Abstract:
AIM:To report the hydration mechanism of white mineral trioxide aggregate (White MTA, Dentsply, Tulsa Dental Products, Tulsa, OK, USA). METHODOLOGY:The chemical constitution of white MTA was studied by viewing the powder in polished sections under the scanning electron microscope (SEM). The hydration of both white MTA and white Portland cement (PC) was studied by characterizing cement hydrates viewed under the SEM, plotting atomic ratios, performing quantitative energy dispersive analyses with X-ray (EDAX) and by calculation of the amount of anhydrous clinker minerals using the Bogue calculation. RESULTS:Un-hydrated MTA was composed of impure tri-calcium and di-calcium silicate and bismuth oxide. The aluminate phase was scarce. On hydration the white PC produced a dense structure made up of calcium silicate hydrate, calcium hydroxide, monosulphate and ettringite as the main hydration products. The un-reacted cement grain was coated with a layer of hydrated cement. In contrast MTA produced a porous structure on hydration. Levels of ettringite and monosulphate were low. Bismuth oxide was present as un-reacted powder but also incorporated with the calcium silicate hydrate. CONCLUSIONS:White MTA was deficient in alumina suggesting that the material was not prepared in a rotary kiln. On hydration this affected the production of ettringite and monosulphate usually formed on hydration of PC. The bismuth affected the hydration mechanism of MTA; it formed part of the structure of C-S-H and also affected the precipitation of calcium hydroxide in the hydrated paste. The microstructure of hydrated MTA would likely be weaker when compared with that of PC.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
Camilleri Jdoi
10.1111/j.1365-2591.2007.01248.xsubject
Has Abstractpub_date
2007-06-01 00:00:00pages
462-70issue
6eissn
0143-2885issn
1365-2591pii
IEJ1248journal_volume
40pub_type
杂志文章abstract::CLINICAL TECHNIQUE: It is generally accepted that the success of root-canal treatment is mainly dependent on the proper cleaning, shaping and hermetic obturation of root canals. Obturation of the root canal is of importance as 60% of endodontic failures are attributable to incomplete obliteration of the root-canal sys...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.1999.00180.x
更新日期:1999-01-01 00:00:00
abstract:AIM:To evaluate clinically the antibacterial effects of root canal treatment procedures using molecular microbiology analyses. METHODOLOGY:Samples were taken from 14 necrotic root canals of teeth with apical periodontitis before (S1) and after instrumentation with NaOCl irrigation (S2), a final rinse with chlorhexidin...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2012.02111.x
更新日期:2013-03-01 00:00:00
abstract::This position statement on the management of deep caries and the exposed pulp represents the consensus of an expert committee, convened by the European Society of Endodontology (ESE). Preserving the pulp in a healthy state with sustained vitality, preventing apical periodontitis and developing minimally invasive biolo...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13080
更新日期:2019-07-01 00:00:00
abstract:AIM:To use the fluid transport model to evaluate the ex vivo short- and long-term microleakage along root canals filled with Gutta-flow or AH-Plus using the cold lateral compaction technique. METHODOLOGY:A total of 38 single-rooted human teeth were used for the assessment of microleakage. The crowns of the teeth were ...
journal_title:International endodontic journal
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2591.2010.01689.x
更新日期:2010-05-01 00:00:00
abstract:AIM:To examine the effects of calcium hydroxide (Ca(OH)2), transforming growth factor-beta (TGF-beta 1), and Ca(OH)2/TGF-beta 1 coadministration on TGF-beta 1 and interleukin-6 (IL-6) synthesis by early (subculture 1) and late (subculture 5) osteoblast cultures. METHODOLOGY:Early and late cultures were established usi...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2000.00326.x
更新日期:2000-09-01 00:00:00
abstract:AIM:To evaluate the response of the apical and periapical tissues of dog teeth with apical periodontitis after one-session root canal treatment with and without antimicrobial photodynamic therapy (aPDT) compared with the use of an intracanal dressing. METHODOLOGY:Sixty root canals with an induced periapical lesion wer...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12486
更新日期:2016-06-01 00:00:00
abstract:AIM:To investigate the root form and canal morphology of mandibular first molar teeth in a Taiwan Chinese population. METHODOLOGY:A total of 183 mandibular first molars were collected and examined visually through a dissecting microscope after rendering the teeth transparent. The number of roots, number of canals and ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2009.01619.x
更新日期:2009-11-01 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: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:AIM:To compare the efficacy of different solutions (1% sodium hypochlorite, 10% citric acid and 20% EDTA) in the removal of calcium hydroxide from root canals. METHODOLOGY:One hundred single-rooted maxillary incisors were prepared to size 50 and split longitudinally. Two standardized grooves were cut into the apical a...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2010.01709.x
更新日期:2010-06-01 00:00:00
abstract::The effects of varying clinically relevant patterns of anaesthetic-vasoconstrictor combinations used for periradicular surgery on plasma concentrations of catecholamines and haemodynamic responses was studied in the canine model. Five mongrel dogs were anaesthetized with sodium pentobarbitol. A femoral cannula was ins...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1996.tb01357.x
更新日期:1996-01-01 00:00:00
abstract:AIM:To assess the inflammatory potential of biofilm matrix constituents of Enterococcus faecalis and Pseudomonas aeruginosa monospecies biofilms on macrophages. METHODOLOGY:In vitro biofilms of E. faecalis and P. aeruginosa were grown (7 days) in aerobic and anaerobic conditions. The biofilm matrix components: exopoly...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13093
更新日期:2019-07-01 00:00:00
abstract:AIM:The purpose of this study was to evaluate the influence of rotational speed, torque, and operator experience with a specific Ni-Ti rotary instrumentation technique on the incidence of locking, deformation and separation of instruments. METHODOLOGY:ProFile Ni-Ti rotary instruments (PRI) sizes 40-15 with a 6% taper ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2001.00352.x
