Abstract：
:An examination of 5616 endodontically treated and retreated maxillary first and second molars was made in an attempt to determine the percentage of MB2 canals that could be located routinely, and evaluate if there were any significant differences between initial treatments and retreatments. The teeth examined were 3578 first molars and 2038 second molars treated consecutively over a 5-yr period by six endodontists. Overall the MB2 canal was found in 2133 (60%) first molars, and 712 (35%) second molars. The incidence of a MB2 canal in first molar retreatments was 66% compared to a 58% incidence in initial treatments. Whereas in second molars the retreatment incidence was 40% compared to 34% in initial treatments. The significant difference in the incidence of a MB2 canal between initial treatments and retreatments suggests that failure to find and treat existing MB2 canals will decrease the long-term prognosis.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Wolcott J,Ishley D,Kennedy W,Johnson S,Minnich S,Meyers Jdoi
10.1097/01.don.0000140581.38492.8bkeywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
262-4issue
4eissn
0099-2399issn
1878-3554pii
S0099-2399(05)60151-3journal_volume
31pub_type
杂志文章abstract：:The purposes of this study were to determine quantitatively the amount of debris and irrigant forced in an apical direction, the frequency of apical plug development, and the time required to prepare canals when a step-back technique using K-files was compared with the .04 Taper system. Sixty-nine extracted teeth with...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(98)80206-9
更新日期：1998-01-01 00:00:00
abstract：INTRODUCTION:The purpose of the present study was to evaluate the thickness and the anatomic characteristics of the Schneiderian membrane and cortical bone using limited cone beam computed tomography (CBCT) scannning in patients referred for planning of apical surgery of maxillary molars. METHODS:This controlled study...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.09.023
更新日期：2012-01-01 00:00:00
abstract：INTRODUCTION:Cone-beam computed tomographic (CBCT) imaging is a valuable tool for endodontic therapy. The aim of this study was to verify whether clinical use of CBCT imaging can accurately acquire parameters concerning molar pulp chamber landmarks, which are important data to help start a successful access cavity and ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2014.04.002
更新日期：2014-09-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to evaluate porcine palatal mucosa dissolution by sodium hypochlorite (NaOCl) with or without an auxiliary dissolving agent containing glycocholic acid and a mixture of surfactants (Keratobacter [KB]; Saint Joseph DID, Valencia, Spain). METHODS:One hundred forty samples were obta...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.01.007
更新日期：2018-05-01 00:00:00
abstract：:Analyses with the scanning electron microscope and the X-ray microprobe were performed on 13 silver cones removed from 12 patients. The cones showed changes that ranged from surface dulling to black corrosion and pitting. Sulfur and chlorine were detected at the apical end of the cones and in the biopsy specimens of p...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(75)80198-1
更新日期：1975-06-01 00:00:00
abstract：:The expression of the vanilloid receptor subtype 1 (VR1, TRPV1) was detected in human dental pulp fibroblasts (PF-10) using RT-PCR, Western blotting, and immunocytochemical analysis. As revealed by ELISA, capsaicin induced IL-6 expression in PF-10 cells, and the VR1 antagonist capsazepine dose-dependently inhibited ca...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/01.don.0000155259.22746.ae
更新日期：2005-09-01 00:00:00
abstract：:Taurodontism is a morphoanatomical change in the shape of a tooth, which usually occurs in multirooted teeth. An enlarged body and pulp chamber, as well as apical displacement of the pulpal floor, are characteristic features. Endodontic treatment of a taurodont tooth is challenging, because it requires special care in...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200305000-00009
更新日期：2003-05-01 00:00:00
abstract：:Three randomly assigned groups of single-canaled extracted teeth obturated with gutta-percha were retreated using controlled application of one of three organic solvents: chloroform, xylene, or halothane. Two additional groups of teeth served as positive and negative controls. Residual volume of solvent expressed thro...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(98)80098-8
更新日期：1998-04-01 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：INTRODUCTION:Revascularization is a valuable treatment in immature necrotic teeth that allows the continuation of root development. In this article we describe successful revascularization treatment of 2 necrotic immature first mandibular molars. METHODS:The clinical and radiographic examinations showed extensive coro...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2011.01.011
更新日期：2011-04-01 00:00:00
abstract：INTRODUCTION:Calcium hydroxide (CH) and nano-calcium hydroxide (NCH) as intracanal medicaments may affect the physical and chemical properties of dentin. The aim of this investigation was to evaluate the effects of CH and NCH on the microhardness and superficial chemical structure of radicular dentin. METHODS:In this ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.06.002
更新日期：2019-09-01 00:00:00
abstract：INTRODUCTION:During apicoectomy and retrograde cavity preparation, a smear layer, which contains microorganisms and necrotic pulpal tissues, is formed on the dentinal surfaces cut by the instruments. Bacteria can survive and proliferate inside or below the smear layer. The purpose of this study was to evaluate in vitro...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2011.03.001
更新日期：2011-06-01 00:00:00
abstract：INTRODUCTION:This finite element analysis study was aimed at evaluating the effects of rotary systems on stresses in photopolymerized resin root models with oval-shaped canals. METHODS:Among the data collected by computed tomographic imaging, a mandibular second premolar tooth with an oval-shaped canal was selected, r...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.05.007
更新日期：2016-08-01 00:00:00
abstract：:This study compares the incidence, degree, and length of postoperative pain in 300 endodontically treated teeth, with and without apical patency, in relation to some diagnostic factors (vitality, presence of preoperative pain, group, and mandible of treated tooth). Of the questionnaires received back, apical patency w...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2008.11.014
