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https://www.readbyqxmd.com/read/28345781/apoptotic-pathways-of-macrophages-within-osteolytic-interface-membrane-in-periprosthestic-osteolysis-after-total-hip-replacement
#1
Guoyin Liu, Ting Guo, Yong Zhang, Naicheng Liu, Jiangning Chen, Jianmin Chen, Junfeng Zhang, Jianning Zhao
Macrophage apoptosis in interface membrane, which occurs through either death receptor, mitochondrion, or endoplasmic reticulum (ER) stress pathways, has been suggested to play an important role in promoting osteolysis. However, how and why macrophage apoptosis originates and the correlation among these apoptotic pathways is not yet clear. The objective of this study was to identify the apoptotic mechanism of macrophages, and to explore the relationship between the apoptotic pathways and progression of osteolysis...
March 27, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28343828/the-morscher-press-fit-acetabular-component-an-independent-long-term-review-at-18-22-years
#2
REVIEW
David P Gwynne-Jones, Heath W R Lash, Andrew W James, Ella E Iosua, John A Matheson
BACKGROUND: There are relatively few 20-year results of uncemented acetabular components, and most of these are modular designs. This study reports the 20-year results of a monoblock press-fit acetabular component. METHODS: A total of 122 total hip arthroplasties (111 patients) using the Morscher cup were reviewed at a mean of 19.7 years. The average age at implantation was 57.3 years (range, 36-74 years), and 81 (66%) were men. RESULTS: Twenty-two patients (25 hips) had died...
March 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28328823/a-case-report-of-pycnodysostosis-with-atypical-femur-fracture-diagnosed-by-next-generation-sequencing-of-candidate-genes
#3
Hyung Keun Song, Young Bae Sohn, Yong Jun Choi, Yoon-Sok Chung, Ja-Hyun Jang
RATIONALE: Pycnodysostosis is a rare autosomal recessive skeletal dysplasia characterized by short stature, craniofacial dysmorphism, acro-osteolysis, osteosclerosis, and brittle bone with poor healing. Pycnodysostosis results from the deficient activity of cathepsin K, a lysosomal cysteine protease that is encoded by CTSK. PATIENT CONCERNS: We report a Korean adult patient with pycnodysostosis and atypical femur fracture whose diagnosis was confirmed by next-generation sequencing (NGS) of candidate genes...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28326429/ceramic-on-ceramic-bearings-total-hip-arthroplasty-in-young-patients
#4
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: Arthroplast Today
https://www.readbyqxmd.com/read/28321306/alveolar-soft-part-sarcoma-of-the-mediastinum-a-case-report
#5
Yohei Kameda, Teppei Nishii, Masahiro Tsuboi, Hiromasa Arai, Kenji Inui, Takeshi Kaneko, Noriko Kimura, Mitsuhide Naruse, Munetaka Masuda
We report a 53-year-old man with metastases of alveolar soft-part sarcoma originated from the mediastinum. He was hospitalized due to lower extremities' paralysis. Computed tomography scan findings revealed multiple nodules of bilateral lungs, swollen mediastinal lymph nodes, and osteolysis of thoracic vertebrae. We performed spinal decompression and biopsy from vertebra. And, we finally diagnosed this case as metastases of mediastinal alveolar soft-part sarcoma which was removed 10 years ago. Alveolar soft-part sarcoma is rare tumor accounted for 0...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28320522/-image-guided-bone-consolidation-in-oncology-cementoplasty-and-percutaneous-screw-fixation
#6
REVIEW
Xavier Buy, Roberto Luigi Cazzato, Vittorio Catena, Guilhem Roubaud, Michele Kind, Jean Palussiere
Bone metastases are a common finding in oncology. They often induce pain but also fractures which impair quality of life, especially when involving weight-bearing bones. Percutaneous image-guided consolidation techniques play a major role for the management of bone metastases. Cementoplasty aims to stabilize bone and control pain by injecting acrylic cement into a weakened bone. This minimally invasive technique has proven its efficacy for bones submitted to compression forces: vertebra, acetabular roof, and condyles...
