Abstract：
:The purpose of this study was to evaluate the influence of Hero 642 rotary Ni-Ti instruments driven at 300, 400, or 600 rpm on root canal straightening, loss of working length, and instrument breakage. Sixty mesial root canals from extracted human mandibular molars were divided into 3 groups of 20 each and were instrumented at the aforementioned rotational speeds with a crown-down technique. Using a digital intraoral radiography system directly on the images of pre- and postoperative radiographs, degrees of canal curvatures were measured and recorded. Statistical analysis showed that final canal curvatures and working lengths were significantly reduced compared with those of original values in each group (p < 0.001). However, using Hero 642 rotary Ni-Ti system at different rotational speeds had no effect on canal curvature and working length alterations (p > 0.05). No file breakage was observed in any of the groups.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Karagöz-Küçükay I,Ersev H,Engin-Akkoca E,Küçükay S,Gürsoy Tdoi
10.1097/00004770-200307000-00005keywords:
subject
Has Abstractpub_date
2003-07-01 00:00:00pages
447-9issue
7eissn
0099-2399issn
1878-3554pii
S0099-2399(05)60406-2journal_volume
29pub_type
杂志文章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：:This report describes the case of a patient with mesenchymal chondrosarcoma in the region of tooth #18 that mimicked apical periodontitis. Forty-five days after endodontic treatment, gingival swelling and intense pain were observed. The endodontist suspected a furcation lesion, and the treatment option that the patien...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2008.08.016
更新日期：2008-11-01 00:00:00
abstract：INTRODUCTION:The aim of the present study was to investigate the impact of ambient temperature on the life span of nickel-titanium (NiTi) files. METHODS:Cyclic fatigue testing of NiTi instruments was performed in a stainless steel artificial canal. During the experiment, 4 different temperatures (0°C, 20°C, 35°C, and ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.06.006
更新日期：2018-10-01 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：INTRODUCTION:Dens invaginatus is a critical condition for endodontic treatment once it frequently presents a complex internal anatomy and might be associated with incomplete root and apical development. METHODS:Three cases of dens invaginatus with open apex in maxillary lateral incisors are presented. In the first cas...
journal_title：Journal of endodontics
pub_type： 杂志文章,评审
doi：10.1016/j.joen.2010.02.002
更新日期：2010-06-01 00:00:00
abstract：INTRODUCTION:Platelet-rich plasma (PRP) has been widely used in regenerative dentistry for over 2 decades. Nevertheless, previous studies have shown that its growth factor content is released over a short time period, and the application of anticoagulants limits its regenerative potential. Therefore, a second-generatio...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.04.002
更新日期：2019-08-01 00:00:00
abstract：INTRODUCTION:Fractured endodontic files present a major problem. A novel method has been proposed to retrieve fractured nickel-titanium (NiTi) endodontic files by using electrochemical dissolution. However, the effect of file dissolution on adjacent soft tissues such as the periodontal ligament (PDL) has not been inves...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.12.013
更新日期：2013-05-01 00:00:00
abstract：:A case report is presented describing the treatment for endemic dental fluorosis. Six maxillary anterior teeth were treated, three with an acid-bleach combination technique and three with an acid technique. No clinical differences was noted in treatment time or esthetic results. ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81703-6
更新日期：1991-07-01 00:00:00
abstract：INTRODUCTION:The purpose of this study was to evaluate the effect of low-surface tension EDTA solutions on the push-out bond strength of resin-based sealer to young and old root canal dentin. METHODS:Root canals from 64 (n = 32 age <30 years old and n = 32 >60 years old) extracted, decoronized, single-rooted human tee...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2017.09.007
更新日期：2018-03-01 00:00:00
abstract：:The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2005.10.013
更新日期：2006-01-01 00:00:00
abstract：INTRODUCTION:The purpose of this prospective, randomized, single-blind crossover study was to evaluate the anesthetic efficacy of a combination palatal and buccal infiltration of the maxillary first molar. MATERIALS AND METHODS:Using a crossover design, 40 subjects received two sets of maxillary first molar infiltrati...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2011.01.005
更新日期：2011-04-01 00:00:00
abstract：:This study examined the effects of calcium-depleting endodontic irrigants, ethylenediamine tetra-acetic acid (EDTA) and BioPure MTAD, on the dissolution, surface characteristics, and ultrastructural characteristics of white mineral trioxide aggregate (MTA). The latter was mixed in a 0.35 water-cement ratio, condensed ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2006.12.002
更新日期：2007-04-01 00:00:00
abstract：INTRODUCTION:The purpose of this in vitro study was to compare the cytotoxicity of white mineral trioxide aggregate cement (AMTA, MTA-Angelus), Brasseler Endosequence Root Repair Putty (ERRM), Dycal, and Ultra-blend Plus (UBP) by using human dermal fibroblasts and a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.11.012
更新日期：2012-03-01 00:00:00
abstract：INTRODUCTION:Anesthetic efficacy of inferior alveolar nerve block decreases in patients with irreversible pulpitis. It was hypothesized that premedication with nonsteroidal anti-inflammatory drugs might improve the success rates in patients with inflamed pulps. METHODS:Sixty-nine adult volunteers who were actively exp...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2009.11.010
