Preoperative Factors Associated with Anesthesia Failure for Patients Undergoing Nonsurgical Root Canal Therapy: A National Dental Practice-Based Research Network Study

Dr. Ronald Ordinola Zapata is an Associate Professor at the Endodontic Division University of Minnesota School of Dentistry. Dr. Zapata completed his Endodontic residency program at the IB Bender Endodontic Division, Albert Einstein Medical Center in Philadelphia, (2018), and a Certificate in Clinical Research at the School of Public Health, University of Minnesota. In 2021 Dr. Zapata achieved the Diplomate status of the American Board of Endodontics. Dr. Zapata enjoys teaching, writing scientific papers, and documenting challenging cases. In his academic career, Dr. Zapata has published more than 100 scientific papers in peer-reviewed journals and lectured internationally in more than 10 countries. Dr. Zapata also serves as Associate Editor of the International Endodontic Journal (UK) and is a member of the Scientific Advisory Board of the Journal of Endodontics (USA).

Dr. Scott B. McClanahan received his D.D.S. from the University of North Carolina at Chapel Hill in 1981 and entered the U.S. Navy. As an out service resident, he completed his certificate of residency in endodontics at Northwestern University Dental School and received a M.S. from Northwestern University in 1989. After three tours of duty as a clinical endodontist, Dr. McClanahan was assigned to the faculty of the Endodontics Department at the Naval Postgraduate Dental School (NPDS), Bethesda, MD in 1998 and in 2001, assumed the responsibilities of Chairman of the Endodontics Department and Director of the Advanced Specialty Education Program in Endodontics. He retired from active duty in September 2005 and in November, joined the faculty at the University of Minnesota, School of Dentistry where he is holds the academic rank of Professor and is the Director of the Division of Endodontics and Director of Graduate Endodontics. He is a Diplomate of the American Board of Endodontics and a director of the board 2013-9 as well as the current board president. Dr. McClanahan is a Fellow of the International College of Dentists.

Dr. Alan Law received his Doctor of Dental Surgery and Certificate in Endodontics from the University of Iowa College of Dentistry, Iowa City, Iowa. He also completed his PhD, “Mechanisms and Modulation of Orofacial Pain”, with the Department of Pharmacology at the University of Iowa. Dr. Law has published over 40 articles in scientific and clinical journals, and has co-authored chapters on The Non-Odontogenic Toothache and Regenerative Endodontics in Pathways of the Pulp, and has lectured at over 300 local, national and international meetings. Dr. Law is a member the American Dental Association, American Association of Endodontics, and Omicron Kappa Upsilon Dental Honor Society, and a Fellow of the American College of Dentists and the International College of Dentists. He is a Past President of the American Association of Endodontists, Past President of the Minnesota Association of Endodontists, and Past President of the American Board of Endodontics. He is in full –time practice in the Twin Cities, and President of The Dental Specialists, a multi-specialty dental practice with over 35 specialists. He is also a Research Professor in the Division of Endodontics at the University of Minnesota.

After graduating from the University of Alberta Faculty of Dentistry, Dr. Nixdorf completed hospital dentistry residency at The Ohio State University, Anesthesia fellowship at Johns Hopkins University, Orofacial Pain fellowship at the University of Alberta, and a Master of Science in Clinical Research at the University of Minnesota. As a Diplomate of the National Dental Board of Anesthesiology (NDBA) and the American Board of Orofacial Pain (ABOP), he maintains a specialty Orofacial Pain practice on the diagnoses and management of chronic TMD pain, headaches, and neuropathic pain within multi-disciplinary settings. Dr. Nixdorf’s research has focused on the topics of non-odontogenic “tooth” pain from a classification, diagnosis, epidemiology, and treatment perspectives, as well as TMD and, most recently, dental MRI, with over 85 published articles. Dr. Nixdorf is Professor, Division Director, and past Graduate Program Director at the University of Minnesota in the Division of TMD & Orofacial Pain.