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International Endodontic Journal

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https://www.readbyqxmd.com/read/28796346/fracture-of-nickel-titanium-rotary-instrument-during-root-canal-treatment-and-re-treatment-a-5-year-retrospective-study
#1
K Alfouzan, A Jamleh
AIM: To evaluate retrospectively the incidence of K3 nickel titanium rotary instrument fracture in referred cases during root canal treatment and re-treatment. METHODOLOGY: Clinical and radiographic reports of 12867 endodontic cases treated at the King Abdulaziz medical city between January 2010 and November 2015 were reviewed to obtain information on intra-canal fractured instruments with respect to the treatment performed, tooth type, and the size and at what level the instrument fractured (coronal, middle or apical)...
August 10, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28746776/external-cervical-resorption-a-three-dimensional-classification
#2
S Patel, F Foschi, F Mannocci, K Patel
This paper describes a novel 3-dimensional classification for external cervical resorption (ECR). The European Society of Endodontology and American Association of Endodontists & American Academy of Oral & Maxillofacial Radiology position statements advise that CBCT should be considered for the assessment and/or management of root resorption if it appears to be clinically amenable to treatment following clinical and conventional radiographic examination. The new classification takes into account the ECR lesion height (1: At CEJ level or coronal to the bone crest (supracrestal), 2: Extends into the coronal-third of the root and apical to the bone crest (subcrestal), 3: Extends into the mid-third of the root, 4: Extends into the apical-third of the root), circumferential spread (A: ≤ 90° B: ≤180° C: ≤270° D: >270°) and proximity to the root canal (d: Lesion confined to dentine, p: Probable pulpal involvement), thus classifying ECR in 3-dimensions...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28746745/apical-stress-distribution-under-vertical-compaction-of-gutta-percha-and-occlusal-loads-in-canals-with-varying-apical-sizes-a-3-dimensional-finite-element-analysis
#3
K Yuan, C Niu, Q Xie, W Jiang, L Gao, R Ma, Z Huang
AIM: To investigate and compare the effects of two apical canal instrumentation protocols on apical stress distributions at the root apex under vertical compaction of gutta-percha and occlusal loads using finite element analysis. METHODOLOGY: Three finite element analysis models of a mandibular first premolar were reconstructed: an original canal model, a size 35, 0.04 taper apical enlargement model and a Lightspeed size 60 apical enlargement model. A 15 N compaction force was applied vertically to the gutta-percha 5 mm from the apex...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28744872/antibiotic-prescription-for-endodontic-infections-a-survey-of-brazilian-endodontists
#4
M R Bolfoni, F G Pappen, T Pereira-Cenci, R C Jacinto
AIM: To investigate antibiotic prescribing habits reported by Brazilian Endodontists in specific clinical situations. METHODOLOGY: Brazilian endodontists (n=13,853) were invited to answer an on-line questionnaire. The questionnaire consisted of two parts: the first part contained personal data such as age, gender, years of experience and location of endodontic practice; the second part included questions regarding dentists' behavior when prescribing antibiotics in dental practice...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28744859/lateral-and-axial-cutting-efficiency-of-instruments-manufactured-with-conventional-nickel-titanium-and-novel-gold-metallurgy
#5
R A Vasconcelos, A Arias, O A Peters
AIM: To isolate the effect of metallurgy in lateral and axial cutting efficacy against plastic and bovine dentine substrates by comparing two rotary systems with identical design but manufactured with either conventional nickel-titanium or heat-treated gold alloy. METHODOLOGY: A total of 258 ProTaper Universal (PTU) and ProTaper Gold (PTG) Shaping instruments were used. Bending behaviour was assessed to determine the appropriate displacement associated with a 2 N force in lateral cutting...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28708251/efficacy-of-photon-initiated-photoacoustic-streaming-on-apically-extruded-debris-with-different-preparation-systems-in-curved-canals
#6
D Arslan, A Kustarci
AIM: To determine the effect of photon-initiated photoacoustic streaming (PIPS) on the extrusion of debris using multiple-file (ProTaper Next-PTN) and single-file (One Shape-OS) continuous rotary systems in curved canals in human molar teeth. METHODOLOGY: Sixty extracted maxillary first molar teeth with curved mesial roots, mature apices and of similar lengths were selected. Teeth having canals with apical diameters larger than size 15 were discarded. The teeth were randomly divided into four experimental groups (n = 15 teeth per group) according to the file used and irrigation systems: (i) OS with PIPS with a 2940 nm Er:YAG laser (0...
July 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28708240/comparative-analysis-of-general-dental-practitioners-fees-and-scheduled-fees-for-root-canal-treatment-and-coronal-restorations-in-the-adult-population-of-sweden-a-five-year-follow-up-of-data-from-the-swedish-dental-register
#7
E Wigsten, T Kvist, V S Dawson, P-E Isberg, H Fransson
AIM: To investigate the fees charged by Swedish dentists for root fillings, coronal restorations and further dental interventions during a follow-up period of 5-6 years. METHODOLOGY: A total of 248,299 root fillings were linked with the tooth, the patient and the provider and entered into the Swedish Social Insurance Agency register in 2009. The data register also recorded the subsidy-based (scheduled) fee and the fee actually charged for the root fillings. Fees charged for direct or indirect coronal restorations and additional interventions during the follow-up period were also recorded...
