Abstract：
:Thirteen teeth in human cadaver sections were accessed and #15 K-files were placed at various lengths in one root canal of each tooth. Using a positioner to ensure duplicate views, radiographs were taken with both Ultraspeed and Ektaspeed Plus X-ray film. Each of the 26 radiographs was coded and then placed in random order. Six endodontic specialists measured the distance from the file tip to the radiographic apex on each film. The results were analyzed by analysis of variance and Cronbach's generalizability theory. It was found that 94% of the variance in measurements was due to differences among the viewers, whereas 5% was due to a combination of viewers and tooth. Only 1% was due to differences between the two types of film. It was concluded that Ektaspeed Plus film may be used for working length radiographs because it requires only approximately 50% of the radiation needed for Ultraspeed film.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Brown R,Hadley JN,Chambers DWdoi
10.1016/S0099-2399(98)80216-1subject
Has Abstractpub_date
1998-01-01 00:00:00pages
54-6issue
1eissn
0099-2399issn
1878-3554pii
S0099-2399(98)80216-1journal_volume
24pub_type
杂志文章abstract：INTRODUCTION:This retrospective study aimed to analyze the effect of repairing endodontic access cavities with composite on the survival of single crowns and retainer restorations of fixed or removable dental prostheses. METHODS:Dental records of patients attending a university dental clinic were retrospectively scree...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.11.012
更新日期：2020-03-01 00:00:00
abstract：:In this retrospective study with limited cone-beam computed tomography (limited CBCT), we investigated the anatomic characteristics of the accessory mental foramina and accessory branches of the mandibular canal. The CBCT records of approximately 150 patients were evaluated, and 17 accessory mental foramina were found...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.08.033
更新日期：2008-12-01 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：INTRODUCTION:The aim of this study was to compare the efficacy of passive ultrasonic irrigation (PUI) and the EndoVac (EV) System (Discus Dental, Culver City, CA) in hard tissue debris removal and its influence on the quality of the root canal filling with the aid of micro-computed tomographic scanner. METHODS:Twenty-...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.05.001
更新日期：2015-10-01 00:00:00
abstract：:The external cervical root resorption associated with intracoronal bleaching of pulpless teeth can be a devastating lesion. It often cannot be repaired. To prevent this problem, increasing attention has been focused on placing a barrier between the pulp chamber and the endodontic filling material. The objective of thi...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/s0099-2399(06)80822-8
更新日期：1994-06-01 00:00:00
abstract：INTRODUCTION:Experimental studies show that dental pulp cells respond unfavorably to contact with resin composite restorative material. Hypothetically, in a random population, the frequency of apical periodontitis should be higher for teeth restored with resin composite than with amalgam. Therefore, the aim was to comp...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2014.05.002
更新日期：2014-09-01 00:00:00
abstract：:Endodontic microsurgery has reduced the degree of treatment trauma compared with traditional apical surgery and further increased the success rate of natural teeth retention. However, when root apices of the mandibular posterior teeth are far from the buccal cortical bone surface or near to the inferior alveolar nerve...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2020.07.033
更新日期：2020-08-11 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：: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：INTRODUCTION:This study was to investigate the effects of tricalcium silicate (Ca(3)SiO(5)) on proliferation and odontogenic differentiation of human dental pulp cells (hDPCs) in vitro. METHODS:The hDPCs were seeded in culture medium with or without Ca(3)SiO(5) extract and calcium hydroxide (Ca(OH)(2)) extract. Prolif...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.05.035
更新日期：2011-09-01 00:00:00
abstract：:Strippings are problems that are frequent on thin and concave roots. Treatment and prognosis differ from that of a lateral root perforation because of the size, oval shape, and thin edges of the striping. We propose a two-step technique: an endodontic phase in which the root canal system is sealed with gutta-percha ov...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(96)80069-0
更新日期：1996-12-01 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:Collagen dentin matrix may represent a suitable scaffold to be remineralized in the presence of bioactive materials. The purpose of this study was to determine if experimental resin cements containing bioactive fillers may modulate matrix metalloproteinase-mediated collagen degradation of etched dentin. M...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.05.011
更新日期：2012-09-01 00:00:00
