Optical detection of hemoglobin in pulpal blood.


:An in vitro, flow-through optical system was designed to measure hemoglobin (Hb) concentrations in the pulp space. The system included light-emitting diodes and a silicon photodetector positioned on opposing surfaces of human teeth. A syringe pump allowed a controlled flow of blood through the pulp chamber. The Hb concentration was computed as a nonlinear function of transmitted light intensity. Transmitted light intensities were also used as indicators of oxygenation level. Optical measurements correlated with Hb values measured by the conventional cyanmethemoglobin method (r=0.993). The mean percentage error was 5.8%, and the standard error of prediction was 0.77 g/dl for Hb concentrations ranging from 4 to 20 g/dl. Deoxygenated blood exhibited up to 31% lower transmitted intensity. Light transmission through teeth may be useful in the assessment of total Hb and blood oxygenation within the pulp chamber.


J Endod


Journal of endodontics


Diaz-Arnold AM,Arnold MA,Wilcox LR




Has Abstract


1996-01-01 00:00:00














  • Resistance of a 4-META-containing, methacrylate-based sealer to dislocation in root canals.

    abstract::The dislocation resistance of root fillings created with MetaSEAL, a self-adhesive 4-META-containing methacrylate resin-based sealer, was evaluated. Forty-six incisors were cleaned and shaped using NaOCl and EDTA as irrigants. They were filled with gutta-percha/MetaSEAL or gutta-percha/AH Plus sealer using either a si...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Lawson MS,Loushine B,Mai S,Weller RN,Pashley DH,Tay FR,Loushine RJ

    更新日期:2008-07-01 00:00:00

  • Endodontic management of supernumerary tooth fused with maxillary first molar by using cone-beam computed tomography.

    abstract:INTRODUCTION:Fusion is a rare occurrence, and its definitive diagnosis is of prime importance for successful root canal treatment. This case report discusses the endodontic management of a supernumerary tooth fused with a right maxillary first molar by using cone-beam computed tomography (CBCT). METHODS:Nonsurgical en...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Song CK,Chang HS,Min KS

    更新日期:2010-11-01 00:00:00

  • Regulated Cell Death in Pulpitis.

    abstract::Regulated cell death (RCD) is a preferred term inclusive of all modes of cell death regulated by multiple intracellular signal transduction pathways under physiological and pathologic conditions. Although cell death programs ensure correct growth and developmental processes as well as protect the host against microbia...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,评审


    authors: Huang M,Zhan C,Yang X,Hou J

    更新日期:2020-10-01 00:00:00

  • Progress and Challenges in Microengineering the Dental Pulp Vascular Microenvironment.

    abstract:INTRODUCTION:The dental pulp is highly vascularized and innervated tissue that is uniquely designed, being highly biologically active, while being enclosed within the calcified structure of the tooth. It is well-established that the dental pulp vasculature is a key requirement for the functional performance of the toot...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Bertassoni LE

    更新日期:2020-09-01 00:00:00

  • 3-Rooted Maxillary First Premolars: An Ex Vivo Study of External and Internal Morphologies.

    abstract:INTRODUCTION:This study aimed to analyze the external and internal morphologies of 3-rooted maxillary first premolars using cone-beam computed tomographic (CBCT) imaging. METHODS:Fifty-six three-rooted maxillary first premolars were imaged by CBCT imaging and classified into 4 groups on the basis of external root morp...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Beltes P,Kalaitzoglou ME,Kantilieraki E,Beltes C,Angelopoulos C

    更新日期:2017-08-01 00:00:00

  • Effects of sonic instrumentation on the apical preparation of curved canals.

    abstract::This study compared apical transportation produced in curved (45- to 60-degree) molar canals instrumented with two MM-3000 Sonic Air test files (Rispi-Sonic and Trio-Sonic) with apical transportation from instrumentation with conventional K-type files. Seventy-five extracted human permanent mandibular molars were equa...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Ehrlich AD,Boyer TJ,Hicks ML,Pelleu GB Jr

    更新日期:1989-05-01 00:00:00

  • Evaluation of ultrasonic and sonic instruments for intraradicular post removal.

