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Osteoinduction

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https://www.readbyqxmd.com/read/28819219/the-fabrication-of-an-ica-sf-plcl-nanofibrous-membrane-by-coaxial-electrospinning-and-its-effect-on-bone-regeneration-in-vitro-and-in-vivo
#1
Lihua Yin, Kaijuan Wang, Xiaoqin Lv, Rui Sun, Shaohua Yang, Yujie Yang, Yanyun Liu, Jiatao Liu, Jing Zhou, Zhanhai Yu
GBR is currently accepted as one of the most effective approaches for bone defect regeneration relating to dental implant. Icariin is the main active ingredient in the extraction of total flavonoids from the Chinese traditional herb Epimediumbrevicornum Maxim. In this study, ICA was successfully incorporated into the nanofibers barrier membrane (ICA-SF/PLCL) as osteoinduction factor by coaxial electrospinning and was released in a sustained and controlled manner. The entire release period included two stages: an initial burst stage (47...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817981/the-use-of-flexible-intramedullary-nails-in-limb-lengthening
#2
Arnold Popkov, Patrick Foster, Alexander Gubin, Dmitry Borzunov, Dmitry Popkov
Lower and upper limb length discrepancy and deformity, congenital or acquired, are amongst the most common conditions in children for orthopaedic referral. Over the last twenty years, surgical techniques have evolved in an attempt to decrease Healing Index and minimise these complications. Areas covered: The flexible intramedullary nailing (FIN) is a minimally invasive intramedullary osteosynthesis. In combination with an external fixator, it is appropriated for pediatric bone lengthenings and lengthening of bones of small diameter in adults...
August 18, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28815162/clinical-application-of-ceramics-in-anterior-cervical-discectomy-and-fusion-a-review-and-update
#3
REVIEW
Shayan Abdollah Zadegan, Aidin Abedi, Seyed Behnam Jazayeri, Hirbod Nasiri Bonaki, Alexander R Vaccaro, Vafa Rahimi-Movaghar
STUDY DESIGN: Narrative review. OBJECTIVES: Anterior cervical discectomy and fusion (ACDF) is a reliable procedure, commonly used for cervical degenerative disc disease. For interbody fusions, autograft was the gold standard for decades; however, limited availability and donor site morbidities have led to a constant search for new materials. Clinically, it has been shown that calcium phosphate ceramics, including hydroxyapatite (HA) and tricalcium phosphate (TCP), are effective as osteoconductive materials and bone grafts...
June 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28814954/intrinsic-osteoinductivity-of-porous-titanium-scaffold-for-bone-tissue-engineering
#4
Maryam Tamaddon, Sorousheh Samizadeh, Ling Wang, Gordon Blunn, Chaozong Liu
Large bone defects and nonunions are serious complications that are caused by extensive trauma or tumour. As traditional therapies fail to repair these critical-sized defects, tissue engineering scaffolds can be used to regenerate the damaged tissue. Highly porous titanium scaffolds, produced by selective laser sintering with mechanical properties in range of trabecular bone (compressive strength 35 MPa and modulus 73 MPa), can be used in these orthopaedic applications, if a stable mechanical fixation is provided...
2017: International Journal of Biomaterials
https://www.readbyqxmd.com/read/28812170/a-novel-approach-to-utilize-icariin-as-icariin-derived-ecm-on-small-intestinal-submucosa-scaffold-for-bone-repair
#5
Mei Li, Chi Zhang, Yi Zhong, Jiyuan Zhao
Icariin (Ic) has been demonstrated as a potent osteoinductive compound for bone tissue engineering. However, toxic side effects of the drug and poor biocompatibility of drug delivery systems (DDSs) still limit its application for bone repair in the clinic. To overcome these disadvantages and utilize the osteoinductivity of Ic, we developed a novel method to utilize Ic as an Ic-derived osteoinductive extracellular matrix (ECM) on small intestinal submucosa (SIS) (Ic-ECM-SIS). The generated Ic-ECM-SIS scaffolds, as a natural construct, exhibited much better biocompatibility (including cell adhesion, cell survival and cell proliferation) than Ic-SIS scaffolds generated by traditional DDSs...
