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Bone Demineralization

Po-Hui Lee, Tu-Lai Yew, Yu-Lin Lai, Shyh-Yuan Lee, Hen-Li Chen
BACKGROUND: Gene-activated matrix (GAM) induces sustained local production of growth factors to promote tissue regeneration. GAM contains a plasmid DNA (pDNA) encoding target proteins that is physically entrapped within a biodegradable matrix carrier. GAM with a pDNA encoding the first 34 amino acids of parathyroid hormone (PTH 1-34) and a collagen matrix enhances bone regeneration in long bone defects. Demineralized freeze-dried bone allograft (DFDBA) is a widely used osteoinductive bone graft...
March 15, 2018: Journal of the Chinese Medical Association: JCMA
John D Koerner, Dessislava Z Markova, Greg D Schroeder, Brian P Calio, Anuj Shah, Corbin W Brooks, Alexander R Vaccaro, D Greg Anderson, Chris K Kepler
BACKGROUND CONTEXT: The systemic response regarding cytokine expression after application of recombinant human Bone Morphogenetic Protein-2 (rhBMP-2) in a rat spinal fusion model has recently been defined1 , but the local response has not. Defining the local cytokine and growth factor response at the fusion site will help explain the roles of these molecules in the fusion process, as well as that of rhBMP-2. Our hypothesis is that application of rhBMP-2 to the fusion site will alter the local levels of cytokines and growth factors throughout the fusion process, in a manner that is different than the systemic response given the tissue-specific effects of rhBMP-2...
March 14, 2018: Spine Journal: Official Journal of the North American Spine Society
S C Ibeneme, C Ekanem, A Ezuma, N Iloanusi, N N Lasebikan, O A Lasebikan, O E Oboh
BACKGROUND: Depletion of ovarian hormone in postmenopausal women has been associated with changes in the locomotor apparatus that may compromise walking function including muscle atrophy/weakness, weight gain, and bone demineralization. Therefore, handgrip strength (HGS), bone mineral density (BMD) and body composition [percentage body fat mass (%BFM), fat mass (FM), Fat-free mass (FFM) and body mass index (BMI)], may significantly vary and predict WB in postmenopausal women. Consequently, the study sought to 1...
March 15, 2018: BMC Musculoskeletal Disorders
Thanyaporn Kangwannaronkul, Keskanya Subbalekha, Philaiporn Vivatbutsiri, Jaijam Suwanwela
PURPOSE: Bio-Oss and demineralized freeze-dried bone allograft (DFDBA) are two commercial bone grafts that have been associated with clinical success for many years. However, there are few in vivo studies regarding their healing mechanism. The purpose of this study was to investigate the level of bone formation using microcomputed tomography (micro-CT) and gene expression in mouse calvaria at 1 and 3 months after bone grafting with deproteinized bovine bone and freeze-dried human bone, and compare them to natural bone healing...
March 15, 2018: International Journal of Oral & Maxillofacial Implants
Petra Korlević, Sahra Talamo, Matthias Meyer
Current protocols for ancient DNA and radiocarbon analysis of ancient bones and teeth call for multiple destructive samplings of a given specimen, thereby increasing the extent of undesirable damage to precious archaeological material. Here we present a method that makes it possible to obtain both ancient DNA sequences and radiocarbon dates from the same sample material. This is achieved by releasing DNA from the bone matrix through incubation with either EDTA or phosphate buffer prior to complete demineralization and collagen extraction utilizing the acid-base-acid-gelatinization and ultrafiltration procedure established in most radiocarbon dating laboratories...
March 7, 2018: Scientific Reports
M Sauvan, N Chabbert-Buffet, M Canis, P Collinet, X Fritel, S Geoffron, G Legendre, J-M Wattier, H Fernandez
OBJECTIVE: To provide clinical practice guidelines for the management of painful endometriosis in women without infertility. METHODS: Systematic review of the literature literature since 2006, level of evidence rating, external proofreading and grading of the recommendation grade by an expert group according to HAS methodology. RESULTS: Combined hormonal contraceptives (COP) and the levonorgestrel-releasing intra-uterin system (LNG-IUS) are recommended as first-line hormonal therapies for the treatment of painful endometriosis (grade B)...
March 3, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
Jakob M Townsend, Brian T Andrews, Yi Feng, Jinxi Wang, Randolph J Nudo, Erik Van Kampen, Stevin H Gehrke, Cory J Berkland, Michael S Detamore
Traumatic brain injury (TBI) is a life-threatening condition defined by internal brain herniation. Severe TBI is commonly treated by a two-stage surgical intervention, where decompressive craniectomy is first conducted to remove a large portion of calvarial bone and allow unimpeded brain swelling. In the second surgery, spaced weeks to months after the first, cranioplasty is performed to restore the cranial bone. Hydrogels with paste-like precursor solutions for surgical placement may potentially revolutionize TBI treatment by permitting a single-stage surgical intervention, capable of being implanted with the initial surgery, remaining pliable during brain swelling, and tuned to regenerate calvarial bone after brain swelling has subsided...
