Abstract:
AIM:The aim of this study was to determine the influence of the width of apical root canals and the depth of heat application during warm vertical compaction on the percentage of gutta-percha-filled area (PGFA) in the apical root canal. METHODOLOGY:Two groups of extracted human canines (total 60) were instrumented and filled with vertically compacted warm gutta-percha up to the apical foramen (AF). Using the Touch 'n Heat device heat was applied 4 mm from the AP in one group and 2 mm in the other. The number of teeth with gutta-percha extrusion was recorded. A horizontal section was cut 1.5 mm from the AF of each tooth. The cross-sectional area of the canal and the gutta-percha was measured using an image-analysis programme. The PGFA was then calculated. Multiple linear regression was performed to investigate the association between the experimental variables and the PGFA, and the occurrence of gutta-percha extrusion. RESULTS:A significant association was seen between the depth of heat application and the PGFA (P= 0.000), and between the canal area and the PGFA (P= 0.038). The average PGFA reached 96.1% when heated to 2 mm, as compared with 87.0% when heated to 4 mm. PGFAs were lower in wide apical canals than in small canals. Gutta-percha extruded in seven teeth (12%) and was independent of experimental variables. CONCLUSIONS:After warm vertical compaction, the quality of adaptation of gutta-percha to the wall of the apical root canal varies; the influencing factors in this study were the depth of heat application and the width of the apical root canal.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
Wu M-,van der Sluis LW,Wesselink PRdoi
10.1046/j.1365-2591.2002.00522.xkeywords:
subject
Has Abstractpub_date
2002-06-01 00:00:00pages
527-35issue
6eissn
0143-2885issn
1365-2591pii
522journal_volume
35pub_type
杂志文章abstract:AIM:To determine how instrument design affects the fatigue life of two nickel-titanium (Ni-Ti) rotary systems (Mtwo and ProTaper) under cyclic fatigue stress in simulated root canals. METHODOLOGY:Cyclic fatigue testing of instruments was performed in stainless steel artificial canals with radii of curvature of 2 or 5 ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2006.01143.x
更新日期:2006-10-01 00:00:00
abstract::Models which simulate oral conditions pertaining to endodontic surgical procedures are most suitable if they contain natural teeth and have hard and soft tissues which handle realistically. In addition, the model should possess radiological characteristics similar to bone. A simple custom-built model which fulfils the...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:
更新日期:1993-05-01 00:00:00
abstract:AIM:The aim of this study is to test the hypothesis that more patients with failed root-canal treatment or other endodontic problems are referred for periradicular surgery rather than nonsurgical re-treatment. METHODOLOGY:Three sets of 100 periapical radiographs representing typical cases referred for surgical treatme...
journal_title:International endodontic journal
pub_type: 杂志文章,多中心研究
doi:10.1046/j.1365-2591.2002.00510.x
更新日期:2002-05-01 00:00:00
abstract:PURPOSE:The aim of this study was to answer the question: For patients requiring apicoectomy (apicectomy/root-end resection) and retrograde (root-end) obturation (filling), which retrograde obturation (root-end filling) material(s) is/are the most effective, as determined by reduction in periapical radiolucency and eli...
journal_title:International endodontic journal
pub_type: 杂志文章,meta分析,评审
doi:10.1046/j.1365-2591.2003.00696.x
更新日期:2003-09-01 00:00:00
abstract::Animal testing is crucial in situations when research on humans is not allowed because of unknown health risks and ethical concerns. The current project aims to develop reporting guidelines exclusively for animal studies in Endodontology, using an established consensus-based methodology. The guidelines have been named...
journal_title:International endodontic journal
pub_type: 杂志文章,评审
doi:10.1111/iej.13477
更新日期:2021-01-15 00:00:00
abstract:AIM:To determine whether nisin, a bacteriocin, would be effective at killing Enterococcus faecalis and Streptococcus gordonii cells in solution and within the root canal system. METHODOLOGY:Bacterial isolates of E. faecalis and S. gordonii were grown from glycerol stocks in closed tubes containing BHY broth at 37 degr...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2004.00846.x
更新日期:2004-10-01 00:00:00
abstract:AIM:To assess the success rate of the root-end filling material, Mineral Trioxide Aggregate (MTA). METHODOLOGY:Referred adult patients were recruited using strict entry criteria and randomly allocated to receive MTA or IRM. A standardized surgical technique was employed: the root end was resected perpendicularly and a...
