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A Computerized Tomographic Study on the Location of the Mandibular Canal and the Cortical Thickness of the Mandible

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Abstract

ÇÏ¾Ç Á¦1,2¼Ò±¸Ä¡ ¹× Á¦1,2´ë±¸Ä¡°¡ Á¸ÀçÇÏ°í °ñ¿¡ º´º¯ÀÌ °üÂûµÇÁö ¾ÊÀº ¼ºÀÎ °ÇÁ¶ÇϾǰñ
20°³, ÃÑ 40°³ÀÇ ÇϾǰñÀ» ´ë»óÀ¸·Î Àü»êÈ­´ÜÃþ»çÁø»óÀ» ¾ò¾ú´Ù. ÇϾǰñÀÇ ¼öÆò ÇϾǰü¸é»ó
¿¡¼­´Â ¼öÆòÆø°æ, Çù¼³Ãø Ãֿܹæ ÇÇÁú°ñ¿¡¼­ºÎÅÍ ÇϾǰü±îÁöÀÇ °Å¸® ¹× Çù¼³Ãø ÇÇÁú°ñÀÇ µÎ
²²,¼öÁ÷ÇϾǰü¸é»ó¿¡¼­´Â ÇϾǰñÀÇ ¼öÁ÷°í°æ, Ä¡Á¶Á¤ ¹× ÇϾǰñ ÃÖÇÏ¹æ °æ°è¿¡¼­ºÎÅÍ ÇϾǰü
±îÁöÀÇ °Å¸®¸¦ °èÃøÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ÇϾǰñ ÇùÃø¸é¿¡¼­ ÇϾǰü±îÁöÀÇ °Å¸®´Â Á¦ 1´ë±¸Ä¡ ±Ù½ÉÄ¡±Ù ´Ü¸é»ó
(S0)¿¡¼­ 6.6¡¾0.9§®(48.9¡¾2.2%)À̾ú°í, ÇϾǰñ ¼³Ãø¸é¿¡¼­ ÇϾǰü±îÁöÀÇ °Å¸®
´Â S0´Ü¸é»ó¿¡¼­ 4.1¡¾1.1§®(29.8¡¾2.3%)À̾úÀ¸¸ç, ÇϾǰüÀº ÈĹæÀ¸·Î °¥¼ö·Ï
ÇùÃø°Å¸®´Â Áõ°¡µÇ°í ¼³Ãø°Å¸®´Â °¨¼ÒµÇ¾ú´Ù.
2. Ä¡Á¶Á¤¿¡¼­ ÇϾǰü±îÁöÀÇ ¼öÁ÷°Å¸®´Â S0´Ü¸é»ó¿¡¼­ 16.9¡¾1.6§®(60.0¡¾
2.1%)À̾ú°í, ÇϾÇÇÏ¿¬¿¡¼­ ÇϾǰü±îÁöÀÇ ¼öÁ÷°Å¸®´Â S0´Ü¸é»ó¿¡¼­ 8.8¡¾1.3§®
(28.8¡¾2.1%)À̾ú´Ù. ÈĹæÀ¸·Î ÀÌÇàµÉ¼ö·Ï Ä¡Á¶Á¤¿¡¼­ ÇϾǰü±îÁöÀÇ °Å¸®´Â °¨¼ÒµÇ¾úÀ¸³ª ÇÏ
¾ÇÇÏ¿¬¿¡¼­ ÇϾǰü±îÁöÀÇ °Å¸®´Â S0´Ü¸é»ó¿¡¼­ °¡Àå ª¾Ò°í ÀüÈĹæÀ¸·Î ÀÌÇà
µÉ¼ö·Ï Áõ°¡µÇ¾ú´Ù.
3. ÇϾǰñ ÇùÃø ÇÇÁú°ñÀÇ µÎ²²´Â S0´Ü¸é»ó¿¡¼­ 2.2¡¾0.4§®(15.8¡¾2.2%)À̾ú
°í, ¼³Ãø ÇÇÁú°ñÀÇ µÎ²²´Â S0´Ü¸é»ó¿¡¼­ 2.0¡¾0.6§®(13.1¡¾2.1%)À̾ú´Ù. ÈĹæÀ¸
·Î °¥¼ö·Ï ÇùÃø ÇÇÁú°ñÀÇ µÎ²²´Â Áõ°¡µÇ´Â ¹Ý¸é ¼³Ãø ÇÇÁú°ñÀÇ µÎ²²´Â °¨¼ÒµÇ¾ú´Ù.
4. ÇùÃø ÇÇÁú°ñÀÇ ¸éÀûÀº S0´Ü¸é»ó¿¡¼­ 66.5¡¾1.0§±À̾ú°í, ¼³Ãø ÇÇÁú°ñÀÇ
¸éÀûÀº S0´Ü¸é»ó¿¡¼­ 65.8¡¾0.9§±À̾úÀ¸¸ç, ÈĹæÀ¸·Î °¥¼ö·Ï ÇùÃø ÇÇÁú°ñÀÇ ¸é
ÀûÀº Áõ°¡µÇ´Â ¹Ý¸é ¼³Ãø ÇÇÁú°ñÀÇ ¸éÀûÀº °¨¼ÒµÇ¾ú´Ù.
#ÃÊ·Ï#
The location of the mandibular canal and the cortical thickness of the mandible is
important in the practice of dentistry. This study was performed on twenty chosen dry
mandibles, which were of adults and included fully erupted premolars and molars.
The purpose of this study was to evaluate the location of the mandibular canal and the
cortical thickness of the mandible on computed tomograms and to aid in the surgical
treatment plans.
The obtained results were as follows;
1. The horizontal distance between the mandibular canal and the buccal external border
was 6.6¡¾0.9§® on So(mesial root of the first molar), and it was increased posteriorly.
The horizontal distance between the mandibular canal and the lingual external border
was 4.1¡¾1.1§® on S0, and it was decreased posteriorly.
2. The vertical distance between the alveolar crest and the mandibular canal was 16.9
¡¾ 1.6mm on S0, and it was decreased posteriorly. The vertical distance
between the inferior border of mandible and the mandibular canal was 8.8¡¾1.3§® on
S0, and it was increased anteriorly and posteriorly.
3. The thickness of the buccal cortical plate was 2.2¡¾ 0.4§® on S0 and it
was increased posteriorly. But, that of the lingual cortical plate was 2.0¡¾0.6§® on
S0 and it was decreased posteriorly.
4. The area of the buccal cortical plate was 66.5¡¾ 1.0§± on S0, and it
was increased posteriorly. But, that of the lingual cortical plate was 65.8¡¾ 0.9§± on
S0 and it was decreased posteriorly.

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