February 26, 2018: Acta Biomaterialia
Hengameh Khosropanah, Nazila Lashkarizadeh, Maryam Ayatollahi, Maryam Kaviani, Zohreh Mostafavipour
Statement of the Problem: A great challenge in periodontal therapy is the regeneration enhancement of osseous defects through applying osteoinductive materials. Demineralized freeze-dried bone allograft (DFDBA) has already been introduced as an allograft with osteoconductive and variable osteoinductive properties. Calcium hydroxide [Ca(OH)2 ] is an available well-known material in dentistry, which induces hard tissue formation. Purpose: This study evaluated the efficiency of combination of DFDBA and Ca(OH)2 in improving the quality of osteoinduction of DFDBA...
March 2018: Journal of Dentistry
Ehab Shiban, Moritz Nies, Johann Kogler, Lorenz Kogler, Pedro Ribeiro da Cunha, Bernhard Meyer, Jens Lehmberg
AIM: To correlate clinical and radiological outcome following one- and two-level anterior cervical discectomy and fusion (ACDF) with stand-alone polyetheretherketone (PEEK) cages filled with demineralized bone matrix (DBM). METHODS: We performed a retrospective review of a consecutive patient cohort with degenerative disc disease that underwent ACDF with stand-alone PEEK cages filled with demineralized bone matrix (DBM) between 2010 and 2013 with a minimum follow-up of 12 months...
February 26, 2018: Acta Neurochirurgica
Yung-Ching Chien, Jinhui Tao, Kuniko Saeki, Alexander F Chin, Jolene L Lau, Chun-Long Chen, Ronald N Zuckermann, Sally J Marshall, Grayson W Marshall, James J De Yoreo
In calcified tissues such as bones and teeth, mineralization is regulated by an extracellular matrix, which includes non-collagenous proteins (NCP). This natural process has been adapted or mimicked to restore tissues following physical damage or demineralization by using polyanionic acids in place of NCPs, but the remineralized tissues fail to fully recover their mechanical properties. Here we show that pre-treatment with certain amphiphilic peptoids, a class of peptide-like polymers consisting of N-substituted glycines that have defined monomer sequences, enhances ordering and mineralization of collagen and induces functional remineralization of dentin lesions in vitro ...
December 11, 2017: ACS Biomaterials Science & Engineering
Fan Liang, Hyuma Leland, Breanna Jedrzejewski, Allyn Auslander, Seija Maniskas, Jordan Swanson, Mark Urata, Jeffrey Hammoudeh, William Magee
Alveolar cleft reconstruction has historically relied on autologous iliac crest bone grafting (ICBG), but donor site morbidity, pain, and prolonged hospitalization have prompted the search for bone graft substitutes. The authors evaluated bone graft substitutes with the highest levels of evidence, and highlight the products that show promise in alveolar cleft repair and in maxillary augmentation. This comprehensive review guides the craniofacial surgeon toward safe and informed utilization of biomaterials in the alveolar cleft...
February 14, 2018: Journal of Craniofacial Surgery
Lauren M Baugh, Zhiyi Liu, Kyle P Quinn, Sam Osseiran, Conor L Evans, Gordon S Huggins, Philip W Hinds, Lauren D Black, Irene Georgakoudi
Calcifications occur during the development of healthy bone, and at the onset of calcific aortic-valve disease (CAVD) and many other pathologies. Although the mechanisms regulating early calcium deposition are not fully understood, they may provide targets for new treatments and for early interventions. Here, we show that two-photon excited fluorescence (TPEF) can provide quantitative and sensitive readouts of calcific nodule formation, in particular in the context of CAVD. Specifically, by means of the decomposition of TPEF spectral images from excised human CAVD valves and from rat bone prior to and following demineralization, as well as from calcific nodules formed within engineered gels, we identified an endogenous fluorophore that correlates with the level of mineralization in the samples...
November 2017: Nature Biomedical Engineering
Jose Antonio, Anya Ellerbroek, Cassandra Evans, Tobin Silver, Corey A Peacock
Background: It has been posited that the consumption of extra protein (> 0.8 g/kg/d) may be deleterious to bone mineral content. However, there is no direct evidence to show that consuming a high-protein diet results in a demineralization of the skeleton. Thus, the primary endpoint of this randomized controlled trial was to determine if a high-protein diet affected various parameters of whole body and lumbar bone mineral content in exercise-trained women. Methods: Twenty-four women volunteered for this 6-month investigation ( n  = 12 control, n = 12 high-protein)...