    abstract::Ultrasonic instruments are a valuable asset for removing intraradicular posts from root canals before nonsurgical endodontic therapy. The purpose of this study was to evaluate the relative efficacy of post removal by ultrasonic and sonic devices. Fifty extracted teeth were instrumented and obturated. The canals were p...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Buoncristiani J,Seto BG,Caputo AA

    更新日期:1994-10-01 00:00:00

  • Anesthetic efficacy of four percent articaine for pulpal anesthesia by using inferior alveolar nerve block and buccal infiltration techniques in patients with irreversible pulpitis: a prospective randomized double-blind clinical trial.

    abstract:INTRODUCTION:The study was designed as a randomized double-blind trial to evaluate the anesthetic efficacy of 4% articaine with 1:100,000 epinephrine in inferior alveolar nerve block (IANB) and infiltration anesthetic techniques to anesthetize mandibular molars with irreversible pulpitis. METHODS:The study was compose...

    journal_title:Journal of endodontics

    pub_type: 杂志文章,随机对照试验


    authors: Poorni S,Veniashok B,Senthilkumar AD,Indira R,Ramachandran S

    更新日期:2011-12-01 00:00:00

  • Cone-beam Computed Tomographic Analysis of Canal Transportation and Centering Ability of Single-file Systems.

    abstract:INTRODUCTION:The purpose of this study was to compare canal transportation and the centering ability of Reciproc (VDW, Munich, Germany), WaveOne (Dentsply Maillefer, Ballaigues, Switzerland), and EdgeFile (EdgeEndo, Albuquerque, NM) rotary systems using cone-beam computed tomographic imaging. METHODS:Ninety mesiobucca...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Hasheminia SM,Farhad A,Sheikhi M,Soltani P,Hendi SS,Ahmadi M

    更新日期:2018-12-01 00:00:00

  • Micro-computed Tomographic Evaluation of the Shaping Ability of 3 Reciprocating Single-File Nickel-Titanium Systems on Single- and Double-Curved Root Canals.

    abstract:INTRODUCTION:We performed a micro-computed tomographic assessment of the preparation of moderately single- and double-curved root canals using 3 single-file reciprocating nickel-titanium systems: S1 Plus Standard (Sendoline, Täby, Sweden), WaveOne Gold Primary (Dentsply Sirona, Ballaigues, Switzerland), and Reciproc R2...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Haupt F,Pult JRW,Hülsmann M

    更新日期:2020-08-01 00:00:00

  • Complement Activation by Pulp Capping Materials Plays a Significant Role in Both Inflammatory and Pulp Stem Cells' Recruitment.

    abstract:INTRODUCTION:The role of complement, especially through the C5a fragment, is well-known for the initiation of inflammation. Its involvement in regeneration has been shown more recently by the recruitment of mesenchymal stem cells. C5a can be produced locally by the pulp fibroblasts in response to injury or infection. T...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Giraud T,Rufas P,Chmilewsky F,Rombouts C,Dejou J,Jeanneau C,About I

    更新日期:2017-07-01 00:00:00

  • Apical extrusion of thermoplasticized obturating material in canals instrumented with Profile 0.06 or Profile GT.

    abstract::The purpose of this in vitro study was to compare the extrusion of thermoplacticized gutta-percha in teeth instrumented with Profile 0.06 or Profile GT, and obturated with Thermafil Plus and Thermafil GT, respectively. A total of 120, extracted, human maxillary central incisors were divided into four equal groups. Gro...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Robinson MJ,McDonald NJ,Mullally PJ

    更新日期:2004-06-01 00:00:00

  • Relationship of radiologic and histologic signs of inflammation in human root-filled teeth.

    abstract::The aim of this study was to determine the relationship between histologic and radiologic signs of inflammation in human root-filled teeth. In addition, other factors with possible importance for apical inflammation were assessed. Fifty-three block sections of root-filled teeth were gathered from human cadavers. The b...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Barthel CR,Zimmer S,Trope M

    更新日期:2004-02-01 00:00:00

  • Prevalence of middle mesial canals in mandibular molars after guided troughing under high magnification: an in vivo investigation.

    abstract:INTRODUCTION:A limited number of in vivo studies have discussed the prevalence of middle mesial canals in root canal systems of mandibular molars. The reported results have varied between 1% and 25%, with no detailed description of the depth and direction of troughing needed to identify such small canal orifices. The o...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Azim AA,Deutsch AS,Solomon CS

