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https://www.readbyqxmd.com/read/28220264/treatment-of-stage-ii-medication-related-osteonecrosis-of-the-jaw-with-necrosectomy-and-autologous-bone-marrow-mesenchymal-stem-cells
#1
Pit Jacob Voss, Akihiko Matsumoto, Esteban Alvarado, Rainer Schmelzeisen, Fabian Duttenhöfer, Philipp Poxleitner
Treatment strategies for medication-related osteonecrosis of the jaw (MRONJ) remain controversial. Although the AAOMS suggests a conservative approach, a surgical management with necrosectomy is often required when conservative management has failed. Moreover, recent studies have shown promising results using an early stage surgical treatment. Over the past decade, cell-based bone regeneration utilizing bone marrow mesenchymal stem cells (MSCs) received increased attention. MSCs are known to promote wound healing and induce new bone formation in compromised tissue...
February 20, 2017: Odontology
https://www.readbyqxmd.com/read/28210626/osteogenic-differentiation-capacity-of-in-vitro-cultured-human-skeletal-muscle-for-expedited-bone-tissue-engineering
#2
Chunlei Miao, Lulu Zhou, Lufeng Tian, Yingjie Zhang, Wei Zhang, Fanghong Yang, Tianyi Liu, Shengjian Tang, Fangjun Liu
Expedited bone tissue engineering employs the biological stimuli to harness the intrinsic regenerative potential of skeletal muscle to trigger the reparative process in situ to improve or replace biological functions. When genetically modified with adenovirus mediated BMP2 gene transfer, muscle biopsies from animals have demonstrated success in regenerating bone within rat bony defects. However, it is uncertain whether the human adult skeletal muscle displays an osteogenic potential in vitro when a suitable biological trigger is applied...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28134829/early-healing-events-after-periodontal-surgery-observations-on-soft-tissue-healing-microcirculation-and-wound-fluid-cytokine-levels
#3
Doğan Kaner, Mouaz Soudan, Han Zhao, Georg Gaßmann, Anna Schönhauser, Anton Friedmann
Early wound healing after periodontal surgery with or without enamel matrix derivative/biphasic calcium phosphate (EMD/BCP) was characterized in terms of soft tissue closure, changes of microcirculation, and expression of pro- and anti-inflammatory cytokines in gingival crevicular fluid/wound fluid (GCF/WF). Periodontal surgery was carried out in 30 patients (18 patients: application of EMD/BCP for regeneration of bony defects; 12 patients: surgical crown lengthening (SCL)). Healthy sites were observed as untreated controls...
January 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28130564/histologic-and-histomorphometric-evaluation-of-bone-regeneration-using-nanocrystalline-hydroxyapatite-and-human-freeze-dried-bone-graft-an-experimental-study-in-rabbit
#4
Rokhsareh Sadeghi, Mohammad Najafi, Hassan Semyari, Fatemeh Mashhadiabbas
PURPOSE: Bone regeneration is an important concern in periodontal treatment and implant dentistry. Different biomaterials and surgical techniques have been used for this purpose. The aim of the present study was to compare the effect of nanocrystalline hydroxyapatite and human freeze-dried bone graft (FDBG) in regeneration of rabbit calvarium bony defects by histologic and histomorphometric evaluation. METHODS: In this experimental study, three similar defects, measuring 8 mm in diameter, were created in the calvaria of 16 white New Zealand rabbits...
January 27, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28128898/tri-layered-nanocomposite-hydrogel-scaffold-for-the-concurrent-regeneration-of-cementum-periodontal-ligament-and-alveolar-bone
#5
S Sowmya, Ullas Mony, P Jayachandran, S Reshma, R Arun Kumar, H Arzate, Shantikumar V Nair, R Jayakumar
A tri-layered scaffolding approach is adopted for the complete and concurrent regeneration of hard tissues-cementum and alveolar bone-and soft tissue-the periodontal ligament (PDL)-at a periodontal defect site. The porous tri-layered nanocomposite hydrogel scaffold is composed of chitin-poly(lactic-co-glycolic acid) (PLGA)/nanobioactive glass ceramic (nBGC)/cementum protein 1 as the cementum layer, chitin-PLGA/fibroblast growth factor 2 as the PDL layer, and chitin-PLGA/nBGC/platelet-rich plasma derived growth factors as the alveolar bone layer...
