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https://www.readbyqxmd.com/read/28621568/presenting-a-method-to-improve-bone-quality-through-stimulation-of-osteoporotic-mesenchymal-stem-cells-by-low-level-laser-therapy
#1
Mohammad Bayat, Ali Jalalifirouzkouhi
OBJECTIVE: This review aims to present a method to improve bone quality through stimulation of osteoporotic mesenchymal stem cells (MSCs) by low-level laser therapy (LLLT). BACKGROUND: Osteoporosis (OP) is characterized by decreased bone mass and bone strength, which results in an increased incidence of bone fractures. These fractures often lead to additional disability and mortality. Osteoporotic MSCs have reduced osteogenic differentiation when cultured in their standard differentiation media...
June 15, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28609508/evaluation-of-the-bone-regenerating-effects-of-two-anorganic-bovine-bone-grafts-in-a-critical-sized-alveolar-ridge-defect-model
#2
David M Kim, Heather Hong, Jerry Ching-Yi Lin, Myron Nevins
A preclinical trial was conducted to treat 54 mandibular critical-sized alveolar ridge defects in 27 canines. Each hemimandible was randomized to be treated with two different anorganic bovine bone grafts (group A = InterOss [SigmaGraft]; group B = Bio-Oss [Geistlich]) or negative control (group C = empty defect) followed by a 4-, 8-, or 12-week observation period. Microcomputed tomography, histology, histopathology, and histomorphometric analyses were performed to evaluate the safety and efficacy of these treatments...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28595566/a-systemic-review-of-the-sources-of-adult-mesenchymal-stem-cells-and-their-suitability-in-musculoskeletal-applications
#3
Rhiannon Nancarrow-Lei, Pouya Mafi, Reza Mafi, Wasim Khan
Background: Adult mesenchymal stem cells (MSCs) were first isolated from bone marrow by Friedenstein in 1976. These cells were clonogenic, non-haematopoietic, and able to replicate extensively in vitro. The fields of regenerative medicine and tissue engineering have grown dramatically since their inception. In the decades since, MSCs have been identified from mesoderm-, endoderm- and ectoderm-derived tissues. In light of our ageing population, the need for effective cell-based therapies for tissue repair and regeneration is ever-expanding...
June 8, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28548246/comparison-of-three-different-types-of-scaffolds-preseeded-with-human-bone-marrow-mononuclear-cells-on-the-bone-healing-in-a-femoral-critical-size-defect-model-of-the-athymic-rat
#4
Maren Janko, Julian Sahm, Alexander Schaible, Jan C Brune, Marlene Bellen, Katrin Schröder, Caroline Seebach, Ingo Marzi, Dirk Henrich
Large bone defects often pose major difficulties in orthopedic surgery. The application of long term cultured stem cells combined with a scaffold lead to a significant improvement of bone healing in recent experiments but is strongly restricted by EU-law. Bone marrow mononuclear cells (BMC), however, can be isolated and transplanted within few hours and have been proven effective in experimental models of bone healing. The effectivity of the BMC supported therapy might be influenced by the type of scaffold...
