Article
Cell & Tissue Engineering
S. Bergiers, H. Hothi, J. Henckel, A. Di Laura, M. Belzunce, J. Skinner, A. Hart
Summary: Edge loading in metal on metal hip arthroplasties, resulting in increased wear rates and ultimately failure, was predominantly located along the superior acetabular edge. The position of the edge wear was influenced by the cup's angle of inclination and anteversion, suggesting a potential relationship with hip joint forces and walking gait patterns. Further research using this method could enhance the understanding of optimal and safe acetabular component positioning.
BONE & JOINT RESEARCH
(2021)
Review
Engineering, Mechanical
Funing Xu, Ning Ding, Nan Li, Long Liu, Nan Hou, Na Xu, Weimin Guo, Linan Tian, Huixia Xu, Chi-Man Lawrence Wu, Xiaofeng Wu, Xiangfeng Chen
Summary: This work reviews the failure modes, mechanisms and causes of bearings in mechanical equipment. It analyzes failure modes such as fracture, corrosion, deformation and wear, and summarizes the research progress in bearing failure analysis over the past 20 years. It discusses the classification of failure modes and presents typical case studies. The study finds that wear and fatigue are the most common failure modes of bearings, and incorrect assembly, use, and maintenance are the main causes. The aim of this review is to provide systematic information for bearing failure analysis and improve the reliability of bearings.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Orthopedics
Enrick Castanet, Pierre Martinot, Julien Dartus, Eric Senneville, Henri Migaud, Julien Girard
Summary: This study compared the surgical treatment of post-operative infections between hip resurfacing arthroplasty (HRA) and total hip arthroplasty (THA), finding that the infection control rate was significantly higher in the HRA group and the Oxford-12 score was better in the HRA group than in the THA group.
INTERNATIONAL ORTHOPAEDICS
(2022)
Article
Materials Science, Coatings & Films
V. Kashyap, P. Ramkumar
Summary: Superior surface characteristics, including increased roughness and enhanced graphitic characteristics, can be achieved in DLC coated surface for hip implants through laser surface texturing and heat treatment. These techniques improve adhesion strength and deformation resistance by inducing phase formation and bonding behavior at the coating interlayer. The combination of surface texturing and DLC coating also results in lowest friction, making it beneficial for long term hip implant applications.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Biomedical
Eliezer Gutierres, Edmara Tatiely Pedroso Bergamo, Laura Firmo Carvalho, Paulo G. Coelho, Tiago Moreira Bastos Campos, Mariana Miranda de Toledo Piza, Adolfo Coelho de Oliveira Lopes, Ernesto Byron Benalcazar Jalkh, Estevam Augusto Bonfante
Summary: This study aims to evaluate the likelihood of survival and failure modes of extra-narrow implant systems with the same prosthetic components as standard-diameter implants. The results showed that using standardized prosthetic components for extra-narrow implants has a high probability of survival and a high characteristic strength, with failure modes restricted to the abutment. Therefore, this method can be a viable option for replacing anterior teeth.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Mechanical
Joe Pashley, Liam Blunt, Paul Bills, Radu Racasan
Summary: A fused metrology system has been designed and constructed to advance the study of wear phenomena involved in hip implants. The system allows for precise positional targeting of surface metrology using high spatial resolution optical interferometry. By 'fusing' Coordinate Measuring Machine (CMM) measurement and surface metrology datasets, careful wear scar analysis can be facilitated. The fixture system enables better understanding of hip implant performance and wear mechanisms, contributing to increased implant longevity.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Engineering, Biomedical
M. Nagentrau, A. L. Mohd Tobi, S. Jamian, Y. Otsuka, R. Hussin
Summary: The study developed a finite element computational model to examine delamination-fretting wear behavior at the HAp-Ti-6Al-4V interface of uncemented hip implant femoral stem component. Significant wear was observed under certain conditions, particularly at the contact edge due to high contact pressure and stress singularity effects.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Orthopedics
Firat Ozan, Murat Kahraman, Ali Baktir, Kursat Gencer
Summary: The study evaluated the clinical features and results of revision total hip arthroplasties in patients with catastrophic failures and metallosis. It was found that the mean Harris hip score increased by 20 points after revision THA, indicating improved clinical outcomes.
