Accuracy of linear bone measurements with cone-beam and spiral computed tomography in human mandibles

Guilherme Teixeira Coelho Terra, Jefferson Xavier de Oliveira, Carlos Martins Agra, Antônio Carlos Guedes Pinto

Introduction: Availability of imaging methods able to accurately reproduce the maxillomandibular dimensions is important for diagnosis and safe planning of surgical procedures. Objective: The aim of this in vitro study was to verify the accuracy of linear measurements in images obtained with a system of spiral and two systems of cone-beam computed tomography (CT). Methods: Ten dry human mandibles were subjected to three different CT scans: i-CAT® CBCT, NewTom-3G® CBCT, and Picker® SCT. Measurements in the mandible were taken with a digital caliper and measurements in the images were taken with the ImplantViewer® software. Six regions were measured in each dry mandible, being distributed into two regions in each of the lower first molar (LFM), lower first pre-molar (LFPM), and lower lateral incisor (LLI) sites. Results: Similar accuracy was observed among the three images at sites LLI and LFPM. Measurements obtained with the i-CAT CBCT scan at site LFM were shown to be more accurate than those obtained with the other two CT scan systems. Conclusions: It can be concluded that the three CTs studied herein showed similar limits of agreement and precision at sites LLI and LFPM, and i-CAT CBCT showed limits of agreement with smaller amplitude and greater accuracy than other examinations performed at site LFM. Conclusion: It can be concluded that the three CTs studied herein showed similar limits of agreement and precision at sites LLI and LFPM, and i-CAT CBCT at site LFM showed limits of agreement with lower amplitude and greater accuracy than other examinations performed.

Keywords: Spiral computed tomography. Cone-beam computed tomography. Dental implants. Three-dimensional imaging.

How to cite: Terra GTC, Oliveira JX, Agra CM, Pinto ACG. Accuracy of linear bone measurements with cone-beam and spiral computed tomography in human mandibles. Dental Press Implantol. 2013 Apr-June;7(2):99-106.

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