Abstract:
INTRODUCTION:This study aimed to evaluate the frequency of dentinal microcracks observed after root canal preparation with 2 reciprocating and a conventional full-sequence rotary system using micro-computed tomographic analysis. METHODS:Thirty mesial roots of mandibular molars presenting a type II Vertucci canal configuration were scanned at an isotropic resolution of 14.16 μm. The sample was randomly assigned to 3 experimental groups (n = 10) according to the system used for the root canal preparation: group A-Reciproc (VDW, Munich, Germany), group B-WaveOne (Dentsply Maillefer, Baillagues, Switzerland), and group C-BioRaCe (FKG Dentaire, La-Chaux-de-Fonds, Switzerland). Second and third scans were taken after the root canals were prepared with instruments sizes 25 and 40, respectively. Then, pre- and postoperative cross-section images of the roots (N = 65,340) were screened to identify the presence of dentinal defects. RESULTS:Dentinal microcracks were observed in 8.72% (n = 5697), 11.01% (n = 7197), and 7.91% (n = 5169) of the cross-sections from groups A (Reciproc), B (WaveOne), and C (BioRaCe), respectively. All dentinal defects identified in the postoperative cross-sections were also observed in the corresponding preoperative images. CONCLUSIONS:No causal relationship between dentinal microcrack formation and canal preparation procedures with Reciproc, WaveOne, and BioRaCe systems was observed.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
De-Deus G,Silva EJ,Marins J,Souza E,Neves Ade A,Gonçalves Belladonna F,Alves H,Lopes RT,Versiani MAdoi
10.1016/j.joen.2014.02.019subject
Has Abstractpub_date
2014-09-01 00:00:00pages
1447-50issue
9eissn
0099-2399issn
1878-3554pii
S0099-2399(14)00195-2journal_volume
40pub_type
杂志文章abstract:INTRODUCTION:The purpose of this article was to compare the cyclic fatigue resistance of Reciproc and Reciproc Blue files (VDW GmbH, Munich, Germany) that were used to prepare root canals of mandibular molar teeth with or without a glide path. METHODS:Sixty Reciproc R25 and 60 Reciproc Blue R25 files were used. The Re...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2018.03.004
更新日期:2018-06-01 00:00:00
abstract::This study attempts to evaluate the oral manifestations of and the limited available dental pulp information on diabetes mellitus, a common metabolic disorder of carbohydrate and lipid metabolism affecting over 16 million Americans. Diabetics are particularly prone to bacterial or opportunistic infections. This vulner...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1097/00004770-200306000-00001
更新日期:2003-06-01 00:00:00
abstract::This in vitro study was carried out to determine (1) the hydrophobicity of selected oral bacteria, (2) the influence of growth media (saliva and serum) and mode of growth (planktonic or biofilm) on the hydrophobicity of Enterococcus faecalis, and (3) the influence of growth media and conditioning fluids on the adheren...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2007.07.035
更新日期:2007-12-01 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::The purpose of this study was to evaluate the effect of citric acid and EDTA solutions on the microhardness and the roughness of human root canal dentin. Forty-five human teeth sectioned longitudinally were used. Specimens were randomly divided into three groups of 30 teeth each and were treated as follows: (a) one mo...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/01.don.0000136212.53475.ad
更新日期:2005-02-01 00:00:00
abstract:INTRODUCTION:The retrieval of fractured instruments from root canals has been largely reported in the literature. However, a less complex retrieval method that causes minimum damage to the dental structures is needed. The aim of this article is to introduce a new concept of retrieval of fractured instruments from root ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2009.11.024
更新日期:2010-04-01 00:00:00
abstract::The purpose of this study was to compare Schick CDR and Trophy RVGui direct digital radiography (DDR) systems for the ability to detect periapical lesions in human cadaver mandibles. Digital radiographs were exposed of teeth with normal periapical areas and of teeth with artificially prepared periapical lesions using ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/01.don.0000140571.23012.ff
更新日期:2005-04-01 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:Previous studies have suggested that masticatory forces are associated with cracked teeth, but it is not clear which specific poor oral masticatory habits may be more likely to cause cracks. The aim of this study was to quantitatively assess risk factors for cracked teeth among poor oral masticatory habits...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2017.01.007
更新日期:2017-06-01 00:00:00
abstract::Dental pulp is a soft mesenchymal tissue densely innervated by afferent (sensory) fibers, sympathetic fibers, and parasympathetic fibers. This complexity in pulp innervation has motivated numerous investigations regarding how these 3 major neuronal systems regulate pulp physiology and pathology. Most of this research ...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1016/j.joen.2008.03.010
更新日期:2008-07-01 00:00:00
abstract::Enterococcus faecalis has been suggested to be an important etiological agent in endodontic failures. The purpose of this study was to evaluate the effectiveness of chlorhexidine- or antibiotics-based medications in eliminating E. faecalis biofilms. One-day and three-day biofilms of E. faecalis were induced on cellulo...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200110000-00004
更新日期:2001-10-01 00:00:00
abstract::This report examines three clinical cases of root-filled teeth with primary endodontic lesions. During endodontic surgery, an area of incomplete root bifurcation beginning in the coronal or middle third of the root surface and terminating at or near the apical foramen were observed. The radicular grooves of two teeth ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200005000-00012
更新日期:2000-05-01 00:00:00
abstract::This in vitro study evaluated the survival rate and fracture resistance of maxillary central incisors restored with different post and core systems. The post and core systems investigated were a prefabricated high precious metal post with cast core (group A), zirconia post with a prefabricated bonded ceramic core (gro...
