Poster Presentation

Poster Presentation

PR48 - Cyclic Fatigue Testing: A Comparison of Non-Channel Versus a Novel Channel-Based Apparatus

Thursday, April 26
10:00 AM - 1:00 PM
Room: Exhibit Hall

Cyclic fatigue of nickel-titanium (NiTi) files has frequently been evaluated; however, there is no standardized method for evaluation. Many experimental models have been used to study the properties of NiTi files rotating around curvatures, yielding an array of results making it difficult for clinicians to compare file systems. The International Organization for Standardization (ISO) is currently developing a standardized testing protocol to evaluate the cyclic fatigue of NiTi files. The purpose of this study was to compare a non-channel and a novel channel-based cyclic fatigue testing apparatus using different commercially available file systems. Two hundred twenty dental files were tested to failure using a novel channel based method (n=110) and a non-channel method (n=110), and the length of the fractured tip was recorded for each file. The median number of cycles to failure (NCF) for the novel channel method was 814 (IQR=571) and 337 (IQR=279) for the non- channel method. A Mann-Whitney test indicated that the NCF as measured by the novel channel based method was significantly greater than for the non-channel based method, PP2=0.30. Different testing methods can yield different results when evaluating  commercially available file systems. The development of a standardized cyclic fatigue testing protocol could ensure that rotary NiTi files can be accurately compared and manufactured within an acceptable margin of safety.

Claire Anderson

Resident
US Army Dental Activity, Ft Bragg

Claire Anderson is originally from the great state of Mississippi. She received a Bachelors in Science from Birmingham-Southern University in Birmingham, Alabama before attending the Arizona School of Dentistry and Oral Health in Mesa, Arizona. She completed a 1 year Advanced Education in General Dentistry residency with the US Army Ft. Campbell, Kentucky before being assigned to the 3rd Infantry Division. While serving with the 3ID, CPT Anderson completed 3 operational tours abroad and stateside. After 2 years of dentistry a field unit, Dr. Anderson started her endodontic training at Ft. Bragg, North Carolina.

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Dan Halpin

Engineering Research Assistant

Dan Halpin serves as an engineering research assistant in the Research and Laboratories Department at the American Dental Association in Chicago, Illinois. His engineering and incredible troubleshooting skills were invaluable to this project.

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Daniel D. Kersten

Program Director
US Army Dental Activity, Ft Bragg

Dr. Dan Kersten is the Program Director of the Endodontic Residency Program at Fort Bragg, NC. He is also an Associate Professor for the Uniformed Services University of the Health Sciences. Dr. Kersten's previous teaching positions include Assistant Program Director of the Endodontic Residency Program at Fort Bragg, NC, and the Endodontic Mentor for the AEGD Program at Fort Campbell, KY. Dr. Kersten is a Diplomate of the American Board of Endodontics and received his Certificate of Endodontics from the Endodontic Residency Program at Fort Bragg, NC. Dr. Kersten is a 2003 graduate of the University of Minnesota School of Dentistry.

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Steven Delgado

Assistant Director at Ft. Bragg Endodontic Residency
US Army Dental Activity, Ft Bragg

Dr. Steven Delgado is the Assistant Program Director of the Endodontic Residence Program at Fort Bragg, NC. He is also an Assistant Professor for the Uniformed Services University of the Health Sciences. Dr. Delgado's previous teaching positions include the Endodontic Mentor for the 2 year AEGD Program at Fort Hood, TX and Assistant Clinical Professor at the University of Maryland at Baltimore. He received his DDS (2003) and Certificate of Endodontics (2005) from the University of Maryland at Baltimore.

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Thomas A. Beltran

Statistician
Womack Army Medical Center, Fort Bragg, NC

Mr. Thomas Beltran has a Bachelor of Science in Mathematics from the University of Texas at San Antonio. He spent eight years as a research psychologist for the Air Force and is currently a Statistician for the Department of Clinical Investigations at Womack Army Medical Center at Fort Bragg, NC.

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