Abstract：
:The influence of different obturation techniques (lateral condensation, Obtura, and Thermafil) on root strains was assessed in 27 upper central incisors using strain gauges mounted on the coronal and apical one-thirds of the root surface. The vertical load applied with each obturation technique was also measured. Comparison of the strains was conducted with two-way analysis of covariance (with condensation load as covariate). The technique of obturation significantly influenced the root strains, with the Obtura generating the highest strains. The Thermafil group showed significantly less strain than the Obtura or lateral condensation groups. Thermal expansion of dentin was an unexpected finding. A large proportion of strain in the Obtura and Thermafil groups was found to be thermal strain. The mean load required to cause vertical root fracture was five to six times higher than the load used in obturation.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Saw LH,Messer HHdoi
10.1016/S0099-2399(06)81008-3subject
Has Abstractpub_date
1995-06-01 00:00:00pages
314-20issue
6eissn
0099-2399issn
1878-3554pii
S0099-2399(06)81008-3journal_volume
21pub_type
杂志文章abstract：INTRODUCTION:This in vitro study compared 3 agitation and 2 irrigation devices to ultrasonic agitation at mechanically removing bacteria from a plastic simulated canal, instrumented to 35/.06. METHODS:The plastic blocks were divided into seven groups. The control (C) group with brain-heart infusion (BHI) broth (steril...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2009.04.007
更新日期：2009-07-01 00:00:00
abstract：INTRODUCTION:The inferior alveolar nerve (IAN) injection is 1 of the most commonly administered and useful injections in the field of dentistry. Practitioners use intraoral anatomic landmarks, which vary greatly among patients. The objective of this study was to assist practitioners by identifying a range of normal var...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.12.009
更新日期：2016-03-01 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：:Calcium hydroxide is the "gold standard" endodontic medication, but it may fail to eliminate certain facultative bacteria and yeasts found in root canal systems. In this study, standardized bovine dentin blocks infected with Enterococcus faecalis were treated with an aqueous calcium hydroxide or bioactive glass S53P4 ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200404000-00009
更新日期：2004-04-01 00:00:00
abstract：:This study assessed in vitro the diagnostic ability of cone beam computed tomography (CBCT) scans with different voxel resolutions in the detection of simulated external root resorption (ERR). For that purpose, 59 teeth were viewed through iCAT tomography (Imaging Sciences International, Inc, Hatfield, PA) following t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.11.005
更新日期：2009-02-01 00:00:00
abstract：INTRODUCTION:This in vitro study compared the performance of the XP-endo Shaper (XP; FKG, La Chaux-de-Fonds, Switzerland) in curved canals when used with a higher speed (3000 rpm) without a glide path with the manufacturer's protocol. METHODS:Twenty extracted mandibular molars with separate mesial curved canals were m...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.10.014
更新日期：2020-01-01 00:00:00
abstract：INTRODUCTION:The inferior alveolar nerve (IAN) block does not always result in successful pulpal anesthesia. Anesthetic success rates might be affected by increased anxiety. Nitrous oxide has been shown to have both anxiolytic and analgesic properties. Therefore, the purpose of this prospective, randomized, double-blin...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2012.02.010
更新日期：2012-05-01 00:00:00
abstract：INTRODUCTION:In carious teeth, transforming growth factor beta 1 (TGF-β1) is released from the dentin matrix and possibly activated in an acidic environment. Conversely, EDTA solutions with a neutral to slightly alkaline pH are used in clinics to promote cell homing in regenerative endodontic procedures. We hypothesize...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.09.015
更新日期：2019-01-01 00:00:00
abstract：INTRODUCTION:This study aimed to investigate the roles of ephrinB2 in stabilizing vascularlike structures generated by stem cells from apical papilla (SCAPs) and human umbilical vein endothelial cells (HUVECs). METHODS:HUVECs were seeded alone or with SCAPs concurrently or 12 hours later. Angiogenesis and ephrinB2 pho...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.05.012
更新日期：2016-09-01 00:00:00
abstract：:This study compared the effect of two drills and five cleaning regimens on post space debridement. One hundred extracted premolars were instrumented and obturated with warm vertical compaction of gutta percha. The teeth were divided into two groups according to the drill used to remove gutta percha/sealer and for post...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2007.10.019
更新日期：2008-01-01 00:00:00
abstract：INTRODUCTION:Cross-sectional studies describe the health status of a population and measure the prevalence of disease or treatment. Neither the prevalence of periapical radiolucency, a surrogate for disease, nor the prevalence of root canal treatment have been subjected to a systematic review, which is the highest leve...
