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https://www.readbyqxmd.com/read/28529109/late-dislocations-after-total-hip-arthroplasty-is-the-bearing-a-factor
#1
Siddharth M Shah, William L Walter, Stephen M Tai, Michelle F Lorimer, Richard N de Steiger
BACKGROUND: Dislocation is a leading cause of revision after primary total hip arthroplasty (THA). Although more common in the first few years after the procedure, dislocation can occur at any time. This study investigated the difference in late dislocation in ceramic-on-ceramic (CoC) bearings compared with metal-on-polyethylene and ceramic-on-polyethylene bearings in THA. METHODS: Data were used from the Australian Orthopaedic Association National Joint Replacement Registry, and the cumulative percent revision for dislocation was estimated using the Kaplan-Meier method for the different bearing surfaces...
April 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28511948/computer-navigation-helps-reduce-the-incidence-of-noise-after-ceramic-on-ceramic-total-hip-arthroplasty
#2
Siddharth M Shah, Kamal Deep, Chaiyaporn Siramanakul, Vivek Mahajan, Frederic Picard, David J Allen
BACKGROUND: Noise after ceramic-on-ceramic (CoC) total hip arthroplasty (THA) is a well-recognized problem. Computer navigation has been shown to achieve desired implant orientation. Our aim was (1) to compare the incidence of noise between navigated and conventional CoC THAs and (2) to determine the factors associated with noise. METHODS: All patients undergoing CoC THA between March 2009 and August 2012 were considered for this study. Information regarding hip noise was obtained via telephone or postal interview...
April 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28500998/the-impact-of-surface-and-geometry-on-coefficient-of-friction-of-artificial-hip-joints
#3
Dipankar Choudhury, Martin Vrbka, Azuddin Bin Mamat, Ian Stavness, Chanchal K Roy, Rajshree Mootanah, Ivan Krupka
Coefficient of friction (COF) tests were conducted on 28-mm and 36-mm-diameter hip joint prostheses for four different material combinations, with or without the presence of Ultra High Molecular Weight Polyethylene (UHMWPE) particles using a novel pendulum hip simulator. The effects of three micro dimpled arrays on femoral head against a polyethylene and a metallic cup were also investigated. Clearance played a vital role in the COF of ceramic on polyethylene and ceramic on ceramic artificial hip joints. Micro dimpled metallic femoral heads yielded higher COF against a polyethylene cup; however, with metal on metal prostheses the dimpled arrays significantly reduced the COF...
May 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28489745/adverse-local-tissue-reaction-after-2-revision-hip-replacements-for-ceramic-liner-fracture-a-case-report
#4
Iulian Antoniac, Mihai Negrusoiu, Mihai Mardare, Claudiu Socoliuc, Ancuţa Zazgyva, Marius Niculescu
INTRODUCTION: In younger patients, ceramic-on-ceramic (CoC) bearing surfaces are usually recommended for total hip replacement (THR) because of their low wear rate and longer expected functional life. Although technical advancements have reduced the risk of ceramic bearings fracture, this complication remains a major concern. CASE DESCRIPTION: We present the case of a 56-year-old patient undergoing 3 revision hip arthroplasties of the right hip due to ceramic liner fractures...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28485068/wear-resistance-of-poly-2-methacryloyloxyethyl-phosphorylcholine-grafted-carbon-fiber-reinforced-poly-ether-ether-ketone-liners-against-metal-and-ceramic-femoral-heads
#5
Shihori Yamane, Masayuki Kyomoto, Toru Moro, Masami Hashimoto, Yoshio Takatori, Sakae Tanaka, Kazuhiko Ishihara
Younger, active patients who undergo total hip arthroplasty (THA) have increasing needs for wider range of motion and improved stability of the joint. Therefore, bearing materials having not only higher wear resistance but also mechanical strength are required. Carbon fiber-reinforced poly(ether ether ketone) (CFR-PEEK) is known as a super engineering plastic that has great mechanical strength. In this study, we focused on poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC)-grafted CFR-PEEK and investigated the effects of PMPC grafting and the femoral heads materials on the wear properties of CFR-PEEK liners...
May 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28463695/influence-of-the-compliance-of-a-patient-s-body-on-the-head-taper-fixation-strength-of-modular-hip-implants
#6
Annika Krull, Nicholas E Bishop, Niels M Steffen, Frank Lampe, Klaus Püschel, Michael M Morlock
BACKGROUND: The strength of the modular fixation between head and stem taper of total hip replacement implants should be sufficient to minimise relative motion and prevent corrosion at the interface. Intraoperatively the components are assembled by impaction with a hammer. It is unclear whether the effective compliance of the patient's body modifies the strength of the taper interface under impaction assembly. The purpose of this study was to assess the influence of the compliance of the patient's body on the taper fixation strength...