August 15, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28809431/transdifferentiation-of-myoblasts-into-osteoblasts-possible-use-for-bone-therapy
#6
REVIEW
Daphne P L Lin, Revathy Carnagarin, Arun Dharmarajan, Crispin R Dass
OBJECTIVES: Transdifferentiation is defined as the conversion of one cell type to another and is an ever-expanding field with a growing number of cells found to be capable of such a process. To date, the fact remains that there are limited treatment options for fracture healing, osteoporosis and bone repair post-destruction by bone tumours. Hence, this review focuses on the transdifferentiation of myoblast to osteoblast as a means to further understand the transdifferentiation process and to investigate a potential therapeutic option if successful...
August 15, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28808623/use-of-recombinant-human-bone-morphogenetic-protein-2-in-spine-surgery
#7
REVIEW
Marios Lykissas, Ioannis Gkiatas
Bone morphogenetic proteins are osteoinductive factors which have gained popularity in orthopaedic surgery and especially in spine surgery. The use of recombinant human bone morphogenetic protein-2 has been officially approved by the United States Food and Drug Administration only for single level anterior lumbar interbody fusion, nevertheless it is widely used by many surgeons with off-label indications. Despite advantages in bone formation, its use still remains a controversial issue and several complications have been described by authors who oppose their wide use...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28800464/accelerated-biomineralization-of-graphene-oxide-incorporated-cellulose-acetate-nanofibrous-scaffolds-for-mesenchymal-stem-cell-osteogenesis
#8
Xiaoyun Liu, He Shen, Saijie Song, Wei Chen, Zhijun Zhang
For bone tissue engineering, it requires that the scaffolds have excellent biocompatibility, proper mechanical and osteoinductive properties. Electrospun nanofibers with extracellular matrices mimicking structure have proven to be good scaffolds for bone tissue repairing. Hybrid nanofibers in particular, endow the nanofibers with specific and multiple functionalities, and therefore have attracted increasing interests in the recent years. In this study, we fabricated graphene oxide (GO)-incorporated cellulose acetate (CA) nanofibrous scaffolds by electrospinning technique for enhancement of biomineralization and osteogenic differentiation of human mesenchymal stem cells (hMSCs)...
July 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28798376/3d-biomimetic-artificial-bone-scaffolds-with-dual-cytokines-spatiotemporal-delivery-for-large-weight-bearing-bone-defect-repair
#9
Xiaogang Bao, Lingjun Zhu, Xiaodong Huang, Dezhi Tang, Dannong He, Jiangang Shi, Guohua Xu
It is a great challenge to prepare "functional artificial bone" for the repair of large segmental defect, especially in weight-bearing bones. In this study, bioactive HA/PCL composite scaffolds that possess anatomical structure as autogenous bone were fabricated by CT-guided fused deposition modeling technique. The scaffolds can provide mechanical support and possess osteoconduction property. Then the VEGF-165/BMP-2 loaded hydrogel was filled into biomimetic artificial bone spatially to introduce osteoinduction and angioinduction ability via sustained release of these cytokines...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795778/time-dependent-effect-of-electrical-stimulation-on-osteogenic-differentiation-of-bone-mesenchymal-stromal-cells-cultured-on-conductive-nanofibers
#10
Siqi Zhu, Wei Jing, Xiaoqing Hu, Zirong Huang, Qing Cai, Yingfang Ao, Xiaoping Yang
Bone tissue engineering using bone mesenchymal stromal cells (BMSCs) is a multidisciplinary strategy that requires biodegradable scaffold, cell, various promoting cues to work simultaneously. Electrical stimulation (ES) is known able to promote osteogenic differentiation of BMSCs, but it is interesting to know how can it play the strongest promotion effect. To strengthen local ES on BMSCs, parallel-aligned conductive nanofibers were electrospun from the mixtures of poly(L-lactide) (PLLA) and multi-walled carbon nanotubes (MWCNTs), and used for cell culture...
