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Comparative Study Of The Macroscopic Finding, Conventional Topographic Imaging, And Confuted Homographic Imaging In Locating The Mandibular Canal

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Abstract

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3. ¿µ»óÀ籸¼º¹ýÀ» ÀÌ¿ëÇÑ Àü»êÈ­´ÜÃþ»çÁøÀÌ ÀϹݴÜÃþ»çÁø¿¡ ºñÇÏ¿© ¸ðµç ºÎÀ§¿¡¼­ Ç¥ÁØ
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5. ÃÑ 120¿¹ Áß ÇϾǰüÀ» °üÂûÇÒ ¼ö ¾ø´Ù°í ÇÑ °æ¿ì°¡ ¿µ»óÀ籸¼º ¹ýÀ» ÀÌ ¿ëÇÑ Àü»êÈ­´Ü
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#ÃÊ·Ï#
The purpose of this study was comparison of conventional tomography with
reformatted computed tomography for dental implant in locating the mandibular canal.
Five dogs were used and after conventional tomographs and reformatted computed
tomographs were taken, four dentist traced all films. Mandibles were sectioned with
2mm slice thickness and the sections were then radiographed(contact radiography). Each
radiographic image was traced and linear measurements were made from mandibular
canal to alveolar crest, buccal cortex, lingual cortex, and inferior border
Following results were acquired :
1. Reformatted computed tomographs were exacter than conventional tomography by
alveolar crest to canal length of -0.6§® difference between real values and radiographs.
2. The average measurements of buccal cortex to mandibular canal width and lingual
cortex to mandibular canal width of conventional tomographs were exacter than
reformatted computed tomographs, but standard deviations were tougher than
reformatted computed tomographs.
3. Standard deviations of reformatted computed tomographs were lower than
conventional tomographs at all comparing sites
4. At reformatted computed homography 62.5% of the measurements performed were
within ¡¾1mm of the true value, and at conventional tomography 24.1% were.
5. Mandibular canal invisibity was 0.8% at reformatted computed tomography and
9.2% at conventional tomography.
Reformatted computed tomography has been shown to be more useful radiographic
technique for assessment of the mandibular canal than conventional tomography.

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