Reflecting the tissue situation from a three-dimensional perspective, we can find more subtle lesions that cannot be found from the angle of oral X-ray projection. Its three-dimensional reconstruction effect can accurately evaluate the situation of bone tissue and mandibular joint, and assist doctors in preoperative scheme design and postoperative scientific evaluation (such as chin correction surgery).
2. The dental tablet machine can only provide two-dimensional images of about three teeth.
3. The panoramic machine provides two-dimensional images of all teeth.
4. Oral CT is also called cone-beam CT or CBCT, and panoramic film is also called curved section. It's all x-rays
5. Oral CT is a three-dimensional CT, which can clearly see the jaw, teeth, maxillary sinus and inferior alveolar nerve canal, including condyle and joints, from coronal, sagittal and normal horizontal positions, and is far superior to curved films and dental films in observing the shape of tooth root tip and the relationship between maxillary sinus and inferior alveolar nerve canal.
6. Curved section is a plane X-ray image, from which we can see the shape of every tooth and condyle in the whole oral cavity, as well as the position of maxillary sinus and inferior alveolar neural tube.
7. Compared with CBCT, two-dimensional can't see the relationship between apical and maxillary sinus and inferior alveolar nerve canal from three-dimensional all-round angle, so it still has some defects, but the radiation of curved tomography is relatively small and its application range is relatively wide.
Extended data:
The significance of oral CT in the location diagnosis of embedded teeth and supernumerary teeth: it can accurately display the number, size and shape of embedded supernumerary teeth in bone; The spatial position (labial buccal side, lingual side, height and inclination) of embedding supernumerary teeth can be determined;
It can be determined whether the position of embedded supernumerary teeth is impacted by soft tissue or jaw. It can accurately display the distance or embedding relationship between embedded supernumerary teeth and adjacent tooth germs and roots. It can show whether the adjacent roots are absorbed and to what extent.
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