journal_title:International endodontic journal
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1365-2591.2003.00682.x
更新日期:2003-08-01 00:00:00
abstract::The objective of this study was to compare the adaptation of mechanically softened gutta-percha to the root canal wall in the presence and absence of smear layer. The root canals of 20 freshly extracted human maxillary incisors were cleaned and shaped. Prior to obturation, 10 root canals were irrigated with 20 ml of 5...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1995.tb00312.x
更新日期:1995-09-01 00:00:00
abstract:AIM:To compare dentinal microcrack formation whilst using Ni-Ti hand K-files, ProTaper hand and rotary files and the WaveOne reciprocating file. METHODOLOGY:One hundred and fifty mandibular first molars were selected. Thirty teeth were left unprepared and served as controls, and the remaining 120 teeth were divided in...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12197
更新日期:2014-07-01 00:00:00
abstract:AIM:To evaluate the impact of activated platelets on the mitogenic expansion of human dental pulp-derived cells (DPC) in vitro. METHODOLOGY:The effect of supernatants released from activated platelets (PRS) and the corresponding platelet membranes (MEM) on proliferation and protein synthesis of DPC was evaluated. The ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2009.01650.x
更新日期:2010-02-01 00:00:00
abstract:AIM:To evaluate the physicochemical and mechanical properties of Portland cement-based experimental sealers (ES) with different radiopacifying agents (zirconium oxide and niobium oxide micro- and nanoparticles) in comparison with the following conventional sealers: AH Plus, MTA Fillapex and Sealapex. METHODOLOGY:The m...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12167
更新日期:2014-05-01 00:00:00
abstract::The purpose of this investigation was to study the effects of a Nd:YAG laser on the cut surface of teeth using scanning electron microscopy (SEM). Eighteen single-rooted teeth were cleaned, shaped, and obturated with gutta-percha and root canal sealer. The apical 3 mm of each tooth were resected with a diamond fissure...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1992.tb00758.x
更新日期:1992-11-01 00:00:00
abstract::In an effort to simulate the infected dental root canal, bacteria were enclosed in polyethylene tubes that were subcutaneously implanted into rats. Four different bacterial combinations, selected from nine oral species, were tested. The contents of 144 inoculated and implanted 'root canals' were analysed after 2 and 4...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1989.tb00931.x
更新日期:1989-11-01 00:00:00
abstract:AIM:To report the use of cone beam computed tomography in the assessment of external cervical resorption lesions. SUMMARY:Asymptomatic external cervical resorption lesions were diagnosed radiographically in two patients. Clinical examination in both cases was unremarkable. Cone beam computed tomography scans revealed ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2007.01247.x
更新日期:2007-09-01 00:00:00
abstract:AIM:This study evaluated the effects of different root canal sealers on the bond strength of a fibreglass post cemented with self-adhesive resin cements. METHODOLOGY:The root canals of 50 extracted maxillary single-rooted canine teeth were prepared with the crown-down technique and randomly divided into five groups ac...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2010.01831.x
更新日期:2011-04-01 00:00:00
abstract:AIM:To evaluate the influence of thermomechanical compaction (Tagger's hybrid technique - THT) on the push-out strength of several root filling materials to root dentine. METHODOLOGY:Root canals of eighty roots in human canines were prepared with the ProTaper system and filled with one of the following materials, usin...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2012.02039.x
更新日期:2012-09-01 00:00:00
abstract:AIM:To investigate the prevalences of four Treponema species in primary root canal infections using a nested PCR assay. METHODOLOGY:Samples were obtained from 32 infected root canals. Twenty-two cases showed chronic asymptomatic periradicular lesions and 10 symptomatic cases were diagnosed as acute apical periodontiti...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.0143-2885.2003.00607.x
更新日期:2003-01-01 00:00:00
abstract:AIM:To assess and compare the resistance to cyclic fatigue, torsional stress, bending and buckling of ProGlider (PG; Dentsply Maillefer, Ballaigues, Switzerland) instruments with PathFile (PF; Dentsply Maillefer) pathfinding nickel-titanium rotary instruments. METHODOLOGY:Size 16, .02 taper PG and PF instruments were ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12386
更新日期:2015-09-01 00:00:00
