Abstract： Objective To explore the clinical value of 64-slice CT for dental panoramic imaging technology in orthodontic treatment of maxillary and mandibular embedded teeth.Methods Fifty patients with maxillary and mandibular embedded teeth underwent 64-slice spiral CT examination.By using Dentascan software,multi-planar reconstruction(MPR),curved planar reconstruction(CPR),maximum intensity projection(MIP),volume rendering(VR) and shaded surface display(SSD) reconstruction,tooth section was observed from different angles and 3-D images were obtained to determine the shape of embedded teeth,labial side and palatine side location,the position of reconstruction window,eruption direction,incision direction,and their relationship with adjacent teeth.Results Among the 65 maxillary and mandibular embedded teeth of 50 patients,38 impacted teeth were found in 38 patients and 27 embedded supernumerary teeth in 12 patients.Three-dimensional reconstruction of spiral CT images could accurately show the number of maxillary and mandibular embedded teeth,the shape of crowns and roots,labial side and palatine side location,eruption direction,and their anatomical relationship with adjacent teeth.Conclusion Multislice spiral CT for dental panoramic imaging technology is of great significance in diagnosis of embedded teeth and can be clinically used as an effective examination for surgical treatment and orthodontic therapy of embedded teeth.
2011, Vol. 53 