2018: Journal of the International Society of Sports Nutrition
Agian Jeffilano Barinda, Koji Ikeda, Ken-Ichi Hirata, Noriaki Emoto
Vascular calcification is an important risk factor for cardiovascular disease, and is closely associated with all-cause mortality. Recently, it has been revealed that vascular calcification is not a passive precipitation of circulating minerals, but is a process actively regulated through machinery similar to bone formation. During the bone remodeling, osteoclasts execute the bone resorption by releasing hydrogen ions to dissolve minerals; however, molecular mechanisms underlying decalcification of ectopically calcified lesions remain largely unknown...
October 16, 2017: Kobe Journal of Medical Sciences
Bashar Reda, Catherine Coady, Ivan Wong
A revision rotator cuff repair is a technically challenging surgical procedure. This can be further complicated by the presence of poor quality of the cuff tissue, as well as a large greater tuberosity cyst, typically located at the rotator cuff footprint. This Technical Note discusses the surgical approach to deal with a revision rotator cuff tear with a large humeral head cyst. This described arthroscopic technique is performed in a single-stage procedure using a human dermal allograft (GraftJacket) for augmentation...
October 2017: Arthroscopy Techniques
Qiao Zhang, Dai Jing, Yufeng Zhang, Richard J Miron
PURPOSE: Bone grafting materials are frequently utilized in oral surgery and periodontology to fill bone defects and augment lost or missing bone. The purpose of this study was to compare new bone formation in bone defects created in both normal and osteoporotic animals loaded with three types of bone grafts from different origins. MATERIALS AND METHODS: Forty-eight female Wistar rats were equally divided into control normal and ovariectomized animals. Bilateral 2...
February 8, 2018: International Journal of Oral & Maxillofacial Implants
Corinne J Thomas, Timothy P Cleland, Grazyna E Sroga, Deepak Vashishth
Advanced glycation end-products (AGEs) are a category of post translational modification associated with the degradation of the structural properties of multiple different types of tissues. Typically, AGEs are the result of a series of post-translational modification reactions between sugars and proteins through a process known as non-enzymatic glycation (NEG). Increases in the rate of NEG of bone tissue are associated with type 2 diabetes and skeletal fragility. Current methods of assessing NEG and its impact on bone fracture risk involve measurement of pentosidine or total fluorescent AGEs (fAGEs)...
February 1, 2018: Bone
Virendra Kumar, Jaya Dixit, Nand Lal, Umesh Pratap Verma, Puja Debnath, Anjani Kumar Pathak
Background: The purpose of the present study was to envisage the effectiveness of demineralized freeze-dried bone allograft (DFDBA) and bovine bone graft (BBG) for promoting defect fill in periodontal intrabony defects using dentascan. Materials and Methods: A total of 13 subjects (15 intrabony defects) aged between 24 and 56 years affected by moderate to severe periodontitis were randomly divided into Control (CG) and Test groups (TG1 and TG2). In CG only debridement, TG1 debridement plus DFDBA, and TG2 debridement plus BBG were performed...
July 2017: National Journal of Maxillofacial Surgery
Kivovics Márton, Szabó Bence Tamás, Németh Orsolya, Czinkóczky Béla, Dőri Ferenc, Nagy Péter, Dobó-Nagy Csaba, Csönge Lajos, Lacza Zsombor, Mijiritsky Eitan, Szabó György
Serum albumin has been identified as an endogenous protein that is integral to early bone regeneration. We hypothesized that albumin addition to allografts may result in better bone remodeling than what can be achieved with anorganic xenografts. Sinus elevations were performed at 32 sites of 18 patients with the lateral window technique. Sites either received filling with an anorganic bovine bone mineral (ABBM, BioOss, Geistlich, CH) or albumin impregnated allograft (BoneAlbumin, OrthoSera, AT). After 6-months patients received dental implants and 16 bone core biopsy samples were obtained from the ABBM filled, and 16 from the BoneAlbumin augmented sites...
January 28, 2018: Materials
Pâmella Coelho Dias, Pedro Henrique Justino Oliveira Limirio, Camila Rodrigues Borges Linhares, Mariana Lobo Bergamini, Flaviana Soares Rocha, Richarlisson Borges de Morais, Ana Paula Coelho Balbi, Karen Renata Nakamura Hiraki, Paula Dechichi
PURPOSE: The aim of this study was evaluate the effect of HBO on diabetic rats. MATERIALS AND METHODS: Twenty rats were distributed into four groups (n = 5): Control (C); Control + HBO (CH); Diabetes (D) and Diabetes + HBO (DH). Diabetes was induced by streptozotocin, and bone defects were created in both femurs in all animals. HBO therapy began immediately after surgery and was performed daily in the CH and DH groups. After 7 days, the animals were euthanized...
January 29, 2018: Connective Tissue Research
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