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Journal of Dental Research

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https://www.readbyqxmd.com/read/28346861/biomimetic-remineralization-of-carious-lesions-by-self-assembling-peptide
#1
L Kind, S Stevanovic, S Wuttig, S Wimberger, J Hofer, B Müller, U Pieles
Caries is the most common disease in the world. Great efforts have been undertaken for prevention and to identify a regenerative treatment solution for dental caries. Self-assembling β-sheet forming peptides have previously shown to form 3-dimensional fiber networks supporting tissue regeneration. In particular, the self-assembling peptide P11-4 has shown potential in the treatment and prevention of dental caries. It has previously been shown that application of monomeric P11-4 solution to early carious lesions can increase net mineral gain by forming de novo hydroxyapatite crystals...
March 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28208029/l1-peptide-conjugated-fibrin-hydrogels-promote-salivary-gland-regeneration
#2
K Nam, C-S Wang, C L M Maruyama, P Lei, S T Andreadis, O J Baker
Hyposalivation contributes to dental caries, periodontitis, and microbial infections. Additionally, it impairs activities of daily living (e.g., speaking, chewing, and swallowing). Treatments for hyposalivation are currently limited to medications (e.g., the muscarinic receptor agonists pilocarpine and cevimeline) that induce saliva secretion from residual acinar cells and the use of saliva substitutes. However, given that these therapies provide only temporary relief, the development of alternative treatments to restore gland function is essential...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28208026/corrigendum
#3
(no author information available yet)
Jamieson LM, Elani HW, Mejia GC, Ju X, Kawachi I, Harper S, Thomson WM, Kaufman JS. 2016. Inequalities in indigenous oral health: findings from Australia, New Zealand, and Canada. J Dent Res. 95(12):1375-1380. (Original DOI: 10.1177/0022034516658233 ).
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28199142/dc-stamp-is-an-osteoclast-fusogen-engaged-in-periodontal-bone-resorption
#4
W Wisitrasameewong, M Kajiya, A Movila, S Rittling, T Ishii, M Suzuki, S Matsuda, Y Mazda, M R Torruella, M M Azuma, K Egashira, M O Freire, H Sasaki, C Y Wang, X Han, M A Taubman, T Kawai
Dendritic cell-specific transmembrane protein (DC-STAMP) plays a key role in the induction of osteoclast (OC) cell fusion, as well as DC-mediated immune regulation. While DC-STAMP gene expression is upregulated in the gingival tissue with periodontitis, its pathophysiological roles in periodontitis remain unclear. To evaluate the effects of DC-STAMP in periodontitis, anti-DC-STAMP-monoclonal antibody (mAb) was tested in a mouse model of ligature-induced periodontitis ( n = 6-7/group) where Pasteurella pneumotropica ( Pp)-reactive immune response activated T cells to produce receptor activator of nuclear factor kappa-B ligand (RANKL), which, in turn, promotes the periodontal bone loss via upregulation of osteoclastogenesis...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28199140/role-of-bone-marrow-stromal-cells-in-impaired-bone-repair-from-bronj-osseous-lesions
#5
L H He, E Xiao, J G An, Y He, S Chen, L Zhao, T Zhang, Y Zhang
Treatment of bisphosphonate-related osteonecrosis of the jaw (BRONJ) has posed significant challenges to maxillofacial surgeons because of the poor repair of BRONJ bone defects. Moreover, the pathological mechanisms remain unclear. Bone marrow stromal cells (BMSCs) play key roles during bone repair and bone regeneration. However, the activities of BMSCs derived from BRONJ lesions and the BRONJ lesion boundary, as well as the roles of BMSCs in BRONJ defect repair, are poorly defined. In this study, we found that BMSCs from the central area of the osteonecrotic BRONJ region (center-BRONJ BMSCs) and the peripheral area at the recommended debridement boundary (peri-BRONJ BMSCs) had decreased proliferative ability, self-renewal capacity, and multidifferentiation capacities compared with control BMSCs...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28196330/decellularized-human-dental-pulp-as-a-scaffold-for-regenerative-endodontics
#6
J S Song, K Takimoto, M Jeon, J Vadakekalam, N B Ruparel, A Diogenes
Teeth undergo postnatal organogenesis relatively late in life and only complete full maturation a few years after the crown first erupts in the oral cavity. At this stage, development can be arrested if the tooth organ is damaged by either trauma or caries. Regenerative endodontic procedures (REPs) are a treatment alternative to conventional root canal treatment for immature teeth. These procedures rely on the transfer of apically positioned stem cells, including stem cells of the apical papilla (SCAP), into the root canal system...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28195749/restorative-thresholds-for-carious-lesions
#7
N P T Innes, F Schwendicke
