TY  - CHAP
A1  - Kahmann, Stephanie
A1  - Hackl, Michael
A1  - Wegmann, Kilian
A1  - Müller, Lars-Peter
A1  - Staat, Manfred
ED  - Erni, Daniel
T1  - Impact of a proximal radial shortening osteotomy on the distribution of forces and the stability of the elbow
T2  - 1st YRA MedTech Symposium 2016 : April 8th / 2016 / University of Duisburg-Essen
N2  - The human arm consists of the humerus (upper arm), the medial ulna and the lateral radius (forearm). The joint between the humerus and the ulna is called humeroulnar joint and the joint between the humerus and the radius is called humeroradial joint. Lateral and medial collateral ligaments stabilize the elbow. Statistically, 2.5 out of 10,000 people suffer from radial head fractures [1]. In these fractures the cartilage is often affected. Caused by the injured cartilage, degenerative diseases like posttraumatic arthrosis may occur. The resulting pain and reduced range of motion have an impact on the patient’s quality of life. Until now, there has not been a treatment which allows typical loads in daily life activities and offers good long-term results. A new surgical approach was developed with the motivation to reduce the progress of the posttraumatic arthrosis. Here, the radius is shortened by 3 mm in the proximal part [2]. By this means, the load of the radius is intended to be reduced due to a load shift to the ulna. Since the radius is the most important stabilizer of the elbow it has to be confirmed that the stability is not affected. In the first test (Fig. 1 left), pressure distributions within the humeroulnar and humeroradial joints a native and a shortened radius were measured using resistive pressure sensors (I5076 and I5027, Tekscan, USA). The humerus was loaded axially in a tension testing machine (Z010, Zwick Roell, Germany) in 50 N steps up to 400 N. From the humerus the load is transmitted through both the radius and the ulna into the hand which is fixed on the ground. In the second test (Fig. 1 right), the joint stability was investigated using a digital image correlation system to measure the displacement of the ulna. Here, the humerus is fixed with a desired flexion angle and the unconstrained forearm lies on the ground. A rope connects the load actuator with a hook fixed in the ulna. A guide roller is used so that the rope pulls the ulna horizontally when a tensile load is applied. This creates a moment about the elbow joint with a maximum value of 7.5 Nm. Measurements were performed with varying flexion angles (0°, 30°, 60°, 90°, 120°). For both tests and each measurement, seven specimens were used. Student ́s t-test was employed to determine whether the mean values of the measurements in native specimen and operated specimens differ significantly.
Y1  - 2016
U6  - https://doi.org/10.17185/duepublico/40821
SP  - 7
EP  - 8
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Tran, Ngoc Trinh
A1  - Tran, Thanh Ngoc
A1  - Matthies, Hermann G.
A1  - Stavroulakis, Georgios Eleftherios
A1  - Staat, Manfred
T1  - FEM Shakedown of uncertain structures by chance constrained programming
T2  - PAMM Proceedings in Applied Mathematics and Mechanics
Y1  - 2016
U6  - https://doi.org/10.1002/pamm.201610346
SN  - 1617-7061
N1  - Special Issue:
Joint 87th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM) and Deutsche Mathematiker-Vereinigung
VL  - 16
IS  - 1
SP  - 715
EP  - 716
ER  - 
TY  - CHAP
A1  - Marinova, V.
A1  - Kerroumi, I.
A1  - Lintermann, A.
A1  - Göbbert, J.H.
A1  - Moulinec, C.
A1  - Rible, S.
A1  - Fournier, Y.
A1  - Behbahani, Mehdi
T1  - Numerical Analysis of the FDA Centrifugal Blood Pump
T2  - NIC Symposium 2016
Y1  - 2016
SN  - 978-3-95806-109-5
SP  - 355
EP  - 364
ER  - 
TY  - CHAP
A1  - Jung, Alexander
A1  - Staat, Manfred
A1  - Müller, Wolfram
T1  - Effect of wind on flight style optimisation in ski jumping
T2  - 15th International Symposium on Computer Simulation in Biomechanics ; July 9th-11th 2015, Edinburgh, UK
Y1  - 2016
SP  - 53
EP  - 54
PB  - The University of Edinburgh ; Loughborough University
CY  - Edinburgh
ER  - 
TY  - CHAP
A1  - Laack, Walter van
T1  - Schnittstelle Tod: Wo stehen wir nach 40 Jahren NTE-Forschung?
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:101:1-201603132912
SN  - 978-3-936624-30-4 (Print-Ausgabe)
SN  - 978-3-936624-32-8 (Online-Ausgabe)
N1  - Tagungsbeiträge des 4. Europäischen Seminars am 07. November 2015 in Aachen zum Thema Nahtoderfahrungen mit dem Serientitel: "Schnittstelle Tod"
PB  - van Laack GmbH
CY  - Aachen
ER  -