更新日期:2001-01-01 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: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:AIM:To determine the root canal morphology of mandibular first premolar teeth in an Indian population using a decalcification and clearing technique. METHODOLOGY:One hundred extracted adult mandibular first premolar teeth were studied following decalcification and clearing. The shape of the canal orifice, root canal p...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2008.01494.x
更新日期:2009-01-01 00:00:00
abstract:AIM:To introduce and assess a novel method for measuring washout resistance of cement-based dental materials, including mineral trioxide aggregate (MTA), to qualitatively verify the results with a clinical simulation and to evaluate the washout resistance of a new root-end filling material. METHODOLOGY:A method for as...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2012.02108.x
更新日期:2013-02-01 00:00:00
abstract::Teflon tubes containing freshly mixed, polymerized Hydron root canal filling material, fully set AH26 or Teflon were implanted into the mandible of guinea pigs and assessed histologically at 2 days, 1, 2, 4, 12 and 26 weeks. None of the materials tested elicited signs of overt or significant tissue damage, and polymer...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1992.tb00749.x
更新日期:1992-07-01 00:00:00
abstract::In this study, an unusual observation of Saccharomyces cerevisiae isolated from an infected root canal and from the blood of a patient undergoing endodontic therapy of a tooth with asymptomatic apical periodontitis is reported. Phenotypic (biochemical tests, antifungal susceptibility tests and SDS-PAGE of cellular pro...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.1997.00101.x
更新日期:1997-09-01 00:00:00
abstract::The purpose of this study was to compare the dentine-removing characteristics of size 25 K-files activated by the Cavi-Endo and Piezon-Endo units. The influence of power-setting, direction of file oscillation, interfacial force and operator-assisted movement were studied. Filing was performed on flat surfaces of denti...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1993.tb00539.x
更新日期:1993-01-01 00:00:00
abstract:AIM:To compare in vitro the cleanliness of root canal walls in oval-shaped root canals following automated or manual instrumentation. METHODOLOGY:Forty-five oval-shaped single-rooted maxillary and mandibular premolars with straight canals were divided into three groups of 15. Automated canal preparation was performed ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2005.00938.x
更新日期:2005-06-01 00:00:00
abstract:AIM:To compare the area occupied by gutta-percha, sealer, or void in standardized .06 tapered prepared simulated curved canals and in mesio-buccal canals of extracted maxillary first molars filled with a single .06 gutta-percha point and sealer or lateral condensation of multiple .02 gutta-percha points and sealer. ME...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2004.00903.x
更新日期:2005-02-01 00:00:00
abstract::The aim of this in vitro study was to determine the effect of removal of the smear layer on canal obturation as measured by penetration of bacteria from a coronal direction. One hundred and twenty extracted human teeth with straight, single root canals were decoronated. The canals were prepared using the modified doub...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1996.tb01376.x
更新日期:1996-07-01 00:00:00
abstract:AIM:To determine the influence of various irrigating solutions on the accuracy of the electronic apex locator facility in the Tri Auto ZX handpiece. METHODOLOGY:One hundred and forty teeth with single canals and mature apices, scheduled for extraction for either periodontal or prosthetic reasons in 76 patients were us...
journal_title:International endodontic journal
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2591.2007.01234.x
更新日期:2007-05-01 00:00:00
abstract:AIM:To assess the influence of cusp reduction and coverage with composite resin on the fracture resistance of premolars with prepared access cavities. METHODOLOGY:Endodontic access cavities were prepared in 60 premolar teeth that were divided into four test groups: R1, R2, R3 and NR (n=15). In all test groups, MOD cav...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2011.01859.x
更新日期:2011-06-01 00:00:00
abstract::Irrigation solutions and intracanal medicaments are used within the root canal to clean and aid in disinfecting the dentinal walls. Although these materials are intended to be contained within the root canal, they invariably contact the periapical tissues, either through inadvertent extrusion through the apex or leach...
journal_title:International endodontic journal
pub_type: 杂志文章,评审
doi:10.1046/j.1365-2591.2003.00631.x
更新日期:2003-02-01 00:00:00
abstract:AIM:To evaluate the bond strength of a resin-based sealer (AH Plus) to root canal dentine after the removal of a zinc oxide-eugenol-based sealer (Endofill), using different retreatment techniques. METHODOLOGY:The root canals of sixty-four maxillary incisors were prepared with ProTaper and filled with Endofill/gutta-pe...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12170
更新日期:2014-05-01 00:00:00
abstract:AIM:To analyse several physicochemical properties of AH Plus (Dentsply DeTrey, Konstanz, Germany), including setting time, flow, radiopacity and the degree of conversion (DC); and to correlate the results with the source of the material: from the beginning, middle or end of the tubes in which they were supplied. METHO...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2012.02049.x
更新日期:2012-10-01 00:00:00
abstract:AIM:To evaluate the apical extrusion of debris associated with several root canal preparation systems in vitro. METHODOLOGY:Forty-five extracted human mandibular premolars with single canals and similar lengths were used. The root canals were instrumented using ProTaper Next (Dentsply Maillefer, Ballaigues, Switzerlan...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12369
更新日期:2015-07-01 00:00:00
abstract:AIM:To evaluate ex vivo the incidence of defects in root dentine before and after root canal preparation and filling. METHODOLOGY:Eighty extracted mandibular premolars were divided equally in four groups. Group 1 was left unprepared. All other root canals were prepared using Gates Glidden drills and System GT files up...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2008.01502.x
更新日期:2009-03-01 00:00:00