    更新日期:2015-02-01 00:00:00

  • DIAGNOdent laser fluorescence assessment of endodontic infection.

    abstract:INTRODUCTION:Real-time assessment of the microbial status of the root canal system would be useful in clinical endodontic practice for determining endpoints of biomechanical treatment. This laboratory study used an existing laser fluorescence device, the DIAGNOdent (KaVo, Biberach, Germany), in a proof-of-concept study...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Sainsbury AL,Bird PS,Walsh LJ

    更新日期:2009-10-01 00:00:00

  • Leakage associated with single or multiple increment backfill with the Obtura II gutta-percha system.

    abstract::The purpose of this in vitro study was to compare dye leakage between canals backfilled in a single increment and canals backfilled in multiple increments using the Obtura II system with two different sealers. Sixty extracted single canal teeth were decoronated, cleaned, and shaped. After master cone fit and placement...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Johnson BT,Bond MS

    更新日期:1999-09-01 00:00:00

  • Differential regulation of interleukin-6 and inducible cyclooxygenase gene expression by cytokines through prostaglandin-dependent and -independent mechanisms in human dental pulp fibroblasts.

    abstract::Increased levels of interleukin-1 (IL)-1, tumor necrosis factor-alpha (TNF-alpha), IL-6, and prostaglandin E2 (PGE2) have been detected in inflamed pulp tissue. To gain further insight into the molecular pathogenesis of pulpitis, we investigated the effects of IL-1alpha or TNF-alpha and PGE2, either alone or in combin...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Lin SK,Kuo MY,Wang JS,Lee JJ,Wang CC,Huang S,Shun CT,Hong CY

    更新日期:2002-03-01 00:00:00

  • Post removal prior to retreatment.

    abstract::Removing posts from root canals prior to endodontic retreatment is often a challenge. The Gonon post removing system (Thomas Extracteur De Pivots; FFDM-Pneumat, Bourges, France) is safe and efficient and can be used for anterior, bicuspid, and even molar teeth. The Gonon system is illustrated with one clinical case. ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Machtou P,Sarfati P,Cohen AG

    更新日期:1989-11-01 00:00:00

  • A radiographic, histological, and histometric study of endodontic materials.

    abstract::Silicone tubes filled with CRCS, a calcium hydroxide-based cement, were implanted at two different localizations in the right tibias of white male Wistar rats. A similar number of solid silicone rods were implanted in the left tibias of the same animals and were used as inert controls. Fifteen days after implantation ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Guglielmotti MB,Zmener O,Cabrini RL

    更新日期:1989-01-01 00:00:00

  • In vitro cytotoxicity of root canal filling materials: 1. Gutta-percha.

    abstract::Gutta-percha (GP) has been the most widely used root canal filling material because of its well-known low toxicity. The inertness of GP, however, was challenged recently. The purpose of this study was to evaluate the toxicity of marketed endodontic GP using the radiochromium release test. Fourteen commercially availab...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Pascon EA,Spångberg LS

    更新日期:1990-09-01 00:00:00

  • Apical enlargement: influence on the sealing ability of the vertical compaction technique.

    abstract::This study sought to evaluate the influence of apical enlargement on the sealing ability of vertical compaction. Sixty anterior teeth were used. Half of these teeth were prepared to a size 25 file and the other half to a size 40 file. Then vertical compaction was performed. Apical microleakage was determined using pre...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Yared GM,Bou Dagher FE

    更新日期:1994-07-01 00:00:00

  • Severe Pain after Endodontic Surgery: An Analysis of Incidence and Risk Factors.

    abstract:INTRODUCTION:The aim of this study was to determine the prevalence and characteristics of postoperative pain after endodontic microsurgery and to identify potential predictors for severe pain. METHODS:One hundred seventy-three patients who underwent endodontic microsurgery at a private practice were included in the st...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Malagise CJ,Khalighinejad N,Patel YT,Jalali P,He J

    更新日期:2020-12-23 00:00:00

  • Root Canal Treatment and Apical Periodontitis in a Brazilian Population with Type 1 Diabetes Mellitus: A Cross-sectional Paired Study.