journal_title:Journal of endodontics
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004770-200210000-00008
更新日期:2002-10-01 00:00:00
abstract::Ultrasonic root-end preparation techniques have recently been introduced and revolutionized the field of endodontic surgery. The purpose of this study was to compare quantitatively the quality of root-end preparation techniques prepared by a specially designed ultrasonic retrotip with those prepared in a traditional m...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(98)80152-0
更新日期:1998-10-01 00:00:00
abstract:INTRODUCTION:In regenerative endodontic treatment (RET) for immature permanent tooth, better treatment results could be obtained by applying platelet-rich plasma (PRP) as the scaffold rather than the blood clot. The goal of this study was to compare the histologic differences between using PRP and blood clot in RET. M...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2014.03.020
更新日期:2014-09-01 00:00:00
abstract:INTRODUCTION:The anatomy of the maxillary C-shaped molar has been the subject of several case reports although no true prevalence research has ever been conducted. The aim of this observational study was to evaluate and characterize the incidence of these morphologies using cone-beam computed tomographic (CBCT) technol...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2015.12.013
更新日期:2016-03-01 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:INTRODUCTION:MicroRNAs (miRs) are a family of noncoding RNAs that regulate gene expression. They are ubiquitous among multicellular eukaryotes and are also encoded by some viruses. Upon infection, viral miRs (vmiRs) can potentially target gene expression in the host and alter the immune response. Although prior studies...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.10.006
更新日期:2017-01-01 00:00:00
abstract::A case is presented in which endodontic treatment of a maxillary lateral incisor with a talon cusp and two root canals failed following a mistaken diagnosis. What was first diagnosed as an endodontic lesion was, in all probability, a primary periodontal lesion caused by the advance of bacteria from the gingival crevic...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)81947-3
更新日期:1990-07-01 00:00:00
abstract::Propolis, a flavonoid-rich product of honey comb, exhibits antibacterial and anti-inflammatory properties. In this study, we examined the tolerance of fibroblasts of the periodontal ligament (PDL) and dental pulp to propolis and compared with that of calcium hydroxide in vitro. Cells from human dental pulp and PDL wer...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200405000-00012
更新日期:2004-05-01 00:00:00
abstract:INTRODUCTION:The purpose of this study was to compare centering ability and apical canal transportation of K-files (KF), ProGlider (PG), and G-Files (GF) after glide path enlargement in curved canals by using micro-computed tomography. METHODS:Thirty canals each were randomly assigned to KF, GF, and PG. Teeth were sca...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.04.005
更新日期:2016-07-01 00:00:00
abstract::Pulpitis, external root resorption, and pain may be experienced during orthodontic movement. The use of nonsteroidal anti-inflammatory drugs (NSAIDs) has been suggested to control these changes. The purpose of this study was to observe pulp-dentinal reactions, root resorption, tooth pain, and tooth movement after the ...
journal_title:Journal of endodontics
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/01.don.0000134212.20525.74
更新日期:2005-01-01 00:00:00
abstract:INTRODUCTION:The diagnosis and treatment planning of cracked teeth depend on the understanding of how cracks affect the surrounding tissues. This study evaluated the dentin and pulp conditions in teeth affected by cracks and attrition. METHODS:Specimens under investigation included 12 cracked posterior teeth and 8 tee...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2014.09.021
更新日期:2015-03-01 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: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::Dentinal chips and different biocompatible materials have been used in the past as apical plugs to enhance healing and simplify obturation. The purpose of this study was to evaluate bone reactions to implants of hydroxyapatite, collagen, and calcium hydroxide, alone or in different combinations. The materials were imp...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(07)80175-0
更新日期:1990-10-01 00:00:00
abstract:INTRODUCTION:An ideal root canal sealer creates a bacteria-resistant seal and exhibits antimicrobial activity, biocompatibility, and osteoconductivity. The aim of this study was to assess the effects of 3 root canal sealers on cell viability, inflammatory response, and osteogenic potential in MC3T3-E1 cells. METHODS:A...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2018.09.006
更新日期:2019-01-01 00:00:00
abstract:INTRODUCTION:The aim of the present study was to compare sonic activation using EDDY (VDW, Munich, Germany), passive ultrasonic irrigation (PUI), and mechanical activation using the XPendo Finisher (FKG Dentaire, La Chaux-des-Fonds, Switzerland) for the removal of calcium hydroxide from artificial grooves in straight r...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2018.11.001
更新日期:2019-03-01 00:00:00
abstract::Biofilm mode of growth is a strategy in microorganisms to survive harsh growth conditions. Although previous studies have established the ability of Enterococcus faecalis to survive postendodontic environmental conditions, the effect of such conditions on the ultrastructural and physiochemical features of E. faecalis ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/01.don.0000164855.98346.fc
更新日期:2005-12-01 00:00:00
abstract:INTRODUCTION:Complement activation is considered a major mechanism in innate immunity. Although it is mainly involved in initiating inflammation, recent data reported its involvement in other processes such as tissue regeneration. In the dental pulp, complement C5a fragment has been shown to be involved in the recruitm...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.06.011
更新日期:2016-09-01 00:00:00