Accuracy of Cone-beam Computed Tomographic Image Interpretation by Endodontists and Endodontic Residents
Abstract
Introduction
Limited
field cone-beam computed tomography (CBCT) imaging has become a
modality frequently used by endodontists to evaluate the teeth and
surrounding tissues of their patients. Accurate image interpretation is
vital to obtain needed treatment information as well as to discern
coincidental findings that could be present. The goal of this study was
to determine the accuracy of CBCT volume interpretation when performed
by endodontists and endodontic residents.
Methods
Eighteen
deidentified limited field CBCT scans were obtained and evaluated by an
oral and maxillofacial radiologist and an endodontist experienced in
reading CBCT images. Their collective findings were combined as the
“gold standard” of interpretation for this investigation. Using standard
CBCT software, 4 practicing endodontists and 5 second-year endodontic
residents evaluated each scan and recorded any notable findings and
whether or not each scan warranted referral to a radiology specialist.
Their interpretations were then compared with the gold standard to
determine accuracy and any significant differences among the groups.
Results
The overall accuracy was 58.3% for endodontists and 64.3% for residents. Paired t
tests showed no statistically significant differences in accuracy
between the 2 groups for findings in teeth or in bone, but residents
were significantly better for maxillary sinus findings. Endodontists
agreed with the gold standard 38.9% of the time and residents 49.8% of
the time on necessity of referral. The Cohen kappa coefficient showed
moderate agreement between the groups.
Conclusions
Endodontists
and residents had similar accuracy in CBCT scan evaluation. More
training and experience are warranted for both groups in order to
maximize image assessment accuracy.
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