206. Mark Latta DMD, MS - Universal Adhesives, Etching, How to Read Literature
Jan 8, 2024
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Mark Latta, a seasoned researcher and former dean of Creighton University School of Dentistry, joins host Dr. Melissa Seibert to discuss the optimization of universal hese and bonding techniques in adhesive dentistry. Topics include the value and limitations of clinical trials and laboratory research in dentistry, the difficulties of comparing bond strength between different labs, achieving adhesion of acrylic-based adhesive systems to enamel, different phosphoric acid conditioning techniques, and the variations between acrylic monomers in composite materials and dentures.
Using Bosphoric acid is recommended for achieving a strong bond to enamel in adhesive dentistry.
When interpreting research findings, it is important to consider the context and limitations of the study.
Deep dives
Importance of Bosphoric acid in adhesive dentistry
Bosphoric acid is considered the best and most cost-effective method for achieving a strong bond to enamel in adhesive dentistry. Despite being an additional step, using Bosphoric acid is recommended for closing the enamel margin effectively.
Understanding the limitations of clinical trials and laboratory research
Clinical trials validate certain aspects and performance characteristics of dental materials, but they often have ideal conditions that may not reflect real-world scenarios. Laboratory studies control variables, but there are operator variables and nuances that may affect results. It is important to consider the context and limitations of research when interpreting its findings.
Challenges and considerations in universal adhesives
Universal adhesives are marketed as versatile solutions for direct and indirect restorative dentistry. However, they can be complex mixtures of hydrophobic and hydrophilic monomers, acidic monomers, structural monomers, and polymerization elements. While they offer flexibility in bonding to enamel and dentin, separate bonding promoters are recommended for optimal bonding to ceramics. Understanding the complexities and limitations of universal adhesives is crucial for making informed material choices.
Optimizing bond strength with selective etching and adequate polymerization
Selective etching with phosphoric acid for 15 to 20 seconds is still considered the best method for achieving the strongest bond to enamel. Under-polymerization of adhesive materials and composites can lead to leakage, recurrent caries, decreased mechanical properties, and increased wear susceptibility. Adequate polymerization requires sufficient light exposure from various angles to ensure complete curing of the restorative material and adhesive.
Mark A. Latta, D.M.D., M.S., professor of general dentistry,served as dean of the School of Dentistry from 2011 to 2021. Prior to the dean’s appointment, he served as the Associate Dean for Research at Creighton University School of Dentistry since 1995. He personally has been awarded more than 140 research grants on prosthetic dental restorative materials, adhesives and bonding and dental material clinical trials. A speaker and lecturer of international renown, he has published more than 85 manuscripts and more than 200 abstracts and presented at numerous state and national dental association meetings and throughout the world. Prior to joining Creighton, Latta served as director of Research and Development for the Trubyte Division of Dentsply International, York, PA. During his industrial career he contributed to or was responsible for more than 20 new dental product introductions and is an inventor or co-inventor of numerous patents. He earned his dental degree at the University of Pennsylvania School of Dental Medicine in 1983, and his master’s degree in oral biology from the University of Maryland Baltimore College of Dental Surgery in 1995. He also spent one year in hospital general practice residency at York Hospital, York, PA. Dr. Latta, a Fellow in the American College of Dentists and the International College of Dentists is also a member of Omicron Kappa Upsilon, the national honorary dental society. He has also served as president of the Dental Materials Group and the International Association for Dental Research.
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