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Demineralized bone matrix

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https://www.readbyqxmd.com/read/27909656/outcomes-of-demineralized-bone-matrix-enriched-with-concentrated-bone-marrow-aspirate-in-lumbar-fusion
#1
Remi M Ajiboye, Mark A Eckardt, Jason T Hamamoto, Benjamin Plotkin, Michael D Daubs, Jeffrey C Wang
BACKGROUND: Multiple studies have demonstrated that a significant amount of variability exists in various demineralized bone matrix (DBM) formulations, which casts doubts on its reliability in consistently promoting fusion. Bone marrow aspirate (BMA) is a cellular based graft that contains mesenchymal stem cells (MSCs) and growth factors can confer osteogenic and osteoinductive potential to DBM. The goal of this study was to describe the outcome of DBM enriched with concentrated BMA in patients undergoing combined lumbar interbody and posterolateral fusion...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27909654/bone-substitutes-and-expanders-in-spine-surgery-a-review-of-their-fusion-efficacies
#2
Abhijeet Kadam, Paul W Millhouse, Christopher K Kepler, Kris E Radcliff, Michael G Fehlings, Michael E Janssen, Rick C Sasso, James J Benedict, Alexander R Vaccaro
STUDY DESIGN: A narrative review of literature. OBJECTIVE: This manuscript intends to provide a review of clinically relevant bone substitutes and bone expanders for spinal surgery in terms of efficacy and associated clinical outcomes, as reported in contemporary spine literature. SUMMARY OF BACKGROUND DATA: Ever since the introduction of allograft as a substitute for autologous bone in spinal surgery, a sea of literature has surfaced, evaluating both established and newly emerging fusion alternatives...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27905031/modern-approaches-to-studies-of-new-osteogenic-biomaterials-on-the-model-of-regeneration-of-critical-size-cranial-defects-in-rats
#3
M S Bartov, A V Gromov, M S Poponova, D M Savina, K E Nikitin, T M Grunina, V N Manskikh, O A Gra, V G Lunin, A S Karyagina, A L Gintsburg
Osteoinductive characteristics of new osteoplastic materials based on demineralized bone matrix of xenogenic origin with high and controlled degree of purification were studied on the model of regeneration of critical-size cranial defects in rats using modern approaches, including histological analysis, evaluation of morphological parameters of the bone tissue obtained by micro-computed tomography, and estimation of bone tissue growth rate using in vivo fluorochrome label. Demineralized bone matrix and, to a much greater extent, its activated form containing modified recombinant growth factor rhBMP-2 with high content of the dimeric form exhibited osteoinductive activity...
December 1, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27892493/autologous-temporomandibular-joint-reconstruction-independent-of-exogenous-additives-a-proof-of-concept-study-for-guided-self-generation
#4
Jiao Wei, Tanja Herrler, Dong Han, Kai Liu, Rulin Huang, Markus Guba, Chuanchang Dai, Qingfeng Li
Joint defects are complex and difficult to reconstruct. By exploiting the body's own regenerative capacity, we aimed to individually generate anatomically precise neo-tissue constructs for autologous joint reconstruction without using any exogenous additives. In a goat model, CT scans of the mandibular condyle including articular surface and a large portion of the ascending ramus were processed using computer-aided design and manufacturing. A corresponding hydroxylapatite negative mold was printed in 3D and temporarily embedded into the transition zone of costal periosteum and perichondrium...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27883077/tgf-beta-receptor-ii-interacting-protein-1-an-intracellular-protein-has-an-extracellular-role-as-a-modulator-of-matrix-mineralization
#5
Amsaveni Ramachandran, Sriram Ravindran, Chun-Chieh Huang, Anne George
Transforming growth factor beta receptor II interacting protein 1 (TRIP-1), a predominantly intracellular protein is localized in the ECM of bone. TRIP-1 lacks a signal peptide, therefore, in this study, we provide evidence that intracellular TRIP-1 can be packaged and exported to the ECM via exosomes. Overexpression of TRIP-1 in MC3T3-E1 cells resulted in increased matrix mineralization during differentiation and knockdown resulted in reduced effects. In vivo function of TRIP-1 was studied by an implantation assay performed using TRIP-1 overexpressing and knockdown cells cultured in a 3-dimmensional scaffold...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27877865/three-dimensional-printed-macroporous-polylactic-acid-hydroxyapatite-composite-scaffolds-for-promoting-bone-formation-in-a-critical-size-rat-calvarial-defect-model
#6
Haifeng Zhang, Xiyuan Mao, Zijing Du, Wenbo Jiang, Xiuguo Han, Danyang Zhao, Dong Han, Qingfeng Li
We have explored the applicability of printed scaffold by comparing osteogenic ability and biodegradation property of three resorbable biomaterials. A polylactic acid/hydroxyapatite (PLA/HA) composite with a pore size of 500 μm and 60% porosity was fabricated by three-dimensional printing. Three-dimensional printed PLA/HA, β-tricalcium phosphate (β-TCP) and partially demineralized bone matrix (DBM) seeded with bone marrow stromal cells (BMSCs) were evaluated by cell adhesion, proliferation, alkaline phosphatase activity and osteogenic gene expression of osteopontin (OPN) and collagen type I (COL-1)...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27872380/management-of-distal-tibial-metaphyseal-bone-defects-with-an-intramedullary-nitinol-scaffold-a-novel-technique
#7
Samuel E Ford, J Kent Ellington
: Difficult problems that are faced when reconstructing severe pilon fractures include filling metaphyseal defects and supporting an impacted, multifragmented articular surface. Supplements to plate fixation currently available in a surgeon's armamentarium include cancellous bone autograft, structural bone allograft, demineralized bone matrix, and calcium-based cements. Cancellous autograft possesses limited inherent mechanical stability and is associated with graft site morbidity. Structural allografts incorporate inconsistently and are plagued by late resorption...
