Location: 1180 Postle Hall
Is the Polymerization Stress Produced During the Curing of Dental Composite Restorations Clinically Meaningful?
Jack Ferracane, PhD
The application of light curing to cause the polymerization of a dental composite restoration produces a volumetric contraction within the material that creates stress on the surrounding tooth structure to which it is bonded. There is extensive evidence for the presence of this polymerization contraction stress in dental composites, as well as evidence for its deleterious effects, which include marginal leakage, gap formation, cusp deflection, tooth cracking, reduced bond strength and lowered mechanical properties of the restorative. The concern over these stresses and the manner in which they influence the placement of current composite materials demonstrates that they are considered to be very important. Manufacturers have spent considerable effort to develop lower shrinking or lower shrinkage stress composites, especially for use in bulk fill applications. But what evidence exists that these stresses actually have a direct effect on the clinical performance and longevity of dental composite restorations? The factors causing the stress, the methods proposed to minimize it, and the relation between contraction stress and clinical outcomes will be discussed.
Jack Ferracane is Professor and Chair of Restorative Dentistry, and Division Director of Biomaterials and Biomechanics at Oregon Health & Science University, Portland, Oregon. Dr. Ferracane received a B.S. in Biology from the University of Illinois, and an M.S. and Ph.D. in Biological Materials from Northwestern University. He is a founding fellow and past-President of the Academy of Dental Materials. He is a past-President of the Dental Materials Group of the International Association for Dental Research. He is a past-President of the American Association for Dental Research. He is the recipient of the Wilmer Souder Award from the Dental Materials Group of the IADR, the Founders Award from the Academy of Dental Materials, and the Hollenback Award from the Academy of Operative Dentistry. He is an honorary member of the American College of Dentists and the Oregon Dental Association. He has recently been inducted as a fellow of the American Institute of Medical and Biological Engineering. He serves on the editorial board of ten journals, and is Associate Editor of the Journal of Dental Research and Odontology. He serves as a regular member of the Oral, Dental and Craniofacial Sciences Study Section [ODCS] of the NIH/NIDCR. He has authored a textbook entitled “Materials in Dentistry. Principles and Applications.” He is a co-editor of a textbook entitled “Summitt’s Fundamentals of Operative Dentistry. A Contemporary Approach,” now in its fourth edition. He has published and lectured extensively on dental materials, including dental composites, adhesives, amalgam, and practice-based dental research. He has provided continuing education at annual meetings of the ADA, British Dental Association, California Dental Association, Chicago Midwinter, Midwest Dental Conference, Oregon Dental Conference, Pacific NW Dental Conference, Southwest Dental Conference, Yankee Dental Congress, and to other professional dental organizations. His current research interests are in developing new monomers for enhanced dental composites, studying the factors that affect biofilm formation around dental composite restorations leading to the recurrence of caries lesions, and the use of bioactive glasses as potential antimicrobial and remineralizing agents in resin-based dental materials. His research is funded by the NIH/NIDCR as well as private industry. He also is actively involved in the establishment and operation of networks designed to conduct dental clinical research in the private practice setting, and is currently involved in a large scale clinical study in the NIH-funded National Dental Practice-based Research Network (NDPBRN) investigating the characteristics and progression of cracked teeth.
Lunch will be provided. For more information: 614-688-3435 or firstname.lastname@example.org.
One CE credit available.