Morphological features of five-rooted maxillary second molar evaluated by spiral CT

Spiral CT imaging of the extracted tooth was performed on a 128-slice dual-source CT scanner (SOMATOM Definition; Siemens, Erlangen, Germany). Since it is an ex vivo study, CT scan parameters were as follows: detector collimation, 16x0.3 mm; gantry rotation time,1 s; tube voltage, 120 kV; effective mAs, 180 mAs; pitch, 0.6; image reconstruction, 0.4 mm effective slice width at 0.4 increment; 512x512 pixel matrix; convolution kernel, very sharp U75u.