Poster Presentation

Poster Presentation

PR46 - CBCT Evaluation of Initial Root Canal Treatment Failure Prior to Retreatment

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

Objectives: Cone beam computed tomography (CBCT) has allowed for a more accurate assessment of the periapical tissues following endodontic treatment. The aim of this study was to identify presenting factors and etiologies for failure of initial endodontic treatment using CBCT. Methods: A record search identified all endodontic retreatments completed at the University of Iowa College of Dentistry Department of Endodontics from 2012 to present in which a CBCT was made prior to initiation of the retreatment. Twenty-five variables were recorded by assessing the patient’s record and preoperative CBCT images. Descriptive and bivariate analyses were conducted to explore the factors associated with symptomatic patients and lesion sizes using chi-square test, Fisher’s exact test, and Wilcoxon rank-sum test (alpha=0.05). Results: One-hundred and fifty-nine patients (57.2% females) were identified from the record search. Of the patients, 56.6% were symptomatic and 38.4% had a missed canal at the retreatment evaluation appointment. Symptomatic patients had more flare-ups after retreatment compared to asymptomatic patients (6.7% vs. 0%, p=0.0364). Patients who responded positively to percussion tests had larger lesions (mean±SD=6.49±4.10 mm vs. 5.04±4.12 mm, p=0.0268), and more cortical plates were destroyed with larger lesions (mean±SD=8.52±3.75 vs. 4.37±3.63; p<0.0001). Moreover, patients with a diagnosis of CAA or AAA had larger lesion sizes (p<0.05). Conclusions: The use of CBCT has allowed for more accurate assessment of preoperative conditions that may influence success rates of endodontic retreatments. Future research is needed to determine how preoperative assessment of retreatment cases using CBCT influences decision-making and outcomes.

Zachary STEVEN.. Goettsche

Endodontic Resident
University of Iowa

BA, University of Iowa 2013. DDS, University of Iowa College of Dentistry and Dental Clinics 2016. Certificate Candidate, University of Iowa College of Dentistry and Dental Clinics, Endodontics Department 2018.

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Anne Williamson

Endodontic Grad Program Director
University of Iowa

DDS, University of Nebraska, 1984. Certificate, General Practice Residency, University of Nebraska, 1989. Certificate, Endodontics, University of Iowa, 2003. MS, Oral Science, The University of Iowa, 2004. Diplomate, American Board of Endodontics

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Fabricio Teixeira

Professor and Head, Department of Endodontics
University of Iowa

D.D.S., UGF - School of Dentistry (Rio de Janeiro, Brazil), 1993
AEGD, Unigranrio (Rio de Janeiro, Brazil), 1995
M.S.,Clinical Dentistry - Endodontics, State University of Campinas (Sao Paulo, Brazil), 1997
Ph.D., Oral Science - Endodontics, State University of Campinas (Sao Paulo, Brazil), 1999
Certificate, Endodontics, University of Texas Health Science Center (San Antonio, TX), 2009

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Fang Qian

Associate Research Scientist
University of Iowa

M.A., City University of New York, Hunter College, 1989
M. Phil., City University of New York, Graduate Center, 1990
Ph.D., City University of New York, Graduate Center, 1994

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