Evaluation of CBCT Digital Models and Traditional Models Using the Little's Index

Kau, Chung How; Littlefield, Jay; Rainy, Neal; Nguyen, Jennifer; Creed, Ben

doi:10.2319/083109-491.1

Cited by 75 publications

(59 citation statements)

References 13 publications

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“…Inter-and intra-operator reliability were acceptable, while more care may be needed for CBCT measurements, as also underlined by previous studies [3,4]. The results are promising, nevertheless further evaluations on a larger sample are advised.…”

Section: Resultssupporting

confidence: 54%

Are Dental Measurements Taken on Plaster Casts Comparable to Those Taken From CBCT Images and Laser Scanned Surfaces?

Pisoni¹,

Codari²,

Galli³

et al. 2018

EDUJ

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Introduction: Intraoral scanning techniques, laser scans and cone-beam computed tomography (CBCT) are becoming widely diffused in dental practice. These instruments can replace dental plaster casts with digital models; recent investigations have found that measurements taken on digital models do not differ clinically from those obtained on CBCT scans and physical models, but only intra-examiner reliability has been assessed. In the current study we tested both intra-and inter-examiner variations, together with intertechniques reliability. Methodology: Data from six adult subjects were retrospectively obtained. Twelve dental distances were measured on dental plaster casts using a digital calliper; on digital 3D CBCT images using inVivoDental software (Anatomage, San Jose, CA); and on laser scanned surfaces using Mirror Vectra Software (Canfield Scientific, Fairfield, NJ). Two different operators performed all measurements twice. Bland-Altman analysis, Kruskal-Wallis and Wilcoxon tests were used for comparisons. Results:The intra-and inter-operator biases range was 0-0.34 mm. The reproducibility range was 72-99%. The three different techniques gave very similar measurements, with biases between ±0.1 mm. Reproducibility ranged between 90 and 100%; the best reproducibility coefficients were found between plaster and digital casts, and only three differences were larger than 0.5 mm. Calliper measurements slightly overestimated digital casts values. Only the mesiodistal distance of tooth 24 (p=0.002) was significantly different among techniques. Conclusion: Measurements on digital dental models and CBCT reconstructions of the dental arches seem clinically reliable as direct calliper measurements. The inter-and intra-operator reliabilities were acceptable, some more care may be needed for CBCT measurements.

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Section: Resultssupporting

confidence: 54%

Are Dental Measurements Taken on Plaster Casts Comparable to Those Taken From CBCT Images and Laser Scanned Surfaces?

Pisoni¹,

Codari²,

Galli³

et al. 2018

EDUJ

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show abstract

“…Furthermore, Kau et al 15 present a strong advantage of CBCT technology over the digital models in offering various diagnostic information such as bone levels, root positions, and temporomandibular joint status that are not provided by the digital models. Kau et al 15 also suggest the diagnostic usefulness of CBCT images are useful in assessing. unerupted tooth position and supernumerary teeth.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of laser-scanned models compared to plaster models and cone-beam computed tomography

Kim

Heo

Lagravère

2013

The Angle Orthodontist

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Objective: To compare the accuracy of measurements obtained from the three-dimensional (3D) laser scans to those taken from the cone-beam computed tomography (CBCT) scans and those obtained from plaster models. Materials and Methods: Eighteen different measurements, encompassing mesiodistal width of teeth and both maxillary and mandibular arch length and width, were selected using various landmarks. CBCT scans and plaster models were prepared from 60 patients. Plaster models were scanned using the Ortho Insight 3D laser scanner, and the selected landmarks were measured using its software. CBCT scans were imported and analyzed using the Avizo software, and the 26 landmarks corresponding to the selected measurements were located and recorded. The plaster models were also measured using a digital caliper. Descriptive statistics and intraclass correlation coefficient (ICC) were used to analyze the data. Results: The ICC result showed that the values obtained by the three different methods were highly correlated in all measurements, all having correlations .0.808. When checking the differences between values and methods, the largest mean difference found was 0.59 mm 6 0.38 mm. Conclusions: In conclusion, plaster models, CBCT models, and laser-scanned models are three different diagnostic records, each with its own advantages and disadvantages. The present results showed that the laser-scanned models are highly accurate to plaster models and CBCT scans. This gives general clinicians an alternative to take into consideration the advantages of laser-scanned models over plaster models and CBCT reconstructions. (Angle Orthod. 2014;84:443-450.)

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“…The accuracy of linear measurements of the dentition on these Anatomodels for orthodontic purposes has been reported in 4 articles. [8][9][10][11] According to these publications, the accuracy of measurements on Anatomodels is related to the voxel size and spatial resolution of the CBCT images. Reduction of the spatial resolution can result in a lowerquality image, more noise and artifacts, and less anatomic information.…”

mentioning

confidence: 98%

Reproducibility and accuracy of linear measurements on dental models derived from cone-beam computed tomography compared with digital dental casts

Waard

Rangel

Fudalej

et al. 2014

American Journal of Orthodontics and Dentofacial Orthopedics

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Evaluation of CBCT Digital Models and Traditional Models Using the Little's Index

Cited by 75 publications

References 13 publications

Are Dental Measurements Taken on Plaster Casts Comparable to Those Taken From CBCT Images and Laser Scanned Surfaces?

Are Dental Measurements Taken on Plaster Casts Comparable to Those Taken From CBCT Images and Laser Scanned Surfaces?

Accuracy of laser-scanned models compared to plaster models and cone-beam computed tomography

Reproducibility and accuracy of linear measurements on dental models derived from cone-beam computed tomography compared with digital dental casts

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