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Nibedita Nayak, Shaik Akbar Basha, Surya Kant Tripathi, Bijesh K. Biswal, Monalisa Mishra, Debasish Sarkar
Summary: The study demonstrates that wear debris from SrO-ZTA hip prosthesis does not exhibit cytotoxic or genotoxic effects in vitro and in vivo, with only minor oxidative stress observed in fruit flies at higher concentrations. This suggests a promising medical application potential for the SrO-ZTA composite implant.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Orthopedics
Stefan Klebingat, Tanja Bien, Janine Huertgen, Priyanka Grover, Marcel Dreischarf, Shareef Alkhateeb, Marcus Jaeger, Georg Rose
Summary: We propose and validate a novel, automated method for accurately and precisely measuring total hip arthroplasty parameters using CAD-model-based 2D-3D registration supported by convolutional neural networks. This method shows high accuracy and precision and has potential clinical applications.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Article
Orthopedics
Alison B. Suraci, Ramandeep S. Bhullar, Johanna S. Dobransky, Paul E. Beaule
Summary: This study demonstrated that metal-on-metal hip resurfacing through the Hueter anterior approach (HAA) has a high implant survivorship and stable patient-reported outcome measures. Although some patients required revision to total hips, radiographic parameters were good, significantly improving the quality of life for patients.
JOURNAL OF ARTHROPLASTY
(2021)
Article
Acoustics
Nai-Zhong Xu, Chang-Qing Liu, You-Jian Wang, Hong-Bin Dang
Summary: The study shows that the crack coalescence and propagation modes of rock-like specimens with prefabricated fissures can be divided into four types, and are influenced by the dip angle and length of the fissures.
SHOCK AND VIBRATION
(2021)
Article
Orthopedics
Timothy G. Costales, Patrick H. Greenwell, William Shield, Danielle M. Chapman, William L. Griffin, David F. Dalury
Summary: Despite informing patients about the importance of follow-up after total hip arthroplasty (THA), the actual follow-up rate is only 19%. Despite widespread dissemination of information on the potential risks of metal-on-metal (MOM) THA, only 26% of patients had been seen within the past 2 years. The specific implications of poor follow-up remain unclear.
Review
Polymer Science
Md Mohiuddin Soliman, Muhammad E. H. Chowdhury, Mohammad Tariqul Islam, Farayi Musharavati, Mohammad Nabil, Muhammad Hafizh, Amith Khandakar, Sakib Mahmud, Erfan Zal Nezhad, Md Nazmul Islam Shuzan, Farhan Fuad Abir
Summary: Total hip replacement is a common orthopedic surgery technique that replaces shattered cartilage and bone with an implant. Material selection plays a crucial role in the mechanical and clinical performance of hip implants. This research uses computational finite element analysis, in vitro, in vivo, and clinical stages to evaluate the performance of different biomaterials in total hip implant systems, providing valuable insights for researchers in this field.
Article
Chemistry, Physical
Razvan Pacurar, Petru Berce, Anna Petrilak, Ovidiu Nemes, Cristina Stefana Miron Borzan, Marta Harnicarova, Ancuta Pacurar
Summary: The research optimizes the manufacturing process of medical implants using selective laser sintering technology, from designing and manufacturing test samples to conducting compression tests and SEM analyses to optimize surface roughness of parts through finite element analysis and determining optimum contact pressure.
