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Comparative Study
. 2012 Mar;41(3):185-91.
doi: 10.1259/dmfr/24985971.

A comparative study of accuracy of detection of surface osseous changes in the temporomandibular joint using multidetector CT and cone beam CT

E H Zain-Alabdeen  1 , R I Alsadhan
Affiliations
Comparative Study

A comparative study of accuracy of detection of surface osseous changes in the temporomandibular joint using multidetector CT and cone beam CT

E H Zain-Alabdeen et al. Dentomaxillofac Radiol. 2012 Mar.

Erratum in

  • Dentomaxillofac Radiol. 2013;42(7):20139011

Abstract

Objective: The aim of this study was to assess the accuracy and reliability of cone beam CT (CBCT) images compared with multidetector CT (MDCT) images for the detection of surface osseous changes in temporomandibular joints (TMJs).

Methods: Naked-eye inspection of 110 sites in 10 TMJs from 5 dry human skulls provided the gold standard. Two radiologists interpreted the images. Sensitivity, specificity and kappa statistics were used for analysis.

Results: The sensitivities of both modalities were low and comparable whereas the specificities were high and comparable. Intraobserver reliabilities for CBCT (p=0.0005) and for MDCT (p=0.0001) showed significant agreement. Interobserver reliability was higher for CBCT than for MDCT.

Conclusion: CBCT and MDCT accuracy was comparable in detecting surface osseous changes with comparable intraobserver reliabilities. However, since CBCT requires less radiation exposure, it should be encouraged for imaging TMJ with suspected surface osseous changes.

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Figures

Figure 1
Figure 1
Skull immersed in water. (a) Placed in supine position in the multidetector CT. (b) Placed in upright position in the cone beam CT
Figure 2
Figure 2
Correctly detected surface osseous changes using both modalities. (1) Flattening in the anterosuperior slope of the condyle. (2) Flattening of the medial and lateral pole of the condyle. (3) Erosion. (4) Shallow fossa. (a) The gold standard; (b) multidetector CT; (c) cone beam CT
Figure 3
Figure 3
The intraobserver reliability and interobserver reliability for both multidetector CT (MDCT) and cone beam CT (CBCT) in interpreting surface osseous changes of temporomandibular joints
See this image and copyright information in PMC

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