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https://www.readbyqxmd.com/read/28449254/bioresorbable-fe-mn-and-fe-mn-ha-materials-for-orthopedic-implantation-enhancing-degradation-through-porosity-control
#1
Michael Heiden, Eric Nauman, Lia Stanciu
Resorbable, porous iron-manganese-hydroxyapatite biocomposites with suitable degradation rates for orthopedic applications are prepared using salt-leaching for the first time. These transient biomaterials have the potential to replace inert, permanent implants that can suffer from long-term complications, or have to be surgically removed, leaving an unfavorable void. Fe30Mn-10HA materials are newly developed to address inadequate resorption rates of degradable materials proposed for orthopedic environments in the past...
April 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28448762/bone-turnover-in-osteoporotic-women-during-long-term-oral-bisphosphonates-treatment-implications-for-treatment-failure-and-drug-holiday-in-the-real-world
#2
Yair Liel, Ygal Plakht, Muhammad Abu-Tailakh
OBJECTIVE: Little data exists to support concerns over bone turnover suppression during prolonged oral bisphosphonates treatment and on consequences of the recommended "drug holiday". This study was set to assess bone resorption rates in postmenopausal osteoporotic women on prolonged oral bisphosphonates treatment, and in response to switching to "drug holiday", intravenous bisphosphonate or continuation of oral bisphosphonates. METHODS: Frequency distribution of the bone resorption marker urinary deoxypyridinoline cross-links (uDPD), was obtained retrospectively from 211 osteoporotic women attended at an academic hospital endocrine clinic, treated for >2 years with oral bisphosphonates...
April 27, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28448457/effects-of-vitamin-d-supplementation-on-bone-turnover-markers-a-randomized-controlled-trial
#3
Verena Schwetz, Christian Trummer, Marlene Pandis, Martin R Grübler, Nicolas Verheyen, Martin Gaksch, Armin Zittermann, Winfried März, Felix Aberer, Angelika Lang, Gerlies Treiber, Claudia Friedl, Barbara Obermayer-Pietsch, Thomas R Pieber, Andreas Tomaschitz, Stefan Pilz
Bone turnover markers (BTMs) are used to evaluate bone health together with bone mineral density and fracture assessment. Vitamin D supplementation is widely used to prevent and treat musculoskeletal diseases but existing data on vitamin D effects on markers of bone resorption and formation are inconsistent. We therefore examined the effects of vitamin D supplementation on bone-specific alkaline phosphatase (bALP), osteocalcin (OC), C-terminal telopeptide (CTX), and procollagen type 1 N-terminal propeptide (P1NP)...
April 27, 2017: Nutrients
https://www.readbyqxmd.com/read/28447177/yeast-rna-extract-suppresses-human-osteoclast-resorption-in-vitro
#4
Melissa D Cantley, K D Rainsford, David R Haynes
AIMS: The aim of this short study was to test the combinations of RNA extracts (both the connective tissue extracts-cartilage and synovia along with yeast extract) found in natural ribonucleotide extract Osteochondrin S (OST) on human osteoclast formation and activity in vitro. METHODS: In vitro human osteoclasts were treated with the RNA extracts (cartilage, synovia and yeast) at concentrations equivalent to those in OST starting from day 7 of the culture. A tartrate resistant acid phosphatase stain (TRAP) was used to indicate osteoclast formation and activity assessed by determining area of dentine resorption...