Article
Orthopedics
Lukas Weiser, Jakob V. Nuechtern, Kay Sellenschloh, Klaus Puschel, Michael M. Morlock, Johannes M. Rueger, Michael Hoffmann, Wolfgang Lehmann, Lars G. Groterlinden
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2017)
Article
Engineering, Biomedical
Dennis Buente, Michael Bryant, Michael Ward, Anne Neville, Michael Morlock, Gerd Huber
MEDICAL ENGINEERING & PHYSICS
(2017)
Article
Clinical Neurology
Michael Reichl, Rebecca A. Kueny, Reza Danyali, Peter Obid, Hueseyin Uebeyli, Klaus Pueschel, Michael M. Morlock, Gerd Huber, Thomas Niemeyer, Alexander Richter
CLINICAL SPINE SURGERY
(2017)
Article
Cardiac & Cardiovascular Systems
Klaas Loger, Georg Lutter, Katharina Huenges, Derk Frank, Justus Gross, Jochen Cremer, Tim Attmann, Michael Morlock, Saskia Pokorny
EUROPEAN JOURNAL OF CARDIO-THORACIC SURGERY
(2018)
Article
Clinical Neurology
Lukas Weiser, Gerd Huber, Kay Sellenschloh, Lennart Viezens, Klaus Pueschel, Michael M. Morlock, Wolfgang Lehmann
EUROPEAN SPINE JOURNAL
(2018)
Article
Engineering, Mechanical
Sebastian Oberst, Johanna Baetz, Graeme Campbell, Frank Lampe, Joseph C. S. Lai, Norbert Hoffmann, Michael Morlock
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2018)
Article
Engineering, Biomedical
A. Krull, M. M. Morlock, N. E. Bishop
MEDICAL ENGINEERING & PHYSICS
(2018)
Article
Cell & Tissue Engineering
A. Krull, M. M. Morlock, N. E. Bishop
BONE & JOINT RESEARCH
(2018)
Article
Orthopedics
Michael M. Morlock, Emilie C. Dickinson, Klaus-Peter Guenther, Dennis Buente, Valerie Polster
JOURNAL OF ARTHROPLASTY
(2018)
Article
Biophysics
Maren Bechstedt, Jonathan A. Gustafson, Steven P. Mell, Julian Guehrs, Michael M. Morlock, Brett R. Levine, Hannah J. Lundberg
JOURNAL OF BIOMECHANICS
(2020)
Article
Chemistry, Physical
Thomas M. Grupp, Marc Baxmann, Volkmar Jansson, Henning Windhagen, Karl-Dieter Heller, Michael M. Morlock, Hanns-Peter Knaebel
Article
Orthopedics
M. M. Morlock, E. Gomez-Barrena, D. C. Wirtz, A. Hart, J. P. Kretzer
Summary: In the early days of total joint replacement, issues such as implant fracture, material problems, and wear posed significant challenges to the success of the operation. However, with the advancements in material, design, and standardized testing methods, the failures directly attributed to the implant now account for only a small percentage of revision surgeries. Arthroplasty registers play a crucial role in documenting the long-term clinical performance of implants and techniques. Analyzing explants from revision surgeries due to implant failure is necessary for identifying failure mechanisms early and improving risk assessment in the regulatory process.
EFORT OPEN REVIEWS
(2022)
Article
Engineering, Biomedical
Claudius Steffen, Kay Sellenschloh, Magdalena Willsch, Ana Prates Soares, Michael M. Morlock, Max Heiland, Kilian Kreutzer, Gerd Huber, Carsten Rendenbach
Summary: This study aimed to examine whether patient-specific 3D-printed miniplates provide increased interosteotomy movement (IOM) and lower stiffness compared to reconstruction plates. The findings showed that miniplate fixation resulted in higher IOM in the distal gap, while there was no significant difference between the groups in the mesial gap. Surgeons should evaluate the primary use of 3D-printed miniplates in mandibular reconstruction due to advantages of intraoral plate removal and safe osteosynthesis.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Orthopedics
M. Ruhr, G. Huber, Y. Niki, L. Lohner, B. Ondruschka, M. M. Morlock
Summary: The study aimed to investigate the impact of altering impaction procedure on the primary stability of press-fit acetabular components. The results showed that overimpaction reduced primary stability, while high-frequency impaction was beneficial in reducing plastic deformation.
BONE & JOINT JOURNAL
(2023)
Article
Multidisciplinary Sciences
Julius M. Boettcher, Kay Sellenschloh, Gerd Huber, Benjamin Ondruschka, Michael M. Morlock
Summary: This study found that adding a second set of less prominent splines can improve the primary stability of a revision hip stem in the femoral diaphysis, especially in the presence of significant proximal bone loss. Varying the size and number of splines has the potential to further enhance the longevity of revision hip stems.