Poster Presentation

Poster Presentation

PR21 - Effect of Different Crown Preparation Types on Pulp Chamber Proximity in Calcified Mandibular Molars: A Micro-CT Study

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

Objectives: This study investigated the three-dimensional (3D) anatomy of the pulp chamber, it’s relationship to the outer surface of the tooth and computer-generated remaining dental thicknesses (RDT) after different types of crown preparations. Methods: Forty-five calcified mandibular molars, with less than 2 mm pulp chamber height, were scanned with μCT. 3D reconstructions were performed and landmarks created in the axial view in relation to the cemento-enamel junction (CEJ) plane: cusp tips (L1); central fossa (L2); highest point (L3) and outer most extent (L4) of each pulp horn; pulp chamber roof (L5) and axial chamber wall at the CEJ (L6). All measurements were performed for mesio-buccal (MB), mesio-lingual (ML), disto-buccal (DB), and disto-lingual (DL) areas. Computer-generated ideal and maximum crown preparations for full cast (FC), porcelain-fused-to-metal (PFM) and all-ceramic (AC) crowns were overlaid on the unprepared tooth (UT) to determine the RDT from outer surface of the prepared tooth to pre-established landmarks. Data were analyzed using two-way repeated measures ANOVA and Student-Newman-Keuls post-hoc testing (α<0.05). Results: Statistically significant differences were found between the RDT for all crown types and preparation depths when compared to the UT (p<0.001). MB/L3 was exposed in several specimens for all crown preparation types; maximum PFM crown preparations showed the highest pulp exposure rate (~71%; -0.31 mm RDT) and ideal FC the lowest (~6.7%; 0.69 mm RDT) for the MB/L3 if anatomical inclines were not respected. Conclusion: Clinicians should be cognizant of the height of the MB pulp horn during crown preparations in calcified mandibular molars.

Dave A. Patel

Endodontic Resident
University of Tennessee

Dr. Dave Patel received his dental degree from Tufts University School of Dental Medicine in 2014. After graduation, he completed an AEGD residency at St. Joseph's hospital in Providence, RI. In 2016, Dr. Patel started a 24 month Post-Graduate Endodontic Program at the University of Tennessee Health Science Center.

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Adam Lloyd

Associate Professor and Chair Department of Endodontics
University of Tennessee

Dr. Adam Lloyd received his dental degree from Cardiff Dental School in 1994, followed by completion of an endodontic residency and masters in oral biology at Baylor College of Dentistry, Dallas, Tex. Dr. Lloyd taught at the University of California San Francisco and NSU College of Dental Medicine before his appointment as associate professor at the University of Tennessee Health Science Center College of Dentistry. He is currently the chair of the department of endodontics and the program director of the Advanced Specialty Education Program in Endodontics, having founded the residency program and built a state of the art facility in Memphis. Dr. Lloyd has received awards from the British Endodontic Society, including the Fred Harty medal and most recently has been recognized as an award winning educator by the American Association of Endodontists, receiving the 2010 Edward M. Osetek Educator award, the 2010 UTHSC SGAEC Excellence in Teaching Award and the faculty of the year award by the graduating class of 2015. At UTHSC his research is based on x-ray micro-focus computerized tomography and imaging modalities for canal preparation, obturation and disinfection. He has published in the endodontic literature and lectured internationally.

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Tom Korioth

Professor and Director of Fixed Prosthodontics

Dr. Tom V Korioth graduated from dental school from the Peruvian University “Cayetano Heredia” in 1984. He maintained a general dentistry practice for 3.5 years before enrolling in the PhD program in oral physiology at the University of British Columbia in Vancouver, Canada, where he successfully defended his doctoral thesis in 1992. From 1993 until 2002 Dr. Korioth was a full-time faculty member in Oral Sciences at the University of Minnesota and obtained his promotion to Associate Professor with tenure in 1998. From 1999 until 2002 Dr. Korioth specialized as Prosthodontist at the University of Minnesota. After a brief stint at NOVA SE University from 2002 until 2003, he worked full-time in specialized private practice in the Orlando, FL area until 2013, when he became a full-time Professor in Prosthodontics at the University of Tennessee Health Science Center at Memphis.

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Brian R. Morrow

Biomaterials Coordinator

Brian Morrow has a Bachelor of science and a Masters focused on spinal injuries. He is currently the Biomaterials Research Coordinator for the Bioscience Research Laboratory. He has vast knowledge of research methodology and statistics and has been mentoring and assisting student, post graduate residents and faculty in pursuing research projects for years at UTHSC.

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Melissa A. Marchesan

Associate Professor / Department of Endodontics
University of Tennessee

Dr Melissa A. Marchesan graduated dental school from the University of Sao Paulo in 1998. She pursued a Masters in Restorative Dentistry with focus in Endodontics and Lasers at the University of Sao Paulo. During 6 years Dr Marchesan engaged in teaching predoctoral and postgraduate students at the University of Ribeirao Preto (UNAERP) in Brazil. In 2007, she completed her PhD in Dentistry furthering her research in Endodontics and Lasers. From 2010 to 2014, Dr Marchesan held a position as an Associate Professor at Nova Southeastern University, Department of Endodontics and had a roll in predoctoral teaching and mentoring Graduate Endodontic resident research. In 2011, she received the Endodontic Educator Fellowship Award from the American Association of Endodontics and redid her Endodontic specialty in the United States. In 2014, she was recruited by the University of Tennessee Health Science Center, College of Dentistry, Department of Endodontics for an Associate Professor position. At which she develops research, mentors postgraduate Endodontic Residents and collaborates in predoctoral and postdoctoral teaching. She was appointed to represent the Resident and New practitioners on the American Association of Endodontists Foundation Board of Trustees.

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PR21 - Effect of Different Crown Preparation Types on Pulp Chamber Proximity in Calcified Mandibular Molars: A Micro-CT Study



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