Article
Engineering, Biomedical
Therese Bormann, Laura Nebel, Ulrike Mueller, Phuong Thao Mai, Jens Gibmeier, Tobias Renkawitz, J. Philippe Kretzer
Summary: Corrosion at the modular taper junctions in total hip arthroplasty is clinically relevant. In vitro tribo-corrosion tests using FeCl3 and H2O2 can provide more severe and realistic testing conditions compared to pure saline or calf serum.
ACTA BIOMATERIALIA
(2022)
Article
Orthopedics
C. M. Lawrie, R. L. Barrack, R. M. Nunley
Summary: The study showed that young, active patients undergoing modular DM total hip arthroplasty had favorable clinical outcomes and metal ion levels at mid-term follow-up, with excellent overall survivorship and minimal concerns regarding corrosion and metal ion release.
BONE & JOINT JOURNAL
(2021)
Article
Orthopedics
Matthew F. Koff, Madeleine A. Gao, John P. Neri, Yu-Fen Chiu, Bin Q. Lin, Alissa J. Burge, Edwin Su, Douglas E. Padgett, Hollis G. Potter
Summary: The study found a higher proportion of ALTR or metallosis on MRI in patients with HRA compared with patients with CoP, even when patient self-assessed symptomatology of those with an ALTR or metallosis on MRI was not different than the absence of these features. MRI detected ALTRs in high-function patients, emphasizing that an annual clinical assessment dependent on survey or blood ion testing alone may not detect soft tissue complications.
CLINICAL ORTHOPAEDICS AND RELATED RESEARCH
(2021)
Article
Engineering, Biomedical
Ulrike Mueller, Therese Bormann, Stefan Schroeder, J. Philippe Kretzer
Summary: The study found that impaction force is the most important factor in determining the strength of the taper connection, followed by the type of use and head material. While the contact situation has a slight impact on the torque-off moment, the surface topography of the stem taper plays a minor role in the strength of the taper connection.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Orthopedics
Annsley Mace, Charley M. Goodwin, Jeremy L. Gilbert
Summary: This study evaluated the assembly of two types of acetabular components with different geometries under a seating load. The results showed no significant difference in liner displacement between the two groups, and both designs exhibited minimal metal ion dissolution. This study provides important clinical insights into the impact of implant design on fretting corrosion.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Article
Orthopedics
Matthew T. Houdek, Michael J. Taunton, Cody C. Wyles, Paul J. Jannetto, David G. Lewallen, Daniel J. Berry
Summary: This study showed that in patients with ALTR, the levels of Co and Cr in synovial fluid were significantly higher compared to whole blood. The synovial fluid Co ion concentration was the most accurate predictor of ALTR.
JOURNAL OF ARTHROPLASTY
(2021)
Article
Engineering, Biomedical
Eileen S. Cadel, L. D. Timmie Topoleski, Oleg Vesnovsky, Charles R. Anderson, Robert H. Hopper, Charles A. Engh, Matthew A. Di Prima
Summary: Corrosion and wear are commonly found at the taper-trunnion connection of modular total hip arthroplasty explanted devices. M/M modular connections exhibit more damage than C/M connections, but both are susceptible to damage. Analysis techniques show that stem trunnions have more damage than head tapers, and C/M connections have less corrosion and wear compared to M/M connections.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2022)
Review
Orthopedics
Sravya P. Vajapey, Vivek M. Shah, Daniel M. Estok
Summary: Trunnion in total hip arthroplasty is the interface between the neck of a femoral stem and the femoral head. Complications arising from damage to this junction, known as MACC or trunnionosis, have increased with the use of modular hip prostheses. Factors such as taper design, implant metallurgical properties, and size mismatch of the bearing couple contribute to this condition.
JOURNAL OF THE AMERICAN ACADEMY OF ORTHOPAEDIC SURGEONS
(2023)
Article
Orthopedics
T. Grothe, K-P. Guenther, A. Hartmann, S. Blum, R. Haselhoff, J. Goronzy
Summary: The aim of this study was to evaluate the long-term incidence of adverse local tissue reaction (ALTR) in total hip arthroplasty (THA) patients using a V40 taper and identify potentially related factors. Results showed a high incidence of ALTR in patients after more than ten years postoperatively, suggesting the need for regular follow-up investigation in asymptomatic patients with V40 taper and metal heads.
BONE & JOINT JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Edgar Hornus, Ke Wang, Moreica Pabbruwe, Alan Kop, Chris Jones, Ashraf Salleh, Mobin Salasi, Mariano Iannuzzi
Summary: A new method was developed to study the complex corrosion mechanism found in modular hip arthroplasty, which showed severe corrosion of 316L stainless steel under dynamic conditions. The method was able to reproduce the extent and morphology of attack found in a retrieved implant.
Article
Materials Science, Multidisciplinary
Dekun Zhang, Yueru Zhang, Kai Chen, Xinyue Zhang, Handong Xu
Summary: The study found that using PEEK instead of CoCrMo as the head material for hip joint prostheses can significantly reduce fretting corrosion rate and improve corrosion resistance. Additionally, CoCrMo material released a higher quantity of metal ions in the lubricating medium compared to PEEK material.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Mechanical
Karl Dransfield, Katie Addinall, Paul Bills
Summary: This review examines the challenges associated with quantifying material loss at modular junctions and the methods used to overcome them. Total Hip Replacement is considered successful and cost-effective, with modular components offering surgeons a variety of implant combinations to optimize range of motion and soft tissue tension.
Article
Engineering, Biomedical
Ulrike Mueller, Therese Bormann, Stefan Schroeder, Tobias Renkawitz, J. Philippe Kretzer
Summary: This study aims to evaluate different analytical approaches for assessing fretting corrosion behavior in modular taper connections in total hip replacement and determine the impact of four design variables. The findings suggest that taper engagement situation is the main factor predicting metal ion release, and the selection of appropriate analytical methods is crucial for evaluating corrosion behavior.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Orthopedics
Francesco Castagnini, Monica Cosentino, Barbara Bordini, Maurizio Montalti, Federico Biondi, Cesare Faldini, Francesco Traina
Summary: This study compared the use of single-taper and dual-taper stems in patients with dysplasia and found that the dual-taper stems had higher long-term survival rates and lower rates of aseptic loosening, but had a higher risk of implant breakage.
Article
Orthopedics
Wayne Hoskins, Sophia Rainbird, Carl Holder, Stephen E. Graves, Roger Bingham
Summary: This study comparing the revision rates for aseptic loosening of highly porous acetabular combinations in primary THA found that highly porous-coated titanium acetabular components have low rates of aseptic loosening with long-term follow-up, but there may be differences between different component combinations.
JOURNAL OF ARTHROPLASTY
(2022)
Article
Cardiac & Cardiovascular Systems
Saskia Pokorny, Katharina Huenges, Jan Hinerk Hansen, Yannik Schadow, Gunther Fischer, Michael M. Morlock, Jochen Cremer, Georg Lutter
EUROPEAN JOURNAL OF CARDIO-THORACIC SURGERY
(2017)
Article
Orthopedics
Niklas B. Damm, Michael M. Morlock, Nicholas E. Bishop
JOURNAL OF ORTHOPAEDIC RESEARCH
(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.
Article
Engineering, Biomedical
Annika Krull, Nicholas E. Bishop, Niels M. Steffen, Frank Lampe, Klaus Pueschel, Michael M. Morlock
CLINICAL BIOMECHANICS
(2017)