Abstract:
INTRODUCTION:The ability to resolve pulpal inflammation to achieve predictable regeneration of the dentin-pulp complex has remained elusive and presents a challenge for clinicians and researchers. Although the dentin-pulp complex can react naturally to injury by forming a bridge of reparative dentin that protects the pulp from further damage, this process is significantly impaired if inflammation persists. Because the secretion of inflammatory cytokines by injured pulpal cells causes significant pain and discomfort to patients, it is critical to resolve pulpal inflammation in a timely manner so as to create a microenvironment conducive for pulpal healing and reparative dentin formation. The emergent field of regenerative endodontics has encouraged the development and application of biologically driven therapies that take advantage of the intrinsic healing capacities of host cells within dental pulp and the periapical complex. METHODS:These studies were designed to test the hypothesis that exposure to hypoxic conditions can modulate the production of inflammatory cytokines/factors by mesenchymal cells in vitro. A multi-domain peptide hydrogel system that is highly conducive for the growth and differentiation of tooth-derived stem cells was used for these studies. Stem cells from human exfoliated deciduous teeth (SHEDs) were first cultured within 3-dimensional hydrogel constructs and then challenged with hypoxic stresses via addition of H2O2. RESULTS:MDP constructs were successfully generated, challenged with H2O2, decellularized and lyophilized, forming a potential biomaterial containing hypoxia induced repair molecules. The ability of cell-derived factors to convert the phenotype of lipopolysaccharide-primed macrophages from a proinflammatory to a pro-resolving state was examined in the presence of the lyophilized SHED cell constructs. CONCLUSIONS:Our data suggest that hypoxia induced SHED cell products can be captured within the hydrogel system and may be useful in the resolution of pulpal inflammation to create a favorable microenvironment for regeneration of the dentin-pulp complex.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Colombo JS,Jia S,D'Souza RNdoi
10.1016/j.joen.2020.06.039subject
Has Abstractpub_date
2020-09-01 00:00:00pages
S19-S25issue
9Seissn
0099-2399issn
1878-3554pii
S0099-2399(20)30450-7journal_volume
46pub_type
杂志文章abstract::Retrograde (or apical/periapical) peri-implantitis (RPI) presents with radiographic signs of bone loss at the periapical area of endosteal implants and may also present with clinical signs of abscess formation or a sinus tract traceable to the implant periapex. The lesion may form days up to several years after the in...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.01.002
更新日期:2019-05-01 00:00:00
abstract::The complexity of restorative dentistry has increased greatly in recent years, with the myriad of products used in "adhesive dentistry." So too has the "simple" matter of restoring access cavities after completion of endodontic treatment. This review discusses current methods of "bonding" to tooth structure, ceramic m...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1097/01.don.0000155222.49442.a1
更新日期:2005-03-01 00:00:00
abstract::Inflammation in the dental pulp is accompanied by release of a wide variety of highly oxidative molecules known as reactive oxygen species (ROS). ROS concentrations are controlled in vivo by an antioxidant enzyme scavenger system that may be overwhelmed by the increases in ROS production seen during inflammation. Supp...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200103000-00014
更新日期:2001-03-01 00:00:00
abstract::Gutta-percha (GP) has been the most widely used root canal filling material because of its well-known low toxicity. The inertness of GP, however, was challenged recently. The purpose of this study was to evaluate the toxicity of marketed endodontic GP using the radiochromium release test. Fourteen commercially availab...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(06)81885-6
更新日期:1990-09-01 00:00:00
abstract:INTRODUCTION:Nonequilibrium plasma has been reported to effectively kill Enterococcus faecalis in endodontic biofilm compared with chlorhexidine digluconate (CHX). The purpose of this study was to evaluate the antimicrobial in vitro activity of modified nonequilibrium plasma with CHX against E. faecalis and multispecie...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.06.027
更新日期:2013-11-01 00:00:00
abstract::Occlusal endodontic access preparations are occasionally made in teeth without removing the original restoration. However, microleakage between restorative materials that are placed at different times has not been extensively studied. Therefore, our objective was to compare microleakage at three areas: between an acce...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(99)80278-7