    abstract:INTRODUCTION:This study radiographically analyzed the prevalence of root canal treatment (RCT) and apical periodontitis (AP) in type 1 diabetes mellitus (T1DM) and nondiabetic individuals and its association with the history/current status of T1DM. METHODS:In a cross-sectional paired study, the radiographic records of...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Limeira FIR,Arantes DC,de Souza Oliveira C,de Melo DP,Magalhães CS,Bento PM

    更新日期:2020-06-01 00:00:00

  • Effects of erbium,chromium:YSGG laser irradiation on root canal walls: a scanning electron microscopic and thermographic study.

    abstract::The present study evaluates the morphological changes in root canal walls and temperature changes at root surfaces as a result of intracanal irradiation by erbium,chromium:YSGG laser under various conditions in vitro. Sixty single-rooted human teeth were examined. Root canals were prepared, and laser irradiation was p...

    journal_title:Journal of endodontics

    pub_type: 临床试验,杂志文章,随机对照试验


    authors: Yamazaki R,Goya C,Yu DG,Kimura Y,Matsumoto K

    更新日期:2001-01-01 00:00:00

  • Comparison of endotoxin levels found in primary and secondary endodontic infections.

    abstract:INTRODUCTION:This clinical study was conducted to compare the levels of endotoxins (lipopolysaccharides [LPSs]) found in primary and secondary endodontic infections with apical periodontitis by correlating LPS contents with clinical/radiographic findings. In addition, the presence of target gram-negative anaerobic bact...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Gomes BP,Endo MS,Martinho FC

    更新日期:2012-08-01 00:00:00

  • Porphyromonas (Bacteroides) endodontalis: its role in endodontal infections.

    abstract::Porphyromonas endodontalis (formerly Bacteroides endodontalis) is a black-pigmented anaerobic Gram-negative rod which is associated with endodontal infections. It has been isolated from infected dental root canals and submucous abscesses of endodontal origin. The presence of P. endodontalis in infected dental root can...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: van Winkelhoff AJ,van Steenbergen TJ,de Graaff J

    更新日期:1992-09-01 00:00:00

  • Sealers and warm gutta-percha obturation techniques.

    abstract:INTRODUCTION:Warm vertically compacted gutta-percha obturation techniques use root canal sealers that are heated during the obturation. This study aims at investigating the suitability of selected sealers with warm gutta-percha obturation techniques. METHODS:The composition of an experimental sealer (Septodont; Saint ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Camilleri J

    更新日期:2015-01-01 00:00:00

  • Removal of Calcium Hydroxide from Artificial Grooves in Straight Root Canals: Sonic Activation Using EDDY Versus Passive Ultrasonic Irrigation and XPendo Finisher.

    abstract:INTRODUCTION:The aim of the present study was to compare sonic activation using EDDY (VDW, Munich, Germany), passive ultrasonic irrigation (PUI), and mechanical activation using the XPendo Finisher (FKG Dentaire, La Chaux-des-Fonds, Switzerland) for the removal of calcium hydroxide from artificial grooves in straight r...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Donnermeyer D,Wyrsch H,Bürklein S,Schäfer E

    更新日期:2019-03-01 00:00:00

  • Interleukin-10 receptor expression in human dental pulp cells in response to lipopolysaccharide from Prevotella intermedia.

    abstract::Interleukin-10 receptor (IL-10R) expression in human, dental pulp, fibroblast cultures was investigated by using the reverse transcriptase-polymerase chain reaction (RT-PCR) technique. After exposure to lipopolysaccharide (LPS) from Prevotella intermedia, the IL-10R mRNA levels increased after 4 h, peaked at 7 h, and ...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Tokuda M,Nagaoka S,Torii M

    更新日期:2003-01-01 00:00:00

  • Tumor Necrosis Factor Receptor-associated Factor 6 Plays a Role in the Inflammatory Responses of Human Periodontal Ligament Fibroblasts to Enterococcus faecalis.

    abstract:INTRODUCTION:Enterococcus faecalis is a frequently isolated microorganism in persistent periapical lesion or secondary infection. However, no evidence has demonstrated that E. faecalis induced inflammation directly in the apical area. This study aimed to explore the mechanism of the inflammatory responses of human peri...

    journal_title:Journal of endodontics

    pub_type: 杂志文章


    authors: Zhang L,Wang T,Lu Y,Zheng Q,Gao Y,Zhou X,Huang D

    更新日期:2015-12-01 00:00:00