March 17, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/28318864/weight-gain-after-primary-total-knee-arthroplasty-is-associated-with-accelerated-time-to-revision-for-aseptic-loosening
#7
Chin Tat Lim, Stuart B Goodman, James I Huddleston, Alex H S Harris, Subhrojyoti Bhowmick, William J Maloney, Derek F Amanatullah
BACKGROUND: Obesity is a major health problem worldwide and is associated with complications after total knee arthroplasty (TKA). It remains unknown whether a change in body mass index (BMI) after primary TKA affects the reasons for revision TKA or the time to revision TKA. METHODS: A total of 160 primary TKAs referred to an academic tertiary center for revision TKA were retrospectively stratified according to change in BMI from the time of their primary TKA to revision TKA...
February 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28316964/the-fixation-method-according-to-the-fracture-type-of-the-greater-trochanter-in-unstable-intertrochanteric-fractures-undergoing-arthroplasty
#8
Doohoon Sun, Byeong-Seop Park, Gun-Il Jang, Bongjoo Lee
PURPOSE: We conducted a study on patients who underwent hip joint arthroplasty because of unstable femur intertrochanteric fractures with greater trochanter bony fragments. After dividing patients into three groups depending on their fracture patterns, we evaluated the clinical and radiological outcomes of different operation methods applied to each of these groups. MATERIALS AND METHODS: Using Evan's classification, we defined an unstable intertrochanteric fracture as those characterized as stage 4 or 5...
March 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28316962/wiring-techniques-for-the-fixation-of-trochanteric-fragments-during-bipolar-hemiarthroplasty-for-femoral-intertrochanteric-fracture-clinical-study-and-technical-note
#9
Joong-Myung Lee, Yongsuk Cho, Junhyun Kim, Dong-Won Kim
PURPOSE: Femoral intertrochanteric fractures are common in the elderly. Appropriate surgical fixation of trochanteric fracture fragments can restore normal anatomical structure and ambulation, and can aid in the recovery of biomechanical function of the hip. We evaluated clinical outcomes of bipolar hemiarthroplasty using a wiring technique for trochanteric fracture fragment fixation. MATERIALS AND METHODS: From September 2006 to February 2015, a total of 260 cases underwent simultaneous bipolar hemiarthroplasty and wire fixation...
March 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28314855/def6-restrains-osteoclastogenesis-and-inflammatory-bone-resorption
#10
Nikolaus Binder, Christine Miller, Masaki Yoshida, Kazuki Inoue, Shinichi Nakano, Xiaoyu Hu, Lionel B Ivashkiv, Georg Schett, Alessandra Pernis, Steven R Goldring, F Patrick Ross, Baohong Zhao
Inflammatory bone resorption mediated by osteoclasts is a major cause of morbidity and disability in many inflammatory disorders, including rheumatoid arthritis (RA). The mechanisms that regulate osteoclastogenesis and bone resorption in inflammatory settings are complex and have not been well elucidated. In this study, we identify the immunoregulator differentially expressed in FDCP 6 homolog (Def6) as a novel inhibitor of osteoclastogenesis in physiological and inflammatory conditions. Def6 deficiency in Def6(-/-) mice enhanced the sensitivity of osteoclast precursors to the physiological osteoclastogenic inducer receptor activator for NF-κB ligand, and Def6(-/-) osteoclasts formed actin rings...
March 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28302488/protective-effects-of-zn-2-against-cobalt-nanoparticles-and-cobalt-chloride-induced-cytotoxicity-of-raw-264-7cells-via-ros-pathway
#11
Hai Zhu, Yake Liu, Hongxiang Hong, Wei Wang, Fan Liu
Recent concerns have emerged surrounding the toxicity that cobalt may represent when used in MOM implants. Owing to corrosion and wear of MOM implants, the subsequent released cobalt nanoparticles (CoNPs) or Co ions (Co(2+)) can cause adverse reactions, such as the generation of pseudotumors, extensive necrosis, early osteolysis, and implants failure. The present study confirmed that CoNPs and Co(2+) can induce dose- and time-dependent cytotoxicity with increasing reactive oxygen species (ROS) levels. Additionally, using metallothionein (MT), a heavy metal-binding protein, the present study assessed the protective effects of Zn(2+) against CoNPs and Co(2+)-induced cytotoxicity of RAW 264...
