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993 results on '"Verdonschot, N.J.J."'

7. Safety of bone-anchored prostheses in lower extremity amputation

Author

Kleuver, M. de, Verdonschot, N.J.J., Frolke, J.P.M., Leijendekkers, R.A., Atallah, R., Kleuver, M. de, Verdonschot, N.J.J., Frolke, J.P.M., Leijendekkers, R.A., and Atallah, R.

Abstract

Radboud University, 03 november 2023, Promotores : Kleuver, M. de, Verdonschot, N.J.J. Co-promotores : Frolke, J.P.M., Leijendekkers, R.A., Item does not contain fulltext

Published
2023

12. The Functionality Verification through Pilot Human Subject Testing of MyFlex-delta: An ESR Foot Prosthesis with Spherical Ankle Joint

Author

Tabucol, Johnnidel, Kooiman, Vera G.M., Leopaldi, Marco, Brugo, Tommaso Maria, Leijendekkers, R.A., Tagliabue, Gregorio, Verdonschot, N.J.J., Carloni, Raffaella, Zucchelli, Andrea, Tabucol, Johnnidel, Kooiman, Vera G.M., Leopaldi, Marco, Brugo, Tommaso Maria, Leijendekkers, R.A., Tagliabue, Gregorio, Verdonschot, N.J.J., Carloni, Raffaella, and Zucchelli, Andrea

Abstract

Contains fulltext : 250279.pdf (Publisher’s version ) (Open Access)

Published
2022

19. Tibial and trochlear osteotomies: A safe track towards patellar stability

Author

Verdonschot, N.J.J., Groes, S.A.W. van de, Koeter, S., Sambeeck, J.D.P. van, Verdonschot, N.J.J., Groes, S.A.W. van de, Koeter, S., and Sambeeck, J.D.P. van

Abstract

Radboud University, 02 december 2021, Promotor : Verdonschot, N.J.J. Co-promotores : Groes, S.A.W. van de, Koeter, S., Contains fulltext : 240246.pdf (Publisher’s version ) (Open Access)

Published
2021

30. Biomechanical assessment of all-polymer total knee replacement

Author

Verdonschot, N.J.J., Janssen, D.W., Ruiter, L. de, Verdonschot, N.J.J., Janssen, D.W., and Ruiter, L. de

Abstract

Radboud University, 11 september 2020, Promotor : Verdonschot, N.J.J. Co-promotor : Janssen, D.W., Contains fulltext : 220339.pdf (publisher's version ) (Open Access)

Published
2020

32. Treatment of patellofemoral instability

Author

Kampen, A. van, Verdonschot, N.J.J., Koeter, S., Groes, S.A.W. van de, Rood, A., Kampen, A. van, Verdonschot, N.J.J., Koeter, S., Groes, S.A.W. van de, and Rood, A.

Abstract

Radboud University, 30 oktober 2019, Promotores : Kampen, A. van, Verdonschot, N.J.J. Co-promotores : Koeter, S., Groes, S.A.W. van de, Contains fulltext : 207778.pdf (publisher's version ) (Open Access)

Published
2019

33. Step by step: rehabilitation and outcomes of persons with a lower extremity amputation using a bone-anchored prosthesis

Author

Nijhuis-van der Sanden, M.W.G., Verdonschot, N.J.J., Hoogeboom, T.J., Frolke, J.P.M., Leijendekkers, R.A., Nijhuis-van der Sanden, M.W.G., Verdonschot, N.J.J., Hoogeboom, T.J., Frolke, J.P.M., and Leijendekkers, R.A.

Abstract

Radboud University, 15 februari 2019, Promotores : Nijhuis-van der Sanden, M.W.G., Verdonschot, N.J.J. Co-promotores : Hoogeboom, T.J., Frolke, J.P.M., Contains fulltext : 200681.pdf (publisher's version ) (Open Access)

Published
2019

34. Reproducibility and discriminant validity of two clinically feasible measurement methods to obtain coronal plane gait kinematics in participants with a lower extremity amputation

Author

Leijendekkers, R.A., Hoogeboom, T.J., Hinte, G.J. van, Didden, L., Anijs, T.J., Nijhuis-van der Sanden, M.W.G., Verdonschot, N.J.J., Leijendekkers, R.A., Hoogeboom, T.J., Hinte, G.J. van, Didden, L., Anijs, T.J., Nijhuis-van der Sanden, M.W.G., and Verdonschot, N.J.J.

