Poster Presentation

Poster Presentation

PR56 - The Effect of Instrumentation Taper on Dentin Conservation

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

Introduction: The purpose of this study was to compare and evaluate the amount of dentin removed after instrumentation using .04 tapered files versus .06 tapered files (Edge Evolve®). Methods: 10 maxillary premolars with root canal curvature less than 30 degrees were mounted in an acrylic resin filled K-cube and sectioned horizontally at 3, 6, 9, and 12 mm increments from the apices. The K-cube is a device which allows the investigator to disassemble and then resassemble root slices in their original orientation. Dentin thickness was measured at each section in three dimensions using the Zeiss Discovery V20 stereomicroscope. The sections were then reassembled into the K-cube. The 10 premolar roots were separated into two groups. In group A, the buccal canals were instrumented with .04 tapered files and the lingual canals instrumented with .06 tapered files. In group B, the buccal canals were instrumented with .06 tapered files and the lingual canals were instrumented with .04 tapered files. Root sections were again separated, and the remaining dentin thickness was measured. An ANOVA test was performed to analyze the results of these two groups. Results: The amount of dentin removed was significantly different between the two tapers. Conclusion: .04 tapered files prepare root canals with a greater conservation of tooth structure.

Megan E. Green

Endodontic Resident
Virginia Commonwealth University

Dr. Megan Green is in the second year of her graduate endodontic program at Virginia Commonwealth University in Richmond, Virginia. She is a proud recipient of the AAE17 Dentsply Sirona Award for her table clinic, The Attenuation Effect of Single Spray Cotton Pellet Technique in Pulpal Sensibility Testing, along with her fellow coresident, Dr. Laura Garden. Dr. Green completed her dental school education in 2016 at The Dental College of Georgia at Augusta University, formerly known as Medical College of Georgia. Having been born and raised in Atlanta, GA, she plans to return to the Atlanta area to practice endodontics.


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Garry L. Myers

Graduate Program Director
Virginia Commonwealth University

Dr. Garry Myers currently serves as the graduate endodontic program director at Virginia
Commonwealth University in Richmond, Virginia. He completed his dental school
education at the University of Texas Health Science Center/ at San Antonio in 1985.
Following graduation Dr. Myers entered the USAF where he served for four years as a
general dentist before entering the endodontic residency program at Wilford Hall Medical
Center at Lackland AFB also in San Antonio. In 1998 after serving on active duty for 13
years, Dr. Myers left the USAF to enter private practice in Olympia, Washington where he
practiced for the next 16 years. In the summer of 2014, full time education entered the
picture when Dr. Myers accepted a position at VCU where he now works. He is currently
the president of the American Association of Endodontists having been involved over the
last nine years with various committees of the AAE as well as serving on the Board of


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C. Vaughn Mayo

Endodontist/ Part-Time Graduate Faculty
Virginia Commonwealth University

Dr. Mayo is a graduate of The University of Louisville School of Dentistry. After graduation, he served as a Lieutenant in the Navy and completed a General Practice Residency in Dentistry at Balboa Hospital in San Diego, California. Following his military service, he completed a two year Endodontic Residency at The University of Texas Health Science Center San Antonio where he received a Certificate in Endodontics.

Dr. Mayo teaches part time in the Endodontic Residency Program at the Virginia Commonwealth University School of Dentistry as an adjunct professor and is a specialist member of the American Association of Endodontists.


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Alvin Best

Virginia Commonwealth University

3/11–Present: Director of Faculty Research Development and Professor (Associate Professor
until 2013), Department of Periodontics, Virginia Commonwealth University
PhD, (1984) Biostatistics, Medical College of Virginia at Virginia Commonwealth University,
Richmond, VA USA
MA, (1978) Quantitative Psychology, L.L. Thurstone Psychometric Laboratory, University of
North Carolina, Chapel Hill, NC USA
BS, (1973) Mathematics and Psychology, University of Tennessee, Knoxville, TN USA.
Recipient of the Torchbearer award.


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PR56 - The Effect of Instrumentation Taper on Dentin Conservation

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