November 20, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27863162/irradiation-sterilized-gelatin-water-glycerol-ternary-gel-as-an-injectable-carrier-for-bone-tissue-engineering
#8
Yantao Zhao, Liwei Han, Jun Yan, Zhonghai Li, Fuli Wang, Yang Xia, Shuxun Hou, Hongbin Zhong, Feimin Zhang, Ning Gu
Injectable gelatin gels offer an attractive option for filling bone defects. The challenge is to fabricate gelatin gels with optimal gelation properties, which can be irradiation sterilized. Here, a gelatin-water-glycerol (GWG) gel is reported for use as a broad-spectrum injectable carrier. This ternary gel is high in glycerol and low in water, and remains stable after gamma irradiation at doses (25 kGy). As an injectable gel, it remains a viscous solution at gelatin concentrations ≤2.0%, at room temperature...
November 8, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27832365/demineralized-bone-matrix-in-anterior-cervical-discectomy-and-fusion-a-systematic-review
#9
REVIEW
Shayan Abdollah Zadegan, Aidin Abedi, Seyed Behnam Jazayeri, Alexander R Vaccaro, Vafa Rahimi-Movaghar
PURPOSE: Anterior cervical discectomy and fusion (ACDF) is one of the most widely used procedures in cervical spine. Demineralized bone matrix (DBM) is one of the fusion options that has been used in treatment of the bone defects for years. The purpose of this review is to provide an evidence-based analysis on the current evidence for effectiveness of DBM in ACDF. METHODS: A systematic search of the literature was conducted using MEDLINE, Scopus, and CENTRAL. The risk of bias was evaluated with the criteria recommended by the Cochrane Back and Neck group and the Methodological Index for Non-Randomized Studies (MINORS)...
November 10, 2016: European Spine Journal
https://www.readbyqxmd.com/read/27818692/implant-composed-of-demineralized-bone-and-mesenchymal-stem-cells-genetically-modified-with-adbmp2-adbmp7-for-the-regeneration-of-bone-fractures-in-ovis-aries
#10
Adelina A Hernandez-Hurtado, Gissela Borrego-Soto, Ivan A Marino-Martinez, Jorge Lara-Arias, Viktor J Romero-Diaz, Adalberto Abrego-Guerra, Jose F Vilchez-Cavazos, Guillermo Elizondo-Riojas, Herminia G Martinez-Rodriguez, Marcela A Espinoza-Juarez, Gloria C Lopez-Romero, Alejandro Robles-Zamora, Oscar F Mendoza Lemus, Rocio Ortiz-Lopez, Augusto Rojas-Martinez
Adipose-derived mesenchymal stem cells (ADMSCs) are inducible to an osteogenic phenotype by the bone morphogenetic proteins (BMPs). This facilitates the generation of implants for bone tissue regeneration. This study evaluated the in vitro osteogenic differentiation of ADMSCs transduced individually and in combination with adenoviral vectors expressing BMP2 and BMP7. Moreover, the effectiveness of the implant containing ADMSCs transduced with the adenoviral vectors AdBMP2/AdBMP7 and embedded in demineralized bone matrix (DBM) was tested in a model of tibial fracture in sheep...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27812413/bone-protein-extractomics-comparing-the-efficiency-of-bone-protein-extractions-of-gallus-gallus-in-tandem-mass-spectrometry-with-an-eye-towards-paleoproteomics
#11
Elena R Schroeter, Caroline J DeHart, Mary H Schweitzer, Paul M Thomas, Neil L Kelleher
Proteomic studies of bone require specialized extraction protocols to demineralize and solubilize proteins from within the bone matrix. Although various protocols exist for bone protein recovery, little is known about how discrete steps in each protocol affect the subset of the bone proteome recovered by mass spectrometry (MS) analyses. Characterizing these different "extractomes" will provide critical data for development of novel and more efficient protein extraction methodologies for fossils. Here, we analyze 22 unique sub-extractions of chicken bone and directly compare individual extraction components for their total protein yield and diversity and coverage of bone proteins identified by MS...