更新日期:1999-06-01 00:00:00
abstract::This study compared the cytotoxicity of MetaSEAL (Parkell Inc, Farmington, NY), a methacrylate resin-based sealer with an epoxy resin-based (AH Plus Jet; Dentsply Caulk, Milford, DE) and a zinc oxide-eugenol-based sealer (Pulp Canal Sealer; SybronEndo, Orange, CA). Five-millimeter diameter disks prepared from the resp...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.06.020
更新日期:2008-09-01 00:00:00
abstract:INTRODUCTION:Several bioactive bioceramics with osteoconductive effects can inhibit osteoclast formation and bone resorption in vitro, but the exact underlying mechanism has not been fully elucidated. Bioaggregate (BA), a novel calcium silicate nanoparticulate bioceramic, significantly induces bone and periodontal rege...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2015.05.018
更新日期:2015-09-01 00:00:00
abstract::In this study, we examined the effects of TNF-alpha on Bone morphogenetic protein (BMP-2), Smads (which play intracellular signaling of BMPs) expression and alkaline phosphatase (ALP) activity of human dental pulp (HDP) cells to clarify the mechanism of tertiary dentin formation. The quantity of RT-PCR product for BMP...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2005.12.007
更新日期:2006-06-01 00:00:00
abstract::The purpose of this study was to compare the degree of anesthesia obtained with 2% lidocaine with three different concentrations of epinephrine for inferior alveolar nerve block. Using a repeated measures design, 30 subjects randomly received an inferior alveolar injection using masked cartridges of each solution at t...
journal_title:Journal of endodontics
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/S0099-2399(97)80271-3
更新日期:1997-03-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to evaluate the radiopacity of calcium aluminate cement (EndoBinder) with 3 different radiopacifiers (bismuth oxide, zinc oxide, or zirconium oxide) in comparison with gray mineral trioxide aggregate (GMTA), white MTA, and dental structures (enamel and dentin). METHODS:Eighteen t...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2010.10.001
更新日期:2011-01-01 00:00:00
abstract::When dentin is planed by endodontic instruments, a smear layer forms. Whether this layer should be removed is unknown and controversial. This study was conducted to assess the effect of the smear layer on retention of bacteria using an in vitro root canal bacterial colonization model. Canals of 26 extracted human cani...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)81186-6
更新日期:1994-02-01 00:00:00
abstract::Orthodontic tooth movement has been implicated in secondary changes to the dental pulp. The purpose of this study was to correlate the effects of orthodontic tooth movement on the dental pulp by histomorphometric parameters. Four groups, each consisting of 36 male adult Sprague-Dawley strain rats, were studied with di...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)81034-4
更新日期:1993-01-01 00:00:00
abstract::This case report describes the clinical, radiologic, and histopathologic features of the glandular odontogenic cyst (GOC). Although a relatively rare lesion not previously reported in the endodontic literature, the GOC is recommended for inclusion in a differential diagnosis of a dentoalveolar radiolucency. The GOC is...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200403000-00014
更新日期:2004-03-01 00:00:00
abstract::There are no quantitative data on the mechanical efficacy of irrigation in the removal of bacteria from curved canals. This study quantitatively analyzed the effects of root canal curvature and preparation size on the mechanical efficacy of irrigation using 33 mandibular single-rooted bicuspids allocated to groups acc...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2006.04.011
更新日期:2006-11-01 00:00:00
abstract::This study evaluated the degree of conversion of one dual-cured resin cement when used to lute fiber posts with different translucencies. To measure the degree of conversion, polyvinylsiloxane molds were prepared to simulate root canals. The posts, Aestheti-Post or Light-Post, were cemented in these molds and, after p...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2006.11.015
更新日期:2007-03-01 00:00:00
abstract::The purpose of this study was to evaluate the strengthening effect of an internal resin bonding technique. One hundred central incisors were endodontically treated and divided equally into five groups. Group 1, without any cervical preparation and with access repaired with bonded resin, served as the positive control....
