Accepted peer-reviewed Articles (2018 – October 2023)

    

    

   [1] 2018 Journal of Orthopaedic Research

   Wunderli LW, Widmer J, Amrein N, Foolen J, Silvan U, Leupin O, Snedeker JG

   “Minimal mechanical load and tissue culture conditions preserve native cell phenotype and morphology in tendon—a novel ex vivo mouse explant model”

    

   [2] 2018 Plos One

   Scheibler AG*, Götschi T*, Widmer J, Holenstein C, Steffen T, Camenzind RS, Snedeker JG, Farshad M

   “Feasibility of the annulus fibrosus repair with in situ gelating hydrogels – A biomechanical study”

        

   [3] 2018 At-Automatisierungstechnik

   Bernal LM, Schmidt IT, Vulin N, Widmer J, Snedeker JG, Cattin PC, Zam A, Rauter G

   “Optimizing controlled laser cutting of hard tissue (bone)”

    

       [4] 2019 Annals of Biomedical Engineering

   Widmer J, Fornaciari P, Senteler M, Roth T, Snedeker JG, Farshad M

   “Kinematics of the Spine under Healthy and Degenerative Conditions: A Systematic Review”

    

       [5] 2019 Journal of Biomechanics

   Cornaz F, Fasser FM, Spirig JM, Snedeker JG, Farshad M, Widmer J

   “3D printed clamps improve spine specimen fixation in biomechanical testing”

    

   [6] 2020 Computer Methods in Biomechanics and Biomedical Engineering

   Widmer J*, Fasser MR*, Croci E, Spirig JM, Snedeker JG, Farshad M

   “Individualized prediction of pedicle screw fixation strength with a finite element model”

    

       [7] 2020 Biomaterials

   Schönenberger AD, Tempfer H, Lehner C, Egloff J, Mauracher M, Bird A, Widmer J, Maniura K, Fucantese SF, Traweger A, Silvan U, Snedeker JG

   “Macromechanics and polycaprolactone fiber organization drive macrophage polarization and regulate inflammatory activation of tendon in vitro and in vivo”

    

       [8] 2020 The Spine Journal

   Widmer J*, Cornaz F*, Scheibler AG, Spirig JM, Snedeker JG, Farshad M

   “Biomechanical contribution of spinal structures to stability of the lumbar spine-novel biomechanical insights”

    

       [9] 2020 European Spine Journal

   Cornaz F*, Widmer J*, Scheibler AG, Snedeker JS, Spirig JM, Farshad M

   “Cross-links in posterior pedicle screw-rod instrumentation of the spine: a systematic review on mechanical, biomechanical, numerical and clinical studies”
    

    

   [10] 2021 Journal of Biomechanics

   Götschi T*, Widmer J*, Cornaz F, Kimenai J, Spirig JM, Snedeker JG**, Farshad M**

   “Region- and degeneration dependent stiffness distribution in intervertebral discs derived by shear wave elastography”

    

   [11] 2021 Plos One

   Cornaz F*, Widmer J*, Fasser MR, Snedeker JG, Matzukawa K, Spirig JM, Farshad M

   “Is a cross-connector beneficial for single level traditional or cortical bone trajectory pedicle screw instrumentation?”

    

   [12] 2021 BMC Musculoskeletal Disorders

   Farshad M, Frey A, Jentzsch T, Betz M, Widmer J, Spirig JM

   “Reducing the kyphosis effect of anterior extreme short lumbar scoliosis correction with autograft lever fulcrum effect?”

    

   [13] 2021 The Spine

   Cornaz F*, Widmer J*, Farshad-Amacker N, Spirig JM, Snedeker JG, Farshad M

   “Biomechanical contributions of spinal structures with different degrees of disc degeneration”

    

   [14] 2021 European Spine Journal

   Spirig JG*, Winkler E*, Cornaz F, Fasser MR, Betz M, Snedeker JG, Widmer J**, Farshad M**

   “Biomechanical performance of bicortical versus pericortical cortical bone trajectory (cbt) pedicle screws”

    

   [15] 2021 Journal of Biomechanics

   Cornaz F, Fasser MR, Spirig JM, Snedeker JG, Farshad M, Widmer J

   “3D printed clamps for fixation of spinal segments in biomechanical testing.”

    

   [16] 2021 The Spine Journal

   Cornaz F, Widmer J, Farshad-Amacker N, Spirig J, Snedeker JG, Farshad M

   “Intervertebral disc degeneration relates to biomechanical changes of spinal ligaments”

    

   [17] 2021 Clinical Biomechanics

   Roth T, Rahm S, Jungwirth A, Weinberger, Süess J, Sutter R, Schellenberg F, Taylor WR, Snedeker JG, Widmer J*, Zingg P*

   “Restoring range of motion in reduced acetabular version by

   Increasing femoral antetorsion – what about joint load?”

