Výsledky vyhledávání - "Gafar Adam Ahmed"

How do the geometries of the broach handles relate to the distribution of force and moments in a femoral model?

Autor: Gafar Adam Ahmed, Alexander Jahnke, Markus Rickert, Bernd Ishaque, Carlos Alfonso Fonseca Ulloa, Anja Seeger

Publikováno v: Medical Engineering & Physics. 86:122-127

The continuous improvement of minimally invasive hip endoprostheses surgery comes with a change in geometries of surgery instruments like the broach handles. Consequently, depending on the handles' curvature this results in a deviation between handle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::713d8ace69c1a1683d8a1fa6becba504
https://doi.org/10.1016/j.medengphy.2020.11.001

Zobrazit plný text záznamu

Influence of antibiotic pellets on pore size and shear stress resistance of impacted native and thermodisinfected cancellous bone: An in vitro femoral impaction bone grafting model

Autor: Marian Kampschulte, J. Bok, Gabriele A. Krombach, C.A. Fonseca Ulloa, Gafar Adam Ahmed, Christian Fölsch, Alexander Jahnke, Markus Rickert

Publikováno v: J Orthop

Introduction Morphology and mechanic properties of impacted cancellous bone are affected by carrier substances which provide high local concentrations of antibiotics. Methods Bone chips were taken from the femoral head of 6–7 months old piglets. On

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8ab100c81cd10252da80ba603689808
https://doi.org/10.1016/j.jor.2020.09.011

Zobrazit plný text záznamu

How screw connections influence the primary stability of acetabular cups under consideration of different bone models

Autor: Christian Fölsch, Alexander Jahnke, Gafar Adam Ahmed, Linda Auge, Carlos Alfonso Fonseca Ulloa, Bernd Ishaque, Jessica Loke, Markus Rickert

Publikováno v: J Orthop

Introduction Good osteointegration of implants requires sufficient primary stability. Aim of this study was to examine the influence of screw fixation on the primary stability of press-fit cups. Methods Two press-fit acetabular cups were tested with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb6f02935380feef3df1b67c5390b87c
https://doi.org/10.1016/j.jor.2020.05.020

Zobrazit plný text záznamu

Biomechanical testing of various suture techniques for Achilles tendon repair with and without augmentation by using synthetic polyester grafts

Autor: Helge Hudel, Gafar Adam Ahmed, Alexander Jahnke, Carlos Alfonso Fonseca Ulloa, Mario Gernandt, Markus Rickert, Dirk Stolz

Publikováno v: Journal of Biomechanics. 93:132-139

Following surgical Achilles tendon reconstruction surgery, there is a distinct trend towards an early and faster rehabilitation protocol to avoid muscle atrophy. However, this procedure involves the risk of a higher complication rate. In order to red

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7da077969b9abf0bdbecc14dfa498851
https://doi.org/10.1016/j.jbiomech.2019.06.021

Zobrazit plný text záznamu

Clinical evaluation of a novel press-fit acetabular cup using 'Ein-Bild-Roentgen-Analysis' (EBRA): A positive short-term prognosis

Autor: Alexander Jahnke, Gafar Adam Ahmed, Bernd Ishaque, C.A. Fonseca Ulloa, J. Wieczorek, Markus Rickert, Jörn Bengt Seeger

Publikováno v: J Orthop

Introduction Demographic change and demand for high quality of life lead to increasing implantation numbers. Aim of this study was to compare the Plasmafit® cup to Allofit® and Plasmacup®. Methods The study included 174 patients who had received 3

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e30ee9d2ff331c77b844b044b0788c9
https://europepmc.org/articles/PMC7136611/

Zobrazit plný text záznamu

Development of periprosthetic bone mass density around the cementless Metha® short hip stem during three year follow up—a prospective radiological and clinical study

Autor: Bernd Ishaque, Gafar Adam Ahmed, Alexander Jahnke, Markus Rickert, Cathrein Bobach, Sarah Boller, Laura Augustin

Publikováno v: International Orthopaedics. 43:2031-2037

The purpose of this study was to check the concept of the cementless Metha® short hip stem in order to find out whether proximal physiological load transfer can be achieved. Fourty-three patients were included. Epidemiological factors were establish

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d95b8be461a1d5798e6b12f160cfef5
https://doi.org/10.1007/s00264-018-4126-1

Zobrazit plný text záznamu

Effect of bearing friction torques on the primary stability of press-fit acetabular cups: A novel in vitro method

Autor: Markus Rickert, Carlos Alfonso Fonseca Ulloa, Stefan Schroeder, Bernd Ishaque, Gafar Adam Ahmed, Alexander Jahnke

Publikováno v: Journal of Orthopaedic Research®. 36:2745-2753

Aseptic loosening is the main reason for revision of total hip arthroplasty, and relative micromotions between cementless acetabular cups and bone play an important role regarding their comparatively high loosening rate. Therefore, the aim of the pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9039fe4c19df2a41662396fd9e529a92
https://doi.org/10.1002/jor.24041

Zobrazit plný text záznamu

Analysis of the elastic bending characteristics of cementless short hip stems considering the valgus alignment of the prosthetic stem

Autor: Gerhard Walter Jahnke, Gafar Adam Ahmed, Markus Rickert, Alexander Jahnke, Jörn Bengt Seeger, Carlos Alfonso Fonseca Ulloa, Bernd Ishaque

Publikováno v: Clinical Biomechanics. 52:49-56

Background The resultant hip force causes a varus torque which must be compensated by a shear force couple depending on the stem alignment of the prosthesis. Since the prosthesis is substantially less flexible than the bone, the interior of the femur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a60ba468624f0e2a49881f64ba95ebe4
https://doi.org/10.1016/j.clinbiomech.2018.01.006

Zobrazit plný text záznamu

Allogene Knochentransplantation in der Hüftrevisionsendoprothetik

Autor: Bernd Ishaque, Markus Rickert, Christian Fölsch, Gafar Adam Ahmed

Publikováno v: Der Orthopäde. 47:52-66

Mit der steigenden Anzahl von Endoprothesentragern wird die Revision von Huftendoprothesen weiter zunehmen. Die Rekonstruktion ossarer Defekte mit allogenen Knochen ermoglicht die Wiederherstellung eines knochernen Lagers und verbessert die langfrist

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e042f1be1631ce51bff698822830340c
https://doi.org/10.1007/s00132-017-3506-3

Zobrazit plný text záznamu

Comparison of Short Stems Versus Straight Hip Stems: A Biomechanical Analysis of the Primary Torsional Stability

Autor: Bernd Ishaque, Carlos Alfonso Fonseca Ulloa, Alexander Jahnke, Markus Rickert, J.B. Seeger, Suleiman Ghandourah, Gafar Adam Ahmed

Publikováno v: Journal of biomechanical engineering. 142(12)

Cementless straight stems show very good survival rates. However, the more distal force application of straight stems may lead to release-related proximal stress-shielding. Nevertheless, this technical brief had the objective of conducting a biomecha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa3c5e46af304735d03f8274f2315bc4
https://pubmed.ncbi.nlm.nih.gov/32601705

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání