Root canal morphology of mandibular permanent molars at different ages.

Abstract:

AIM:To investigate differences in the root canal morphology of permanent mandibular molar teeth at various ages. METHODOLOGY:Four hundred and eighty permanent mandibular first and second molars were examined. First and second molars were divided into six and five groups, respectively, according to the age of the patient at the time of extraction. Root canal morphology was studied using a clearing technique. The canal morphology of the mesial root was classified into three stages depending on its developmental pattern. When the root canal system was completely differentiated, the canal classification and the number of lateral canals and inter-canal communications were recorded. Vertucci's classification was taken as the main reference. Canal morphology was compared amongst age groups. RESULTS:In both first and second molars, developmental stages of canal morphology amongst age groups were significantly different (P < 0.0001). The prevalence of inter-canal communications was highly significantly different in the first (P < 0.0001) and less significant in the second molar (P < 0.05). After completion of the canal differentiation, the mesial roots of first molars had type IV and II canal forms. The majority of the mesial roots of second molars had type I and III canals. C-shaped canals were found in 3% of second molars. CONCLUSIONS:Mesial roots of first and second molars mostly had one large canal until 11 and 15 years of age, respectively. In both molars, the canal system was completely defined at 30-40 years. The prevalence of inter-canal communications was low at young and old ages but high at intermediate ages.

journal_name

Int Endod J

authors

Peiris HR,Pitakotuwage TN,Takahashi M,Sasaki K,Kanazawa E

doi

10.1111/j.1365-2591.2008.01428.x

subject

Has Abstract

pub_date

2008-10-01 00:00:00

pages

828-35

issue

10

eissn

0143-2885

issn

1365-2591

pii

IEJ1428

journal_volume

41

pub_type

杂志文章
  • Development and preliminary evaluation of a new screening instrument for atypical odontalgia and persistent dentoalveolar pain disorder.

    abstract:AIM:To develop and preliminarily evaluate a new screening instrument for atypical odontalgia (AO) or persistent dentoalveolar pain disorder (PDAP). To evaluate the instrument's performance in detecting AO/PDAP amongst a heterogeneous group of orofacial pain conditions and pain-free controls and empirically compare its ...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.13017

    authors: Durham J,Stone SJ,Robinson LJ,Ohrbach R,Nixdorf DR

    更新日期:2019-03-01 00:00:00

  • The effect of TRPM7 suppression on the proliferation, migration and osteogenic differentiation of human dental pulp stem cells.

    abstract:AIM:To investigate the role of the Ca(2+) -Mg(2+) ion channel TRPM7 in the proliferation, migration and osteogenic differentiation of human dental pulp stem cells (hDPSCs). METHODOLOGY:Immunohistochemistry was used to localize expression of TRPM7 in human dental pulp tissues and in cultured hDPSCs. Isolated hDPSCs wer...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12193

    authors: Cui L,Xu SM,Ma DD,Wu BL

    更新日期:2014-06-01 00:00:00

  • Cytotoxicity, interaction with dentine and efficacy on multispecies biofilms of a modified salt solution intended for endodontic disinfection in a new in vitro biofilm model.

    abstract:AIM:To investigate the cytotoxicity of a modified salt solution (MSS) and evaluate the antimicrobial properties of MSS on in vitro biofilm models. METHODOLOGY:In a metabolic assay, fibroblasts derived from periodontal ligaments (PDL) of human extracted teeth were cultured and challenged with MSS or controls. Then, in ...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12294

    authors: van der Waal SV,Scheres N,de Soet JJ,Wesselink PR,Crielaard W

    更新日期:2015-02-01 00:00:00

  • A comparative study of root canal preparation using FlexMaster and HERO 642 rotary Ni-Ti instruments.

    abstract:AIM:To compare several parameters of root canal preparation using two different rotary nickel-titanium (Ni-Ti) instruments: FlexMaster (VDW, Munich, Germany) and HERO 642 (Micro-Mega, Besançon, France). METHODOLOGY:Fifty extracted human mandibular molars with root canal curvatures between 20 and 40 degrees were embedd...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1046/j.1365-2591.2003.00664.x

    authors: Hülsmann M,Gressmann G,Schäfers F

    更新日期:2003-05-01 00:00:00

  • Antimicrobial peptide GH12 as root canal irrigant inhibits biofilm and virulence of Enterococcus faecalis.

    abstract:AIM:The objectives of this laboratory-based study were to investigate the effects of GH12 on Enterococcus faecalis biofilm and virulence. METHODOLOGY:Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of GH12 against E. faecalis were first determined. A time-kill assay was further cond...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.13296

    authors: Li Y,Wang Y,Chen X,Jiang W,Jiang X,Zeng Y,Li X,Feng Z,Luo J,Zhang L

    更新日期:2020-07-01 00:00:00

  • Capacitance effect of rubber gloves on electric pulp testers.

    abstract::Electric pulp testers (EPTs) are widely used to assess tooth pulp vitality. With many unipolar EPTs the electrical circuit is completed through the operator. Since dentists now routinely wear rubber gloves, these might be expected to provide electrical insulation, and therefore to break the circuit. The objective of t...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.1989.tb00516.x

    authors: Treasure P

    更新日期:1989-09-01 00:00:00

  • Shaping ability of GTTM Rotary Files in simulated resin root canals.

    abstract:AIM:The aim of this study was to determine the shaping ability of GT Rotary Files in simulated root canals. METHODOLOGY:Forty canals with four different shapes in terms of angle (40 degrees and 60 degrees) and position of curvature (straight section before curve: 8 and 12 mm) were prepared using a crown-down/stepback ...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1046/j.1365-2591.2002.00540.x

    authors: Calberson FL,Deroose CA,Hommez GM,Raes H,De Moor RJ

    更新日期:2002-07-01 00:00:00

  • Influence of oval and circular post placement using different resin cements on push-out bond strength and void volume analysed by micro-CT.

    abstract:AIM:To evaluate the percentage volume of voids within cement layers, to determine the push-out bond strength of circular and oval fibre posts luted with different commercial resin cements in oval cross-sectional root canals, and to correlate push-out bond strength values and volume of voids of circular and oval fibre p...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12568

    authors: Uzun I,Keleş A,Arslan H,Güler B,Keskin C,Gündüz K

    更新日期:2016-12-01 00:00:00

  • One-session root canal treatment with antimicrobial photodynamic therapy (aPDT): an in vivo study.

    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

    authors: Borsatto MC,Correa-Afonso AM,Lucisano MP,Bezerra da Silva RA,Paula-Silva FW,Nelson-Filho P,Bezerra da Silva LA

    更新日期:2016-06-01 00:00:00

  • Oscillatory pattern of sonically powered endodontic files.

    abstract::When operated in air, the sonic endodontic instrument produced a movement at the driver head which resulted in a large elliptical oscillation of the file. This motion had similar properties to ultrasonically operated files in that there was a distinct variability in the magnitude of the vibratory motion between files ...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.1989.tb00910.x

    authors: Walmsley AD,Lumley PJ,Laird WR

    更新日期:1989-05-01 00:00:00

  • Root and canal morphology of the mesiobuccal and distal roots of permanent first molars in a Kuwait population--a clinical study.

    abstract:AIM:To identify the number of roots and canal configurations in permanent first molars of the indigenous Kuwaiti sub-population and compare them against a similar group of non-Kuwaiti population in different age groups and gender, and to determine the frequency of a second canal in the mesiobuccal root of maxillary fir...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2008.01427.x

    authors: Pattanshetti N,Gaidhane M,Al Kandari AM

    更新日期:2008-09-01 00:00:00

  • The effect of capsaicin on substance P expression in pulp tissue inflammation.

    abstract:AIM:To evaluate the effect of capsaicin on substance P (SP) expression during induced inflammation in rat pulp tissue. METHODOLOGY:Radioimmunoanalysis was used to measure SP levels in 36 mandibular molar pulps taken from six Wistar rats. Twelve samples were obtained from healthy pulps and used as negative control grou...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2004.00893.x

    authors: Caviedes-Bucheli J,Azuero-Holguin MM,Munoz HR

    更新日期:2005-01-01 00:00:00

  • Fluoride-containing nanoporous calcium-silicate MTA cements for endodontics and oral surgery: early fluorapatite formation in a phosphate-containing solution.

    abstract:AIM:To test the chemical-physical properties and apatite-forming ability of experimental fluoride-doped calcium silicate cements designed to create novel bioactive materials for use in endodontics and oral surgery. METHODOLOGY:A thermally treated calcium silicate cement (wTC) containing CaCl(2) 5%wt was modified by ad...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2011.01907.x

    authors: Gandolfi MG,Taddei P,Siboni F,Modena E,Ginebra MP,Prati C

    更新日期:2011-10-01 00:00:00

  • Effect of EDTA conditioning upon the retention of fibre posts luted with resin cements.

    abstract:AIM:To determine if a final rinse with EDTA improves the short-term in-tooth retentive strength of adhesively luted fibre-reinforced composite posts. METHODOLOGY:Six different commercial fibre post systems were tested. Post spaces in extracted human anterior teeth were irrigated with either 6% NaOCl or 6% NaOCl follow...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2008.01482.x

    authors: Rasimick BJ,Shah RP,Musikant BL,Deutsch AS

    更新日期:2008-12-01 00:00:00

  • Pattern of transmission of laser light through carious molar teeth.

    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

    authors: Chandler NP,Pitt Ford TR,Watson TF

    更新日期:2001-10-01 00:00:00

  • Percutaneous injuries amongst Greek endodontists: a national questionnaire survey.

    abstract:AIM:To investigate amongst Greek endodontists the incidence of percutaneous injuries, the circumstances associated with them, the therapeutic measures taken after the injuries and their compliance with infection control measures. METHODOLOGY:One hundred and forty-seven endodontists met the inclusion criteria and were ...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2012.02126.x

    authors: Zarra T,Lambrianidis T

    更新日期:2013-03-01 00:00:00

  • Activated platelets increase proliferation and protein synthesis of human dental pulp-derived cells.

    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

    authors: Agis H,Stampfl B,Watzek G,Gruber R

    更新日期:2010-02-01 00:00:00

  • Ten-year follow-up of root filled teeth: a radiographic study of a Danish population.

    abstract:AIM:To assess the long-term outcome of root filled teeth in a general adult population examined in 1997, 2003 and 2008. METHODOLOGY:The study provides longitudinal, observational information on endodontic status for 327 randomly selected individuals from a general Danish population receiving three consecutive full-mou...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12245

    authors: Kirkevang LL,Vaeth M,Wenzel A

    更新日期:2014-10-01 00:00:00

  • Resistance to fracture of roots filled with three different techniques.

    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

    authors: Sagsen B,Er O,Kahraman Y,Akdogan G

    更新日期:2007-01-01 00:00:00

  • Stress distribution in root filled teeth restored with various post and core techniques: effect of post length and crown height.

    abstract:AIM:To investigate interfacial stress distribution in restored root filled teeth with various post lengths and crown heights. METHODOLOGY:Three-dimensional mathematical models of a root filled mandibular premolar tooth were constructed. Parts of the tooth structures were replaced with ceramic crowns having three crown...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12397

    authors: Kainose K,Nakajima M,Foxton R,Wakabayashi N,Tagami J

    更新日期:2015-11-01 00:00:00

  • Efficacy of different irrigants in the removal of calcium hydroxide from root canals.

    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

    authors: Rödig T,Vogel S,Zapf A,Hülsmann M

    更新日期:2010-06-01 00:00:00

  • Root canal morphology of mandibular first premolars in an Indian population: a laboratory study.

    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

    authors: Velmurugan N,Sandhya R

    更新日期:2009-01-01 00:00:00

  • Comparison of pulp response to mineral trioxide aggregate and a bioceramic paste in partial pulpotomy of sound human premolars: a randomized controlled trial.

    abstract:AIM:This randomized clinical trial evaluated clinical sign/symptoms as well as histological pulp reactions in terms of inflammation and mineralized bridge formation after partial pulpotomy of sound human premolars and placement of a bioceramic paste (iRoot BP) or tooth-colored ProRoot MTA as pulp-covering biomaterials....

    journal_title:International endodontic journal

    pub_type: 杂志文章,随机对照试验

    doi:10.1111/iej.12231

    authors: Azimi S,Fazlyab M,Sadri D,Saghiri MA,Khosravanifard B,Asgary S

    更新日期:2014-09-01 00:00:00

  • Microbial causes of endodontic flare-ups.