abstract：INTRODUCTION:Idiopathic bone cavity (IBC) is an uncommon bone lesion that usually affects youngsters as an unilocular radiolucency with predilection for the posterior mandible. Because the lesion is frequently located in proximity to the adjacent teeth, chronic apical periodontitis is commonly included as a differentia...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2020.11.004
更新日期：2021-02-01 00:00:00
abstract：:Root canal bacteria in teeth with apical periodontitis were enumerated after extraction and incubation. Canals in 36 teeth were sampled after: S1, incubation for 2 hours (group A), 2 days (group B), 4 days (group C), and 6 days (group D); S2, subsequent incubation for 1 week; S3, canal disinfection; and S4, final incu...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.08.038
更新日期：2008-12-01 00:00:00
abstract：:Porphyromonas endodontalis (formerly Bacteroides endodontalis) is a black-pigmented anaerobic Gram-negative rod which is associated with endodontal infections. It has been isolated from infected dental root canals and submucous abscesses of endodontal origin. The presence of P. endodontalis in infected dental root can...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/s0099-2399(06)80843-5
更新日期：1992-09-01 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：:One hundred randomly selected mandibular incisors were examined to assess the prevalence and location of two canals and to describe the canal anatomy that may be encountered during apical surgery. Sections of the root were cut at 1, 2, and 3 mm from the apex, simulating a 20-degree beveled surgical resection. The sect...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(98)80120-9
更新日期：1998-09-01 00:00:00
abstract：:The sealing properties of three temporary restorative materials, Cavit, IRM, and a polycarboxylate-based cement, Ultratemp Firm, were investigated in vitro. Standardized access cavities were prepared in 45, intact, extracted, human molars. The teeth were randomly assigned to three groups and the access openings filled...
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.0000121610.63000.f2
更新日期：2004-08-01 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：:The objective of this study was to compare the effectiveness of F-files and ultrasonics to remove the smear layer from instrumented root canals when irrigated with sodium hypochlorite and EDTA. Sixty healthy human premolar teeth were instrumented with ProTaper file series to F3, and the canals were enlarged with Profi...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2008.07.006
更新日期：2008-10-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to evaluate the bond strength of different adhesive sealers on Resilon and gutta-percha. METHODS:Pellets of gutta-percha and Resilon were embedded into test tubes. Small eyelets were attached to those surfaces with a 0.5-mm film of different root canal sealers. Real Seal, Real Se...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2010.01.004
更新日期：2010-05-01 00:00:00
abstract：:Etch-and-rinse adhesives can cause vasorelaxation via mechanisms occurring in the endothelium and smooth muscle, including the release of nitric oxide (NO). This effect might promote or aggravate bleeding if such adhesives are placed inadvertently on iatrogenic pulp microexposures. The present study assessed the vasoa...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.07.019
更新日期：2008-10-01 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:Magnetic resonance imaging (MRI) has the potential to aid in determining the presence and extent of cracks/fractures in teeth because of better contrast without ionizing radiation. The objectives were to develop MRI criteria for root crack/fracture identification and to establish reliability and accuracy i...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.03.008
更新日期：2019-06-01 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 report presents a rare case of odontogenic cutaneous sinus tract caused by a vertical root fracture. The root-fractured molar was probably caused by an accidental blow by a cow 3 years ago. Despite all treatments by physicians and surgeons for nearly 1 year, the sinus tract recurred repeatedly. After diagnosis an...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/s0099-2399(06)81130-1
更新日期：1997-09-01 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：:Removing posts from root canals prior to endodontic retreatment is often a challenge. The Gonon post removing system (Thomas Extracteur De Pivots; FFDM-Pneumat, Bourges, France) is safe and efficient and can be used for anterior, bicuspid, and even molar teeth. The Gonon system is illustrated with one clinical case. ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(89)80200-6
更新日期：1989-11-01 00:00:00
abstract：:The purpose of this study was to develop a method for lidocaine detection in dental pulp by high-performance liquid chromatography. The amounts of lidocaine in dog pulps were quantitated after local injection to evaluate lidocaine recovery from pulp tissue with this technique. Comparison was also made between the amou...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200101000-00009
更新日期：2001-01-01 00:00:00
