ADA News

Washington—The ADA presented or participated in more than 30 scientific presentations and informational sessions during the American Association for Dental Research’s 39th General Session & Exhibition March 3-6.

Team work: Dr. Akiyoshi Sugawara, a PRC collaborator from Nihon University in Tokyo, points to his poster as the PRC’s Shozo Takagi, Ph.D, looks on.

More than 1,500 scientific abstracts, including 350 oral and 1,086 poster presentations, were presented with some 2,500 professionals representing 37 countries in attendance. The meeting was also the site of 34th annual meeting of the Canadian Association for Dental Research.

During the meeting, the ADA Foundation Paffenbarger Research Center, located in Gaithersburg, Md., and part of the ADA Division of Science, presented the following:

• Sugar-Alcohol Eutectics for Use in Synthesis of Novel Vinylbenzyl Ethers Synthesis of Novel Vinylbenzyl Ethers;
• Analysis of Bioavailable Fluoride from a 1-min Dentifrice Slurry;
• Screening for Dental Erosive Capacity—Correlation of Two Methods;
• Comparative Studies of P-CPC and Conventional Endodontic Cements on Mineralization;
• Histopathological and X-ray Micro-CT Studies of Premixed CPC for Bone-Graft;
• Histopathological Study of Dual-Paste Premixed CPC Used for Bone Defect;
• Dentin Permeability Reduction by a Fluoride-calcium-phosphate Treatment;
• Umbilical-Cord Stem Cell Seeding on Fast-Dissolution Calcium Phosphate Bone Cements;
• Confirmation: CaF2 Not Found in Plaque After NaF Rinse;
• Fluoride Deposition by Calcium and L-aspartic Acid Containing Fluoride Varnishes;
• Remineralization of Natural and Artificial Carious Dentin Lesions in vitro;
• Biodegradable Protective Resin Coatings for Early Lesions and Hypersensitive Teeth;
• Effects of Fluorinated Additives on Physical Properties of Composite Resins;
• Microleakage of an experimental resin-based ACP Endodontic Sealer;
• An Evaluation of Stress Concentrations in All-Ceramic Bridge Designs;
• What is the Real Fracture Toughness of Human Enamel?;
• Fracture Origins in a Commercial Indirect Dental Resin Composite;
• Keynote Address: Practical Application of Fracture Mechanics to Restoration Failure Analysis;
• Controlling Cell Orientation Via Experimental Gratings;
• Fluoride-Releasing Materials: pH Effects on Mechanical Properties and Ion Release;
• Rapid Setting Tetracalcium Phosphate (TTCP)-based Cements;
• Synthesis and Characterization of Amorphous Calcium Chlorhexidine Phosphates Fluoride.

Legend: Dr. Rafael Bowen of PRC at AADR in March.

PRC staff who presented research were Dr. Gary Schumacher; Clifton M. Carey, Ph.D.; Dr. Rafael Bowen; Drago Skirtic; Gerald Vogel, Ph.D.; Cher Davis; Dr. Sabine Dickens; Glenn Flaim; Kathleen Hoffman; Burton Schmuck; Ming S. Tung, Ph.D.; Jirun Sun, Ph.D.; Limin Sun, Ph.D.; Dr. Maria Cherng; Larry Chow, Ph.D.; Shozo Takagi, Ph.D.; Dr. Bin Yang; and Justin O’Donnell.

PRC associates included: George Quinn, Dwayne Arola, Ph.D., and Janet Quinn, Ph.D. (Note: Dr. Janet Quinn was the principal investigator on Fracture Origins in a Commercial Indirect Dental Resin Composite before her death in July 2008.)

Additionally, PRC interns Brian Wisowaty, Jennifer Johnson, Anish Parikh, Charles Herbert, Jason Verhoef and Alice Chuang contributed to the ADA research effort.

Presenters and collaborators from outside organizations included:

Joseph M. Antonucci, Ph.D., Sheng-Lin Gibson, Ph.D., Nancy Lin, Ph.D., Yifu Ding, Ph.D., Hyun Ro, Jing Zhou, Ph.D., Christopher Soles, Ph.D., and Marcus Cicerone, Ph.D. from the National Institute of Standards; and Jennifer Moreau, Huakun Xu, Ph.D. and Dr. Howard Strassler from the University of Maryland Baltimore College of Dental Surgery collaborated with PRC.

Members of the ADA Division of Science in Chicago presented the following:

• "Fracture Toughness and Work of Composites Utilizing Pre-Crack Method";
• "Irradiance of Nine Curing Lights at 2 mm and 9 mm Distance";
• "Using the MIC Test for Antimicrobial Evaluation of Root Canal Irrigants";
• "A Novel Testing System and Method to Evaluate Polishing Instruments";
• "Evaluation of Six Different Polishing Systems Using Novel Polishing Apparatus";
• "Comparison of Viscosities of Flowable Composites to Warmed Posterior Composites".

Presents: Richard Geary of the Chicago Science staff and his poster, Irradiance of Nine Curing Lights at 2 mm and 9 mm Distance, during the American Association for Dental Research’s 39th General Session & Exhibition.

Chicago staff who contributed to the research of these presentations were Amer Tiba, Ph.D.; Richard Geary; Spiro Megremis, Ph.D.; Steve Gruninger; Nik Njegovan; and Dr. John Kuehne.

Tom Wall and Brad Munson of the ADA HPRC/Survey Center in Chicago presented, Recent Trends in Dental Visits—2003 to 2008 and General Practitioner Fee Variation by County Affluence, Density, GP Age, respectively.

For more information, contact the ADA Division of Science at Ext. 2878 or by e-mail at science@ada.org. For questions concerning PRC presentations, call 1-301-975-6806 or e-mail PRC@ada.org.