Abstract

Contains fulltext : 204048.pdf (publisher's version ) (Open Access)

Published
2019

39. Personalized musculoskeletal modeling of the knee joint

Author

Verdonschot, N.J.J., Koopman, H.F.J.M., Janssen, D.W., Marra, M.A., Verdonschot, N.J.J., Koopman, H.F.J.M., Janssen, D.W., and Marra, M.A.

Abstract

Radboud University, 16 april 2019, Promotores : Verdonschot, N.J.J., Koopman, H.F.J.M. Co-promotor : Janssen, D.W., Contains fulltext : 201897.pdf (publisher's version ) (Open Access)

Published
2019

40. Musculoskeletal modeling combined with a finite element model to predict wear at the taper junction in total hip arthroplasty

Author

Bitter, Thom, Marra, Marco Antonio, Khan, Imran, Marriott, Tim, Lovelady, Elaine, Verdonschot, N.J.J., and Janssen, Dennis W.

Abstract

Introduction Fretting corrosion at the taper interface of modular connections can be studied using Finite Element (FE) analyses. However, the loading conditions in FE studies are often simplified, or based on generic activity patterns. Using musculoskeletal modeling, subject-specific muscle and joint forces can be calculated, which can then be applied to a FE model for wear predictions. The objective of the current study was to investigate the effect of incorporating more detailed activity patterns on fretting simulations of modular connections. Methods Using a six-camera motion capture system, synchronized force plates, and 45 optical markers placed on 6 different subjects, data was recorded for three different activities: walking at a comfortable speed, chair rise, and stair climbing. Musculoskeletal models, using the Twente Lower Extremity Model 2.0 implemented in the AnyBody modeling System™ (AnyBody Technology A/S, Aalborg, Denmark; figure1), were used to determine the hip joint forces. Hip forces for the subject with the lowest and highest peak force, as well as averaged hip forces were then applied to an FE model of a modular taper connection (Biomet Type-1 taper with a Ti6Al4V Magnum +9 mm adaptor; Figure 2). During the FE simulations, the taper geometry was updated iteratively to account for material removal due to wear. The wear depth was calculated based on Archard's Law, using contact pressures, micromotions, and a wear factor, which was determined from accelerated fretting experiments. Results The forces for the comfortable walking speed had the highest peak forces for the maximum peak subject, with a maximum peak force of 3644 N, followed by walking up stairs, with a similar maximum peak force of 3626 N. The chair rise had a lower maximum peak force of 2240 N (−38.5%). The simulated volumetric wear followed the trends seen in the peaks of the predicted hip joint forces, with the largest wear volumes predicted for a comfortable walking speed, followed by the stairs up activity and the chair rise (Figure 3). The subjects with the highest peak forces produced the most volumetric wear in all cases. However, the lowest peak subject had a higher volumetric wear for the stairs up case than the average subject. Discussion This study explored the effect of subject-specific variations in hip joint loads on taper fretting. The results indicate that taper wear was predominantly affected by the magnitudes of the peak forces, rather than by the orientation of the force. A more comprehensive study, capturing the full spectrum of patient variability, can help identifying parameters that accelerate fretting corrosion. Such a study should also incorporate other sources of variability, including surgical factors such as implant orientation, sizing, and offset. These factors also affect hip joint forces, and can be evaluated in musculoskeletal models such as presented here.

Published
2018

45. Flexing and downsizing the femoral component is not detrimental to patellofemoral biomechanics in posterior-referencing cruciate-retaining total knee arthroplasty

Author

Marra, M.A., Strzelczak, Marta, Heesterbeek, Petra J. C., Groes, S.A.W. van de, Janssen, D.W., Koopman, B., Verdonschot, N.J.J., Wymenga, A.B., Marra, M.A., Strzelczak, Marta, Heesterbeek, Petra J. C., Groes, S.A.W. van de, Janssen, D.W., Koopman, B., Verdonschot, N.J.J., and Wymenga, A.B.

Abstract

Contains fulltext : 197173.pdf (publisher's version ) (Open Access)

Published
2018

50. Joint preservation of unicompartmental knee osteoarthritis

Author

Kampen, A. van, Verdonschot, N.J.J., Loon, C.J.M. van, Egmond, N. van, Kampen, A. van, Verdonschot, N.J.J., Loon, C.J.M. van, and Egmond, N. van

Abstract

Radboud University, 22 juni 2018, Promotores : Kampen, A. van, Verdonschot, N.J.J. Co-promotor : Loon, C.J.M. van, Contains fulltext : 191596.pdf (publisher's version ) (Open Access)

Published
2018

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