April 26, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28445371/preventing-early-stage-graft-bone-resorption-by-simultaneous-innervation-innervated-iliac-bone-flap-for-mandibular-reconstruction
#5
Lei Wang, Jian-Hua Wei, Xi Yang, Zi-Hui Yang, Mo-Yi Sun, Xiao-Bing Cheng, Li-Qun Xu, De-Lin Lei, Chen-Ping Zhang
BACKGROUND: Postoperative resorption of vascularized bone grafts jeopardizes the success of dental implant(s) and functional rehabilitation of the jaw. Recent evidence supports the crucial role of innervation in bone regeneration and turnover. METHODS: This study reports a new technique for simultaneous innervation of vascularized iliac flaps in mandibular reconstruction, through neurorrhaphy between ilioinguinal nerves, which innervate iliac bone, and inferior alveolar nerves or great auricular nerves...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28444165/proinflammatory-mediators-related-to-orthodontically-induced-periapical-root-resorption-in-rat-mandibular-molars
#6
Yoshiro Matsumoto, Siripen Sringkarnboriboon, Takashi Ono
Objectives: The early phase of orthodontic tooth movement involves acute inflammatory response that may induce bone resorption. The aim of this study was to localize and quantify cells in the periodontium expressing proinflammatory mediators during orthodontically induced periapical root resorption of the rat mandibular molars. Materials and methods: The levels of proinflammatory cytokines interleukin-1 (IL-1) α and β, tumor necrosis factor-α (TNF-α), inflammatory enzymes cyclooxygenase (COX) 1 and 2, and their product prostaglandin E2 (PGE2) in the root resorption site were compared to those in the corresponding area of the untreated periodontal ligament (PDL) of physiologically drifting teeth...
April 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28442663/histochemical-assessment-for-osteoblastic-activity-coupled-with-dysfunctional-osteoclasts-in-c-src-deficient-mice
#7
Hisashi Toray, Tomoka Hasegawa, Naoko Sakagami, Erika Tsuchiya, Ai Kudo, Shen Zhao, Yasuhito Moritani, Miki Abe, Taiji Yoshida, Tomomaya Yamamoto, Tsuneyuki Yamamoto, Kimimitsu Oda, Nobuyuki Udagawa, Paulo Henrique Luiz de Freitas, Minqi Li
Since osteoblastic activities are believed to be coupled with osteoclasts, we have attempted to histologically verify which of the distinct cellular circumstances, the presence of osteoclasts themselves or bone resorption by osteoclasts, is essential for coupled osteoblastic activity, by examining c-fos(-/-) or c-src(-/-) mice. Osteopetrotic c-fos deficient (c-fos(-/-)) mice have no osteoclasts, while c-src deficient (c-src(-/-)) mice, another osteopetrotic model, develop dysfunctional osteoclasts due to a lack of ruffled borders...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28441214/the-osteo-odonto-keratoprosthesis
#8
Mehran Zarei-Ghanavati, Venkata Avadhanam, Alfonso Vasquez Perez, Christopher Liu
PURPOSE OF REVIEW: To describe the practice of and recent developments in the osteo-odonto-keratoprosthesis. RECENT FINDINGS: Formal psychological assessment and support have been described. A sub-aqua system for fashioning the osteo-odonto-keratoprosthesis lamina; adoption of thicker laminae; use of bisphosphonate drugs; advances in laminar imaging; and use of bone augmentation and bone morphogenetic protein have been described for prevention, detection, and management of laminar resorption...
April 24, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28439941/serological-biomarkers-detect-active-joint-destruction-and-inflammation-in-patients-with-haemophilic-arthropathy
#9
B Hua, E H N Olsen, S Sun, C N Gudme, L Wang, B Vandahl, K Roepstorff, M Kjelgaard-Hansen, B B Sørensen, Y Zhao, M A Karsdal, T Manon-Jensen
INTRODUCTION: Progressive arthropathy caused by recurrent joint bleeds is a severe complication in haemophilia. AIM: We investigated whether biomarkers of cartilage and bone degradation, and inflammation were altered in haemophilia patients and whether these biomarkers could identify haemophilia patients with arthropathy. METHODS: Serum from 35 haemophilia patients with varying degrees of arthropathy and 43 age- and gender-matched control subjects were analysed...
April 24, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28439906/regenerative-endodontic-treatment-of-perforated-internal-root-resorption-a-case-report
#10
M E Kaval, P Güneri, M K Çalışkan
AIM: To present the regenerative endodontic treatment procedure of a perforated internal root resorption case and its' clinical and radiographic findings after two years. SUMMARY: A 14-year-old female patient was referred complaining of moderate pain associated with her maxillary left lateral incisor. After radiographic examination, a perforated internal resorption lesion in the middle third of tooth 22 was detected. Under local anaesthesia and rubber dam isolation, an access cavity was prepared and the root canal was shaped using K-files under copious irrigation with 1% NaOCl, 17% EDTA and distilled water...
