Article
Engineering, Biomedical
Francesco Castagnini, Barbara Bordini, Monica Cosentino, Cristina Ancarani, Federica Mariotti, Federico Biondi, Cesare Faldini, Francesco Traina
Summary: Recurrent dislocations remain a common reason for revision in total hip arthroplasty, with ceramic-on-ceramic bearings showing a lower risk of revisions due to dislocation in adjusted models compared to ceramic-on-polyethylene. However, there was no significant difference in the rate of revisions for dislocation between bearings with cross-linked polyethylene and Delta-on-Delta articulations in both unadjusted and adjusted models. Additional studies are needed to draw definitive conclusions about the influence of bearing surfaces on revisions due to dislocations.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2021)
Article
Engineering, Biomedical
Shawn Ming Song Toh, Ariyan Ashkanfar, Russell English, Glynn Rothwell
Summary: In this study, a fretting wear algorithm was developed to investigate wear damage on bearing surfaces of THRs, predicting linear and volumetric wear rates effectively. Results showed comparable wear rates to in-vivo THRs and matched wear patterns from conventional polyethylene liners, offering potential for reducing wear rates in THR design and clinical techniques.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Review
Orthopedics
Che Zheng, Jiawen Xu, Liming Wu, Yuangang Wu, Yuan Liu, Bin Shen
Summary: This study aimed to compare different bearing surfaces after cementless total hip arthroplasty. A network meta-analysis was conducted to assess 64 eligible trials. The findings showed that bearings containing highly cross-linked polyethylene (HXP), vitamin E-infused highly cross-linked polyethylene (HXPE), and ceramic liners demonstrated comparable survivorship and hip function at 5 and 10 years follow-up. Hard-on-hard bearings containing metal had higher serum levels of metal ions.
JOURNAL OF ARTHROPLASTY
(2023)
Article
Materials Science, Ceramics
Bryan Heer, Yanning Zhang, Amit Bandyopadhyay
Summary: The study successfully created a composite material with improved hardness and wear resistance by utilizing the advantages of Al2O3 and SiO2 ceramics with Ti6Al4V (Ti64) alloy, with an additional laser pass (LP) further increasing the hardness.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Biomedical
Charlotte Skjoldebrand, Joanne L. Tipper, Peter Hatto, Michael Bryant, Richard M. Hall, Cecilia Persson
Summary: Hip and knee joint replacements are common and successful surgeries, but the release of metallic ions and particles from the implants can cause hypersensitivity and tissue necrosis. Coatings have the potential to improve implant properties and act as barriers to inhibit ion release. There are commercially available coatings for clinical use and ongoing research on new coatings. Adhesion of coatings remains a concern, but zirconium and TiNbN coatings have shown comparable results to traditional implants in terms of revision numbers and allergy symptom relief.
MATERIALS TODAY BIO
(2022)
Article
Orthopedics
Vinaya Rajahraman, Safa C. Fassihi, Vaidehi Patel, Caleigh A. Pope, Joshua C. Rozell, Ran Schwarzkopf
Summary: This study assessed the accuracy of ICD-10-PCS coding for femoral head bearing surfaces in hip procedures. The coding accuracy for ceramic femoral heads was higher compared to cobalt chrome/metal and OxZi femoral heads.
JOURNAL OF ARTHROPLASTY
(2023)
Review
Engineering, Mechanical
Quentin Allen, Bart Raeymaekers
Summary: Total hip replacement surgeries are common in the United States to treat degenerative joint diseases, but the limited longevity of implants remains a significant issue. Innovations in materials and coatings have helped reduce wear, but there is still a need to improve longevity through texture features and manufacturing techniques.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Orthopedics
Patricia Campbell, Sang-Hyun Park, Edward Ebramzadeh
Summary: This study examined the tissue characteristics of revised metal-on-metal total hips using multiple histological scoring methods, finding that ALVAL scores reflected a histology dominated by macrophages and showed significant correlation with wear rate per year. There was a moderate correlation between wear particles and wear volume with the number of macrophages, while no significant correlation was found between wear and other features such as lymphocytic inflammation or necrosis.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2022)
Review
Orthopedics
Michael A. Stone, Ali S. Noorzad, Surena Namdari, Joseph Abboud
Summary: Total shoulder arthroplasty (TSA) and reverse TSA are effective treatments for glenohumeral osteoarthritis, but longevity may be limited by osteolysis and polyethylene wear. New bearing surfaces like highly cross-linked ultra-high-molecular-weight polyethylene, vitamin E processing, ceramic heads, and pyrolytic carbon surfaces have shown improved wear characteristics in studies.
JOURNAL OF THE AMERICAN ACADEMY OF ORTHOPAEDIC SURGEONS
(2021)
Article
Medicine, General & Internal
Rebecca H. Dammer, Carmen Zietz, Jorn Reinders, Michael Teske, Rainer Bader
Summary: This study investigated the wear behavior of accelerated aging SX-PE liners in simulator testing. The results showed that the wear rates initially increased and then decreased, indicating promising effects of accelerated aging on SX-PE liners for potential long-term clinical applications.