January 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28110999/effect-of-hypoxia-on-the-proliferation-of-porcine-bone-marrow-derived-mesenchymal-stem-cells-and-adipose-derived-mesenchymal-stem-cells-in-2-and-3-dimensional-culture
#6
Egon Burian, Florian Probst, Benjamin Palla, Christina Riedel, Maximilian Michael Saller, Matthias Cornelsen, Florian König, Matthias Schieker, Sven Otto
OBJECTIVE: Bone marrow-derived mesenchymal stem cells (MSCs) and adipose-derived mesenchymal stem cells (ASCs) currently represent a promising tool for the regeneration of large bony defects. Therefore, it is pivotal to find the best cell source within the body and the best conditions for in vitro cellular expansion. This study compared cellular response of MSCs and ASCs from a porcine animal in normoxic (21% O2) and hypoxic (2% O2) cell culture conditions via 2D and 3D experimental settings...
December 20, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28093892/multinucleated-giant-cells-in-the-implant-bed-of-bone-substitutes-are-foreign-body-giant-cells-new-insights-into-the-material-mediated-healing-process
#7
Mike Barbeck, Patrick Booms, Ronald Unger, Verena Hoffmann, Robert Sader, Charles James Kirkpatrick, Shahram Ghanaati
In addition to macrophages, multinucleated giant cells (MNGCs) are involved in the tissue reaction to a variety of biomaterials. Especially in the case of bone substitute materials it has been assumed that the MNGCs are osteoclasts, based on the chemical and physical similarity of many materials to the calcified matrix and the bony environment in which they are used. However, many studies indicate that these cells belong to the cell line of the foreign body giant cells (FBGCs), which are of "inflammatory origin", although they have been shown to possess both a pro- and also anti-inflammatory phenotype...
January 17, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28060094/the-bioresorption-and-guided-bone-regeneration-of-absorbable-hydroxyapatite-coated-magnesium-mesh
#8
Soo-Hwan Byun, Ho-Kyung Lim, Soung-Min Kim, Sung-Mi Lee, Hyoun-Ee Kim, Jong-Ho Lee
INTRODUCTION: Nonabsorbable metallic membrane for guided bone regeneration is remained permanently even though after complete healing. There would be metallic exposure followed by the risk of infection; the membrane should be removed for the additional procedure such as implant installation. Since absorbable nonmetallic mesh is absorbed within 3 to 6 months, it is unnecessary to be removed. However, the absorbable membrane shows lower retention, lower mechanical strength, and difficulty of manipulation than the nonabsorbable ones...
January 5, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28028422/can-low-level-laser-therapy-benefit-bone-regeneration-in-localized-maxillary-cystic-defects-a-prospective-randomized-control-trial
#9
Ahmed Abbas Zaky, Hanaa Mohamed Mohamed El Shenawy, Tarek Abdel Hamed Harhsh, Mahmoud Shalash, Noha Mohamed Ismael Awad
AIM: The aim of the study was to evaluate the effect of Low-Level Laser Therapy (LLLT) on bone formation in cystic defects following cyst enucleation. PATIENTS AND METHODS: The sample was composed of sixteen patients with enucleated maxillary bony cystic lesions. With an age range from 20 - 44 grouped as eight Laser and eight Control patients. Laser group was subjected to low intensity diode laser immediately after surgery and then for three times per week for two weeks using a therapeutic laser irradiation...
December 15, 2016: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/27977491/could-calcified-triglyceride-bone-cement-be-an-alternative-graft-material-in-maxillary-sinus-augmentation
#10
Seda Yilmaz, Bora Ozden, Burcu Bas, Gamze Altun, Berrin Zuhal Altunkaynak
The ideal graft material for maxillary sinus augmentation is still a matter of controversy and the search for a more appropriate bone substitute for use continues. The aim of this study was to evaluate bone formation as a sign of the regeneration following maxillary sinus augmentation in rabbits using 3 different biomaterials, one of which is a newly developed graft material; calcified triglyceride bone cement (CTBC).Twenty-one New Zealand rabbits were used and randomly divided into 3 groups. Bilateral maxillary sinus augmentation was carried out and autogenous bone (AB), bovine hydroxyapatite (BHA), and CTBC were administered...