July 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28700083/torsional-resistance-of-xp-endo-shaper-at-body-temperature-compared-with-several-nickel-titanium-rotary-instruments
#8
A M Elnaghy, S E Elsaka
AIM: To compare the torsional resistance of XP-endo Shaper (XPS; size 30, .01 taper, FKG Dentaire, La Chaux-de-Fonds, Switzerland) instruments at body temperature with TRUShape (TRS; size 30, .06 taper, Dentsply Tulsa Dental Specialties, Tulsa, OK, USA), ProFile Vortex (PV; size 30, .04 taper, Dentsply Tulsa Dental Specialties) and FlexMaster (FM; size 30, .04 taper, VDW GmbH, Munich, Germany) nickel-titanium rotary instruments. METHODOLOGY: A metal block with a square-shaped mould (5 mm × 5 mm × 5 mm) was positioned inside a glass container...
July 12, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28675449/evaluation-of-the-accuracy-of-nine-electronic-apex-locators-by-using-micro-ct
#9
T Connert, M S Judenhofer, M Hülber-J, S Schell, J G Mannheim, B J Pichler, C Löst, A ElAyouti
AIM: To determine the accuracy of locating the apical constriction using apex locators. METHODOLOGY: Extracted teeth were micro-CT scanned preoperatively to localize the apical constriction. Electronic length measurements of 91 root canals were made using nine electronic apex locators (EAL) connected to a mounting model. Distances from the major foramen were recorded at each scale bar of the EALs, and a file was fixed in the canal at a position indicated by each EAL to be the apical constriction...
July 4, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28667765/the-effects-of-2-hydroxyethyl-methacrylate-on-matrix-metalloproteinases-2-and-9-in-human-pulp-cells-and-odontoblast-like-cells-in-vitro
#10
S Sun, G-L Wang, Y Huang, H Diwu, Y-C Luo, J Su, Y-H Xiao
AIM: To assess the effects of 2-hydroxyethyl methacrylate (HEMA) on proliferation and migration of human pulp cells, as well as on matrix metalloproteinase (MMP-2 and MMP-9) expression in human odontoblast-like cells, contributing to the goal of determining the relationship between resin materials and MMP activity in pulp-dentine complexes. METHODOLOGY: Dental pulp cell cultures were established from pulp tissue of human teeth extracted for orthodontic purposes...
July 1, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28667754/mta-induced-notch-activation-enhances-the-proliferation-of-human-dental-pulp-cells-by-inhibiting-autophagic-flux
#11
W Qiu, B Sun, F He, Y Zhang
AIM: To determine the roles of autophagy and Notch signalling in mineral trioxide aggregate (MTA)-mediated proliferation and differentiation of human dental pulp cells (hDPCs). METHODOLOGY: hDPCs were separated from human healthy molar teeth using collagenase I/dispase II digestion, and then cultured in α-MEM medium with 15% foetal bovine serum. hDPCs were seeded in 96-well plates, and cell counting kit assays were carried out to test their viability. Real-time quantitative polymerase chain reaction (qPCR) was used to evaluate ALP, Runx2, Notch1, Hes1, and Hey1 mRNA levels...
July 1, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28667674/micro-ct-assessment-of-the-shaping-ability-of-four-root-canal-instrumentation-systems-in-oval-shaped-canals
#12
M L Zuolo, A A Zaia, F G Belladonna, E J N L Silva, E M Souza, M A Versiani, R T Lopes, G De-Deus
AIM: To compare the shaping ability of four root canal instrumentation systems in oval-shaped canals using micro-computed tomographic analysis. METHODOLOGY: Forty anatomically matched mandibular incisors were scanned and assigned to four groups (n = 10), according to the canal preparation protocol: BioRace, Reciproc, Self-Adjusting File (SAF) and TRUShape systems. After canal instrumentation, the specimens were re-scanned and the registered pre- and postoperative datasets were examined to evaluate the percentages of accumulated hard-tissue debris, untouched canal areas and dentine removed...
July 1, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28665514/microguided-endodontics-a-method-to-achieve-minimally-invasive-access-cavity-preparation-and-root-canal-location-in-mandibular-incisors-using-a-novel-computer-guided-technique
#13
T Connert, M S Zehnder, M Amato, R Weiger, S Kühl, G Krastl
AIM: To present a novel miniaturized and minimally invasive treatment approach for root canal localization in mandibular incisors with pulp canal calcification and apical periodontitis. SUMMARY: A 51-year-old male patient presented with pain from his mandibular incisors. The patient had a history of severe dental trauma over 30 years ago. Both mandibular central incisors (teeth 31, 41) were tender to percussion and had a yellowish discoloration. They did not respond to thermal and electrical sensitivity tests...