更新日期：2009-02-01 00:00:00
abstract：INTRODUCTION:This ex vivo study compared the disinfection and shaping abilities of 2 preparation protocols in C-shaped canals. METHODS:Mandibular second molars with type I C-shaped canals were pair matched based on micro-computed tomographic (micro-CT) analysis and distributed into 2 groups. The canals were contaminat...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2020.11.007
更新日期：2020-11-18 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：INTRODUCTION:More information regarding the ability of single files to maintain the original canal position is required before adopting a single-file approach to cleaning and shaping. This study compares apical transportation in curved root canals when instrumenting with a single WaveOne (WO) file (Dentsply Tulsa Denta...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2013.09.021
更新日期：2014-05-01 00:00:00
abstract：:It is known that many factors participate in the process of inflammation and pain transmission. Recently, various neuropeptides have been demonstrated in the intrapulpal nerve fibers immunobiohistochemically. These neuropeptides may play some role in the process of inflammation and transmission of pain sensation. In t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81566-9
更新日期：1990-02-01 00:00:00
abstract：INTRODUCTION:Fusion is a rare occurrence, and its definitive diagnosis is of prime importance for successful root canal treatment. This case report discusses the endodontic management of a supernumerary tooth fused with a right maxillary first molar by using cone-beam computed tomography (CBCT). METHODS:Nonsurgical en...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.08.026
更新日期：2010-11-01 00:00:00
abstract：:Twenty-one teeth with clinically asymptomatic periapical pathosis (class 3) were extracted and the isolation, identification, and localization of bacteria in the root apex were examined. Mixtures involving several bacteria were isolated from more than 60% of the cases. Scanning electron microscopy revealed bacterial m...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(07)80216-0
更新日期：1990-11-01 00:00:00
abstract：INTRODUCTION:Fractured endodontic files present a major problem. A novel method has been proposed to retrieve fractured nickel-titanium (NiTi) endodontic files by using electrochemical dissolution. However, the effect of file dissolution on adjacent soft tissues such as the periodontal ligament (PDL) has not been inves...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.12.013
更新日期：2013-05-01 00:00:00
abstract：:Osteoradionecrosis (ORN) of the jaw is considered the most severe long-term adverse effect that can occur in radiation therapy patients. Teeth extractions and dental diseases are the main risk factors for ORN in irradiated patients. The aim of this case series was to evaluate the outcome of primary root canal treatmen...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.12.005
更新日期：2020-04-01 00:00:00
abstract：:The effects of various cleaning, chemical disinfection, and sterilization procedures on the cutting efficiency of endodontic instruments Unifile (De Trey, Bois Colombes, France), (Flexofile Maillefer, Ballaigues, Switzerland), and H-File (Maillefer)) were investigated. The cross-infection control treatment procedures ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(96)80059-8
更新日期：1996-12-01 00:00:00
abstract：INTRODUCTION:Resin-based dental materials contain various diluent monomers that can interfere with vascular function by causing vasodilation. In this study, we evaluated the vasoactive potential of hydroxyethyl methacrylate (HEMA) and triethylene glycol dimethacrylate (TEGDMA) and the possible mechanism of their vascul...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.11.038
更新日期：2011-03-01 00:00:00
abstract：:This study compared the weight and radiographic appearance of Ca(OH)(2) delivered into standardized, minimally and fully prepared canals using (a) an injection system, (b) an endodontic Flex-O file rotated counter-clockwise, (c) a lentulo spiral, and (d) a .04 rotary NiTi file rotated in reverse. Two extracted human s...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2006.01.009
更新日期：2006-07-01 00:00:00
abstract：:Pulp regeneration is a biologic process occurring under specific circumstances. An endodontic treatment modality to accomplish pulp regeneration has emerged based on the response of undifferentiated cells that are often referred to as stem cells. The treatment itself is currently empirical based on clinicians' thought...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2014.01.017
更新日期：2014-04-01 00:00:00
abstract：:Increased levels of interleukin-1 (IL)-1, tumor necrosis factor-alpha (TNF-alpha), IL-6, and prostaglandin E2 (PGE2) have been detected in inflamed pulp tissue. To gain further insight into the molecular pathogenesis of pulpitis, we investigated the effects of IL-1alpha or TNF-alpha and PGE2, either alone or in combin...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200203000-00013
更新日期：2002-03-01 00:00:00
abstract：:The purpose of this study was to quantify the amount of remaining gutta-percha/sealer after retreatment of post space prepared teeth obturated with a lateral condensation technique or with Thermafil with plastic and metallic carrier. The time required for retreatment was also recorded. Forty-five extracted mandibular ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/s0099-2399(06)80019-1
更新日期：1994-01-01 00:00:00
abstract：:This study investigated the possibility of saliva recontamination occurring between the root canal wall and sealer through dentinal tubules exposed after the cementum was removed at the cervical level by root planing and treatment with citric acid. Thirty-four extracted human maxillary anterior teeth were randomly pla...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(96)80024-0
更新日期：1996-11-01 00:00:00
abstract：:The oral region comprises 1% of the total body area, yet it accounts for 5% of all bodily injuries. In preschool children, oral injuries make up as much as 17% of all bodily injuries. The incidence of traumatic dental injuries is 1%-3%, and the prevalence is steady at 20%-30%. The annual cost of treatment is US $2-$5 ...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2012.11.021
更新日期：2013-03-01 00:00:00