January 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27910818/histomorphometric-and-transcriptome-evaluation-of-early-healing-bone-treated-with-a-novel-human-particulate-dentin-powder
#11
Yu-Chih Huang, Wei-Zhen Lew, Sheng-Wei Feng, Wei-Yi Lai, Yoshimitsu Abiko, Haw-Ming Huang
Human particulate dentin (HPD) shows potential as an alternative bone grafting material. However, the mechanism of bone healing at the molecular level after grafting with HPD is unclear. This study assessed the histological and global gene expression of bone tissues grafted with HPD. The HPD was prepared to 250-500 µm in size. X-ray diffraction (XRD) and energy dispersive x-ray spectroscopy (EDX) were performed to confirm the crystal structure, organic compound residues, and surface morphology, respectively...
December 2, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27896935/sandcastle-worm-inspired-blood-resistant-bone-graft-binder-using-a-sticky-mussel-protein-for-augmented-in-vivo-bone-regeneration
#12
Hyo Jeong Kim, Bong-Hyuk Choi, Sang Ho Jun, Hyung Joon Cha
Xenogenic bone substitutes are commonly used during orthopedic reconstructive procedures to assist bone regeneration. However, huge amounts of blood accompanied with massive bone loss usually increase the difficulty of placing the xenograft into the bony defect. Additionally, the lack of an organic matrix leads to a decrease in the mechanical strength of the bone-grafted site. For effective bone grafting, this study aims at developing a mussel adhesion-employed bone graft binder with great blood-resistance and enhanced mechanical properties...
December 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27869327/the-selective-serotonin-re-uptake-inhibitor-fluoxetine-directly-inhibits-osteoblast-differentiation-and-mineralization-during-fracture-healing-in-mice
#13
V Bradaschia-Correa, A M Josephson, D Mehta, M Mizrahi, S S Neibart, C Liu, O D Kennedy, A B Castillo, K A Egol, P Leucht
Chronic use of selective serotonin re-uptake inhibitors (SSRI) for the treatment of depression has been linked to osteoporosis. In this study, we investigated the effect of chronic SSRI use on fracture healing in two murine models of bone regeneration. First, we performed a comprehensive analysis of endochondral bone healing in a femur fracture model. C57/BL6 mice treated with fluoxetine, the most commonly prescribed SSRI, developed a normal cartilaginous soft-callus at 14 days after fracture and demonstrated a significantly smaller and biomechanically weaker bony hard-callus at 28 days...
November 21, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27860377/local-application-of-lactoferrin-promotes-bone-regeneration-in-a-rat-critical-sized-calvarial-defect-model-as-demonstrated-by-micro-ct-and-histological-analysis
#14
Ryan Gao, Maureen Watson, Karen E Callon, Donna Tuari, Michael S Dray, Dorit Naot, Satya Amirapu, Jacob T Munro, Jillian Cornish, David S Musson
Lactoferrin is a multifunctional glycoprotein with therapeutic potential for bone tissue engineering. The aim of this study was to assess the efficacy of local application of lactoferrin on bone regeneration. Five-millimetre critical-sized defects were created over the right parietal bone in 64 Sprague-Dawley rats. The rats were randomized into four groups: group 1 (n = 20) had empty defects; group 2 (n = 20) had defects grafted with collagen gels (3 mg/mL); group 3 (n = 20) had defects grafted with collagen gels impregnated with bovine lactoferrin (10 µg/gel) and group 4 (n = 4) had sham surgeries (skin and periosteal incisions only)...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27834419/limitations-and-options-using-resorbable-versus-nonresorbable-membranes-for-successful-guided-bone-regeneration
#15
Nikolaos K Soldatos, Popi Stylianou, Vasiliki P Koidou, Nikola Angelov, Raymond Yukna, Georgios E Romanos
OBJECTIVE: Deficient bony ridges often complicate the implant treatment plan. Several treatment modalities are used to regenerate bone, including guided bone regeneration (GBR). The purpose of this study was to summarize the knowledge on different types of membranes available and currently used in GBR procedures in a staged approach or with simultaneous implant placement. The primary role of the membranes is to exclude epithelial and connective tissue cells from the wound area to be regenerated, and to create and maintain the space into which pluripotential and osteogenic cells are free to migrate...