March 14, 2017: Biochemical and Biophysical Research Communications
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
#12
Vahit Emre Ozden, Goksel Dikmen, Burak Beksac, Ismail 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
#13
Ryohei Takada, Tetsuya Jinno, Daisuke Koga, Kazumasa Miyatake, Takeshi Muneta, Atsushi 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/28299327/minimum-lateral-bone-coverage-required-for-securing-fixation-of-cementless-acetabular-components-in-hip-dysplasia
#14
Masanori Fujii, Yasuharu Nakashima, Tetsuro Nakamura, Yoshihiro Ito, Toshihiko Hara
Objectives. To determine the minimum lateral bone coverage required for securing stable fixation of the porous-coated acetabular components (cups) in hip dysplasia. Methods. In total, 215 primary total hip arthroplasties in 199 patients were reviewed. The average follow-up period was 49 months (range: 24-77 months). The lateral bone coverage of the cups was assessed by determining the cup center-edge (cup-CE) angle and the bone coverage index (BCI) from anteroposterior pelvic radiographs. Further, cup fixation was determined using the modified DeLee and Charnley classification system...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28292431/anti-depressant-therapy-brightens-the-outlook-for-prostate-cancer-bone-metastases
#15
Michael D Nyquist, Peter S Nelson
In this issue of Cancer Cell, Wu et al. identify MAOA as a key mediator of osteolytic bone responses that involve complex paracrine interactions between tumor cells, osteoblasts, and osteoclasts. Pharmacological inhibition of MAOA enzymatic activity effectively interrupted osteolysis and metastatic progression in preclinical models, suggesting a new treatment opportunity.
March 13, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28291177/long-term-outcomes-of-reverse-total-shoulder-arthroplasty-a-follow-up-of-a-previous-study
#16
Guillaume Bacle, Laurent Nové-Josserand, Pascal Garaud, Gilles Walch
BACKGROUND: Despite the increasing numbers of reverse total shoulder arthroplasty (RTSA) procedures, the long-term results have been rarely reported. We previously reported early outcomes of a cohort of patients treated with a Grammont-style RTSA. The purpose of this study was to evaluate the outcomes after a minimum of 10 years, and to document prosthetic survival and complications. METHODS: Clinical outcome assessment was based on the absolute and relative Constant scores and the active range of motion...
March 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28291145/isolated-head-and-liner-exchange-in-revision-hip-arthroplasty
#17
David William Walmsley, James P Waddell, Emil H Schemitsch
As the number of primary total hip arthroplasties increases, so does the burden of revision procedures. The decision to revise well-fixed components in the setting of polyethylene wear and osteolysis is controversial. Modular head and liner exchange offers the advantages of reduced invasiveness, faster recovery, and bone preservation. These advantages come at the expense of higher rates of revision surgery for instability. Using the native locking mechanism for securing the new liner is preferred; however, cementing a liner into a well-fixed acetabular component is a practical alternative...
April 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28281003/bone-morphogenetic-protein-in-adult-spinal-deformity-surgery-a-meta-analysis
#18
Gregory W Poorman, Cyrus M Jalai, Anthony Boniello, Nancy Worley, Shearwood McClelland, Peter G Passias
INTRODUCTION: Since its introduction BMP has been utilized in populations with higher rates of malunion, such as adult spinal deformity (ASD) patients. Contradictory conclusions exist in spinal literature regarding the safety and efficacy of the use of BMP in this setting. Previous studies, however, did not distinguish deformity cases from spondylolisthesis or stenosis. The purpose of this study is to evaluate the safety and efficacy of BMP use in spinal fusion surgery for ASD. METHODS: 166 papers were screened after database search...
March 9, 2017: European Spine Journal
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/28274851/emerging-therapeutic-targets-in-cancer-induced-bone-disease-a-focus-on-the-peripheral-type-2-cannabinoid-receptor
#20
REVIEW
Silvia Marino, Aymen I Idris
Skeletal complications are a common cause of morbidity in patients with primary bone cancer and bone metastases. The type 2 cannabinoid (Cnr2) receptor is implicated in cancer, bone metabolism and pain perception. Emerging data have uncovered the role of Cnr2 in the regulation of tumour-bone cell interactions and suggest that agents that target Cnr2 in the skeleton have potential efficacy in the reduction of skeletal complications associated with cancer. This review aims to provide an overview of findings relating to the role of Cnr2 receptor in the regulation of skeletal tumour growth, osteolysis and bone pain, and highlights the many unanswered questions and unmet needs...
March 6, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
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