Program including abstracts as pdf available here

OP 146
Title
FRACTuRES IN ROOT-FILLED PREMOLARS WITH POSTS: CONE bEAM CT ACCuRACy
aBSTracTS OP 14
Authors
F. HAITER-NETO 1 , R.I. FERREIRA 2 , G. bAHRAMI 3 , S. ISIDOR 3 , A. WENzEL 3 , F.C. GROPPO 1
Affiliations
1 University of Campinas, Piracicaba, BRAZIL, 2 University of Sao paulo City, Sao Paulo, BRA-
ZIL, 3 university of Aahurs, Aahrus, DENMARK
Body
Objective: To assess diagnostic accuracy for detecting vertical root fractures in root-filled
teeth with fiber-resin and titanium posts using cone beam CT (CBCT). Methods: CBCT scans
were acquired of 59 root-filled extracted human premolars provided with fiber-resin (n=30) or
titanium (n=29) posts before and after the induction of non-displaced vertical root fractures
using the Scanora 3D and i-CAT CBCT systems. Six oral-maxillofacial radiologists assessed
the CBCT axial, sagittal and coronal sections interactively for the presence/absence of root
fracture using OnDemand 3D software. Interobserver agreement was analyzed using Kappa
(K) statistics. Sensitivity, specificity and overall accuracy as well as positive and negative predictive
values were calculated. The diagnostic accuracy variables were compared between the
CBCT systems and post types using ANOVA and subsequently student-Newman-Keul’s multiplecomparison
test (α=0.05). Results: Interobserver agreement for fiber-resin posts ranged from
0.50-0.70 (Scanora 3D) and 0.35-0.76 (i-CAT) whereas for titanium posts, the k coefficients
varied from 0.42-0.80 (Scanora 3D) and 0.31-0.73 (i-CAT). Post type had a significant
effect on sensitivity and negative predictive value. Statistically significant higher sensitivity
(0.85±0.04; P