    

   [18] 2021 Computer methods in biomechanics and biomedical engineering

   Caprara S, Fasser MR, Spirig JM, Widmer J, Snedeker JG, Farshad M, Senteler M

   “Bone density optimized pedicle screw instrumentation improves screw pull-out force in lumbar vertebrae”

    

   [19] 2021 Journal of Biomechanics

   Widmer J, Cornaz F, Farshad-Amacker N, Snedeker JG, Spirig JM, Farshad M

   “Hydrostatic integrity of the intervertebral disc assessed by MRI”

    

   [20] 2021 Frontiers in Bioengineering and Biotechnology

   Fasser MR, Jokeit M, Kalthoff M, Romero D, Trache T, Snedeker JG, Farshad M, Widmer J

   “Subject-Specific Alignment and Mass Distribution in Musculoskeletal

   Models of the Lumbar Spine”

    

   [21] 2021 North American Spine Society Journal

   Burkhard M, Cornaz F, Spirig JM, Wanivenhaus F, Loucas R, Fasser MR, Widmer J, Farshad M

   “Posterior spinal instrumentation and decompression with or without cross-link?”

    

   [22] 2022 North American Spine Society Journal

   Tsagkaris C, Widmer J, Wanivenhaus F, Redaelli A, Lamartina C, Farshad M

   “The Sitting Vs Standing Spine”

    

   [23] 2022 European Spine Journal

   Fasser MR, Gerber G, Passplan C, Cornaz F, Snedeker JG, Farshad M, Widmer J

   “Computational model predicts risk of spinal screw loosening in patients”

    

   [24] 2022 Scientific Reports

   Cornaz F, Fasser MR, Snedeker JG, Spirig JM, Farshad M, Widmer J

   “The biomechanical fundamentals of crosslink-augmentation in posterior spinal instrumentation”

    

   [25] 2022 Medical Imaging with Deep Learning

   Jokeit M, Kim JH, Snedeker JG, Farshad M, Widmer J

   “Mesh-based 3D Reconstruction from Bi-planar Radiographs”

    

   [26] 2022 European Spine Journal

   Cornaz F, Haupt S, Farshad M, Widmer J

   “Real-time assessment of anteroposterior stability of spinal segments”

    

   [27] 2022 The Spine Journal

   Farshad M, Cornaz F, Spirig JM, Sutter R, Farshad-Amacker NA, Widmer J

   “Spondylophyte classification based on biomechanical effects on

   segmental stiffness”

    

   [28] 2022 Frontiers in Bioengineering and Biotechnology

   Cornaz F, Farshad M, Widmer J

   “Location of pedicle screw hold in relation to bone quality and loads”

    

   [29] 2022 The Spine Journal

   Haupt S, Cornaz F, Falkowski A, Widmer J, Farshad M

   “Biomechanical considerations of the posterior surgical approach to the lumbar spine”

    

   [30] 2022 The Spine Journal

   Farshad M*, Hagel V*, Spirig JM, Fasser MR, Burkhard MD, Widmer J, Calek AK

   “Biomechanics of transforaminal endoscopic approaches”

    

   [31] 2022 Annals of Biomedical Engineering

   Lindenmann S, Tsagkaris C, Farshad M, Widmer J

   “Kinematics of the Cervical Spine under Healthy and Degenerative Conditions: A Systematic Review”

    

   [32] 2022 Computer Methods and Programs in Biomedicine Update

   Fasser RM, Kuravi R, Bulla M, Snedeker JG, Farshad M, Widmer J

   “A deep learning pipeline for automatized assessment of spinal MRI”

    

   [33] 2022 Frontiers in Bioengineering and Biotechnology

   Fasser RM, Kuravi R, Bulla M, Snedeker JG, Farshad M, Widmer J

   “A Novel Approach for Tetrahedral-Element-Based Finite Element Simulations of Anisotropic Hyperelastic Intervertebral Disc Behavior”

    

   [34] 2022 Frontiers in Bioengineering and Biotechnology

   Widmer J, Aubin CE, Van Lenthe GH, Matsukawa K

   “Editorial: Innovations to improve screw fixation in traumatology and orthopedic surgery”

    

   [35] 2022 JOR Spine

   Heggli I, Laux C, Mengis T, Karol, AA, Cornaz F, Herger N., Aradi-Vegh B, Widmer J, Burkhard M, Farshad-Amacker NA, Pfammmatter S, Wolski W, Brunner F, Distler O, Farshad M, Dudli S

