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https://www.readbyqxmd.com/read/28547573/results-of-lumbar-spondylodeses-using-different-bone-grafting-materials-after-transforaminal-lumbar-interbody-fusion-tlif
#1
Nicolas Heinz vonderHoeh, Anna Voelker, Christoph-Eckhard Heyde
PURPOSE: Can a mixture of hydroxyapatite (HA) and autologous bone from decompression sites produce similar results when used for transforaminal lumbar interbody fusion (TLIF)? In the current literature, autologous iliac crest bone grafts (ICBGs) have been reported the gold standard for this procedure. Indeed, to date, no clinical data have confirmed that a mixture of equal volumes of HA and local autologous bone produce similar results in term of fusion as the same volume of autologous ICBG alone...
May 25, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28532086/freeze-casting-for-plga-carbonated-apatite-composite-scaffolds-structure-and-properties
#2
M Schardosim, J Soulié, D Poquillon, S Cazalbou, B Duployer, C Tenailleau, C Rey, R Hübler, C Combes
This paper focuses on the fabrication of three-dimensional porous PLGA-biomimetic carbonated apatite composite scaffolds by freeze-casting and using dimethyl carbonate as a solvent. Several charge/polymer ratios were tested in order to finely understand the influence of the filler rate on the scaffold porosity and mechanical and degradation properties using complementary characterization techniques (SEM, mercury porosimetry and X-ray microtomography). It was demonstrated that the apatite ratio within the composite scaffold has a strong influence in terms of architecture, material cohesion, mechanical properties and in vitro degradation properties...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532070/ribose-mediated-crosslinking-of-collagen-hydroxyapatite-hybrid-scaffolds-for-bone-tissue-regeneration-using-biomimetic-strategies
#3
Gopal Shankar Krishnakumar, Natalia Gostynska, Elisabetta Campodoni, Massimiliano Dapporto, Monica Montesi, Silvia Panseri, Anna Tampieri, Elizaveta Kon, Maurilio Marcacci, Simone Sprio, Monica Sandri
This study explores for the first time the application of ribose as a highly biocompatible agent for the crosslinking of hybrid mineralized constructs, obtained by bio-inspired mineralization of self-assembling Type I collagen matrix with magnesium-doped-hydroxyapatite nanophase, towards a biomimetic mineralized 3D scaffolds (MgHA/Coll) with excellent compositional and structural mimicry of bone tissue. To this aim, two different crosslinking mechanisms in terms of pre-ribose glycation (before freeze drying) and post-ribose glycation (after freeze drying) were investigated...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529724/recent-advances-in-the-management-of-osteoporosis
#4
REVIEW
Seiji Fukumoto, Toshio Matsumoto
There has been substantial progress in the management of patients with osteoporosis and the prevention of osteoporotic fractures. Currently available strong anti-resorptive agents are bisphosphonates and an anti-receptor activator of nuclear factor-kappa B ligand (RANKL) antibody, denosumab. Although bisphosphonates and denosumab both inhibit bone resorption and prevent vertebral and non-vertebral fractures, their mechanisms of action are different. Whereas bisphosphonates' effects on bone mineral density and fracture peak around 3 to 5 years and become plateaued, those of denosumab are maintained for up to 10 years...
2017: F1000Research
https://www.readbyqxmd.com/read/28524118/novel-radiolabeled-bisphosphonates-for-pet-diagnosis-and-endoradiotherapy-of-bone-metastases
#5
REVIEW
Nina Pfannkuchen, Marian Meckel, Ralf Bergmann, Michael Bachmann, Chandrasekhar Bal, Mike Sathekge, Wolfgang Mohnike, Richard P Baum, Frank Rösch
Bone metastases, often a consequence of breast, prostate, and lung carcinomas, are characterized by an increased bone turnover, which can be visualized by positron emission tomography (PET), as well as single-photon emission computed tomography (SPECT). Bisphosphonate complexes of (99m)Tc are predominantly used as SPECT tracers. In contrast to SPECT, PET offers a higher spatial resolution and, owing to the (68)Ge/(68)Ga generator, an analog to the established (99m)Tc generator exists. Complexation of Ga(III) requires the use of chelators...