August 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28773906/novel-resorbable-and-osteoconductive-calcium-silicophosphate-scaffold-induced-bone-formation
#11
Patricia Ros-Tárraga, Patricia Mazón, Miguel A Rodríguez, Luis Meseguer-Olmo, Piedad N De Aza
This aim of this research was to develop a novel ceramic scaffold to evaluate the response of bone after ceramic implantation in New Zealand (NZ) rabbits. Ceramics were prepared by the polymer replication method and inserted into NZ rabbits. Macroporous scaffolds with interconnected round-shaped pores (0.5-1.5 mm = were prepared). The scaffold acted as a physical support where cells with osteoblastic capability were found to migrate, develop processes, and newly immature and mature bone tissue colonized on the surface (initially) and in the material's interior...
September 20, 2016: Materials
https://www.readbyqxmd.com/read/28772708/nurse-s-a-phase-material-enhance-adhesion-growth-and-differentiation-of-human-bone-marrow-derived-stromal-mesenchymal-stem-cells
#12
Ruben Rabadan-Ros, Salvador Aznar-Cervantes, Patricia Mazón, Patricia Ros-Tarraga, Piedad N De Aza, Luis Meseguer-Olmo
The purpose of this study was to evaluate the bioactivity and cell response of a well-characterized Nurse's A-phase (7CaO·P₂O₅·2SiO₂) ceramic and its effect compared to a control (tissue culture polystyrene-TCPS) on the adhesion, viability, proliferation, and osteogenic differentiation of ahMSCs in vitro. Cell proliferation (Alamar Blue Assay), Alizarin Red-S (AR-s) staining, alkaline phosphatase (ALP) activity, osteocalcin (OCN), and collagen I (Col I) were evaluated. Also, field emission scanning electron microscopy (FESEM) images were acquired in order to visualise the cells and the topography of the material...
March 27, 2017: Materials
https://www.readbyqxmd.com/read/28769083/human-adipose-derived-mesenchymal-stem-cells-seeded-into-a-collagen-hydroxyapatite-scaffold-promote-bone-augmentation-after-implantation-in-the-mouse
#13
Giovanna Calabrese, Raffaella Giuffrida, Stefano Forte, Claudia Fabbi, Elisa Figallo, Lucia Salvatorelli, Lorenzo Memeo, Rosalba Parenti, Massimo Gulisano, Rosario Gulino
Traumatic injury or surgical excision of diseased bone tissue usually require the reconstruction of large bone defects unable to heal spontaneously, especially in older individuals. This is a big challenge requiring the development of biomaterials mimicking the bone structure and capable of inducing the right commitment of cells seeded within the scaffold. In particular, given their properties and large availability, the human adipose-derived stem cells are considered as the better candidate for autologous cell transplantation...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28767464/role-of-osteogenic-coatings-on-implant-surfaces-in-promoting-bone-to-implant-contact-in-experimental-osteoporosis-a-systematic-review-and-meta-analysis
#14
Alexis Ghanem, Sergio Varela Kellesarian, Tariq Abduljabbar, Nawwaf Al-Hamoudi, Fahim Vohra, Fawad Javed
OBJECTIVE: The aim of this systematic review and meta-analysis was to evaluate the role of osteogenic coatings (placement of a thin film of organic and inorganic osteoinductive and osteoproliferative materials) on implant surfaces in augmenting bone-to-implant contact (BIC) in osteoporotic bone. DATA SOURCES: To answer the focused question "Do osteogenic coatings on implant surfaces increase BIC in osteoporotic bone?" PubMed/MEDLINE, EMBASE, ISI Web of Knowledge, Scopus, and Google-Scholar databases were searched till June 2017 using different combinations of the following key words: bone-to-implant contact, coating, implant surface, osseointegration, and osteoporosis...
July 31, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28762869/endocultivation-of-scaffolds-with-rhbmp-2-and-vegf165-in-the-omentum-majus-in-a-rabbit-model
#15
Falk Birkenfeld, Andre Sengebusch, Chiara Voelschow, Hendrik Naujokat, Björn Möller, Henning Wieker, Joerg Wiltfang
The reconstruction of defects in the mandible are still challenging. Despite several adequate microvascular bone reconstruction techniques there is a need for ectopic bone endocultivation without drawbacks by donor site morbidity. The omentum majus is described as a good vascularized fleece with undifferentiated cells with potential for bone culturing. In the omentum majus of six rabbits two hydroxyapatite blocks were incorporated for 12 weeks each. The blocks were prepared with rhBMP-2 or VEGF165+rhBMP-2 and wrapped into the omentum...
