Abstract
Introduction
This study evaluated the performance of the metal artifact reduction (MAR) tool in
cone-beam computed tomographic scans using different fields of view (FOVs) in the
detection of a root isthmus in mandibular molars with intraradicular posts.
Methods
Twenty-eight teeth were scanned by micro–computed tomographic imaging (gold standard
images). Thereafter, specimens were allocated into the following groups: gutta-percha
(teeth without posts, n = 10), a prefabricated metal post (n = 9), and a fiberglass post (n = 9). Cone-beam computed tomographic scans were taken using 8 acquisition protocols,
varying the size of the FOV (10 × 5.5 cm and 5 × 5.5 cm) and the MAR tool (disabled,
low, normal, and high modes). A root isthmus was evaluated considering a 5-point scale.
Data were analyzed considering a 5% significance level.
Results
Intra- and interexaminer agreement varied from moderate to substantial. The frequency
of correct diagnosis varied significantly in all groups regardless of the image acquisition
protocol selected (P < .05). In the gutta-percha group, there was no difference in the accuracy, sensitivity,
and specificity values between the tested protocols. In the metal and fiberglass post
groups, the accuracy values were higher with the “disabled” and “low” modes of the
MAR tool regardless of the FOV size. This was also observed for the sensitivity values
in the metal post group (P < .05).
Conclusions
The size of the FOV did not affect the performance of the MAR tool in the diagnosis
of a root isthmus in molars with intraradicular posts. Our findings suggest that the
use of the tool in the “normal” and “high” modes is contraindicated for this purpose.
Key Words
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References
- Prevalence of middle mesial canals and isthmi in the mesial root of mandibular molars: an in vivo cone-beam computed tomographic study.J Endod. 2017; 43: 1080-1083
- The isthmuses of the mesial root of mandibular molars: a micro-computed tomographic study.Int Endod J. 2005; 38: 558-563
- A micro-computed tomographic study of bandshaped root canal isthmuses, having their floor in the apical third of mesial roots of mandibular first molars.Int Endod J. 2018; 51: 240-246
- Accuracy of high-resolution small-volume cone-beam computed tomography in detecting complex anatomy of the apical isthmi: ex vivo analysis.J Endod. 2018; 44: 1862-1866
- Evaluation and reduction of artifacts generated by 4 different root-end filling materials by using multiple cone-beam computed tomography imaging settings.J Endod. 2016; 42: 307-314
- Ability to detect endodontic complications using three different cone beam computed tomography units with and without artefact reduction modes: an ex vivo study.Int Endod J. 2019; 52: 725-736
- AAE and AAOMR joint position statement: Use of cone beam computed tomography in Endodontics 2015 update.Oral Surg Oral Med Oral Pathol Oral Radiol. 2015; 120: 508-512
- European Society of Endodontology position statement: use of cone beam computed tomography in endodontics.Int Endod J. 2019; 52: 1675-1678
- Influence of the artefact reduction algorithm of Picasso Trio CBCT system on the diagnosis of vertical root fractures in teeth with metal posts.Dentomaxillofac Radiol. 2015; 44: 20140428
- Assessment of furcal perforations in the vicinity of different root canal sealers using a cone beam computed tomography system with and without the application of artifact reduction mode: an ex vivo investigation on extracted human teeth.Oral Surg Oral Med Oral Pathol Oral Radiol. 2016; 121: 657-665
- Quantitative assessment of image artifacts from root filling materials on CBCT scans made using several exposure parameters.Imaging Sci Dent. 2017; 47: 189-197
- The efficacy of metal artifact reduction mode in cone-beam computed tomography images on diagnostic accuracy of root fractures in teeth with intracanal posts.Iran Endod J. 2018; 13: 47-53
- Evaluation of the efficacy of a metal artifact reduction algorithm in different cone beam computed tomography scanning parameters.Oral Surg Oral Med Oral Pathol Oral Radiol. 2017; 123: 729-734
- The performance of metal artifact reduction algorithms in cone beam computed tomography images considering the effects of materials, metal positions, and fields of view.Oral Surg Oral Med Oral Pathol Oral Radiol. 2019; 127: 71-76
- Assessment of buccal marginal alveolar peri-implant and periodontal defects using a cone beam CT system with and without the application of metal artefact reduction mode.Dentomaxillofac Radiol. 2013; 42: 20130176
- Are metal artefact reduction algorithms effective to correct cone beam CT artefacts arising from the exomass?.Dentomaxillofac Radiol. 2019; 48: 20180290
- Use of the metal artefact reduction tool in the identification of fractured endodontic instruments in cone-beam computed tomography.Int Endod J. 2020; 53: 506-512
- Comparison of linear and volumetric measurements obtained from periodontal defects by using cone beam-CT and micro-CT: an in vitro study.Clin Oral Investig. 2019; 23: 2235-2244
- The measurement of observer agreement for categorical data.Biometrics. 1977; 33: 159-174
- Mandibular mesial root canal morphology using micro-computed tomography in a Brazilian population.Aust Endod J. 2019; 45: 51-56
- Limitation of diagnostic value of cone-beam CT in detecting apical root isthmuses.J Appl Oral Sci. 2020; 28: e20190168
- Unprepared root canal surface areas: causes, clinical implications, and therapeutic strategies.Braz Dent J. 2018; 32: e65
- Does the metal artifact reduction algorithm activation mode influence the magnitude of artifacts in CBCT images?.Imaging Sci Dent. 2020; 50: 23-30
- Magnitude of beam-hardening artifacts produced by gutta-percha and metal posts on cone-beam computed tomography with varying tube current.Imaging Sci Dent. 2020; 50: 1-7
- Spatial resolution in CBCT machines for dental/maxillofacial applications—what do we know today?.Dentomaxillofac Radiol. 2015; 44: 20140204
- Quantitative evaluation of metal artifacts using different CBCT devices, high-density materials and field of views.Clin Oral Implants Res. 2017; 28: 1509-1514
- Influence of the intracanal material and metal artifact reduction tool in the detection of the second mesiobuccal canal in cone-beam computed tomographic examinations.J Endod. 2020; 46: 1067-1073
Article info
Publication history
Published online: July 11, 2021
Identification
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© 2021 American Association of Endodontists.