April 25, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28462520/zirconia-phase-transformation-in-retrieved-wear-simulated-and-artificially-aged-ceramic-femoral-heads
#7
Maria Parkes, Kathryn Sayer, Markus Goldhofer, Philippa Cann, William L Walter, Jonathan Jeffers
Zirconia in Zirconia toughened alumina ceramic hip replacements exists in an unstable state and can transform in response to stress giving the material improved fracture toughness. Phase transformation also occurs under hydrothermal conditions such as exist in vivo. To predict the hydrothermal aging that will occur in vivo accelerated aging procedures have been used, but validation of these models requires the study of retrieved hip joints. Here 26 retrievals are analysed to determine the degree of phase transformation in vivo...
April 29, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28390755/persistent-noise-after-ceramic-on-ceramic-total-hip-replacement-due-to-bearing-coupling-size-mismatch-a-case-report
#8
Chee-Ken Chan, Dong-Hyun Lee, Taek-Rim Yoon, Kyung-Soon Park
No abstract text is available yet for this article.
April 5, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28377999/catastrophic-failure-of-an-acetabular-total-hip-arthroplasty-component-mimicking-a-posterior-dislocation
#9
Christopher Joyce, Jared L Harwood, Andrew H Glassman
In our case study, we examine a case of catastrophic failure of a total hip arthroplasty acetabular component leading to complete central wear by the ceramic femoral head, requiring revision total hip arthroplasty. Despite subtle clinical findings, initial orthopaedic evaluation and treatment yielded a diagnosis of total hip arthroplasty dislocation. While a much more common phenomenon, the diagnosis led to futile initial attempts at closed reduction. Our index of suspicion must remain high to pick up on subtle, less common diagnoses we will encounter...
March 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28375892/metal-artifact-reduction-sequence-mri-abnormalities-in-asymptomatic-patients-with-a-ceramic-on-polyethylene-total-hip-replacement
#10
Jason M Jennings, J Ryan Martin, Raymond H Kim, Charlie C Yang, Todd M Miner, Douglas A Dennis
BACKGROUND: Magnetic resonance imaging (MRI) is a commonly utilized screening modality in patients with a metal-on-metal (MoM) total hip replacement. The prevalence of clinically important fluid collections may be overestimated since these collections have been reported to occur in asymptomatic patients with MoM and other bearing surfaces. The purpose of this study was to determine the frequency and types of MRI-documented adverse local tissue reactions in asymptomatic patients with a ceramic-on-polyethylene (CoP) total hip replacement...
April 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28373980/clinical-results-and-serum-metal-ion-concentrations-following-ceramic-on-metal-total-hip-arthroplasty-at-a-mean-follow-up-of-60-months
#11
W Maurer-Ertl, D Pranckh-Matzke, J Friesenbichler, G Bratschitsch, L A Holzer, M Maier, A Leithner
Background. Increased metal ion levels following total hip arthroplasty (THA) with metal-on-metal bearings are a highly debated topic. Local soft tissue reactions with chronic pain and systemic side effects such as neuropathy are described. The aim of the current study was to determine the serum metal ion concentrations of Cobalt (Co) and Chrome (Cr) after THA with a ceramic-on-metal (CoM) bearing. Patients and Methods. Between 2008 and 2010, 20 patients underwent THA using a CoM bearing. Clinical function was evaluated by standardized scores systems (Harris Hip Score and WOMAC Score) and radiological examination included X-rays...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28359859/raman-spectroscopy-of-biomedical-polyethylenes
#12
REVIEW
Giuseppe Pezzotti
With the development of three-dimensional Raman algorithms for local mapping of oxidation and plastic strain, and the ability to resolve molecular orientation patterns with microscopic spatial resolution, there is an opportunity to re-examine many of the foundations on which our understanding of biomedical grade ultra-high molecular weight polyethylenes (UHMWPEs) are based. By implementing polarized Raman spectroscopy into an automatized tool with an improved precision in non-destructively resolving Euler angles, oxidation levels, and microscopic strain, we become capable to make accurate and traceable measurements of the in vitro and in vivo tribological responses of a variety of commercially available UHMWPE bearings for artificial hip and knee joints...
March 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28343829/corrigendum-to-metal-on-metal-or-ceramic-on-ceramic-for-cementless-total-hip-arthroplasty-a-meta-analysis-the-journal-of-arthroplasty-31-2016-2637-2645
#13
Young-Kyun Lee, Byung-Ho Yoon, Yun Seong Choi, Woo-Lam Jo, Yong-Chan Ha, Kyung-Hoi Koo
No abstract text is available yet for this article.
March 23, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28326429/ceramic-on-ceramic-bearings-total-hip-arthroplasty-in-young-patients
#14
Tao Wang, Jun-Ying Sun, Xi-Jiang Zhao, Yong Liu, Hai-Bo Yin
BACKGROUND: The results of ceramic-on-ceramic (CoC) total hip arthroplasty (THA) in younger patients were not univocal. This study aims to evaluate the results of CoC bearing THA in patients younger than 50 years. METHODS: A total of 90 younger patients performed CoC THAs during March 2003 and May 2008 were included in this study. Hip function and activity were evaluated with Harris hip score and University of California Los Angeles activity score. We had discussed survival rates, radiological findings of component loosening or osteolysis, and ceramic-related complications in these patients...
