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  - JOUR
A1  - Bäcker, Matthias
A1  - Schusser, Sebastian
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - Degradationsverhalten bioabbaubarer Polymere : siliziumbasierte Sensorik zur Überwachung
JF  - GIT Labor-Fachzeitschrift
Y1  - 2013
SN  - 0016-3538
SP  - 32
EP  - 33
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - BOOK
A1  - Laack, Walter van
T1  - Eine bessere Geschichte unserer Welt / Bd. 1. Das Universum
Y1  - 2000
SN  - 978-3-8311-0345-4
PB  - van Laack
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Thust, M.
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
A1  - Naser, S.
A1  - Müller-Veggian, Mattea
A1  - Kordos, P.
A1  - Lüth, H.
T1  - Crosssensitivity of a capacitive penicillin sensor combined with a diffusion barrier
JF  - Proceedings : The Hague, The Netherlands, September 12 - 15, 1999 / [ed. by M. Bartek]. Vol 1.
Y1  - 1999
SN  - 90-76699-02-X
N1  - Eurosensors ; (13, 1999, 's-Gravenhage) ; Eurosensors ; (13 : ; 1999.09.12-15 : ; The Hague) ; European Conference on Solid-State Transducers ; (13 : ; 1999.09.12-15 : ; The Hague)
SP  - 573
EP  - 576
CY  - The Hague, The Netherlands
ER  - 
TY  - JOUR
A1  - Laack, Walter van
A1  - Refisch, A.
A1  - Vogel, P.
T1  - Polymyalgia rheumatica vom Beckengürteltyp: Eine seltene Differentialdiagnose der radikulären und pseudoradikulären Lumbalsyndrome. Fallbeschreibung und Literaturübersicht / Refisch, A. ; Laack, W. van ; Vogel, P.
JF  - Orthopädische Praxis. 23 (1987)
Y1  - 1987
SN  - 0030-588x
SP  - 567
ER  - 
TY  - CHAP
A1  - Poghossian, Arshak
A1  - Ingebrandt, S.
A1  - Platen, J.
A1  - Schöning, Michael Josef
T1  - Field-effect sensors with charged macromolecules – from micro towards nano aspects
T2  - Biochemical Sensing Utilisation of Micro-and                       Nanotechnologies, Warschau, Nov. 2005 : Lecture Notes of the                       ICB Seminar / ed.: M. Mascini, W. Torbicz
Y1  - 2006
SP  - 74
EP  - 81
PB  - Polish Academy Sciences Press
CY  - Warsaw
ER  - 
TY  - JOUR
A1  - Laack, Walter van
T1  - Physiotherapeutische Behandlung nach Gelenkoperationen
JF  - Aktuelle Ergebnisse der Osteologie : Timmendorfer Strand, 21. - 23. November 1985 / hrsg. von P. Dietsch
Y1  - 1986
SN  - 3-11-011147-0
N1  - Osteologia ; 1
PB  - de Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Poghossian, Arshak
A1  - Jablonski, Melanie
A1  - Koch, Claudia
A1  - Bronder, Thomas
A1  - Rolka, David
A1  - Wege, Christina
A1  - Schöning, Michael Josef
T1  - Field-effect biosensor using virus particles as scaffolds for enzyme immobilization
JF  - Biosensors and Bioelectronics
N2  - A field-effect biosensor employing tobacco mosaic virus (TMV) particles as scaffolds for enzyme immobilization is presented. Nanotubular TMV scaffolds allow a dense immobilization of precisely positioned enzymes with retained activity. To demonstrate feasibility of this new strategy, a penicillin sensor has been developed by coupling a penicillinase with virus particles as a model system. The developed field-effect penicillin biosensor consists of an Al-p-Si-SiO₂-Ta₂O₅-TMV structure and has been electrochemically characterized in buffer solutions containing different concentrations of penicillin G. In addition, the morphology of the biosensor surface with virus particles was characterized by scanning electron microscopy and atomic force microscopy methods. The sensors possessed a high penicillin sensitivity of ~ 92 mV/dec in a nearly-linear range from 0.1 mM to 10 mM, and a low detection limit of about 50 µM. The long-term stability of the penicillin biosensor was periodically tested over a time period of about one year without any significant loss of sensitivity. The biosensor has also been successfully applied for penicillin detection in bovine milk samples.
Y1  - 2018
U6  - https://doi.org/10.1016/j.bios.2018.03.036
SN  - 0956-5663
VL  - 110
SP  - 168
EP  - 174
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bäcker, Matthias
A1  - Schusser, Sebastian
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - Multi-Parametererfassung mit siliziumbasiertem Sensorchip: Aus Drei mach Eins
JF  - GIT Labor-Fachzeitschrift
Y1  - 2014
SN  - 0016-3538
IS  - 2
SP  - 28
EP  - 30
PB  - Wiley
ER  - 
TY  - JOUR
A1  - Schöning, Michael Josef
A1  - Poghossian, Arshak
A1  - Schultze, J. W.
A1  - Lüth, H.
T1  - Field-effect based multifunctional hybrid sensor module for the determination of both (bio-)chemical and physical paramters
JF  - Proceedings of SPIE. 4576 (2002)
Y1  - 2002
SP  - 149
EP  - 159
ER  -