May 26, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28538076/regeneration-of-cystic-bone-cavities-and-bone-defects-with-bioactive-glass-s53p4-in-the-upper-and-lower-jaws
#5
Patricia Stoor, Satu Apajalahti, Risto Kontio
Cysts and tumors are common lesions in the jaws. To be able to retain a good volume of the alveolar ridge during healing as well as strengthening the angle and body of the mandible and provide an instant improved support for adjacent teeth, reliable long-term bone regeneration is needed. The purpose of this prospective study was to promote bone regeneration by filling bony defects in the upper or lower jaw with granules of the bioactive glass S53P4 (BAG), which have osteostimulative and antimicrobial properties...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28530130/injectable-graft-substitute-active-on-bone-tissue-regeneration
#6
Michela Bosetti, Alessia Borrone, Massimiliano Leigheb, Prasad Shastri, Mario Cannas
With the aim to obtain an injectable bioactive scaffold that can accelerate bone formation in sinus lift augmentation, in bony void and in fracture repair, we have developed a three-dimensional (3D) jelly collagen containing Lysophosphatidic acid (LPA) and 1α,25-Dihydroxyvitamin D3 (1,25D3). Using an in vitro 3D culture model of bone fracture we show that the contraction of the collagen gel is mediated by Rho-kinase activation in osteoblasts. This contraction was cell concentration dependent and was increased by LPA which favored apposition and fastening of bone fragments approach...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28503966/topical-use-of-dexpanthenol-a-70th-anniversary-article
#7
Ehrhardt Proksch, Raymond de Bony, Sonja Trapp, Stéphanie Boudon
Approximately 70 years ago, the first topical dexpanthenol-containing formulation (Bepanthen™ Ointment) has been developed. Nowadays, various topical dexpanthenol preparations exist, tailored according to individual requirements. Topical dexpanthenol has emerged as frequently used formulation in the field of dermatology and skin care. Various studies confirmed dexpanthenol's moisturizing and skin barrier enhancing potential. It prevents skin irritation, stimulates skin regeneration and promotes wound healing...
May 14, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28485078/tubular-open-porous-%C3%AE-tcp-plcl-scaffolds-as-guiding-structure-for-segmental-bone-defect-regeneration-in-a-novel-sheep-model
#8
Anne-Marie Pobloth, Hanna Schell, Ansgar Petersen, Katleen Beierlein, Christian Kleber, Katharina Schmidt-Bleek, Georg N Duda
Large segmental bone defect reconstruction with sufficient functional restoration is one of the most demanding challenges in orthopedic surgery. Available regenerative treatment options, as the vascularized bone graft transfer, the Masquelet technique or the Ilizarov distraction osteogenesis, are associated with specific indications and distinct limitations. As an alternative, a hollow cylindrical ceramic-polymer composite scaffold (beta-tricalcium phosphate and poly-lactid co-ε- caprolactone), facilitating a strong surface guiding effect for tissue ingrowth (group 1; n = 6) was investigated here...
May 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28467648/building-better-bone-the-weaving-of-biologic-and-engineering-strategies-for-managing-bone-loss
#9
Andrew M Schwartz, Mara L Schenker, Jaimo Ahn, Nick J Willett
Segmental bone loss remains a challenging clinical problem for orthopaedic trauma surgeons. In addition to the missing bone itself, the local tissues (soft tissue, vascular) are often highly traumatized as well, resulting in a less than ideal environment for bone regeneration. As a result, attempts at limb salvage become a highly expensive endeavor, often requiring multiple operations and necessitating the use of every available strategy (autograft, allograft, bone graft substitution, Masquelet, bone transport, etc...
May 3, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28386853/assessment-of-bone-regeneration-of-a-tissue-engineered-bone-complex-using-human-dental-pulp-stem-cells-poly-%C3%AE%C2%B5-caprolactone-biphasic-calcium-phosphate-scaffold-constructs-in-rabbit-calvarial-defects
#10
Natkrita Wongsupa, Thongchai Nuntanaranont, Suttatip Kamolmattayakul, Nuttawut Thuaksuban
The objective of the present study was to investigate the effect of a fabricated combination of poly-ɛ-caprolactone (PCL)-biphasic calcium phosphate (BCP) with the modified melt stretching and multilayer deposition (mMSMD) technique on human dental pulp stem cell (hDPSC) differentiation to be osteogenic like cells for bone regeneration of calvarial defects in rabbit models. hDPSCs extracted from human third molars were seeded onto mMSMD PCL-BCP scaffolds and the osteogenic gene expression was tested prior to implantation in vivo...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28367426/percutaneous-autologous-bone-marrow-derived-mesenchymal-stromal-cell-implantation-is-safe-for-reconstruction-of-human-lower-limb-long-bone-atrophic-nonunion
#11
Mohsen Emadedin, Narges Labibzadeh, Roghayeh Fazeli, Fatemeh Mohseni, Seyedeh Esmat Hosseini, Reza Moghadasali, Soura Mardpour, Vajiheh Azimian, Alireza Goodarzi, Maede Ghorbani Liastani, Ali Mirazimi Bafghi, Mohamadreza Baghaban Eslaminejad, Nasser Aghdami
OBJECTIVE: Nonunion is defined as a minimum of a 9-month period of time since an injury with no visibly progressive signs of healing for 3 months. Recent studies show that application of mesenchymal stromal cells (MSCs) in the laboratory setting is effective for bone regeneration. Animal studies have shown that MSCs can be used to treat nonunions. For the first time in an Iranian population, the present study investigated the safety of MSC implantation to treat human lower limb long bone nonunion...