May 18, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28521184/one-stage-posterior-grade-4-osteotomy-and-bone-graft-fusion-at-pseudarthrosis-for-the-treatment-of-kyphotic-deformity-with-andersson-lesions-in-ankylosing-spondylitis
#6
Tingxian Ling, Bangjian Zhou, Ce Zhu, Xi Yang, Yueming Song, Zhe Qiang, Limin Liu
OBJECTIVES: The optimal surgical procedure for treating kyphotic deformity with Andersson lesions (ALs) in ankylosing spondylitis (AS) patients is controversial. The one-stage posterior osteotomy and bone graft fusion approach is rarely reported. The aim of the present study was to report a new surgical procedure involving one-stage posterior grade 4 osteotomy and bone graft fusion for the treatment of kyphotic deformity with ALs in AS. PATIENTS AND METHODS: Eleven patients with ALs in AS were enrolled...
May 11, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28520823/comparison-of-tunnel-and-crestal-incision-techniques-in-reconstruction-of-localized-alveolar-defects
#7
Nur Altiparmak, Sina Uckan, Burak Bayram, Sıdıka Soydan
PURPOSE: The aim of this study was to compare the complication rates of recipient sites prepared using two incision techniques: crestal and tunnel. MATERIALS AND METHODS: In this prospective study, patients underwent augmentation procedures (68 patients; 75 sites) by the same surgeon that were performed consecutively using the crestal incision technique (27 horizontal, 10 vertical; crestal group) or the tunnel incision technique (27 horizontal, 11 vertical; tunnel group)...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518184/a-method-for-minimizing-rotational-errors-of-implant-prostheses
#8
Hyeonjong Lee, Kung-Rock Kwon, Janghyun Paek, Ahran Pae, Kwantae Noh
PURPOSE: Rotational errors of implants can occur during two stages: when connecting impression copings with implants, and when connecting impression copings with analogs. The aim of this study was to determine ways to minimize these rotational errors. MATERIALS AND METHODS: Three types of implants were prepared: a tissue-level implant with an internal octagon 8-degree Morse taper connection, a bone-level implant with an internal hex 11-degree Morse taper connection, and a bone-level implant with an external hex connection...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28511967/a-sliding-hip-screw-augmented-with-2-screws-is-biomechanically-similar-to-an-inverted-triad-of-cannulated-screws-in-repair-of-a-pauwels-type-iii-fracture
#9
B Kemker, K Magone, J Owen, P Atkinson, S Martin, T Atkinson
OBJECTIVE: Pauwels III femoral neck fractures are highly unstable. These fractures are commonly treated with three cannulated screws or sliding hip screw (SHS) implants, however high rates of non-union persist. A hybrid SHS construct has recently been proposed. The objective of the study was to compare this construct to the familiar inverted triad of cannulated screws and to a single SHS. METHODS: Fourth generation biomechanical femur analogs were used to create a highly repeatable injury model...
May 8, 2017: Injury
https://www.readbyqxmd.com/read/28506261/a-possible-role-of-low-regulatory-t-cells-in-anti-acetylcholine-receptor-antibody-positive-myasthenia-gravis-after-bone-marrow-transplantation
#10
Masahiko Fukatsu, Takenobu Murakami, Hiroshi Ohkawara, Shunichi Saito, Kazuhiko Ikeda, Suguru Kadowaki, Itaru Sasaki, Mari Segawa, Tomoko Soeda, Akihiko Hoshi, Hiroshi Takahashi, Akiko Shichishima-Nakamura, Kazuei Ogawa, Yoshihiro Sugiura, Hitoshi Ohto, Yasuchika Takeishi, Takayuki Ikezoe, Yoshikazu Ugawa
BACKGROUND: Chronic graft-versus-host disease (GVHD) appears several months following allogenic hematopoietic stem cell transplantation (HSCT) and is clinically analogous to autoimmune disorder. Polymyositis is a common neuromuscular disorder in chronic GVHD, but myasthenia gravis (MG) is extremely rare. Hence, its pathophysiology and treatment have not been elucidated. CASE PRESENTATION: A 63-year-old man with a history of chronic GVHD presented with ptosis, dropped head, and dyspnea on exertion, which had worsened over the previous several months...
