Program including abstracts as pdf available here

P 105
Title
OSSEOuS AbNORMALITIES OF THE TMJ; COMPARISON OF THE RELIAbILITy OF OPG
Authors
T. AMEMIyA 1 , K. MATSuMOTO 2,3 , y. KAI 1,2 , H. yAMADA 1 , K. SAWADA 2,3 , K. EJIMA 2,3 ,
S. KAWASHIMA 2,3 , K. HONDA 2,3
Affiliations
1 Nihon University Graduate School of Dentistry, Tokyo, JAPAN, 2 Department of Oral and
Maxillofacial Radiology, Nihon University School of Dentistry, Tokyo, JAPAN, 3 Division of Advanced
Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo,
JAPAN
Body
Objectives: Orthopantomography (OPG) and panoramic projection for temporomandibular
joint (Panoramic TMJ) are alternative methods of conventional radiography (e.g. transcranial
projection) for diagnosing TMJ disorders. There have been few reports describing the diagnostic
reliability of these methods comparing with cone-beam computed tomography (CBCT).
The purpose of this study is to evaluate the diagnostic accuracy of OPG and panoramic TMJ in
detecting osseous abnormalities.
Methods: Fifty TMJs in 29 patients, who were examined using OPG, Panoramic TMJ and CBCT,
were included in this study. Two observers evaluated presence of bone absent change in the
condyles and fossae on OPG, Panoramic TMJ and CBCT. Comparing with CBCT findings as gold
standard, sensitivity, specificity, and accuracy of OPG and Panoramic TMJ were calculated.
Results: Sensitivity, specificity and accuracy were 0.45, 0.86 and 0.62 for the condyle, 0.46,
1.0 and 0.86 for the fossa on OPG, and 0.63, 0.90 and 0.74 for the condyle, 0.69, 0.92 and
0.86 for the fossa on Panoramic TMJ, respectively.
Conclusion: These results and previous reports on other TMJ imaging modalities suggested that
OPG and panoramic TMJ are useful methods of screening for bone change due to TMJ disorders.
Keywords
Panoramic TMJ,CBCT,mandibular fossa
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