August 1, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28761974/dicalcium-phosphate-anhydrous-an-appropriate%C3%A2-bioceramic-in-regeneration-of-critical-sized-radial-bone-defects-in-rats
#16
Ahmad Oryan, Soodeh Alidadi, Amin Bigham-Sadegh
The present study aimed to evaluate and compare the effectiveness of composites of calcium phosphates including β-tri calcium phosphate (β-TCP), dicalcium phosphate anhydrous (DCPA, monetite), mono-calcium phosphate monohydrate (MCPM), and hydroxyapatite (HA) with the chitosan-gelatin-platelet gel (CGP) on the healing of experimentally induced critical size radial bone defects in rats after 8 weeks of injury. Eighty bilateral bone defects were created in the radial bones of 40 adult male Sprague-Dawley rats...
July 31, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28761445/in-vitro-and-in-vivo-dentinogenic-efficacy-of-human-dental-pulp-derived-cells-induced-by-demineralized-dentin-matrix-and-ha-tcp
#17
Kyung-Jung Kang, Min Suk Lee, Chan-Woong Moon, Jae-Hoon Lee, Hee Seok Yang, Young-Joo Jang
Human dental pulp cells have been known to have the stem cell features such as self-renewal and multipotency. These cells are differentiated into hard tissue by addition of proper cytokines and biomaterials. Hydroxyapatite-tricalcium phosphates (HA-TCPs) are essential components of hard tissue and generally used as a biocompatible material in tissue engineering of bone. Demineralized dentin matrix (DDM) has been reported to increase efficiency of bone induction. We compared the efficiencies of osteogenic differentiation and in vivo bone formation of HA-TCP and DDM on human dental pulp stem cells (hDPSCs)...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28755493/osteoinductive-porous-biphasic-calcium-phosphate-ceramic-as-an-alternative-to-autogenous-bone-grafting-in-the-treatment-of-mandibular-bone-critical-size-defects
#18
Paula Sanches Santos, Tania Mary Cestari, Jéssica Botto Paulin, Renato Martins, Caroline Andrade Rocha, Ricardo Vinícius Nunes Arantes, Bruna Carolina Costa, Cássio Morilla Dos Santos, Gerson Francisco Assis, Rumio Taga
The bone-induction capacity of a porous biphasic calcium phosphate (pBCP) using heterotopic implantation in mouse (mHI-model) and its efficacy as substitute for autograft in mandibular critical-size defect in rabbit (rabMCSD-model) was investigated. In mHI-model, pBCP was implanted into the thigh muscles and bone formation was histomorphometrically and immunohistochemically evaluated. In rabMCSD-model, 13 mm bone defects were treated with pBCP or autograft and bone repair comparatively evaluated by radiographic and histomorphometric methods...
July 29, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28755164/-allogeneic-transplants-for-biological-reconstruction-of-bone-defects
#19
REVIEW
R Windhager, G M Hobusch, M Matzner
A combination of allogeneic and autologous bone transplants is frequently used for the biological reconstruction of bone defects. Autologous bone transplants can be used either in the form of structural or cancellous bone transplants. The osteogenic potential of autologous cancellous bone is well-known and is still the gold standard with respect to osteoinduction and remodelling. Structural transplants, such as fibular and tricortical iliac crest grafts can be transplanted either free, i.e. non-vascularized or vascularized with anastomosed vessels...
August 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28752993/effects-of-mgo-and-sio2-on-plasma-sprayed-hydroxyapatite-coating-an-in-vivo-study-in-rat-distal-femoral-defects
#20
Dongxu Ke, Samuel F Robertson, William S Dernell, Amit Bandyopadhyay, Susmita Bose
Plasma-sprayed hydroxyapatite (HA)-coated titanium implants have been widely used in orthopedic applications due to their inheritance of an excellent mechanical property from titanium and great osteoconductivity from HA. However, the lack of osteoinductivity limits their further applications. In this study, 1 wt % MgO and 0.5 wt % SiO2 were mixed with HA for making plasma-sprayed coatings on titanium implants. Plasma-sprayed HA- and MgO/SiO2-HA-coated titanium implants showed adhesive bond strengths of 25.73 ± 1...
August 9, 2017: ACS Applied Materials & Interfaces
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