April 25, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28439619/association-between-bone-mineral-density-muscle-strength-and-vitamin-d-status-in-patients-with-myasthenia-gravis-a-cross-sectional-study
#11
Y Guan, F Lv, Y Meng, D Ma, X Xu, Y Song, O Wang, Y Jiang, W Xia, X Xing, J Zhang, M Li
Myasthenia gravis (MG) patients had low proximal hip BMD, which could be explained by reduced muscle strength, elevated bone resorption markers, vitamin D deficiency, and increased PTH levels in those with MG compared to controls. INTRODUCTION: Muscle strength is closely correlated with bone mineral density (BMD) and vitamin D status. Here, we evaluated muscle strength, BMD, and vitamin D status in a large sample of Chinese patients with MG. METHODS: In this cross-sectional survey, 86 patients with MG without glucocorticoid treatment and 86 healthy controls were included...
April 24, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28439468/a-link-between-central-kynurenine-metabolism-and-bone-strength-in-rats-with-chronic-kidney-disease
#12
Bartlomiej Kalaska, Krystyna Pawlak, Ewa Oksztulska-Kolanek, Tomasz Domaniewski, Beata Znorko, Malgorzata Karbowska, Aleksandra Citkowska, Joanna Rogalska, Alicja Roszczenko, Malgorzata M Brzoska, Dariusz Pawlak
BACKGROUND: Disturbances in mineral and bone metabolism represent one of the most complex complications of chronic kidney disease (CKD). Serotonin, a monoamine synthesized from tryptophan, may play a potential role in bone metabolism. Brain-derived serotonin exerts a positive effect on the bone structure by limiting bone resorption and enhancing bone formation. Tryptophan is the precursor not only to the serotonin but also and primarily to kynurenine metabolites. The ultimate aim of the present study was to determine the association between central kynurenine metabolism and biomechanical as well as geometrical properties of bone in the experimental model of the early stage of CKD...
2017: PeerJ
https://www.readbyqxmd.com/read/28439157/re-assessment-of-coronoid-as-a-graft-for-condylar-reconstruction-in-tmj-ankylosis-patients-a-prospective-study-and-literature-review
#13
Gagan Mehta, Shadab Mohammad, Hari Ram, Vibha Singh, Rakesh Kumar Chak, Shiwani Garg, Kuldeep Vishwakarma
INTRODUCTION: Treatment for TMJ ankylosis aims at restoring joint function, improving the patient's aesthetic appearance and quality of life and preventing re-ankylosis. To rebuild a structurally and functionally satisfactory neocondyle is a challenging problem. Aim of this study is to re-assess the coronoid as a graft for condyle reconstruction. MATERIALS AND METHODS: Twenty patients of TMJ ankylosis without involvement of the coronoid process in ankylotic mass, coming in age group elder than 14 years were selected for the study over a period 3 years from 2011 to 2014...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28439061/-calcium-and-bone-metabolism-across-women-s-life-stages-bone-quality-and-treatment-of-osteoporosis-by-serm
#14
Mitsuru Saito, Keishi Marumo
Estrogen deficiency induces bone resorption and bone collagen crosslink abnormalities such as reductions in enzymatic cross-links and accumulation of Advanced glycation end products(AGEs). In this review, we described that the mechanism of poor bone quality in estrogen deficiency and how selective estrogen receptor modulators such as raloxifene and bazedoxifene improve bone structural and material properties.
