopedics. The orthopedic research area is broad from studies on cartilage repair to back surgery.

Per Wretenberg has been head of medical student’s education in orthopedics and neurology for 4 years and is still a member of the education group.

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 (navigation) and also a project that focuses on evaluation of implant function in the body. The research is done in close collaboration with the industry.

Per Wretenberg is very clinicaly active and performes both primary and advanced revision hip and knee arthroplasty surgery.






Articles in journals |  Manuscripts | 

Articles in journals

Ahl, R. , Mohammad Ismail, A. , Borg, T. , Sjölin, G. , Forssten, M. P. , Cao, Y. , Wretenberg, P. & Mohseni, S. (2021). A nationwide observational cohort study of the relationship between beta-blockade and survival after hip fracture surgery. European Journal of Trauma and Emergency Surgery.
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.
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.
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).
Forssten, M. P. , Mahdi, 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).
Lundqvist, E. , Fischer, P. , Wretenberg, P. , Krauss, W. & Sagerfors, M. (2021). 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.).
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.
Forssten, M. P. , Mohammad Ismail, A. , Borg, T. , Cao, Y. , Wretenberg, P. , Bass, G. A. & Mohseni, S. (2021). The consequences of out-of-hours hip fracture surgery: insights from a retrospective nationwide study. European Journal of Trauma and Emergency Surgery.
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).
Mohammad Ismail, A. , Ahl, R. , Forssten, M. P. , Cao, Y. , Wretenberg, P. , Borg, T. & Mohseni, S. (2021). The Interaction Between Per-admission β-Blocker Therapy, The Revised Cardiac Risk Index, and Mortality in Geriatric Hip Fracture Patients. Journal of Trauma and Acute Care Surgery.
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.
Probert, N. , Lööw, 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.
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.
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).
Forssten, M. P. , Mohammad Ismail, A. , Sjölin, G. , Ahl, R. , Wretenberg, P. , Borg, T. & Mohseni, S. (2020). The association between the Revised Cardiac Risk Index and short-term mortality after hip fracture surgery. European Journal of Trauma and Emergency Surgery.
Ivarsson, M. , Prenkert, M. , Cheema, A. , Wretenberg, P. & Andjelkov, N. (2019). Mussel Adhesive Protein as a Promising Alternative to Fibrin for Scaffold Fixation during Cartilage Repair Surgery. Cartilage.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Wretenberg, P. , Hugo, A. & Broström, E. (2008). Hip joint load in relation to leg length discrepancy. Medical Devices: Evidence and Research, 1, 13-18.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Svedmark, P. , Wretenberg, P. & Stark, A. (2002). Broken wings: common with the Hardinger plug. Acta Orthopaedica Scandinavica, 73 (4), 407-408.
Wretenberg, P. , Ramsey, D. K. & Németh, G. (2002). Tibiofemoral contact points relative to flexion angle measured with MRI. Clinical Biomechanics, 17 (6), 477-485.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.


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.