May 15, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28506249/an-unusual-case-of-proximal-humeral-simple-bone-cyst-in-an-adult-from-secondary-cystic-change
#11
Mamer S Rosario, Norio Yamamoto, Katsuhiro Hayashi, Akihiko Takeuchi, Hiroaki Kimura, Shinji Miwa, Takashi Higuchi, Hiroyuki Inatani, Kensaku Abe, Yuta Taniguchi, Hisaki Aiba, Hiroyuki Tsuchiya
BACKGROUND: Simple bone cysts (SBC) have been documented to occur in adults with closed physeal plates, most commonly affecting the calcaneus in this patient subset. Although most authors theorize an association to trauma, etiology of simple bone cysts remains an enigma up to now. CASE PRESENTATION: A 26-year-old kickboxing coach sought consult for a painful right shoulder which on radiographs and magnetic resonance (MR) imaging showed a proximal humeral lesion with signs of ossification...
May 15, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28500304/microgravity-induces-inhibition-of-osteoblastic-differentiation-and-mineralization-through-abrogating-primary-cilia
#12
Wengui Shi, Yanfang Xie, Jinpeng He, Jian Zhou, Yuhai Gao, Wenjun Wei, Nan Ding, Huiping Ma, Cory J Xian, Keming Chen, Jufang Wang
It is well documented that microgravity in space environment leads to bone loss in astronauts. These physiological changes have also been validated by human and animal studies and modeled in cell-based analogs. However, the underlying mechanisms are elusive. In the current study, we identified a novel phenomenon that primary cilia (key sensors and functioning organelles) of rat calvarial osteoblasts (ROBs) gradually shrank and disappeared almost completely after exposure to simulated microgravity generated by a random positioning machine (RPM)...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28498022/thyroid-hormone-analogs-for-the-treatment-of-dyslipidemia-past-present-and-future
#13
Alessandro P Delitala, Giuseppe Delitala, Paolo Sioni, Giuseppe Fanciulli
OBJECTIVE: Treatment of dyslipidemia is a major burden for public health. Thyroid hormone regulates lipid metabolism by binding the thyroid hormone receptor (TR), but the use of thyroid hormone to treat dyslipidemia is not indicated due to its deleterious effects on heart, bone, and muscle. Thyroid hormone analogs have been conceived to selectively activate TR in the liver, thus reducing potential side effects. METHODS: We searched the PubMed database to review TR and the action of thyromimetics in vitro and in animal models...
May 12, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28497215/evidence-based-prevention-and-treatment-of-osteoporosis-after-spinal-cord-injury-a-systematic-review
#14
REVIEW
Saeed Soleyman-Jahi, Ali Yousefian, Radin Maheronnaghsh, Farhad Shokraneh, Shayan Abdollah Zadegan, Akbar Soltani, Seyed Mostafa Hosseini, Alexander R Vaccaro, Vafa Rahimi-Movaghar
PURPOSE: Spinal cord injury (SCI) results in accelerated bone mineral density (BMD) loss and disorganization of trabecular bone architecture. The mechanisms underlying post-SCI osteoporosis are complex and different from other types of osteoporosis. Findings of studies investigating efficacy of pharmacological or rehabilitative interventions in SCI-related osteoporosis are controversial. The aim of this study was to review the literature pertaining to prevention and evidence-based treatments of SCI-related osteoporosis...
May 11, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28495495/translating-in-vitro-ligand-bias-into-in-vivo-efficacy
#15
REVIEW
Louis M Luttrell, Stuart Maudsley, Diane Gesty-Palmer
It is increasingly apparent that ligand structure influences both the efficiency with which G protein-coupled receptors (GPCRs) engage their downstream effectors and the manner in which they are activated. Thus, 'biased' agonists, synthetic ligands whose intrinsic efficacy differs from the native ligand, afford a strategy for manipulating GPCR signaling in ways that promote beneficial signals while blocking potentially deleterious ones. Still, there are significant challenges in relating in vitro ligand efficacy, which is typically measured in heterologous expression systems, to the biological response in vivo, where the ligand is acting on natively expressed receptors and in the presence of the endogenous ligand...
