Abstract：
:The difference in resistance to bacterial invasion into the dentinal tubules between vital and nonvital teeth has not been determined. This study was conducted to clarify the effect of vital pulp on bacterial invasion into the dentinal tubules. The specimens were 19 intact pairs of bilateral upper third molars of 19 healthy, young adult male volunteers. In each case, 30 or 150 days before extraction, pulpectomies and root canal fillings were carried out unilaterally and a class V cavity involving the dentin was made on the palatal surface of both the pulpectomized tooth and the nonpulpectomized opposite tooth. The cavities were left unprotected to expose them to oral flora until the extractions were done, and the extracted teeth were examined histologically. When extraction followed 150-day exposure to the oral flora, there was a statistically significant difference in the bacterial invasion rate between the vital and nonvital teeth. It was postulated that vital teeth were much more resistant to bacterial invasion into the dentinal tubules than were nonvital teeth, thereby suggesting that the vital pulp plays some important role in this process.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Nagaoka S,Miyazaki Y,Liu HJ,Iwamoto Y,Kitano M,Kawagoe Mdoi
10.1016/S0099-2399(06)81098-8subject
Has Abstractpub_date
1995-02-01 00:00:00pages
70-3issue
2eissn
0099-2399issn
1878-3554pii
S0099-2399(06)81098-8journal_volume
21pub_type
杂志文章abstract：:The purpose of this in vitro study was to compare the extrusion of thermoplacticized gutta-percha in teeth instrumented with Profile 0.06 or Profile GT, and obturated with Thermafil Plus and Thermafil GT, respectively. A total of 120, extracted, human maxillary central incisors were divided into four equal groups. Gro...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200406000-00010
更新日期：2004-06-01 00:00:00
abstract：:The purpose of this survey was to investigate the frequency and characteristics of surgery among active endodontists in the United States. The survey also inquired about residency and postresidency training in endodontic surgery. A Web-based questionnaire regarding endodontic surgery was distributed via e-mail to 2,53...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.10.008
更新日期：2009-01-01 00:00:00
abstract：:Enterococcus faecalis, a pathogenic gram-positive bacterium, is closely related to refractory apical periodontitis. Because lipoteichoic acid (LTA) is considered a major virulence factor of gram-positive bacteria, in the present study, highly pure LTA from E. faecalis was prepared, and its ability to stimulate murine ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.05.005
更新日期：2008-08-01 00:00:00
abstract：INTRODUCTION:Periodontal mechanoreceptors (PMRs) are refined neural receptors present in abundance at the root apex and have a pivotal role in oral fine motor control. This case-control study aimed to evaluate the oral fine motor control of teeth treated with endodontic microsurgery (EMS) in comparison with the control...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2020.10.022
更新日期：2021-02-01 00:00:00
abstract：INTRODUCTION:The mental foramen (MF) is an important landmark in dentistry. Knowledge of its position is central to perform block anesthesia of the mental nerve or to avoid nerve damage during surgical procedures in the premolar area of the mandible. The present radiographic study aimed at evaluating the location and d...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2013.07.033
更新日期：2013-12-01 00:00:00
abstract：:The purpose of this study was to determine the incidence of endodontic services provided to participants in a longitudinal cohort study. The "Florida Dental Care Study" was a prospective cohort study using a representative baseline sample of 873 dentate adults. An in-person interview and clinical dental exam were cond...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200312000-00005
更新日期：2003-12-01 00:00:00
abstract：:The water sorption and solubility characteristics of three contemporary methacrylate resin-based endodontic sealers, EndoREZ, Epiphany, and InnoEndo, were compared with those obtained from Kerr EWT, Ketac-Endo (positive control), GuttaFlow, and AH Plus (both negative controls). Ten disks of each material were dehydrat...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2006.03.021
更新日期：2007-08-01 00:00:00
abstract：:Characteristics of cyclooxygenase-2 (COX-2) expressing cells in human dental pulp were immunohistologically studied. Extirpated pulpal tissues from extracted teeth were examined to elucidate the localization and distribution of COX-2. Pulpal tissues were examined by the labeled streptavidin biotin method using specifi...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200106000-00003
更新日期：2001-06-01 00:00:00
abstract：:Microbial control--fundamental to healing of apical periodontitis--is central to endodontic practice. The effectiveness of antibacterial measures is generally monitored (in clinical research studies) by microbiological root canal sampling (MRS), which is often used as a predictor for healing. This article addresses th...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2006.11.006
更新日期：2007-03-01 00:00:00
abstract：:This study compared the apical seal produced by four obturation techniques. Sixty-four extracted human teeth were prepared and obturated using lateral condensation of gutta-percha that was either unmodified or was dipped in chloroform, eucalyptol, or eucapercha paste. After storage in normal saline and 0.02% azide sol...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(89)80158-X
更新日期：1989-12-01 00:00:00
abstract：:The extraoral sinus tract may occur as a result of an inflammatory process associated with a necrotic pulp. However, several non-odontogenic disorders may also produce an extraoral sinus tract. Thus, the differential diagnosis of this clinical finding is of paramount importance in providing appropriate clinical care b...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200312000-00015
更新日期：2003-12-01 00:00:00
abstract：:The present survey was conducted to obtain answers to some basic questions regarding the use of intracanal medications, root canal filling methods, and the intracanal breakage of instruments. A letter was sent to 300 endodontists listed in the 1995-1996 membership roster of the American Association of Endodontists. Ei...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(99)80306-9
更新日期：1999-12-01 00:00:00
abstract：INTRODUCTION:It has been widely accepted that dental pulp stem cells (DPSCs), which are a class of self-renewal and differentiation potential of adult stem cells, play an important role in the repair procession of pulp's inflammation. We investigated whether tumor necrosis factor alpha (TNF-α) could induce the prolifer...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.02.020