2016: PeerJ
https://www.readbyqxmd.com/read/27806676/the-role-of-cell-seeding-bio-scaffolds-and-the-in-vivo-microenvironment-in-the-guided-generation-of-osteochondral-composite-tissue
#12
Jiao Wei, Tanja Herrler, Kai Liu, Dong Han, Mei Yang, Chuanchang Dai, Qing Feng Li
Tissue engineering based on cell seeding, bio-scaffolds, and growth factors has been widely applied for the reconstruction of tissue defects. Recent progress has fueled in vivo tissue engineering techniques in becoming hot topics in regenerative medicine and reconstructive surgery. To improve the efficacy of tissue engineering, we here investigated the roles of cell seeding, bio-scaffolds, growth factors, and in-vivo microenvironment in tissue regeneration. Bone marrow derived stem cells (BMSCs), allogenic demineralized bone matrix (DBM) as bio-scaffold, and growth factors bone morphogenetic protein 2/ transforming growth factor (BMP-2/TGF-β1), and the in-vivo microenvironment of rib periosteum and perichondrium were used in different combinations for the generation of osteochondral composite tissue...
November 2, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27799989/surgical-outcomes-of-anterior-cervical-fusion-using-deminaralized-bone-matrix-as-stand-alone-graft-material-single-arm-pilot-study
#13
Ho-Jung Chung, Jung-Woo Hur, Kyeong-Sik Ryu, Jin-Sung Kim, Ji-Hoon Seong
OBJECTIVE: To investigate the safety and efficacy of demineralized bone matrix (DBM) as a bone graft substitute for anterior cervical discectomy and fusion (ACDF) surgery. METHODS: Twenty consecutive patients treated with ACDF using stand-alone polyestheretherketone (PEEK) cages (Zero-P) with DBM(CGDBM100) were prospectively evaluated with a minimum of 6 months of follow-up. Radiologic efficacy was evaluated with a 6-point scoring method for osseous fusion using plain radiograph and computed tomogrpahy scans...
September 2016: Korean Journal of Spine
https://www.readbyqxmd.com/read/27798301/how-the-european-eel-anguilla-anguilla-loses-its-skeletal-framework-across-lifetime
#14
Tim Rolvien, Florian Nagel, Petar Milovanovic, Sven Wuertz, Robert Percy Marshall, Anke Jeschke, Felix N Schmidt, Michael Hahn, P Eckhard Witten, Michael Amling, Björn Busse
European eels (Anguilla anguilla) undertake an impressive 5 000 km long migration from European fresh waters through the North Atlantic Ocean to the Sargasso Sea. Along with sexual maturation, the eel skeleton undergoes a remarkable morphological transformation during migration, where a hitherto completely obscure bone loss phenomenon occurs. To unravel mechanisms of the maturation-related decay of the skeleton, we performed a multiscale assessment of eels' bones at different life-cycle stages. Accordingly, the skeleton reflects extensive bone loss that is mediated via multinucleated bone-resorbing osteoclasts, while other resorption mechanisms such as osteocytic osteolysis or matrix demineralization were not observed...