April 2017: Cell Journal
https://www.readbyqxmd.com/read/28351866/shh-promotes-direct-interactions-between-epidermal-cells-and-osteoblast-progenitors-to-shape-regenerated-zebrafish-bone
#12
Benjamin E Armstrong, Astra Henner, Scott Stewart, Kryn Stankunas
Zebrafish innately regenerate amputated fins by mechanisms that expand and precisely position injury-induced progenitor cells to re-form tissue of the original size and pattern. For example, cell signaling networks direct osteoblast progenitors (pObs) to rebuild thin cylindrical bony rays with a stereotypical branched morphology. Hedgehog/Smoothened (Hh/Smo) signaling has been variably proposed to stimulate overall fin regenerative outgrowth or promote ray branching. Using a photoconvertible patched2 reporter, we resolve active Hh/Smo output to a narrow distal regenerate zone comprising pObs and adjacent motile basal epidermal cells...
April 1, 2017: Development
https://www.readbyqxmd.com/read/28340662/vascularized-small-bone-transfers-for-fracture-nonunion-and-bony-defects
#13
REVIEW
Ai Dong Deng, Marco Innocenti, Rohit Arora, Markus Gabl, Jin Bo Tang
Vascularized small-bone grafting is an efficient and often necessary surgical approach for nonunion or necrosis of several bones in particular sites of the body, including scaphoid, lunate, distal ulna, and clavicle. The medial femoral condyle is an excellent graft source that can be used in treating scaphoid, ulna, clavicle, or lower-extremity bone defects, including nonunion. Vascularized bone grafting to the small bones, particularly involving reconstruction of damaged cartilage surfaces, should enhance subchondral vascular supply and help prevent cartilage regeneration...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28330754/injectable-nanoparticles-hydrogels-composite-as-sustained-release-system-with-stromal-cell-derived-factor-1%C3%AE-for-calvarial-bone-regeneration
#14
Lei Mi, Huaiqin Liu, Yu Gao, Hui Miao, Jianping Ruan
Repair of craniofacial bony defects remains a challenge for surgeons due to the delicate and complex anatomy of the craniofacial skeleton. Stromal cell-derived factor-1α (SDF-1α) is an important chemokine which plays a critical role in the homing of mesenchymal stem cells (MSC), while, the shortcomings including short half-life and easy degradation by enzymes made it in relatively low efficacy. In this work, SDF-1α/chitosan/carboxymeymethy-chitosan nanoparticles (SDF-1α/CS/CMCS NPs) were prepared and characterized for various parameters including morphology, particle size, zeta potential, loading efficiency and the release characteristics from thermosensitive chitosan/β-glycerol phosphate disodium salt (CS/GP) hydrogels...