更新日期：2015-07-01 00:00:00
abstract：INTRODUCTION:Mineral trioxide aggregate (MTA) satisfies most of the ideal properties of a surgical root-end filling and perforation repair material. It has been found to be nontoxic, noncarcinogenic, nongenotoxic, biocompatible, insoluble in tissue fluids, and dimensionally stable and promotes cementogenesis. The major...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.03.013
更新日期：2012-07-01 00:00:00
abstract：:An in vitro study was conducted to determine the susceptibility of the yeast Candida albicans to various intracanal irrigants and medications. The minimum inhibitory concentration (MIC) of sodium hypochlorite, hydrogen peroxide, chlorhexidine digluconate, and aqueous calcium hydroxide that is required to kill a standa...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200202000-00004
更新日期：2002-02-01 00:00:00
abstract：INTRODUCTION:Securing a reproducible glide path before instrumentation is recommended to maintain the original geometry of the root canal system and to prevent file separation. Mechanical glide path management systems have been introduced to expedite this step. The aim of this study was to compare apical transportation...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.07.014
更新日期：2015-11-01 00:00:00
abstract：:The aim of this study was to investigate the prevalence and configuration of the C-shaped canal using serial axial computed tomography images of the mandibular second molars that had not been restored severely or treated endodontically, and to compare the thickness of the remaining tooth structure from the center of t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2005.10.007
更新日期：2006-01-01 00:00:00
abstract：:Ninety-six human molars were accessed. After flattening of the occlusal surface and removal of the apical two-thirds of the roots, the remaining canal space was instrumented by conventional methods. The teeth were divided into six groups of 15 teeth with three positive and three negative controls. The six experimental...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)80078-6
更新日期：1994-12-01 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：INTRODUCTION:The purpose of this retrospective study was to determine the success of the inferior alveolar nerve (IAN) block using either 3.6 mL or 1.8 mL 2% lidocaine with 1:100,000 epinephrine in patients presenting with symptomatic irreversible pulpitis. METHODS:As part of 7 previously published studies, 319 emerge...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2013.04.007
更新日期：2013-08-01 00:00:00
abstract：:The antimicrobial effect of RC-Prep and its components--10% urea peroxide, 15% EDTA, and glycol--were evaluated individually, in vitro, within dentinal tubules. Standardized bovine incisor root specimens that had been infected with either Staphylococcus aureus or Streptococcus peltzer were incubated with each agent fo...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(99)80296-9
更新日期：1999-12-01 00:00:00
abstract：INTRODUCTION:The aim was to assess the association of inducible costimulator (ICOS) and ICOS ligand with bone destruction in apical periodontitis (AP). METHODS:Specimens from patients presenting with AP were obtained during apicoectomy and subjected to histopathologic analysis and molecular assessment of ICOS/ICOS lig...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.03.018
更新日期：2019-07-01 00:00:00
abstract：:The mesiobuccal roots of 50 randomly selected maxillary first molars were examined to assess the incidence and position of the canal isthmus. Transverse serial sections of the apical 6 mm of each root were prepared in 1-mm increments. The apical side of each section was stained with methylene blue dye, viewed with a s...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/s0099-2399(06)80975-1
更新日期：1995-07-01 00:00:00
abstract：INTRODUCTION:Interferon regulatory factor 8 (IRF8) is a critical transcription factor in innate immune responses that regulates the development and function of myeloid cells. Human periapical lesions are caused by endodontic microbial infections. However, the presence of IRF8 in human periapical lesions remains elusive...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.04.015
更新日期：2018-08-01 00:00:00
abstract：INTRODUCTION:The objective of this study was to investigate the association between chronic apical periodontitis (CAP) and low-birth-weight preterm births (LBWPB). METHODS:Sixty-three women in postpartum period were included in this case-control study. The case group consisted of mothers of LBWPB infants (n = 33), and...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2014.11.018
更新日期：2015-03-01 00:00:00
abstract：:The current external inflammatory root resorption treatment protocol, which uses calcium hydroxide dressing, usually comprises multiple and long-term applications. In addition to the need for multiple appointments for calcium hydroxide replacement, the long-term maintenance of this compound in the root canal weakens d...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.03.019
更新日期：2015-09-01 00:00:00
abstract：:Primary intraosseous salivary gland tumors are rare, with mucopidermoid carcinoma being the most frequent histotype. The authors present a case of adenoid cystic carcinoma, located in the mandibular incisor region, associated with pain. Endodontic treatment resulted in increased pain and progressive mandibular expansi...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200012000-00026
更新日期：2000-12-01 00:00:00
abstract：INTRODUCTION:The study compared Twisted File (TF) with 3 traditionally manufactured systems to determine whether changes in the manufacturing process improved the cyclic fatigue resistance. METHODS:Four rotary file systems, (1) ProFile (PF), (2) Mtwo, (3) K3, and (4) TF, were tested in artificial canals with 45° and 9...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.12.034
更新日期：2012-04-01 00:00:00
abstract：INTRODUCTION:Studies have found women try to avoid pain more than men, accept it less, and fear it more. The role of operator gender on subject gender pain in a clinical setting needs further study. The purpose of this randomized, double-blind investigation was to evaluate operator gender and its influence on reported ...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2014.10.001
更新日期：2015-02-01 00:00:00
abstract：:This study compared a tapered, calibrated spreader/plugger instrument (M-series) to noncalibrated spreaders and pluggers in achieving apical condensation of gutta-percha in 20 single-rooted human teeth. The distances between the tip of the instruments and the tip of the master gutta-percha were measured. Results showe...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)80680-1
更新日期：1993-04-01 00:00:00