JOURNAL OF CLINICAL MEDICINE
(2022)
Review
Physics, Multidisciplinary
Brian Uthe, John E. Sader, Matthew Pelton
Summary: Standard continuum assumptions may not apply to fluid flows at the nanoscale, as even simple molecular liquids can exhibit non-Newtonian viscoelastic responses and nanometer-scale slip. Optical measurements of metal nanoparticles' mechanical vibrations provide insights into the rheology and slip behavior of simple liquids at the nanoscale.
REPORTS ON PROGRESS IN PHYSICS
(2022)
Article
Engineering, Biomedical
Alican Tuncay Alpkaya, Senay Mihcin
Summary: Understanding wear mechanisms is crucial for preventing primary failures and revision surgery in total hip replacement (THR). This study presents a wear prediction model for PEEK-on-XLPE bearing couple, simulating a 3D-gait cycle loading over 5 million cycles. The predicted volumetric and linear wear rates of XLPE liner per million cycles were 1.965 mm3/Mc and 0.0032 mm/Mc respectively. These results are consistent with existing literature. PEEK-on-XLPE shows promising wear performance in THR application and could be considered as an alternative material to CoCr head in XLPE-bearing couples. The wear prediction model can be utilized to optimize design parameters and extend the lifespan of hip implants.
MEDICAL ENGINEERING & PHYSICS
(2023)
Article
Orthopedics
Marcello De Fine, Silvio Terrando, Martin Hintner, Alessandro Alan Porporati, Giovanni Pignatti
Summary: The study tested the wear behavior of ceramic on ceramic articulations under worst-case wear scenarios with added third-body particles and subluxation stresses, concluding that AMC articulations perform very well in such conditions.
ORTHOPAEDICS & TRAUMATOLOGY-SURGERY & RESEARCH
(2021)
Article
Orthopedics
Shinichi Ikeda, Nobuhiro Kaku, Tsuguaki Hosoyama, Hiroshi Tsumura
Summary: This study investigated the survival rates of total hip arthroplasty with the same femoral stem and the predictive factors for revision of stemmed metal-on-metal THA. The results showed that stemmed MoM THA has a very low survival rate, and the use of MoM bearings is a risk factor for revision.
ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY
(2023)
Article
Orthopedics
Emanuele Chisari, Justin A. Magnuson, Christian B. Ong, Javad Parvizi, Chad A. Krueger
Summary: This study compared infection occurrence between Metal-on-polyethylene (MoP) and ceramic-on-polyethylene (CoP) total hip arthroplasty implants. It found a higher risk of periprosthetic joint infection in MoP patients, even after adjusting for confounders, indicating a significant association. The recruitment of leukocytes to these implants may play a role and warrants further investigation.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2022)
Article
Health Care Sciences & Services
Ilona Swiatkowska, Johann Henckel, Shiraz A. Sabah, Alister J. Hart
Summary: This study investigated the prevalence of self-reported neurotoxicity and cognitive defects in hip replacement patients with markedly raised blood cobalt. The results showed that the frequency of reporting symptoms was significantly higher in patients with metal-on-metal implants, but clinically significant neurotoxicity was not observed.
JOURNAL OF PATIENT SAFETY
(2022)
Correction
Orthopedics
Michael T. Hirschmann, Alister Hart, Johann Henckel, Patrick Sadoghi, Romain Seil, Caroline Mouton
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Kevin C. Ilo, Harry S. Hothi, John A. Skinner, Alister J. Hart
Summary: This study compared different modular metal-on-metal implants from the same manufacturer and found that modular implants had a higher incidence of adverse local tissue reaction, which may be related to the modular junctions, especially the neck-stem junction, which was more susceptible to corrosion.
Article
Orthopedics
Laura M. Horga, Johann Henckel, Anastasia Fotiadou, Anna Di Laura, Anna C. Hirschmann, Robert Lee, Alister J. Hart
Summary: Running 500 miles over 4 months plus a marathon for the first time had no adverse effects on the lumbar spine, even when early degenerative changes were present. Additionally, there was evidence of regression of sacroiliac joint abnormalities.
SKELETAL RADIOLOGY
(2022)
Article
Biophysics
Martin A. Belzunce, Johann Henckel, Anna Di Laura, Alister J. Hart
Summary: This study characterized the hip abductor muscles in healthy individuals, establishing reference values for volume, intramuscular fat content, and shape. It found that females had significantly higher fat content in the muscles compared to males, with age not showing a significant difference. The research provides valuable tools for quantifying and detecting early signs of hip disease or sarcopenia.
