A5074750351- Orthopaedic implants and arthroplasty
- Total Knee Arthroplasty Outcomes
- Orthopedic Infections and Treatments
- Spine and Intervertebral Disc Pathology
- Hip disorders and treatments
- Advanced materials and composites
- Spinal Fractures and Fixation Techniques
- Musculoskeletal pain and rehabilitation
- Bone fractures and treatments
- Medical Imaging and Analysis
- Pelvic and Acetabular Injuries
- Bone health and osteoporosis research
- Bone Tissue Engineering Materials
- Shoulder Injury and Treatment
- Hip and Femur Fractures
- Shoulder and Clavicle Injuries
- Dental Implant Techniques and Outcomes
- Advanced X-ray and CT Imaging
- Osteoarthritis Treatment and Mechanisms
- Cardiac Valve Diseases and Treatments
- Aortic aneurysm repair treatments
- Lower Extremity Biomechanics and Pathologies
- Cardiac Imaging and Diagnostics
- Bone and Joint Diseases
- Diabetic Foot Ulcer Assessment and Management
Hamburg University of Technology
2016-2025
Universität Hamburg
2016-2025
University Medical Center of the Johannes Gutenberg University Mainz
2018-2025
Johannes Gutenberg University Mainz
2018-2025
CeramTec (Germany)
2018
University Medical Center Hamburg-Eppendorf
2006-2017
Marymount University
2016
Georgia Institute of Technology
2015
Universitätsmedizin Göttingen
2015
University Medical Center Utrecht
2015
The aim here was to define realistic load conditions for hip implants, based on in vivo contact force measurements, and see whether current ISO standards indeed simulate real loads. scenarios obtained are forces measured 4 patients during different activities activity records from 31 patients. can be adapted various test purposes by applying average or high peak loads, high-impact additional low-impact activities, simulating normal very active most strenuous walking (average 1800 N, 3900 N),...
Resurfacing of the hip joint is experiencing a revival due to improvements in materials, design, and manufacturing techniques. Despite good midterm outcomes, high early rate failure concerns about metal debris require detailed morphological wear analysis retrieved resurfacing implants order understand mechanisms.A worldwide collection revision devices was initiated, 267 components were received. Devices analyzed by patient demographics, radiographic positioning, wear, as well morphologically...
Background: Robotic-assisted total hip replacement has become a common method of implantation, especially in Europe. It frequently been postulated that robotic reaming would result an improved clinical outcome due to the better fit prosthesis, but never demonstrated prospective study, our knowledge. The purpose this study was compare robotic-assisted implantation with conventional manual implantation. Methods: One hundred and fifty-four patients scheduled for were randomly assigned undergo...
The connective hard tissues bone and teeth are highly porous on a micrometer scale, but show high values of compression strength at relatively low weight. fabrication materials has been actively researched different processes have developed that vary in preparation complexity also the type material they produce. Methodologies available for determination pore properties. purpose paper is to give an overview these methods, role porosity natural effect properties living tissues. minimum size...
The aim of this study was to estimate the 90-day risk revision for periprosthetic femoral fracture associated with design features cementless stems, and investigate effect a collar on using biomechanical in vitro model.A total 337 647 primary hip arthroplasties (THAs) from United Kingdom National Joint Registry (NJR) were included multivariable survival regression analysis identify adjusted hazard following THA stem. evaluated an model paired fresh frozen cadaveric femora.The prevalence...
ABSTRACT Wear of the modular taper between head and shaft has been related to clinical failure resulting from adverse reactions metallic debris. The problem become pronounced in large metal‐on‐metal bearings, but mechanism not yet fully understood. We analyzed retrieved components five patients revised with various diagnoses. Two distinct wear patterns were observed for tapers. Three samples demonstrated “asymmetric” towards inner end taper. other two showed “axisymmetric” radial (up 65 µm)...
Aims Periprosthetic femoral fractures (PPF) are a serious complication of total hip arthroplasty (THA) and becoming an increasingly common indication for revision with the ageing population. This study aimed to identify potential risk factors PPF based on analysis registry data. Methods Cases recorded as primary in German Arthroplasty Registry (Endoprothesenregister Deutschland (EPRD)), well those classified having according International Classification Diseases (ICD) codes patients’...
Purpose: To analyze surface alterations and fractures observed in the nitinol stent wires of explanted endovascular grafts used for treatment abdominal aortic aneurysm. Methods: Twenty-one Stentor devices 1 Cragg were received from investigators Germany France. After macroscopy photography, explants cleaned polyester coating removed. The frame was examined completely by stereomicroscopy, irregularities assayed scanning electron microscopy energy dispersive x-ray analysis (EDAX). classified...
Internal fixators are a new class of implants designed to preserve the periosteal blood supply bone. In contrast conventional plate fixation in which screws have spherical heads and loaded mainly by axial pullout forces, internal "locked" within therefore subjected as well bending loads. this study ultimate loads commercially available fixator system were tested (n = 72) cantilever mode metaphyseal diaphyseal regions four pairs human tibiae with different bone qualities. Cortical thickness...
The present revival of hip resurfacing arthroplasty may be related to an increase in early failures owing the challenging technique procedure. Fifty-five retrieved implants were analysed with respect wear, cement mantle and penetration, fracture head morphology, as well standard histology. Femoral neck fractures occurred median after 102 days. time failure was shorter for older women. Major deviations from suggested thickness penetration found. Indications high trauma during implantation...
The purpose of this investigation was to study the influence flare at lateral side heel running shoes on: initial and total pronation; impact forces in heel-toe running; explain results with a mechanical model. experimental part performed by using 14 male runners. Their movement (4 m/s) quantified force platform high-speed film (100 frames X s-1). Three were used, identical except their flare, one shoe conventional 16 degrees, second no third rounded (negative flare). indicate that (for used...
First introduced in 2005, the "Intertan" (IT), an intramedullary nail with two cephalocervical screws, has become increasingly popular option for treating intertrochanteric fractures. The purpose of this study was to identify utility device stabilization unstable femoral neck fractures compared cannulated screws (CS) and a dynamic hip screw (DHS).Twenty-four human cadaveric femurs were harvested assigned three groups that matched regard bone mineral density (BMD). Standardized...
Monitoring of osteoporosis therapy based solely on DXA is insufficient to assess antifracture efficacy. Estimating bone strength as a variable closely linked fracture risk therefore importance. Finite element (FE) analysis-based measures were used monitor teriparatide and the associated effects whole local risk. In 44 postmenopausal women with established participating in EUROFORS study, FE models high-resolution CT (HRCT) T(12) evaluated after 0, 6, 12, 24 mo treatment (20 microg/d)....
Traumatic acromioclavicular (AC) joint dislocations can be addressed with several surgical stabilization techniques. The aim of this in vitro study was to evaluate biomechanical features the native compared 3 different methods: locking hook plate (HP), TightRope (TR), and bone anchor system (AS).The HP provides higher stiffness than anatomic reconstruction techniques.Controlled laboratory study.A new model AC used analyze stability after repair (HP, TR, AS). Eighteen cadaveric specimens were...