May 7, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28494041/innovative-single-tooth-replacement-with-an-individual-root-analog-hybrid-implant-in-the-esthetic-zone-case-report
#16
Reza Saeidi Pour, Peter Randelzhofer, Daniel Edelhoff, Otto Prandtner, Caroline Freitas Rafael, Anja Liebermann
The goal of this study was to explore an innovative approach to single-tooth replacement using an individually custom-fabricated, root-analog, hybrid dental implant, in the esthetic zone, to avoid the microgap and micromovements between the implant and abutment. Moreover, the use of burs to prepare the implant recipient site is not necessary in this technique, reducing the bone removal, heating, and trauma. The process requires capturing accurate root geometry through combined computer-aided design/computer-assisted manufacturing (CAD/CAM) and a three-dimensional (3D) visualization (digital volume tomography [DVT]) of the tooth in situ, which might result in reduced remodeling after insertion...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28491037/sodium-4-carboxymethoxyimino-4-hpr-a-novel-water-soluble-derivative-of-4-oxo-4-hpr-endowed-with-in-vivo-anticancer-activity-on-solid-tumors
#17
Paola Tiberio, Elena Cavadini, Loredana Cleris, Sabrina Dallavalle, Loana Musso, Maria G Daidone, Valentina Appierto
4-oxo-N-(4-hydroxyphenyl)retinamide (4-oxo-4-HPR), an active polar metabolite of the synthetic retinoid N-(4-hydroxyphenyl)retinamide (4-HPR), was shown to exert promising antitumor activity through at least two independent mechanisms of action. Specifically, differently from 4-HPR and other retinoids, 4-oxo-4-HPR targets microtubules and inhibits tubulin polymerization causing mitotic arrest and on the other hand, analogously to the parent drug, it induces apoptosis through the activation of a signaling cascade involving the generation of reactive oxygen species (ROS)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28490676/excretion-of-zinc-and-copper-increases-in-men-during-3-weeks-of-bed-rest-with-or-without-artificial-gravity
#18
Hayley N Heacox, Patricia L Gillman, Sara R Zwart, Scott M Smith
Background: Zinc and copper have many physiologic functions and little or no functional storage capability, so persistent losses of either element present health concerns, especially during extended-duration space missions.Objectives: We evaluated the effects of short-term bed rest (BR), a spaceflight analog, on copper and zinc metabolism to better understand the role of these nutrients in human adaptation to (simulated) spaceflight. We also investigated the effect of artificial gravity on copper and zinc homeostasis...
May 10, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28486353/vertical-and-horizontal-crestal-bone-levels-in-root-analog-stepped-implants-a-10-year-prospective-study
#19
Germán Gómez-Román, Stefan Rombach
PURPOSE: The aim of this study was to evaluate bone levels with root-analog stepped implants by radiographic analysis over a 10-year period. MATERIALS AND METHODS: One hundred fifty-three implants placed in 93 patients were examined after 10-year follow-up. The implant diameters were 3.8 to 6.5 millimeters (mm), whereas the lengths were 10 to 15 millimeters (mm). One hundred seven implants were restored with single crowns or fixed partial dentures, 46 with bar or ball-retained overdentures...
May 8, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28484877/combined-application-of-diclofenac-and-celecoxib-with-an-opioid-yields-superior-efficacy-in-metastatic-bone-cancer-pain-a-randomized-controlled-trial
#20
Zunyong Liu, Yan Xu, Zhong-Liang Liu, Yi-Zhou Tian, Xiao-Heng Shen
BACKGROUND: Metastatic bone cancer pain is one of the most common clinical cancer pains and is caused by many factors. This study was conducted to explore the clinical efficacy of using two non-steroidal anti-inflammatory drugs (NSAIDs) along with an opioid in treating metastatic bone cancer pain. MATERIAL AND METHOD: A total of 342 patients with a pain score of 7-10 on the visual analog scale (VAS) were recruited for 4 weeks of treatment and randomly assigned to three different groups-one group received two NSAIDs (diclofenac and celecoxib), one group received diclofenac, and one group received celecoxib...
May 8, 2017: International Journal of Clinical Oncology
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