   “Modic Type 2 Changes are Fibroinflammatory Changes with Complement System Involvement Adjacent To Degenerated Vertebral Endplates”

    

   [36] 2022 Surgical Innovation

   Tsagkaris C, Kalahanis, Widmer J, Farshad M

   “Spine Biomechanics In The Work Of Aristotle (384 – 322 BC)”

    

   [37] 2023 European Spine Journal

   Burkhard MD, Spirig JM, Wanivenhaus F, Cornaz F, Fasser MR, Widmer J, Farshad M

   “Residual motion of different posterior instrumentation and interbody fusion constructs”

    

   [38] 2023 European Spine Journal

   Burkhard MD, Cornaz F, Spirig JM, Wanivenhaus F, Fasser MR, Widmer J, Farshad M

   “Residual motion of cortical versus pedicle screw constructs after decompression, interbody fusion and cross-link augmentation”

    

   [39] 2023 The Spine Journal

   Calek AK, C, Tsagkaris C, Fasser MR, Widmer J, Hagel V, Farshad M

   “Biomechanical limitations of partial pediculectomy in endoscopic spine surgery”

    

   [40] 2023 European Spine Journal

   Farshad M, Tsagkaris C, Widmer J, Fasser MR, Cornaz F, Calek AK

   “Vertebropexy as a semi-rigid ligamentous alternative to lumbar spinal fusion”

    

   [41] 2023 European Spine Journal

   Burkhard MD, Calek AK, Fasser MR, Cornaz F, Widmer J, Spirig JM, Wanivenhaus F, Farshad M

   “Biomechanics after spinal decompression and posterior instrumentation”

    

   [42] 2023 Journal of Biomechanics

   Haupt S, Cornaz F, Falkowski A, Farshad M, Widmer J

   “The biomechanical consequence of posterior interventions at the thoracolumbar spine on the passively stabilized flexed posture”

    

   [43] 2023 European Spine Journal

   Calek AK, C, Altdorfer F, Fasser MR, Widmer J, Farshad M

   Interspinous and spinolaminar synthetic vertebropexy of the lumbar spine”

    

   [44] 2023 The Spine Journal

   Calek AK, C, Fasser MR, Widmer J, Farshad M

   “Lumbar vertebropexy after unilateral total facetectomy”

    

   [45] 2023 Frontiers in Bioengineering and Biotechnology

   Tsagkaris C, Calek AK, Fasser MR, Spirig JM, Caprara S, Farshad M, Widmer J

   “Bone density optimized pedicle screw insertion”

    

   [46] 2023 The Journal of Bone and Joint Surgery

   Farshad M, Unterfrauner I, Widmer J, Schader JF, Calek, AK

   “Vertebropexy as a Ligamentous Stabilization for Degenerative Low-Grade Spondylolisthesis: A Report of 3 Cases”

    

   [47] 2023 The Spine Journal

   Spirig JM, Fasser MR, Widmer J, Wanivenhaus F, Laux C, Farshad M, Passaplan C

   “Intraoperative anteroposterior and oblique fluoroscopic views for detection of mediolateral pedicle screw misplacement in the lumbar spine: A randomized cadaveric study”

    

   [48] 2024 The Spine Journal

   Calek AK, Cornaz F, Fasser MR, Suter M, Baumgartner S, Sager P, M Farshad, Widmer J

   “Load distribution on intervertebral cages with and without posterior instrumentation”

    

   [49] 2024 The Spine Journal

   Meisterhans M, Hagel V, Spirig JM, Spirig JM, Fasser MR, Farshad M, Widmer J

   “The Biomechanics of the Transpedicular Endoscopic Approach”

    

   [50] 2024 European Spine Journal

   Calek AK, Cornaz F, Suter M, Fasser MR, M Farshad, Widmer J

   “Endplate weakening during cage bed preparation significantly reduces endplate load capacity”

    

   [51] 2024 Neurospine

   Farshad M, Stauffer A, Zipser CM, Kheram N, Spirig JM, Hagel V, Widmer J, Schader J

   “An Experimental Model for Fluid Dynamics and Pressures During Endoscopic Lumbar Discectomy”

    

   [52] 2024 IEEE Open Journal of Engineering in Medicine and Biology

   Rohner R, Bauer DE, Hartmann M, Götschi T, Farshad M, Widmer J

   “Feasibility of an inductive pedicle screw loosening detection concept using a pulse induction metal detector”

    

   [53] 2024 Spine Deformity

   Lang S, Kim JH, Jokeit M, Urbanschitz L, Fisler L, Torrez C, Snedeker JG, Farshad M, Widmer J

   “Anatomical landmark detection on bi-planar radiographs for predicting spinopelvic parameters”

    

   [54] 2024 IEEE Symposium on VLSI Technology and Circuits

   Keller T, Incandela R, Chen X, Ghiasi H, Khodaee M, Arjmandpour S, Liao J, He L, Götschi T, Widmer J, Jang T

   “A 0.29pJ/step Fully Discrete-Time Charge Domain Bridge-to-Digital Converter for Force Sensing in Spinal Implants Using RC Bridge”

    

   [55] 2024 European Spine Journal

   Seibold M, Sigrist B, Götschi T, Widmer J, Hodel S, Farshad M, Navab N, Fürnstah P, Laux C.