更新日期：2010-03-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to investigate the influence of apical filling material and the modification made to the apical preparation design in surgical endodontics on the areas of stress concentration in the mesial root of a mandibular molar using finite element analysis. METHODS:The filling material was...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2019.12.007
更新日期：2020-04-01 00:00:00
abstract：:With the recent influx of osseointegrated endosseous implants in dentistry, attention has been drawn away from using endodontic stabilizers as a means of stabilizing and retaining teeth. It is our opinion that endodontic stabilizers should be considered in the treatment planning of seemingly nonretainable teeth. They ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81268-9
更新日期：1992-05-01 00:00:00
abstract：:Cyanoacrylate is an extremely strong bonding agent which has many applications in medicine. It is also effective in obtaining a leakproof seal of rubber dam around a structurally compromised tooth requiring endodontic therapy. ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/S0099-2399(06)81356-7
更新日期：1992-10-01 00:00:00
abstract：INTRODUCTION:Concentrated growth factor (CGF) is considered to be a natural biomaterial that is better than platelet-rich fibrin (PRF) in bone regeneration, but there is little information acquired in regenerative endodontics. Therefore, the purpose of this study was to evaluate their effects on the proliferation, migr...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2018.03.006
更新日期：2018-06-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to evaluate the effect of a range of alkaline pH values on the push-out strength of white mineral trioxide aggregate (WMTA). METHODS:The standardized lumens of root slices prepared from extracted single-rooted human teeth were filled with white ProRoot MTA. The specimens were the...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2010.08.022
更新日期：2010-11-01 00:00:00
abstract：:A new endodontic obturation and retrofilling material has been invented to satisfy Grossman's requirements for an ideal material. Methylene blue dye leakage studies were carried out to compare the new material with conventional products, for both obturation and retrofilling. The experimental material when used in root...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1097/00004770-200207000-00008
更新日期：2002-07-01 00:00:00
abstract：:The purpose of this study was to compare the reinforcement and strengthening ability of Resilon, gutta-percha, and a self-curing composite resin (Bisfil 2B) in endodontically treated roots of immature teeth. Sixty single rooted teeth were divided into five groups of 12 teeth each. Teeth in all groups except the negati...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2005.08.001
更新日期：2006-04-01 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：INTRODUCTION:Microorganisms are able to survive and cause persistent infection in the extraradicular area. The aims of this study were to investigate the primary bacterial flora and the localization of extraradicular biofilm in persistent apical periodontitis lesions. METHODS:Apical root samples from root-end surgery ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2012.03.004
更新日期：2012-07-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to evaluate and compare the antimicrobial activity of calcium hydroxide, triantibiotic mixture (TAM), and an ethanol extract of propolis as intracanal medicaments on Enterococcus faecalis-infected root canals. METHODS:One hundred twenty extracted intact human permanent incisors w...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2011.05.028
更新日期：2011-09-01 00:00:00
abstract：:The purpose of this study was to assess the push-out bond strength and coronal microleakage of the Epiphany (Pentron Clinical Technologies, Wallingford, CT) + Resilon (Resilon Research LLC, Madison, CT) obturation system with respect to different photoactivation methods used. Roots of human maxillary central incisors ...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2007.07.028
更新日期：2007-12-01 00:00:00
abstract：INTRODUCTION:It is important to develop an antimicrobial agent without any damage on dental pulp. In the present study, we examined whether pretreatment of bacterial lipopolysaccharides (LPS) with ozonated water (O(3)aq) improves LPS-induced responses of rat odontoblastic cell line, KN-3. METHODS:After the pretreatmen...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2009.01.016
更新日期：2009-05-01 00:00:00
abstract：INTRODUCTION:This study evaluated the biocompatibility of 5 and 10 μg/mL LL-37 in vitro and its effect on the differentiation of human dental pulp stem cells (DPSCs) into odontoblast-like cells. METHODS:Cell viability, genotoxicity, nitric oxide production, cell cycle, dentine sialophosphoprotein (DSPP) production, an...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2017.08.010
更新日期：2017-12-01 00:00:00
abstract：INTRODUCTION:The purpose of this study was to evaluate the accuracy of cone-beam computed tomographic (CBCT) to measure dentin thickness and its potential of predicting the remaining dentin thickness after the removal of fractured instrument fragments. METHODS:Twenty-three human mandibular molars were selected, and 4-...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2017.03.041
更新日期：2017-09-01 00:00:00
abstract：INTRODUCTION:Bleeding control is an important aspect in endodontic surgery. Two hemostatic techniques were compared with regard to their efficacy to bleeding control in endodontic surgery. METHODS:A randomized, 2-arm, parallel pilot study involving 30 patients with periradicular lesions was performed including the fol...
journal_title：Journal of endodontics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.joen.2019.04.011
更新日期：2019-08-01 00:00:00
abstract：INTRODUCTION:Several bioactive bioceramics with osteoconductive effects can inhibit osteoclast formation and bone resorption in vitro, but the exact underlying mechanism has not been fully elucidated. Bioaggregate (BA), a novel calcium silicate nanoparticulate bioceramic, significantly induces bone and periodontal rege...
journal_title：Journal of endodontics
pub_type： 杂志文章
doi：10.1016/j.joen.2015.05.018
更新日期：2015-09-01 00:00:00