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(98)80108-8
更新日期:1998-04-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to compare 2 reciprocating nickel-titanium systems with different manufacturing characteristics and to evaluate the influence of simulated clinical use on their torsional resistance. METHODS:New 25/.08 WaveOne Primary (WO; Dentsply Sirona, York, PA) and 25/.07 WaveOne Gold Primar...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.04.009
更新日期:2019-08-01 00:00:00
abstract:INTRODUCTION:Dental discoloration with use of materials containing bismuth oxide has been reported. It is postulated that the discoloration is a result of chemical interaction of bismuth oxide with dentin. The aim of the study was to analyze dental color alteration and the chemical interaction of bismuth oxide with the...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2014.01.044
更新日期:2014-08-01 00:00:00
abstract::A long-standing lesion associated with an undetected perforation of the furca in a mandibular molar was successfully managed using a multidisciplinary treatment approach. The sequence of therapeutic procedures involved conventional endodontic retreatment, an initial orthograde sealing of the perforation, guided tissue...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)80989-1
更新日期:1995-11-01 00:00:00
abstract:INTRODUCTION:Mixtures of clodronate with sodium hypochlorite (NaOCl) better maintain free available chlorine (FAC) than etidronate-hypochlorite mixtures. This research aimed to compare organic tissue dissolution and residual FAC between clodronate and etidronate mixtures. Additionally, clodronate-hypochlorite mixtures ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.10.020
更新日期:2020-02-01 00:00:00
abstract::Vascular casts of cat premolar pulps in various stages of growth were made by injection of low-viscosity resin into the pulpal blood vessels. Examination under a scanning electron microscope revealed that, in the young pulp, the main arterioles ascend in the center of the pulp and venules run along the side of the roo...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(89)80028-7
更新日期:1989-10-01 00:00:00
abstract:INTRODUCTION:Buffered local anesthetics have not been studied for incision and drainage procedures in dentistry. The purpose of this prospective, randomized, double-blind study was to compare the pain of infiltration and pain of an incision and drainage procedure by using a buffered versus a nonbuffered 2% lidocaine wi...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2013.07.008
更新日期:2013-11-01 00:00:00
abstract::Teeth are vital sensory organs that contribute to our daily activities of living. Unfortunately, teeth can be lost for several reasons including trauma, caries, and periodontal disease. Although dental trauma injuries and caries are more frequently encountered in a younger population, tooth loss because of periodontal...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.05.014
更新日期:2019-12-01 00:00:00
abstract::The purpose of this study was to compare the in vitro sealing capacity of five materials, each used as a temporary sealing agent for the walking bleach technique. All teeth received traditional biomechanical root canal instrumentation, after which the walking bleach agent was placed in the pulp chamber space. The occl...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200012000-00011
更新日期:2000-12-01 00:00:00
abstract::The cytotoxicity of four different calcium hydroxide-based root canal sealers (Sealapex, Apexit, CRCS, and Endoflas FS) was tested using human gingiva fibroblasts. The fibroblasts were acquired from the attached gingiva of apparently healthy patients. The sealers were allowed to set for 24 and 48 h before being covere...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)81309-9
更新日期:1992-03-01 00:00:00
abstract:INTRODUCTION:The health of human teeth depends on the integrity of the hard tissue and the activity of the pulp and periodontal tissues, which are responsible for nutritional supply. Without the nourishing of the pulp tissue, the possibility of tooth fracture can increase. In immature permanent teeth, root development ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2012.10.002
更新日期:2013-02-01 00:00:00
abstract::The aim of this in vitro study was to investigate the effect of the smear layer on apical microleakage in teeth obturated with mineral trioxide aggregate (MTA). Fifty single-rooted central maxillary teeth were used in this study. All teeth were instrumented to size 60 by using the step-back technique. The selected tee...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2008.08.022
更新日期:2008-12-01 00:00:00
abstract::The objective of this study was to evaluate the cytotoxicity of three endodontic sealers (AH Plus/Maillefer-Dentsply, Epiphany/Pentron, GuttaFlow, Coltene-Whaledent). Materials were mixed according to the manufacturer instructions and packed into Teflon molds (10 x 1 mm). For cytotoxicity testing (MTT method), the spe...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2006.05.006
更新日期:2006-10-01 00:00:00
abstract:INTRODUCTION:The purpose of this investigation was to determine the effect that apical preparation size and preparation taper have on the volume of irrigant delivered at the working length for different canal curvatures using apical negative pressure irrigation. METHODS:One hundred fifty-five human teeth (55 maxillary...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2012.10.008
更新日期:2013-01-01 00:00:00