November 10, 2016: Quintessence International
https://www.readbyqxmd.com/read/27790579/pure-titanium-membrane-ultra-ti-%C3%A2-in-the-treatment-of-periodontal-osseous-defects-a-split-mouth-comparative-study
#16
Rashmi Khanna, Rajeev Khanna, Nilesh Dinesh Pardhe, Nancy Srivastava, Manas Bajpai, Shailendra Gupta
INTRODUCTION: Although many different types of Guided Tissue Regeneration (GTR) membranes (resorbable/non-resorbable, including titanium mesh) have been used in the field of Periodontics till now, but this is the first and only clinical study testing the effectiveness of an ultra thin pure Titanium Membrane (Ultra Ti) as a GTR membrane in infra-bony periodontal defects. AIM: To compare the efficacy of GTR in intra-bony defects with newly introduced non-resorbable barrier membrane, made of titanium called "Ultra-Ti (®) GTR Membrane" versus open flap debridement...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27766028/targeting-p38-pathway-regulates-bony-formation-via-msc-recruitment-during-mandibular-distraction-osteogenesis-in-rats
#17
Zi-Hui Yang, Bao-Lei Wu, Chen Ye, Sen Jia, Xin-Jie Yang, Rui Hou, De-Lin Lei, Lei Wang
Distraction osteogenesis (DO) is a widely used self-tissue engineering. However, complications and discomfort due to the long treatment period are still the bottleneck of DO. Novel strategies to accelerate bone formation in DO are still needed. P38 is capable of regulating the osteogenic differentiation of both mesenchymal stem cells (MSCs) and osteoblasts, which are crucial to bone regeneration. However, it is not clear whether targeting p38 could regulate bony formation in DO. The purpose of the current work was to investigate the effects of local application of either p38 agonist anisomycin or p38 inhibitor SB203580 in a rat model of DO...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27762665/sutures-possess-strong-regenerative-capacity-for-calvarial-bone-injury
#18
Shery Park, Hu Zhao, Mark Urata, Yang Chai
Repair of calvarial bony defects remains challenging for craniofacial surgeons. Injury experiments on animal calvarial bones are widely used to study healing mechanisms and test tissue engineering approaches. Previously, we identified Gli1+ cells within the calvarial sutures as stem cells supporting calvarial bone turnover and injury repair. In this study, we tested the regenerative capacity of the suture region compared with other areas of calvarial bone. Injuries were made to mouse sagittal sutures or other areas of the calvarial bone at varying distances from the suture...
December 1, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27673512/short-link-n-can-induce-regeneration-of-the-early-degenerate-intervertebral-disc-in-a-novel-long-term-organ-culture-model-that-includes-the-bony-vertebrae
#19
Nizar Algarni, Michael Grant, Laura M Epure, Omar Salem, Rakan Farouk Bokhari, John Antoniou, Fackson Mwale
Link N (DHLSDNYTLDHDRAIH), is a naturally occurring peptide that can stimulate matrix production in vitro, in vivo and in intact ex vivo human intervertebral discs (IVDs). We have recently discovered that annulus fibrosus cells (AF) cells have the ability to proteolytically process Link N resulting in a fragment spanning amino acid residues 1-8 short Link N (sLink N). Separately, we recently developed and validated a large animal disc organ culture model that maintains long-term cell viability while retaining the bony endplates and vertebral bone (vIVDs; IVD with intact vertebrae)...
September 27, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27636714/accelerated-bony-defect-healing-based-on-chitosan-thermosensitive-hydrogel-scaffolds-embedded-with-chitosan-nanoparticles-for-the-delivery-of-bmp2-plasmid-dna
#20
Hui Li, Qiuxia Ji, Ximin Chen, Yan Sun, Quanchen Xu, Panpan Deng, Fang Hu, Jianjun Yang
Regeneration of alveolar bone is among the main purposes of periodontal treatment. However, it is a challenge for both dentists and patients. An injectable chitosan-based thermosensitive hydrogel scaffold (CS/CSn-GP) was successfully designed and prepared with the incorporation of bone morphogenetic protein-2 plasmid DNA (pDNA-BMP2)-loaded chitosan nanoparticles (CS/CSn(pDNA-BMP2)-GP) in this study. The aim of this study was to evaluate the regenerative effect of this scaffold on the endogenous repair of alveolar bone...
January 2017: Journal of Biomedical Materials Research. Part A
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