Abstract
Introduction
This study aimed to evaluate substance loss and the time required for access cavity
preparation (ACP) using the conventional freehand method (CONV) versus a miniaturized
dynamic navigation system of real-time guided endodontics (RTGE) in an in vitro model using 3-dimensional–printed teeth.
Methods
Nine human anterior maxillary teeth were selected and micro–computed tomographic scanned.
Root canals were virtually reduced to 2 mm below the cementoenamel junction. The teeth
were digitally duplicated and mirrored to yield 6 different models with 6 single-rooted
teeth each. The models were 3-dimensionally printed using radiopaque resin and consecutively
mounted on a dental mannequin for ACP. Two operators with 12 and 2 years of clinical
experience, respectively, received 6 models (36 teeth) each and performed ACP on half
of the models using RTGE (after digital planning) and CONV on the other half 2 weeks
later. The time was recorded. Postoperative substance loss was measured by cone-beam
computed tomographic imaging. The differences in time and substance loss between the
methods and operators were evaluated by the t test.
Results
Overall, substance loss was significantly lower with RTGE than CONV (mean = 10.5 mm3 vs 29.7 mm3), but both procedures took a similar time per tooth (mean = 195 vs 193 seconds).
Operator 1 (more experienced) achieved significantly less substance loss than operator
2 with CONV (mean = 19.9 vs 39.4 mm3) but not with RTGE (mean = 10.3 vs 10.6 mm3).
Conclusions
RTGE is a practicable, substance-sparing method performed in comparable time as CONV.
Moreover, RTGE seems to be independent of operator experience.
Key Words:
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Article info
Publication history
Published online: July 22, 2021
Identification
Copyright
© 2021 American Association of Endodontists.
