Journal of Endodontics

April 2013, Volume 39, Number 4

Clinical Research 429

Reversal of Pulpal and Soft Tissue Anesthesia by Using Phentolamine:A Prospective Randomized, Single-blind StudySpencer Elmore, John Nusstein, Melissa Drum, Al Reader, Mike Beck, and Sara Fowler

435

A Cone-beam Computed Tomography Study of the Root Canal Morphologyof Mandibular First Premolars and the Location of Root Canal Orificesand Apical Foramina in a Chinese SubpopulationHaibing Yang, Cheng Tian, Guoju Li, Lin Yang, Xuan Han, and Yan Wang

439

Is Mandibular Molar Buccal Infiltration a Mental and Incisive Nerve Block?A Randomized Controlled TrialCharlotte C. Currie, John G. Meechan, John M. Whitworth, and Ian P. Corbett

444

Expression Levels of Matrix Metalloproteinase-9 and Gram-negative Bacteriain Symptomatic and Asymptomatic Periapical LesionsGeraldine M. Ahmed, Alaa A. El-Baz, Ahmed Abdel Rahman Hashem, and Abeer K. Shalaan

449

Different Treatment Protocols for Different Pulpal and Periapical Diagnosesof 72 Cracked TeethSin-Young Kim, Su-Hyun Kim, Soo-Bin Cho, Gyung-Ok Lee, and Sung-Eun Yang

453

Th1 and Th2-like Protein Balance in Human Inflammatory Radicular Cystsand Periapical GranulomasCarlos Alberto de Carvalho Fraga, Lucas Rodrigues Alves, Adriana Alkmim de Sousa,Sabrina Ferreira de Jesus, Daniel Nogueira Vilela, Camila Santos Pereira,Patr�ıcia Luciana Batista Domingos, Agostinho Goncalves Viana, Bruno Correia Jham,Alfredo Maur�ıcio Batista de Paula, and Andr�e Luiz Sena Guimar~aes

456

Elevated Tumor Necrosis Factor-alpha Expression in Periapical LesionsInfected by Epstein-Barr VirusKatinka Hern�adi, Eszter Gy€ongy€osi, Be�ata M�esz�aros, Levente Szak�acs, Anita Szalm�as,Eszter Csoma, Rich�ard Mogyor�osi, Levente Czompa, Gy€orgy Veress, Istv�an Varga,Ildik�o Judit M�arton, and J�ozsef K�onya

Basic Research—Biology 461

The Antioxidant Property of Pachymic Acid Improves Bone Disturbanceagainst AH Plus–induced Inflammation in MC-3T3 E1 CellsTae-Gun Kim, Young-Hee Lee, Nan-Hee Lee, Govinda Bhattarai, In-Kyoung Lee,Bong-Sik Yun, and Ho-Keun Yi

467

Biological Effects and Washout Resistance of a Newly Developed Fast-settingPozzolan CementYoorina Choi, Su-Jung Park, Seoung-Hoon Lee, Yun-Chan Hwang, Mi-Kyung Yu,and Kyung-San Min

473

Effect of the Source of Biofilm Bacteria, Level of Biofilm Maturation,and Type of Disinfecting Agent on the Susceptibility of Biofilm Bacteriato Antibacterial AgentsSonja Stojicic, Ya Shen, and Markus Haapasalo

478

In Vitro Cytotoxicity Evaluation of a Novel Root Repair MaterialHui-min Zhou, Ya Shen, Zhe-jun Wang, Li Li, Yu-feng Zheng, Lari H€akkinen,and Markus Haapasalo

Journal of EndodonticsApril 2013, Volume 39, Number 4

484

Coronal Tooth Discoloration and White Mineral Trioxide AggregateDaniel Felman and Peter Parashos

488

Up-regulation of p38 Mitogen-activated Protein Kinase during PulpInjury–induced Glial Cell/Neuronal Interaction in the Rat ThalamusTomoatsu Kaneko, Uraiwan Chokechanachaisakul, Jun Kawamura, Yusuke Yamanaka,Takafumi Ito, Mitsuhiro Sunakawa, Hideaki Suda, and Takashi Okiji