abstract:AIM:To compare the fracture resistance of roots filled with different materials. METHODOLOGY:Thirty-four freshly extracted human maxillary central incisor teeth with similar dimension were selected. Crowns were sectioned at the cemento-enamel junction, and the length of the roots were adjusted to 13 mm. Following the ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2006.01177.x
更新日期:2007-01-01 00:00:00
abstract:AIMS:The aims of this study were to investigate the pattern of transmission of laser light through carious human molar teeth, and to examine the effect on light transmission of reactions to caries in the dentine. METHODOLOGY:Sectioned carious human molars were examined whilst illuminated from their external surfaces b...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2001.00428.x
更新日期:2001-10-01 00:00:00
abstract:AIM:To evaluate the torsional properties of the NiTi glide path reciprocating instruments R-Pilot (VDW, Munich, Germany) and WaveOne Gold Glider (Dentsply Sirona, Ballaigues, Switzerland). METHODOLOGY:Ten R-Pilot (size 12.5, .04 taper) and 10 WaveOne Gold Glider (size 15, .02v taper) instruments were used. The torque ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13068
更新日期:2019-06-01 00:00:00
abstract:AIM:To compare the toxicity of methacrylate resin-based root canal sealers with sealers based on epoxy resin and silicone by two-well established cell culture methods. METHODOLOGY:Specimens of AH Plus, EndoREZ, RoekoSeal and Epiphany were prepared for direct contact in the Millipore filter diffusion test and as extrac...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2007.01321.x
更新日期:2008-01-01 00:00:00
abstract:AIM:To report a case of reparative bone-like tissue formation in the tooth of a patient with systemic sclerosis. SUMMARY:A 58-year-old Japanese female patient with systemic sclerosis was referred because of tooth fracture. Cone beam computerized tomography (CBCT) revealed multiple root resorption and the unclear trans...
journal_title:International endodontic journal
pub_type:
doi:10.1111/iej.12914
更新日期:2018-09-01 00:00:00
abstract:AIM:To engineer systems using polyisoprene (PI) or polycaprolactone (PCL) and nanometric bioactive glass 45S5 (BG) that could create a hydroxyapatite interface and thus ultimately make the use of an endodontic sealer unnecessary. METHODOLOGY:Different composites using PI or PCL as matrix material were prepared with BG...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2010.01772.x
更新日期:2010-11-01 00:00:00
abstract::The aim of designing and fabricating the surgical templates was to assist the surgical component of premolar transplantation, by establishing and replicating the root dimensions of the donor premolar tooth. The correct template could be used to assess the socket preparation (width and depth) prior to placement of the ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2012.02077.x
更新日期:2012-11-01 00:00:00
abstract::Root-canal-filling materials are either placed directly onto vital periapical tissues or may leach through dentine. The tissue response to these materials therefore becomes important and may influence the outcome of endodontic treatment. This paper is a review of the biocompatibility of contemporary orthograde and ret...
journal_title:International endodontic journal
pub_type: 杂志文章,评审
doi:10.1046/j.1365-2591.2003.00637.x
更新日期:2003-03-01 00:00:00
abstract:AIM:The aim of the present study was to identify periapical changes 20-27 years after root-canal treatment. METHODOLOGY:The periapical condition of 265 roots filled by undergraduate students was evaluated in two series of intraoral radiographs taken 10-17 and 20-27 years after treatment. Roots (72) not recorded with a...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2002.00568.x
更新日期:2002-09-01 00:00:00
abstract:AIM:To determine the pain experienced by patients during root canal treatment and to correlate with age and gender, pulpal diagnosis, previous periapical status, dental characteristics and length of treatment. METHODOLOGY:One hundred and seventy-six patients (68 men and 108 women), with ages ranged from 6 to 83 years,...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2009.01562.x
更新日期:2009-07-01 00:00:00
abstract:AIM:To evaluate the shank-to-flute ratio in rotary nickel-titanium (Ni-Ti) instruments. METHODOLOGY:The cutting portion of 15 size 30 Ni-Ti rotary instruments, ProFile.04, ProFile.06, Pow R.02, Pow R.04 and Quantec series 2000, were examined. The handles of the instruments were fixed to a bench and supported by a remo...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2004.00755.x
更新日期:2004-06-01 00:00:00
abstract:AIM:To assess the effect of acid-etching duration time on the compressive strength, microstructure and shear bond strength of All-Bond Universal adhesive to MTA-Angelus (AMTA), and Biodentine (BD). METHODOLOGY:Forty-eight cylindrical specimens (4 mm in diameter, 6 mm in height) of AMTA in four groups and 48 specimens ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13026
更新日期:2019-04-01 00:00:00