Author/Authors :
Safi, Yaser Oral and Maxillofacial Radiology Department - Dental School, Shahid Beheshti University of Medical Sciences, Tehran , Hosseinpour, Sepanta Students' Research Committee - Dental School, Shahid Beheshti University of Medical Sciences, Tehran , Aziz, Alireza Oral and Dental Disease Research Center - Zahedan University of Medical Sciences, Zahedan , Bamedi, Masoud Dentist, Tehran , Malekashtari, Mahsa Oral and Dental Disease Research Center - Zahedan University of Medical Sciences, Zahedan , Vasegh, Zahra Oral and Maxillofacial Radiology Department - Dental School, Shahid Beheshti University of Medical Sciences, Tehran
Abstract :
Introduction: This study sought to assess the effects of amperage (mA) and field of
view (FOV) on intracanal metal post artifacts and the diagnostic parameters for
detection of vertical root fracture (VRF) in teeth with intracanal posts. Methods and
Materials: In this diagnostic study, 80 human single-canal teeth were evaluated by
cone-beam computed tomography (CBCT). Nickel chrome cast posts were placed into
root canals after root canal therapy and canal preparation. In the test group, fracture
was induced by an instron machine while no fracture was induced in the control group.
Deterministic and probabilistic sensitivity and specificity values at different exposure
settings were statistically analyzed using the one-way ANOVA and pairwise
comparisons were performed by Tukey’s test. Results: Significant differences were
found between the two groups in terms of deterministic (P<0.0001) and probabilistic
(P<0.013) sensitivity and deterministic (P<0.037) and probabilistic (P<0.0001)
specificity at different FOV and mA combinations. Conclusion: A smaller FOV and
lower mA should be preferably used for detection of VRFs in teeth with intracanal posts.
Keywords :
Amperage , Cone-Beam Computed Tomography , Field of View , Metal Artifact , Vertical Root Fracture
