Normal Representations of Permanent Teeth and Alveolar Bone at Multi-slice Spiral CT / 实用放射学杂志

ABSTRACT

Objective To explore the spiral the normal representations of permanent teeth and alveolar bone of multi-slice spiral(MSCT). Methods 30 adults with normal teeth were studied by multislice spiral CT scanner,window width and window level was 3000~5000 HU and 1200~1500 HU respectively.MSCT findings were analysed using multiplanar reformation,dental panorama and 3D reconstruction were done in all cases.Results The tooth were showed as multilaryer structures with different density at MSCT because of the mineral content of different part of tooth,from high to low density was enamel,circumpulpal dentin,outside dentin,cementum and pulp.The periodontal membrane was low density located beween the cementum and lamina dura and the thickness was homogeneous.The bone cortex of alveolar bone was successive,the bone trabecula appeared as wirelike or reticulate.Conclusion The structures of permanent teeth and alveolar bone can be displayed clearly by MSCT.Multiplanar reformation,dental panorama and 3D reconstruction are helpful to display the structures of teeth and alveolar bone as well as the relationship around structures.