August 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28293171/the-role-of-semaphorin-3a-in-bone-remodeling
#15
REVIEW
Zhenxia Li, Jin Hao, Xin Duan, Nan Wu, Zongke Zhou, Fan Yang, Juan Li, Zhihe Zhao, Shishu Huang
Bone remodeling occurs at the bone surface throughout adult life and associates bony quantity and quality. This process is a balance between the osteoblastic bone formation and osteoclastic bone resorption, which cross-talks together. Semaphorin 3A is a membrane-associated secreted protein and regarded as a diffusible axonal chemorepellent, which has been identified in the involvement of bone resorption and formation synchronously. However, the role of Semaphorin 3A in bone homeostasis and diseases remains elusive, in particular the association to osteoblasts and osteoclasts...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28286396/reconstruction-of-a-post-traumatic-anterior-maxillary-defect-by-transport-distraction-osteogenesis
#16
K Rajkumar, R S Neelakandan, Pradeep Devadoss, T K Bandyopadhyay
Rehabilitation of segmental defects of maxilla presents a reconstructive challenge to obtain an ideal osseous form and height with adequate soft tissue investment. Though variety of prosthetic and surgical reconstructive options like the use of vascularized and non vascularized bone grafts are available they produce less than optimal results. Bone transport distraction is a reliable procedure in various maxillofacial bony defect reconstruction techniques. We describe herein a technique of maxillary bone transport distraction using an indigenously designed, custom made trifocal transport distractor performed in a post traumatic avulsive defect of the anterior maxilla...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28274048/evaluation-of-cyclosporine-a-with-%C3%AE-tcp-in-the-treatment-of-human-infra-bony-defects-a-randomized-controlled-pilot-study
#17
Jyotsna Amalakara, Krishnajaneya Reddy, Haritha Avula, Ashank Mishra, Butchibabu Kalakonda, Ruchi Pandey
INTRODUCTION: Cyclosporine A (CsA), an immunosuppressant, is considered a life saver drug in organ transplant cases. It has also been tested in animal and human studies for periodontal applications as it selectively inhibits T lymphocyte proliferation, Interleukin-2 (IL-2) and other cytokine production, without any effect on T suppressor cells, thereby suppressing the cell mediated immunity and suppressing the inflammation. Inflammatory and immunological responses have been found to be decreased and bone formation is found to be increased in immunosuppressed animals...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28263667/one-step-treatment-for-patellar-cartilage-defects-with-a-cell-free-osteochondral-scaffold-a-prospective-clinical-and-mri-evaluation
#18
Francesco Perdisa, Giuseppe Filardo, Andrea Sessa, Maurizio Busacca, Stefano Zaffagnini, Maurilio Marcacci, Elizaveta Kon
BACKGROUND: The treatment of symptomatic cartilage defects of the patella is particularly challenging, and no gold standard is currently available. PURPOSE: To evaluate the clinical results of a biphasic cell-free collagen-hydroxyapatite scaffold and to evaluate osteochondral tissue regeneration with magnetic resonance imaging (MRI). STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Thirty-four patients (18 men and 16 women; mean ± SD: age, 30...
June 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28261424/healing-process-of-osteonecrotic-lesions-of-the-femoral-head-following-transtrochanteric-rotational-osteotomy-a-computed-tomography-based-study
#19
Devendra Lakhotia, Siva Swaminathan, Won Yong Shon, Jong Keon Oh, Jun Gyu Moon, Chirayu Dwivedi, Suk Joo Hong
BACKGROUND: Transtrochanteric rotational osteotomy (TRO) is a controversial hip-preserving procedure with a variable success rate. The healing process of femoral head osteonecrosis after TRO has been poorly explained till now. This study aimed to evaluate the healing process of previously transposed necrotic lesion after a TRO for nontraumatic osteonecrosis of the femoral head using computed tomography (CT). METHODS: Among 52 patients (58 hips) who had preserved original femoral head after TRO, we retrospectively reviewed 27 patients (28 hips) who had undergone sequential CT scans and had no major complication following TRO...
March 2017: Clinics in Orthopedic Surgery
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
#20
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
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