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Pre-operative radiographic evaluation of lower third molars with computed tomography

A Öhman*,1, K Kivijärvi2, U Blombäck2 and L Flygare1

1 Department of Radiology, Sunderby Hospital, SE-971 80, Luleå, Sweden; 2 Department of Maxillofacial Surgery, Sunderby Hospital, SE-971 80 Luleå, Sweden


Figure 1
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  		Figure 1 Conventional radiographic examination. (a) Panoramic (b) posterior–anterior (c) stereographic (scanograms)

 

Figure 2
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  		Figure 2 Example of a standard CT examination. (a) Examination performed in the axial plane parallel to the occlusal plane. (b) Axial. (c) Reformatted coronal image. The axial and coronal images show the inferior root penetrating the lingual cortex

 

Figure 3
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  		Figure 3 The relationship between a dark band across the roots and grooving of the roots. (a) Panoramic view (cropped) depicting a distinct dark band across the roots. (b) Direct coronal CT image depicting grooving of the root by the mandibular canal (arrow) on the lingual side. (c) Communication with the oral cavity is present (arrow)

 

Figure 4
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  		Figure 4 (a) Direct coronal image depicting an inter-radicular course and grooving of the roots by the mandibular canal (arrow). (b) Another patient where the distal root of 48 hooks around the mandibular canal (arrow)

 




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