June 30, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28656722/formation-of-spheroids-by-dental-pulp-derived-cells-in-the-presence-of-hypoxia-and-hypoxia-mimetic-agents
#14
K Janjić, B Lilaj, A Moritz, H Agis
AIM: To evaluate the impact of hypoxia and hypoxia mimetic agents (HMA) on the formation and activity of spheroids by dental pulp-derived cells (DPC). METHODOLOGY: DPC on agarose-coated plates were treated with hypoxia and the HMA dimethyloxallyl glycine (DMOG), desferrioxamine (DFO) and L-mimosine (L-MIM). Images of spheroids were taken directly after seeding and at 6h and 24h. Spheroid sizes were quantified by area measurement with ImageJ software. Viability was assessed with Live-Dead staining, MTT and resazurin-based toxicity assay...
June 28, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28654211/cleaning-lateral-morphological-features-of-the-root-canal-the-role-of-streaming-and-cavitation
#15
J P Robinson, R G Macedo, B Verhaagen, M Versluis, P R Cooper, L W M van der Sluis, A D Walmsley
AIM: To investigate the effects of ultrasonic activation file type, lateral canal location and irrigant on the removal of a biofilm-mimicking hydrogel from a fabricated lateral canal. Additionally, the amount of cavitation and streaming was quantified for these parameters. METHODOLOGY: An intracanal sonochemical dosimetry method was used to quantify the cavitation generated by an IrriSafe 25 mm length, size 25 file inside a root canal model filled with filtered degassed/saturated water or three different concentrations of NaOCl...
June 27, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28653761/a-prospective-clinical-study-of-regenerative-endodontic-treatment-of-traumatized-immature-teeth-with-necrotic-pulps-using-bi-antibiotic-paste
#16
H Nazzal, K Kenny, A Altimimi, J Kang, M S Duggal
AIM: To evaluate the treatment outcomes of a revitalization endodontic technique (RET) for the management of traumatized immature teeth with necrotic pulps in children. METHODOLOGY: Fifteen healthy children (age range = 7-10 years) with traumatized immature maxillary incisors with necrotic pulps treated with bi-antibiotic revitalization endodontic technique were prospectively assessed over approximately two years (mean = 22 months). One operator undertook all treatments, clinical reviews and standardized radiographic exposures with radiographic analysis being carried out by two calibrated experienced clinicians...
June 27, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28653756/a-zinc-oxide-modified-hydroxyapatite-based-cement-facilitated-new-crystalline-stoichiometric-and-amorphous-apatite-precipitation-on-dentine
#17
M Toledano, M C Pérez-Álvarez, F S Aguilera, E Osorio, I Cabello, M Toledano-Osorio, R Osorio
AIM: To evaluate the remineralization ability of two endodontic sealer cements. METHODOLOGY: Mid-coronal dentine surfaces were subjected to: i) 37% phosphoric acid (PA) or ii) 0.5 M ethylenediaminetetraacetic acid (EDTA) conditioning prior to the application of two experimental hydroxyapatite-based cements, containing sodium hydroxide (calcypatite) or zinc oxide (oxipatite), respectively. Samples were stored in simulated body fluid for 24 h or 21 d. Remineralization of the dentine surfaces were studied by Raman spectroscopy (mapping with K-means cluster and hierarchical cluster analysis) was undertaken were done...
June 27, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28650522/full-text-publication-rates-of-research-abstracts-presented-at-the-european-society-of-endodontology-ese-congresses-in-the-last-20-years
#18
G N Tzanetakis, N Tzimpoulas, S Floratos, A Agrafioti, E G Kontakiotis, H Shemesh
AIM: To evaluate the full-text publication rates of scientific research abstracts presented at the European Society of Endodontology (ESE) Congresses held between 1993 and 2013 (a total of 11 occasions) and to determine factors associated with the manuscripts. METHODOLOGY: An electronic database search was conducted from January 2015 to December 2016 to identify full text English written publications of the research abstracts presented at the last 11 ESE Biennial Congresses from 1993 to 2013...
June 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28649791/bioactivity-and-biomineralization-ability-of-calcium-silicate-based-pulp-capping-materials-after-subcutaneous-implantation
#19
G Hinata, K Yoshiba, L Han, N Edanami, N Yoshiba, T Okiji
AIM: To evaluate the abilities of three calcium silicate-based pulp-capping materials (ProRoot MTA, TheraCal LC, and a prototype tricalcium silicate cement) to produce apatite-like precipitates after being subcutaneously implanted into rats. METHODOLOGY: Polytetrafluoroethylene tubes containing each material were subcutaneously implanted into the backs of Wistar rats. At 7, 14, and 28 days post-implantation, the implants were removed together with the surrounding connective tissue, and fixed in 2...
June 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28644527/an-audit-on-technical-quality-of-root-fillings-performed-by-undergraduate-students
#20
W Fong, O Heidarifar, S Killough, M Lappin, I A El Karim
AIM: To evaluate radiographically the technical quality of root fillings performed by undergraduate dental students and to assess whether students were exposed to an appropriate endodontic case mix during their clinical training. METHODOLOGY: A retrospective audit was undertaken evaluating the clinical records of patients who underwent endodontic procedures during the period from September 2015 to June 2016 in the Dental School at Queen's University Belfast, UK...
June 23, 2017: International Endodontic Journal
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