Current evidence supports noninvasive/nonrestorative treatment of "early" carious lesions: those confined to enamel or reaching the enamel-dentin junction. The extent that dentists' thresholds for intervening restoratively have changed with this evidence is unknown. This systematic review aimed to determine dentists' and therapists' current lesion threshold for carrying our restorative interventions in adults/children and primary/permanent teeth. Embase, Medline via PubMed, and Web of Science were searched for observational studies, without language, time, or quality restrictions...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28182862/proanthocyanidins-loaded-nanoparticles-enhance-dentin-degradation-resistance
#8
A S Fawzy, B M Priyadarshini, S T Selvan, T B Lu, J Neo
Previous studies reported that grapeseed extract (GSE), which is rich in proanthocyanidins (PAs), improves the biodegradation resistance of demineralized dentin. This study aimed to investigate the effect of a new GSE delivery strategy to demineralized dentin through loading into biodegradable polymer poly-[lactic-co-glycolic acid] (PLGA) nanoparticles on the biodegradation resistance in terms of structural stability and surface/bulk mechanical and biochemical properties with storage time in collagenase-containing solutions...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28182517/rapid-chair-side-test-for-detection-of-porphyromonas-gingivalis
#9
N M O'Brien-Simpson, K Burgess, J C Lenzo, G C Brammar, I B Darby, E C Reynolds
Porphyromonas gingivalis is a keystone pathogen of chronic periodontitis, and its intraoral levels have been shown to predict disease progression (activity). An accurate and sensitive chair-side (point of care) test to determine disease activity is critical for early intervention and clinical management of disease. This study aimed to develop a rapid, chair-side, saliva-based detection of P. gingivalis. Monoclonal antibodies (mAbs) to the A1-adhesin domain of the P. gingivalis RgpA-Kgp proteinase-adhesin complex were screened by enzyme-linked immunosorbent assay and microbial flow cytometry, with 2 mAbs shown to recognize all laboratory and clinical strains tested, without significantly cross-reacting with other oral bacteria tested...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28170285/fgf-signaling-prevents-the-terminal-differentiation-of-odontoblasts
#10
K Sagomonyants, I Kalajzic, P Maye, M Mina
Members of the fibroblast growth factor (FGF) family play essential and important roles in primary and reparative dentinogenesis, with conflicting results regarding their effects on odontoblast differentiation. Our recent studies showed that the effects of FGF2 on cells in odontoblast lineage were stage-specific and depended on the stage of cell maturity. Continuous exposure of pulp cells to FGF2 inhibited odontoblast differentiation, whereas early and limited exposure of pulp cells to FGF2 resulted in marked increases in odontoblast differentiation...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28165889/force-induced-h2s-by-pdlscs-modifies-osteoclastic-activity-during-tooth-movement
#11
F Liu, F Wen, D He, D Liu, R Yang, X Wang, Y Yan, Y Liu, X Kou, Y Zhou
Hydrogen sulfide (H2S), a gasotransmitter, has been recently linked to mesenchymal stem cell (MSC) function and bone homeostasis. Periodontal ligament stem cells (PDLSCs) are the main MSCs in PDL, which respond to mechanical force to induce physiological activities during orthodontic tooth movement (OTM). However, it is unknown whether mechanical force might induce endogenous H2S production by PDLSCs to regulate alveolar bone homeostasis. Here, we used a mouse OTM model to demonstrate that orthodontic force-induced endogenous H2S production in PDL tissue was associated with macrophage accumulation and osteoclastic activity in alveolar bone...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28165872/nampt-is-an-essential-regulator-of-ra-mediated-periodontal-inflammation
#12
D Kim, G Lee, Y H Huh, S Y Lee, K H Park, S Kim, J Kim, J Koh, J Ryu
Recent studies have indicated a potential correlation between rheumatoid arthritis (RA) and periodontal inflammation. We undertook this study to verify whether RA mediates periodontitis-like phenotypes in experimental mouse models of RA and to explore the role of nicotinamide phosphoribosyltransferase (NAMPT) in periodontal inflammation during RA pathogenesis. Periodontal inflammation and alveolar bone loss have been reported in mice with collagen-induced arthritis (CIA) and in genetically modified tumor necrosis factor-α (TNF-α) transgenic (TG) mouse models...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28141971/paracrine-maturation-and-migration-of-sh-sy5y-cells-by-dental-pulp-stem-cells
#13
P Gervois, E Wolfs, Y Dillen, P Hilkens, J Ratajczak, R B Driesen, T Vangansewinkel, A Bronckaers, B Brône, T Struys, I Lambrichts
Neurological disorders are characterized by neurodegeneration and/or loss of neuronal function, which cannot be adequately repaired by the host. Therefore, there is need for novel treatment options such as cell-based therapies that aim to salvage or reconstitute the lost tissue or that stimulate host repair. The present study aimed to evaluate the paracrine effects of human dental pulp stem cells (hDPSCs) on the migration and neural maturation of human SH-SY5Y neuroblastoma cells. The hDPSC secretome had a significant chemoattractive effect on SH-SY5Y cells as shown by a transwell assay...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28118553/endothelial-tight-junctions-are-opened-in-cholinergic-evoked-salivation-in-vivo