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28439052/-calcium-and-bone-metabolism-across-women-s-life-stages-pathophysiology-adiagnosis-and-treatment-of-post-pregnancy-osteoporosis
#15
Takumi Kurabayashi
Post-pregnancy osteoporosis is a rare condition with little known pathophysiology. Most cases are diagnosed in the late stage of pregnancy or in the post-partum while breastfeeding, particularly in first pregnancy. Vertebral fractures are most commonly observed and characterized by prolonged severe pain and functional limitations. Measurements of bone mineral density(BMD)of the lumbar spine and proximal femur with dual energy X-ray absorptiometry(DXA)are the clinical methods most commonly used for no fracture women...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28439051/-calcium-and-bone-metabolism-across-women-s-life-stages-molecular-mechanisms-underlying-bone-metabolism-by-estrogen
#16
Yuuki Imai
Osteoporosis, which patients are estimated as more than 13 million in Japan, is mainly caused by postmenopausal osteoporosis. Estrogen deficiency induced by menopause can disturb endocrine feedback and homeostasis, followed by bone loss by increased bone resorption with high bone turnover. Recent studies using systemic or conditional Estrogen Receptor α(ERα)gene knockout mice have unveiled molecular mechanisms underlying bone metabolism. In this review, it will be discussed that direct and indirect effects of estrogen and its metabolites for bone metabolism...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28439050/-calcium-and-bone-metabolism-across-women-s-life-stages-changes-of-biochemical-markers-of-bone-turnover-in-life-cycle-of-women
#17
Osamu Chaki
Development of bone metabolism markers began about 35 years ago. Current by the osteoporosis and bone metabolism diseases diagnosis and treatment efficacy. In childhood and adolescence, bone formation and resorption were increased, but formation rate was exceeded resorption rate. To keep strength of bone, bone formation and resorption are balanced(remodeling)in the period of maturity, Bone mineral density greatly decreases and biochemical markers of bone turnover markedly increase in postmenopausal women, indicating accelerated bone remodeling because of estrogen withdrawal...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28438834/rankl-cytokine-enhances-tnf-induced-osteoclastogenesis-independently-of-tnf-receptor-associated-factor-traf-6-by-degrading-traf3-in-osteoclast-precursors
#18
Zhenqiang Yao, Wei Lei, Rong Duan, Yanyun Li, Lu Luo, Brendan F Boyce
Cytokines, including receptor activator of nuclear factor kappa B ligand (RANKL) and TNF, induce increased osteoclast (OC) formation and bone loss in postmenopausal osteoporosis and inflammatory arthritides. RANKL and TNF can independently induce OC formation in vitro from WT OC precursors via TNF receptor-associated factor (TRAF) adaptor proteins, which bind to their receptors. Of these, only TRAF6 is required for RANKL-induced osteoclastogenesis in vitro. However, the molecular mechanisms involved remain incompletely understood...
April 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28438779/human-alternative-macrophages-populate-calcified-areas-of-atherosclerotic-lesions-and-display-impaired-rankl-induced-osteoclastic-bone-resorption-activity
#19
Giulia Chinetti-Gbaguidi, Mehdi Daoudi, Mickael Rosa, Manjula Vinod, Loïc Louvet, Corinne Copin, Melanie Fanchon, Jonathan Vanhoutte, Bruno Derudas, Loic Belloy, Stephan Haulon, Christophe Zawadzki, Sophie Susen, Ziad A Massy, Jérôme Eeckhoute, Bart Staels
Rationale: Vascular calcification is a process similar to bone formation leading to an inappropriate deposition of calcium phosphate minerals in advanced atherosclerotic plaques. Monocyte-derived macrophages, located in atherosclerotic lesions and presenting heterogeneous phenotypes, from classical pro-inflammatory M1 to alternative anti-inflammatory M2 macrophages, could potentially display osteoclast-like functions. Objective: To characterize the phenotype of macrophages located in areas surrounding the calcium deposits in human atherosclerotic plaques...
April 24, 2017: Circulation Research
https://www.readbyqxmd.com/read/28436937/efficacy-of-anti-sclerostin-monoclonal-antibody-bps804-in-adult-patients-with-hypophosphatasia
#20
Lothar Seefried, Jasmin Baumann, Sarah Hemsley, Christine Hofmann, Erdmute Kunstmann, Beate Kiese, Yue Huang, Simon Chivers, Marie-Anne Valentin, Babul Borah, Ronenn Roubenoff, Uwe Junker, Franz Jakob
BACKGROUND: Hypophosphatasia (HPP) is a rare genetic disorder resulting in variable alterations of bone formation and mineralization that are caused by mutations in the ALPL gene, encoding the tissue-nonspecific alkaline phosphatase (ALP) enzyme. METHODS: In this phase IIA open-label, single-center, intra-patient, dose-escalating study, adult patients with HPP received 3 ascending intravenous doses of 5, 10, and 20 mg/kg BPS804, a fully human anti-sclerostin monoclonal antibody, on days 1, 15, and 29, respectively...
April 24, 2017: Journal of Clinical Investigation
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