   “A new sensing paradigm for the vibroacoustic detection of pedicle screw loosening”

    

   [56] 2024 Springer Nature Switzerland

   Jud L, Farshad M, Spirig JM, Widmer J, Sutter R, Fürnstahl P

   “Artificial Intelligence in Spine Surgery”

    

   [57] 2025 The Spine Journal

   Tsagkaris C, Fasser MR, Farshad M, Passaplan C, Cornaz F, Widmer J, Spirig JM

   “Stability of medially and laterally malpositioned screws: a biomechanical study on cadavers”

    

   [58] 2025 European Spine Journal

   Jokeit M, Cornaz F, Schader JF, Harshbarger CL, Calek AK, Jecklin S, Snedeker JG, Farshad M, Widmer J

   “The importance of the posterior osteoligamentous complex of the lumbar spine: dogma changing biomechanical insights”

    

   [59] 2025 Journal of Orthopaedic Surgery and Research

   Jokeit M, Tsagkaris C, Altorfer FCS, Cornaz F, Sneder JG, Farshad M, Widmer J

   “Impact of Iatrogenic Alterations on Adjacent Segment Degeneration After Lumbar Fusion Surgery: A Systematic Review”

    

   [60] 2025 European Spine Journal

   Widmer J, Calek A, Fasser MR, Suter M, Allen B, Farshad M

   “Spinous process resistance to different materials and looping techniques for interspinous lumbar vertebropexy”

    

   [61] 2025 North American Spine Society Journal

   Farshad M, Laux CJ, Wanivenhaus F,

   Spirig JM, Widmer J, Kelly M, Quillo-Olvera J, Kim JS, Van Isseldyk F, Gollogly S, Yue J, Ma X, Hagel V, Cornaz F

   “Classification of Endoscopic Spine Procedures”

    

   [62] 2025 Clinical Biomechanics

   Dimitriou D, Meisterhans M, Wolf-Wettstein J, Geissmann M, Fasser MR, Widmer J, Borbas P, Hoch A, Zing PO

   “The effect of experimentally induced gluteal muscle weakness on joint kinematics, reaction forces, and dynamic balance performance during stair climbing”

    

   [63] 2025 The Spine Journal

   Widmer J, Schuler A, Calek AC, Beretta-Piccoli AB, Wigger O, Graf R, Kiener L, Rohner R, Fasser MR, Farshad M

   “Failure forces of different interspinous vertebropexy techniques”

    

   [64] 2025 Frontiers in Bioengineering and Biotechnology

   Fasser MR, Furrer PR, Fisler L, Urbanschitz L, Snedeker JG, Farshad M, Widmer J

   “The Triadic Relationship Between Spinal Posture, Loading, and Degeneration”

    

   [65] 2025 The Spine Journal

   Loggia G, Farshad M, Jokeit M, Widmer J, Dossi S, Burkhard M

   “Impact of Spinal Alignment on Adjacent Segment Disease and Degeneration After Short-Segment Lumbosacral Fusion”

    

   [66] 2025 The Spine Journal

   Khodaee M, Sager P, Suter M, Götschi T, Allen B, Jang T, Farshad M, Widmer J

   “Quantifying In-Vitro Load-Sharing in Spinal Fusion Surgical Constructs Using Strain Sensor-Equipped Fixation Rods and Force Sensor-Equipped Intervertebral Cages”

    

   [67] 2025 The Spine

   Bauer M, Sebesteny L, Wigger O, Rohner R, Farshad M, Widmer J, Betz M

   “Pretapping is not effective in preventing pedicle fractures in lumbar spinal instrumentation: A biomechanical cadaveric study”

    

   [68] 2025 Neurospine

   Farshad M*, Schader JF*, Stauffer A, Zipser CM, Kheram N, Spirig JM, Fasser MR, Widmer J, Hagel V

   “Intra-, epidural and intracranial pressure changes during full-endoscopic interlaminar lumbar discectomy, with and without dural tear”

    

   [69] 2025 European Spine Journal

   Götschi T, Maranta G, Bernet M, Zemp KM, Farshad M, Widmer J

   “Bone density-optimized pedicle screw planning enhances mechanical stability”