December 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28326410/growth-of-an-intrapelvic-pseudotumor-associated-with-a-metal-on-metal-total-hip-arthroplasty-after-revision-arthroplasty-causing-a-femoral-nerve-neuropathy
#15
Patrick Leung, James C Kudrna
The development of pseudotumors is not uncommon with metal-on-metal total hip arthroplasty. Pseudotumors that dissect into the retroperitoneal space can cause symptoms of nerve compression. We describe a case of a 53-year-old male with a metal-on-metal total hip arthroplasty who developed mild symptoms of a femoral nerve neuropathy 6 years postoperatively. Revision arthroplasty to a ceramic-on-polyethylene articulation and debridement of the pseudotumor was performed. Postoperatively, the patient's femoral neuropathy progressed and a repeat magnetic resonance imaging showed an increase in size of the pseudotumor despite the removal of the offending metal-on-metal articulation...
September 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28326406/histologic-evaluation-of-the-bone-ceramic-interface-of-an-alumina-ceramic-cup-arthroplasty-retrieved-after-25-years-in%C3%A2-vivo
#16
Fuminori Higuchi, Shigeo Fukunishi, Shoji Nishio, Tomokazu Fukui, Yuki Fujihara, Shohei Okahisa, Yu Takeda, Shinichi Yoshiya
A 47-year-old man underwent ceramic cup arthroplasty when he was 22 years old. Revision total hip arthroplasty was performed 25 years later because of limited range of motion without implant loosening. Histologic examination revealed that the femoral head and ceramic implant were well fixed through a thin fibrous membrane. The energy-dispersive X-ray analysis indicated that calcium and phosphorus were detected in the same peak pattern as cancellous bone in the bone-ceramic interface.
September 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28300706/tapered-stems-one-third-proximally-coated-have-higher-complication-rates-than-cylindrical-two-third-coated-stems-in-patients-with-high-hip-dislocation-undergoing-total-hip-arthroplasty-with-step-cut-shortening-osteotomy
#17
V Emre Ozden, G Dikmen, B Beksac, I Remzi Tozun
BACKGROUND: The results of cementless stems in total hip arthroplasty (THA) done because of congenital dislocation with step-cut osteotomy is not well known, particularly the influence of the design and the role of extent of porous coating. Therefore we performed a retrospective study to evaluate the mid to long-term results THA performed with a single type acetabular component and different geometry and fixation type stems with ceramic bearings in the setting of step-cut subtrochanteric osteotomy in high hip dislocated (HHD) patients...
March 11, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28300705/comparison-of-wear-rate-and-osteolysis-between-second-generation-annealed-and-first-generation-remelted-highly-cross-linked-polyethylene-in-total-hip-arthroplasty-a-case-control-study-at-a-minimum-of-five-years
#18
R Takada, T Jinno, D Koga, K Miyatake, T Muneta, A Okawa
BACKGROUND: There is no previous report that directly compared wear resistance of second-generation annealed highly cross-linked polyethylene with that of first-generation remelted highly cross-linked polyethylene. We therefore performed a retrospective study at a minimum of 5-year follow-up comparing second-generation annealed and first-generation remelted highly cross-linked polyethylene in order to: (1) assess wear rates and (2) compare the incidence of osteolysis between, (3) identify the frequency of complication related to the two types of highly cross-linked polyethylene...
March 11, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28278491/medium-term-results-of-ceramic-on-polyethylene-zweym%C3%A3-ller-plus-total-hip-arthroplasty
#19
H Li, S Zhang, X M Wang, J H Lin, B L Kou
INTRODUCTION: The need for better durability and longevity in total hip arthroplasty for patients with various hip joint diseases remains a challenge. This study aimed to obtain medium-term results at a follow-up of >10 years for Zweymüller-Plus total hip arthroplasty with ceramic-on-polyethylene bearing. METHODS: A retrospective study was conducted to review the results after a minimum of 12.4 years of 207 consecutive total hip arthroplasties in 185 patients in Peking University People's Hospital in China using the Zweymüller SL-Plus stem in combination with the Bicon-Plus threaded cup and ceramic-on-polyethylene bearing between October 1994 and April 2000...
March 10, 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28261423/cementless-total-hip-arthroplasty-involving-trochanteric-osteotomy-without-subtrochanteric-shortening-for-high-hip-dislocation
#20
Soong Joon Lee, Jeong Joon Yoo, Hee Joong Kim
BACKGROUND: Total hip arthroplasty with subtrochanteric shortening osteotomy is widely performed for high hip dislocation. However, suboptimal leg length discrepancy correction and nonunion of the osteotomy site remain concerns. Although total hip arthroplasty using trochanteric osteotomy without subtrochanteric osteotomy was introduced, cemented implants have been more commonly used than contemporary cementless implants in this procedure. We evaluated the long-term results of cementless total hip arthroplasty with trochanteric osteotomy without subtrochanteric osteotomy for high hip dislocation...
March 2017: Clinics in Orthopedic Surgery
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