CT multiplanar image anatomic study on orbital bone used for implant operation / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the orbital bone quantity by spiral computer tomography (CT) for orbital implant operation.</p><p><b>METHODS</b>Fifty-two normal skull specimens with marks received spiral CT scan and their multiplanar images were obtained. The quantity (length x width) were measured on multiplanar images.</p><p><b>RESULTS</b>The right orbital bone quantity at 7:00 was the highest, average 11.91 mm x 8.38 mm, and at 3:00 was the lowest, average 2.31 mm x 1.34 mm. The left orbital bone quantity at 5:00 was the highest, average 12.03 mm x 8.56 mm, and at 9:00 was the lowest, average 2.44 mm x 1.29 mm. There had no significance correlation with gender at the same position in both sides.</p><p><b>CONCLUSION</b>Useful data had been obtained for the selection of the placement sites, direction, length, and diameter of orbital implants.</p>

Clinical application of computer assisted technology based spiral CT scan for locating impacted tooth / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate clinical value of computer assisted technology for locating the impacted tooth.</p><p><b>METHODS</b>Thirty-five patients with impacted tooth were received spiral CT scan. The DICOM data were processed by Simplant software for locating the impacted tooth.</p><p><b>RESULTS</b>The reconstruction images clearly showed detail of the impacted teeth, including 3D surface image, eruption orientation, buccal and lingual location, medial and distal location and relationship with dentition and circumambient anatomic structure.</p><p><b>CONCLUSION</b>The computer assisted technology can localize the impacted tooth precisely and provide valuable information for clinical treatment.</p>