493

Methylation Pattern of IFNG in Periapical Granulomas and Radicular CystsKelma Campos, Carolina Cavali�eri Gomes, Jeane de F�atima Correia-Silva,Lucyana Conceic~ao Farias, Thiago Fonseca–Silva, Vanessa F�atima Bernardes,Cl�audia Maria Pereira, and Ricardo Santiago Gomez

Basic Research—Technology 497

Biocompatibility of Mineral Trioxide Aggregate Mixed with Hydration AcceleratorsJi-Youn Kang, Bin-Na Lee, Hye-Ju Son, Jeong-Tae Koh, Seong-Soo Kang, Ho-Hyun Son,Hoon-Sang Chang, In-Nam Hwang, Yun-Chan Hwang, and Won-Mann Oh

501

Incidence of Dentinal Defects after Root Canal Preparation: Reciprocatingversus Rotary InstrumentationSebastian B€urklein, Polymnia Tsotsis, and Edgar Sch€afer

505

Interactions between Irrigants Commonly Used in Endodontic Practice:A Chemical AnalysisMa�ıra Prado, Helv�ecio M. Santos J�unior, Claudia M. Rezende, Angelo C. Pinto,Roberto B. Faria, Renata A. Sim~ao, and Brenda P.F.A. Gomes

511

Apical Pressure and Extent of Irrigant Flow beyond the Needle Tipduring Positive-pressure Irrigation in an In Vitro Root Canal ModelEllen Park, Ya Shen, Mehrzad Khakpour, and Markus Haapasalo

516

Comparison of the Mechanical Properties of Rotary Instruments Made of ConventionalNickel-Titanium Wire, M-Wire, or Nickel-Titanium Alloy in R-PhaseH�elio P. Lopes, Thaiane Gambarra-Soares, Carlos N. Elias, Jos�e F. Siqueira, Jr,Ines F.J. Inojosa, Weber S.P. Lopes, and Victor T.L. Vieira

521

Effect of Needle Insertion Depth and Root Canal Curvature on IrrigantExtrusion Ex VivoZoi Psimma, Christos Boutsioukis, Eleftherios Kastrinakis, and Leonidas Vasiliadis

525

Influence of Light and Oxygen on the Color Stability of Five Calcium Silicate–basedMaterialsMarta Vall�es, Montse Mercad�e, Fernando Duran-Sindreu, Jose L. Bourdelande, and Miguel Roig

529

Periapical Pressures Developed by Nonbinding Irrigation Needles at VariousIrrigation Delivery RatesSara Khan, Li-na Niu, Ashraf A. Eid, Stephen W. Looney, Anthony Didato, Steven Roberts,David H. Pashley, and Franklin R. Tay

534

Glide Path Preparation in S-shaped Canals with Rotary Pathfinding Nickel-TitaniumInstrumentsNatasha C.C. Ajuz, Luciana Armada, Lucio S. Goncalves, Gilberto Debelian,and Jos�e F. Siqueira, Jr

Journal of EndodonticsApril 2013, Volume 39, Number 4

538

Intramanufacturer Diameter and Taper Variability of Rotary Instrumentsand Their Corresponding Gutta-percha ConesMatthew B. Chesler, Patricia A. Tordik, Glen M. Imamura, and Gary G. Goodell

542

Characterization of Dentin Matrix Biomodified by Galla Chinensis ExtractMeng Deng, Xiaoli Dong, Xuedong Zhou, Lufei Wang, Hong Li, and Xin Xu

Case Report/Clinical Techniques 548

Intraoperative Endodontic Applications of Cone-Beam Computed TomographyRandy L. Ball, Joao V. Barbizam, and Nestor Cohenca

Society News 558

AAE Position Statement: Scope of Endodontics: Extraction of Teeth

560

AAE Position Statement: Scope of Endodontics: Dental Implants

561

AAE Position Statement: Scope of Endodontics: Regenerative Endodontics

565

Associate Registry