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Three-dimensional comparison of 2 digital models obtained from cone-beam computed tomographic scans of polyvinyl siloxane impressions and plaster models
- Source :
- Imaging Science in Dentistry
- Publication Year :
- 2019
- Publisher :
- Korean Academy of Oral and Maxillofacial Radiology, 2019.
-
Abstract
- Purpose This study was performed to evaluate the dimensional accuracy of digital dental models constructed from cone-beam computed tomographic (CBCT) scans of polyvinyl siloxane (PVS) impressions and cast scan models. Materials and Methods A pair of PVS impressions was obtained from 20 subjects and scanned using CBCT (resolution, 0.1 mm). A cast scan model was constructed by scanning the gypsum model using a model scanner. After reconstruction of the digital models, the mesio-distal width of each tooth, inter-canine width, and inter-molar width were measured, and the Bolton ratios were calculated and compared. The 2 models were superimposed and the difference between the models was measured using 3-dimensional analysis. Results The range of mean error between the cast scan model and the CBCT scan model was −0.15 mm to 0.13 mm in the mesio-distal width of the teeth and 0.03 mm to 0.42 mm in the width analysis. The differences in the Bolton ratios between the cast scan models and CBCT scan models were 0.87 (anterior ratio) and 0.72 (overall ratio), with no significant difference (P>0.05). The mean maxillary and mandibular difference when the cast scan model and the CBCT scan model were superimposed was 53 µm. Conclusion There was no statistically significant difference in most of the measurements. The maximum tooth size difference was 0.15 mm, and the average difference in model overlap was 53 µm. Digital models produced by scanning impressions at a high resolution using CBCT can be used in clinical practice.
- Subjects :
- Cone beam computed tomography
Scanner
Materials science
Radiological and Ultrasound Technology
Significant difference
Orthodontics
030206 dentistry
Cone-Beam Computed Tomography
030218 nuclear medicine & medical imaging
Computed tomographic
Clinical Practice
03 medical and health sciences
Polyvinyl siloxane
0302 clinical medicine
stomatognathic system
Beam (nautical)
Original Article
Radiology, Nuclear Medicine and imaging
TOOTH SIZE
Dental Models
General Dentistry
Biomedical engineering
Subjects
Details
- ISSN :
- 22337830 and 22337822
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Imaging Science in Dentistry
- Accession number :
- edsair.doi.dedup.....7725371327505d2e2e22242dbab3a610