NMR IN BIOMEDICINE
(2022)
Article
Orthopedics
Dominic T. Mathis, Joshua Schmidli, Felix Amsler, Johann Henckel, Harry Hothi, Alister Hart, Michael T. Hirschmann
Summary: This study compares the amount of cement adhesions, geometry, and surface features between two different knee designs, and correlates them with the reasons for revision surgery.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Orthopedics
Harry Hothi, Johann Henckel, Sean Bergiers, Anna Di Laura, Klaus Schlueter-Brust, Alister Hart
Summary: This study aims to investigate the presence of voids in commercially available custom acetabular cups. The research found that some cups indeed have structural voids, which may increase the risk of crack initiation in the cups.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Article
Orthopedics
Martina Tognini, Harry Hothi, Sean Bergiers, Edel Broomfield, Stewart Tucker, Johann Henckel, Alister Hart
Summary: Retrospective analysis of explanted magnetically controlled growing rods (MCGRs) aimed to understand their fracture mechanisms and related risk factors. Findings showed that all fractured rods were single-rod constructs and greater rod contouring angles and distances between anchoring points were significant factors contributing to the fractures. Therefore, implanting double rod constructs in patients with mature spines is preferable to avoid this complication.
JOURNAL OF PEDIATRIC ORTHOPAEDICS
(2023)
Article
Biotechnology & Applied Microbiology
Sean Bergiers, Johann Henckel, Harry Hothi, Anna Di Laura, Chris Goddard, David Raymont, Furqan Ullah, Ross Cotton, Rebecca Bryan, Alister Hart
Summary: This study aimed to identify the most common locations of wear in vivo by using CT imaging, retrieval analysis, and statistical shape modelling (SSM). The results showed that wear volume, positioning, time, gender, and size had an impact on the location of wear. Understanding the function of hip implants can inform future design and improve the safe zone for implant positioning.
BIOENGINEERING-BASEL
(2023)
Article
Orthopedics
Martin A. Belzunce, Johann Henckel, Anna Di Laura, Laura M. Horga, Alister James Hart
Summary: Physical activity and a healthy lifestyle are important for delaying sarcopenia. This study aimed to quantify the benefits of cycling on muscle health in middle-aged men. The results showed that cyclists had lower levels of intramuscular fat infiltration and larger muscle mass compared to physically inactive individuals.
BMC MUSCULOSKELETAL DISORDERS
(2023)
Article
Orthopedics
Sara De Angelis, Johann Henckel, Sean Bergiers, Harry Hothi, Anna Di Laura, Alister Hart
Summary: The assessment of three-dimensional bony defects is important for surgical planning of hip reconstruction. Previous methods using mirroring of the contralateral side may not be useful when diseased or replaced. Statistical Shape Models (SSMs) can aid reconstruction by deriving landmarks for patients with large acetabular defects. Our study found that SSMs can effectively reconstruct bony landmarks in patients with significant lysis, regardless of defect severity. This can assist in surgical planning and implant design for hip reconstruction.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Article
Engineering, Biomedical
Maria Moralidou, Anna Di Laura, Johann Henckel, Alister J. Hart
Summary: Three-Dimensional Computed Tomography planning can predict prosthetic femoral size in un-cemented primary Total Hip Arthroplasty. However, the relationship between Prosthetic Femoral Version and Native Femoral Version is not well understood. This study aimed to assess this relationship using 3D-CT analysis.
MEDICAL ENGINEERING & PHYSICS
(2023)
Article
Critical Care Medicine
Matthew J. Wood, Talal Al-Jabri, Ahmed Zaghloul, Brent Lanting, Peter V. Giannoudis, Alister James Hart
Summary: Periprosthetic acetabular fractures are rare but potentially serious complications of total hip arthroplasty. There is a lack of literature on these fractures compared to periprosthetic femoral fractures after total hip arthroplasty. This article provides an up-to-date review of the epidemiology, risk factors, diagnostic challenges, classifications, and management strategies for periprosthetic acetabular fractures after total hip arthroplasty.
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED
(2023)
Article
Orthopedics
Angelika Ramesh, Anna Di Laura, Johann Henckel, Alister Hart
Summary: CT is commonly used for pre-operative planning and assessment of THA, but there is a need for a harmonised low-dose protocol due to the variability in existing protocols. Most protocols are incomplete and only a small percentage are optimised for both field of view and image acquisition parameters. The variability emphasizes the need for a more consistent and optimal protocol for THA planning.
EFORT OPEN REVIEWS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Harry Hothi, Arianna Cerquiglini, Lukas Buel, Johann Henckel, Lukas B. Moser, Michael T. Hirschmann, Alister Hart
Summary: This study aimed to investigate the relationship between bone tracer uptake distribution patterns in SPECT/CT and retrieval findings. The results showed that in patients with asymmetric distribution, those with more extended BTU in the medial compartment had significantly thinner insertions in the medial compartment, and vice versa in the lateral side. This study supports the hypothesis that SPECT/CT can identify bone activity due to implant position and loading.