October 26, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27790585/clinical-and-radiologic-evaluation-of-regenerative-potential-of-nha-paste-and-dbm-in-the-treatment-of-periodontal-intra-bony-defects-a-randomized-control-trial
#15
Deepti Jain, Anshul Sawhney, Bharat Gupta, Saurabh Sharma, Saurabh Juneja, Manjushree Juneja, Shruti Sharma, Neha Patil
INTRODUCTION: Previous studies have shown that Hydroxyapatite (HA) has shown good results in the treatment of intra-osseous periodontal defects. A newer variety of HA has been designed over a period of research which has nano-sized particles and is availed in a paste consistency called Nanocrystalline Hydroxyapatite paste (NHA paste). This variation in size and surface area of NHA paste can provide better results when used in intra-bony defects. AIM: The purpose of this study was to compare the clinical and radiographic outcomes obtained with usage of NHA paste to those obtained with Demineralized Bone Matrix (DBM) in the treatment of periodontal intra-bony defects...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27789903/dynamic-perfusion-culture-of-human-outgrowth-endothelial-progenitor-cells-on-demineralized-bone-matrix-in-vitro
#16
Di-Xin Cai, Yue Quan, Peng-Ju He, Hong-Bo Tan, Yong-Qing Xu
BACKGROUND The aim of this study was to investigate the proliferation, differentiation, and tube formation of human outgrowth endothelial progenitor cells (OECs) cultured with porous demineralized bone matrix (DBM) under a dynamic perfusion system in vitro. MATERIAL AND METHODS OECs were isolated, expanded, characterized, eGFP-transfected and seeded on DBM scaffold and cultured under static or dynamic perfusion conditions, and continuously observed under fluorescence microscope. DBM scaffolds were harvested on day six for RT-PCR and western blot assay to analyze the mRNA and protein expression level of CD34, VE-cadherin, and VEGF...
October 28, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27751830/promoting-ossification-of-calvarial-defects-in-craniosynostosis-surgery-by-demineralized-bone-plate-and-bone-dust-in-different-age-groups
#17
M Savolainen, A Ritvanen, J Hukki, P Vuola, J Telkkä, J Leikola
Correction of calvarial defects after calvarial vault reconstruction (CVR) is challenging in craniosynostosis patients of advanced age and typically employs autologous bone. Demineralized bone matrix (DBM) is a potential alternative material for autologous bone, but its use has not been extended to correct calvarial defects. CVR patients operated at the Department of Plastic Surgery, Helsinki University Hospital, during 2008-2010 were retrospectively reviewed. Inclusion criteria of the study were CVR patients who received DBM plate, with or without bone dust, on calvarial defects and who had suitable uncovered defect on the contralateral side as control...
September 20, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/27748516/oxygen-mapping-probing-a-novel-seeding-strategy-for-bone-tissue-engineering
#18
Ines Westphal, Claudia Jedelhauser, Gregor Liebsch, Arnd Wilhelmi, Attila Aszodi, Matthias Schieker
Bone tissue engineering (BTE) utilizing biomaterial scaffolds and human mesenchymal stem cells (hMSCs) is a promising approach for the treatment of bone defects. The quality of engineered tissue is crucially affected by numerous parameters including cell density and the oxygen supply. In this study, a novel oxygen-imaging sensor was introduced to monitor the oxygen distribution in three dimensional (3D) scaffolds in order to analyze a new cell-seeding strategy. Immortalized hMSCs, pre-cultured in a monolayer for 30-40% or 70-80% confluence, were used to seed demineralized bone matrix (DBM) scaffolds...
October 17, 2016: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/27718449/amecm-dcb-scaffold-prompts-successful-total-meniscus-reconstruction-in-a-rabbit-total-meniscectomy-model
#19
Zhiguo Yuan, Shuyun Liu, Chunxiang Hao, Weimin Guo, Shuang Gao, Mingjie Wang, Mingxue Chen, Zhen Sun, Yichi Xu, Yu Wang, Jiang Peng, Mei Yuan, Quan-Yi Guo
Tissue-engineered meniscus regeneration is a very promising treatment strategy for meniscus lesions. However, generating the scaffold presents a huge challenge for meniscus engineering as this has to meet particular biomechanical and biocompatibility requirements. In this study, we utilized acellular meniscus extracellular matrix (AMECM) and demineralized cancellous bone (DCB) to construct three different types of three-dimensional porous meniscus scaffold: AMECM, DCB, and AMECM/DCB, respectively. We tested the scaffolds' physicochemical characteristics and observed their interactions with meniscus fibrochondrocytes to evaluate their cytocompatibility...
December 2016: Biomaterials
https://www.readbyqxmd.com/read/27718044/the-osteoclasts-attach-to-the-bone-surface-where-the-extracellular-calcium-concentration-decreases
#20
Bilu Xiang, Yang Liu, Lu Xie, Qian Zhao, Ling Zhang, Xueqi Gan, Haiyang Yu
Osteoclasts demineralize and resorb bone once they attach to its surface. However, it's still unclear how the osteoclasts choose the specific sites for their attachments. It is postulated in this article that the decreased extracellular free ionized calcium concentration (Ca(2+)[e]) can provide a microenvironment for osteoclasts to recognize and then initiate the attachment process. The osteoclasts initially attach to the bone surface via integrating its integrin αvβ3 and RGD containing ligands in bone matrix...
October 7, 2016: Cell Biochemistry and Biophysics
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