    abstract:LITERATURE REVIEW:Inter-appointment flare-up is characterized by the development of pain, swelling or both, following endodontic intervention. The causative factors of flare-ups encompass mechanical, chemical and/or microbial injury to the pulp or periradicular tissues. Of these factors, microorganisms are arguably the...

    journal_title:International endodontic journal

    pub_type: 杂志文章,评审

    doi:10.1046/j.1365-2591.2003.00671.x

    authors: Siqueira JF Jr

    更新日期:2003-07-01 00:00:00

  • Comparison of centring ability and transportation between four nickel titanium instrumentation techniques by micro-computed tomography.

    abstract:AIM:To compare the centring ability and transportation of ProTaper Next (PTN), ProTaper Universal (PTU), Race 123 and RevoS using micro-computed tomography (μCT). METHODOLOGY:Sixty mesial root canals of thirty mandibular molars were divided virtually into coronal, middle and apical thirds, and two reproducible referen...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12658

    authors: Saberi N,Patel S,Mannocci F

    更新日期:2017-06-01 00:00:00

  • Apical negative pressure irrigation versus syringe irrigation: a systematic review of cleaning and disinfection of the root canal system.

    abstract::The aim of this study was to systematically review and critically analyse the published data on the treatment outcome (primary outcome) and on the cleaning and disinfection of root canals (secondary outcomes) achieved by negative pressure irrigation as compared to syringe irrigation. An electronic search was conducted...

    journal_title:International endodontic journal

    pub_type: 杂志文章,评审

    doi:10.1111/iej.12725

    authors: Konstantinidi E,Psimma Z,Chávez de Paz LE,Boutsioukis C

    更新日期:2017-11-01 00:00:00

  • The use of cone beam computed tomography in the management of dens invaginatus affecting a strategic tooth in a patient affected by hypodontia: a case report.

    abstract:AIM:To report on the use of cone beam computed tomography (CBCT) in the diagnosis and management of dens invaginatus. SUMMARY:Chronic apical periodontitis of an invaginated maxillary lateral incisor was diagnosed in a patient suffering from hypodontia and awaiting active orthodontic therapy. Loss of the tooth would ha...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/j.1365-2591.2011.01866.x

    authors: Durack C,Patel S

    更新日期:2011-05-01 00:00:00

  • Factors influencing the fracture of nickel-titanium rotary instruments.

    abstract:AIM:To evaluate the effect of rotational speed and the angle and radius of curvature of root canals on the fracture of two types of nickel-titanium rotary instruments: K3 and ProTaper. METHODOLOGY:A total of 240 root canals of extracted human maxillary and mandibular molars were divided into two groups of 120, accordi...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1046/j.1365-2591.2003.00630.x

    authors: Martín B,Zelada G,Varela P,Bahillo JG,Magán F,Ahn S,Rodríguez C

    更新日期:2003-04-01 00:00:00

  • Influence of the exposure of MTA with and without calcium chloride to phosphate-buffered saline on the push-out bond strength to dentine.

    abstract:AIM:To analyse the influence of exposure of mineral trioxide aggregate (MTA) with and without calcium chloride (CaCl2 ) to phosphate-buffered saline (PBS) on the push-out bond strength, over different experimental periods. METHODOLOGY:One hundred and twenty dentine discs with standardized cavities were filled with MTA...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12168

    authors: de Almeida J,Felippe MC,Bortoluzzi EA,Teixeira CS,Felippe WT

    更新日期:2014-05-01 00:00:00

  • Biocompatibility of root filling pastes used in primary teeth.

    abstract:AIM:To evaluate the biocompatibility of two pastes designed to fill the root canals of primary teeth. METHODOLOGY:A study group of 54 mice received subcutaneous tissue implants of polyethylene tubes containing CTZ or calcium hydroxide paste or, as a negative control, empty tubes. Biocompatibility was evaluated on days...

    journal_title:International endodontic journal

    pub_type: 杂志文章

    doi:10.1111/iej.12328

    authors: Lima CC,Conde Júnior AM,Rizzo MS,Moura RD,Moura MS,Lima MD,Moura LF

    更新日期:2015-05-01 00:00:00