#14
X Cong, Y Zhang, Q H He, T Wei, X M Zhang, J Z Zhang, R L Xiang, G Y Yu, L L Wu
Blood vessels provide the original supplies for the formation of primary saliva, which is regulated by the tight junctions (TJs) between endothelial cells. Previous studies have shown that blood flow increases with vasodilatation during cholinergic-evoked salivation. However, changes in vascular paracellular permeability and the role of endothelial TJs in salivation are unknown. Here, we established an in vivo paracellular permeability detection system and observed that the endothelial TJs were permeable to 4-kDa fluorescein isothiocyanate (FITC)-dextran while impermeable to 40- and 70-kDa FITC-dextran under an unstimulated condition in mouse submandibular glands (SMGs)...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28118552/decellularized-tooth-bud-scaffolds-for-tooth-regeneration
#15
W Zhang, B Vazquez, D Oreadi, P C Yelick
Whole tooth regeneration approaches currently are limited by our inability to bioengineer full-sized, living replacement teeth. Recently, decellularized organ scaffolds have shown promise for applications in regenerative medicine by providing a natural extracellular matrix environment that promotes cell attachment and tissue-specific differentiation leading to full-sized organ regeneration. We hypothesize that decellularized tooth buds (dTBs) created from unerupted porcine tooth buds (TBs) can be used to guide reseeded dental cell differentiation to form whole bioengineered teeth, thereby providing a potential off-the-shelf scaffold for whole tooth regeneration...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28113034/biomimetic-enamel-regeneration-mediated-by-leucine-rich-amelogenin-peptide
#16
S Y Kwak, A Litman, H C Margolis, Y Yamakoshi, J P Simmer
We report here a novel biomimetic approach to the regeneration of human enamel. The approach combines the use of inorganic pyrophosphate (PPi) to control the onset and rate of enamel regeneration and the use of leucine-rich amelogenin peptide (LRAP), a nonphosphorylated 56-amino acid alternative splice product of amelogenin, to regulate the shape and orientation of growing enamel crystals. This study builds on our previous findings that show LRAP can effectively guide the formation of ordered arrays of needle-like hydroxyapatite (HA) crystals in vitro and on the known role mineralization inhibitors, like PPi, play in the regulation of mineralized tissue formation...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28113000/impact-of-obesity-on-orthodontic-tooth-movement-in-adolescents
#17
H F Saloom, S N Papageorgiou, G H Carpenter, M T Cobourne
Obesity is a widespread chronic inflammatory disorder characterized by an increased overall disease burden and significant association with periodontitis. The aim of this prospective clinical cohort study was to investigate the effect of obesity on orthodontic tooth movement. Fifty-five adolescent patients (27 males, 28 females) with a mean (SD) age of 15.1 (1.7) years and mean (SD) body mass index (BMI) of 30.2 (3.5) kg/m(2) in obese and 19.4 (2.2) kg/m(2) in normal-weight groups were followed from start of treatment to completion of tooth alignment with fixed orthodontic appliances...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28107638/memoriam-on-the-life-of-dr-william-bowen
#18
J Clarkson, H Koo, J E Melvin, L A Tabak
No abstract text is available yet for this article.
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28107637/survival-predictions-of-ceramic-crowns-using-statistical-fracture-mechanics
#19
S Nasrin, N Katsube, R R Seghi, S I Rokhlin
This work establishes a survival probability methodology for interface-initiated fatigue failures of monolithic ceramic crowns under simulated masticatory loading. A complete 3-dimensional (3D) finite element analysis model of a minimally reduced molar crown was developed using commercially available hardware and software. Estimates of material surface flaw distributions and fatigue parameters for 3 reinforced glass-ceramics (fluormica [FM], leucite [LR], and lithium disilicate [LD]) and a dense sintered yttrium-stabilized zirconia (YZ) were obtained from the literature and incorporated into the model...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28095728/dental-prophylaxis-and-osteoradionecrosis
#20
C T Chang, S P Liu, C H Muo, C H Tsai, Y F Huang
The aim of this study was to investigate the association of different dental prophylactic modalities and osteoradionecrosis (ORN) and determine the risk of ORN under different timing periods of scaling, with the use chlorhexidine mouth rinse after surgery and with different strategies of fluoride gel application in head and neck cancer (HNC) participants. A cohort of 18,231 HNC participants, including 941 ORN patients and 17,290 matched control cases, were enrolled from a Longitudinal Health Insurance Database for Catastrophic Illness Patients (LHID-CIP) in Taiwan...
January 1, 2017: Journal of Dental Research
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