journal_title：Journal of endodontics
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.joen.2012.05.023
更新日期：2012-09-01 00:00:00
abstract：:Sodium hypochlorite (NaOCl) has been recommended for irrigation during root canal preparation. This investigation used scanning electron microscopy to examine instrumented and uninstrumented surfaces in the middle third of root canals following the use of several concentrations of NaOCl (5.25%, 2.5%, 1.0%, and 0.5%). ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81331-2
更新日期：1992-12-01 00:00:00
abstract：:The purpose of this study was to investigate histologically and histometrically the changes in pulpal and periapical tissues after pulpal exposure in rats. All animals received a pulpal exposure in the left mandibular first molar. Animals were killed at 1 to 56 days after pulpal exposure, and their mandibles were eval...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/s0099-2399(06)80020-8
更新日期：1994-01-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to evaluate and compare the resistance to cyclic fatigue of the new One Curve (OC) instrument in double (S-shaped) and single curvature canals compared with other nickel-titanium rotary instruments. METHODS:Size 25/.06 of OC, 2Shape (TS), Vortex Blue (VB), ProFile Vortex (PV), an...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.07.023
更新日期：2018-11-01 00:00:00
abstract：:In this study the sealing ability of a new urethane methacrylate resin-based sealer, EndoRez, was evaluated using a fluid-filtration model. Sixty-four single-rooted lower bicuspids were decoronated, instrumented, and divided into 3 groups of 20 each with 4 teeth used as controls. In group A, the roots were obturated w...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200310000-00011
更新日期：2003-10-01 00:00:00
abstract：INTRODUCTION:In this study, we investigated if apical periodontitis (AP) associated with diabetes influenced the levels of endogenous antioxidants, the total antioxidant capacity (TAC), and the oxidant parameter in the serum of Wistar rats. METHODS:Forty male rats were divided into 4 equal groups: normal rats (N), rat...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2017.05.014
更新日期：2017-10-01 00:00:00
abstract：:In the past, measurement of microleakage has been based on measurement of dye or radioactive isotope penetration. A method has been developed to allow electronic monitoring of microflow in the same specimen over a period of time. This method was used to compare previously reported retrograde materials with an amalgam/...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)80072-5
更新日期：1994-11-01 00:00:00
abstract：:The purpose of this in vitro study was to evaluate the mineral contents of root-canal dentin before and after treatment with two commonly used gutta-percha solvents: chloroform and halothane. Twenty extracted human premolars, whose crowns and apical thirds had been removed, were used. Pulp tissues were removed and the...
journal_title：Journal of endodontics
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1097/00004770-200401000-00012
更新日期：2004-01-01 00:00:00
abstract：INTRODUCTION:The purpose of this study was to evaluate the push-out bond strengths of different obturating materials. METHODS:Forty single-rooted human extracted teeth were used in this study. The teeth were instrumented and irrigated by using 5.25% NaOCl, 15% ethylenediaminetetraacetic acid, and sterile water. The te...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2009.10.026
更新日期：2010-02-01 00:00:00
abstract：INTRODUCTION:This study was conducted to evaluate and compare the fracture resistance of roots obturated with various contemporary canal-filling systems. METHODS:Fifty single-rooted extracted mandibular premolars were decoronated to obtain 13-mm root segments. Ten roots were left unprepared and unfilled (negative cont...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.08.008
更新日期：2011-11-01 00:00:00
abstract：:A lack of agreement exists in the literature regarding the anatomical relationship of the mandibular canal to its surrounding structures such as the root apices. The purpose of this investigation was to study the spatial relationship of the mandibular canal to the posterior teeth in dried human mandibles. Twenty-two m...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81411-1
更新日期：1992-04-01 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：:In the present study, we investigated the effect of the addition of different grades of gum rosins and hydrogenated resins to Grossman cement on dimensional stability, solubility and disintegration. pH and conductivity, which may affect these properties, were also determined. The experiments were performed according t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(99)80284-2
更新日期：1999-07-01 00:00:00
abstract：:No information could be found in the dental literature on the hardness or strength of the materials in root canal instruments. Hardness testing is a convenient method for examining these products, and strength properties can be deduced from available strength-hardness data. The Vickers hardness of cross-sections of st...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(96)80274-3
更新日期：1996-02-01 00:00:00
abstract：:The aim of this study was to evaluate the time required by four different root canal medications coupled with the temporary filling material Cavit (ESPE, Seefeld, Germany) to prevent penetration of bacteria into the root canal. There were 145 roots prepared in a standardized manner. Four groups with 15 samples each we...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2005.10.023
更新日期：2006-02-01 00:00:00
abstract：INTRODUCTION:Squamous odontogenic tumor-like epithelial islands occurring in the walls of odontogenic cysts are histologically identical to the squamous odontogenic tumor (SOT). Microscopically, the squamous odontogenic tumor-like proliferations (SOTLPs) share certain histologic features with SOT, acanthomatous and des...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.02.010
更新日期：2011-05-01 00:00:00
abstract：INTRODUCTION:The goal of replantation after dental avulsion is to maintain the tooth in its socket. Presence of vital periodontal ligament cells on the root surface of the replanted tooth and the immunologic status of the patient are factors that protect against root resorption. It is known that dental constituents pla...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2016.09.020
更新日期：2017-01-01 00:00:00
abstract：:Intermediate Restorative Material (IRM) has been advocated as a root-end filling material based primarily on reports of clinical success and various leakage studies. The objectives of this study were to determine the excisional wound healing responses of the periradicular tissues to IRM root-end filling material and t...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(97)80201-4
更新日期：1997-01-01 00:00:00
abstract：:The purpose of this investigation was twofold: (1) to search for clinical articles pertaining to success and failure of periapical surgery and (2) to assign levels of evidence to these studies except case reports. Electronic and manual searches were conducted to identify all the literature regarding success and failur...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1097/01.don.0000133158.35394.8a
更新日期：2005-01-01 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
