Fig. 9

Pan-sinusitis on both paranasal sinuses originating from the root infection of the right first molar. Preoperative panoramic view (a), Water’s view (b), axial CT scan view showing sinusitis of both maxillary sinuses (c), coronal CT scan view showing whole sinusitis including both ethmoidal and frontal sinuses (d), and sagittal CT scan view showing involvement of the root pathologic lesion of the right first molar (e)