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A RADIOGRAPHIC STUDY OF LOCALIZATION OF THE INFERIOR ALVEOLAR CANALS IN RELATION TO THE APICES OF THE MANDIBULAR THIRD MOLARS

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Abstract

ÀúÀÚ´Â ÇϾÇÁ¦ 2´ë±¸Ä¡°¡ Á¤»óÀ§·Î ¸ÍÃâµÇ¾î ÀÖ°í Á¦ 3´ë±¸Ä¡ÀÇ Ä¡°üÁÖÀ§¿°À̳ª Ä¡±Ù´Üº´
¼Ò°¡ ¾øÀ¸¸ç Ä¡±ÙÀÌ ¿Ï¼ºµÈ ÇϾÇÁ¦ 3´ë±¸Ä¡¸¦ º¸À¯ÇÑ 20¼¼¿¡¼­ 30¼¼»çÀÌÀÇ °Ç°­ÇÑ ³²¡¤³à
95¸í(³²ÀÚ 57¸í, ¿©ÀÚ 38¸í, Æò±Õ¿¬·É 25.6¼¼)¿¡¼­ °üÂûµÈ ÇϾÇÁ¦ 3´ë±¸Ä¡ 103°³¸¦ ¿¬±¸´ë»ó
À¸·Î äÅÃÇÏ¿© Ä¡±Ù´ÜX¼±»çÁø¿¡¼­ À̵éÀÇ ¸ÍÃâ»óÅÂ, ¸Åº¹±íÀÌ ¹× ÇϾÇÁ¦ 3´ë±¸Ä¡ Ä¡±Ù´Ü°ú
ÇÏÄ¡Á¶°üÀÇ À§Ä¡¸¦ Á¶»çÇÏ¿© ´ÙÀ½ÀÇ °á°ú¸¦ ¾ò¾ú´Ù.
1. ÇϾÇÁ¦ 3´ë±¸Ä¡ÀÇ Ä¡±Ù´Ü¿¡ ´ëÇÑ ÇÏÄ¡Á¶°üÀÇ À§Ä¡´Â 103°³ÀÇ Ä¡¾Æ Áß¿¡¼­ ÇùÃøÀ§Ä¡°¡
80°³(77.7%)·Î °¡Àå ¸¹¾Ò°í, Ä¡±Ù´Ü Á÷ÇϺΰ¡ 17°³(16.5%), ¼³ÃøÀ§Ä¡°¡ 6°³(5.8%)À̾ú´Ù.
2. ÇϾÇÁ¦ 3´ë±¸Ä¡ÀÇ ¸ÍÃâ»óÅ´ 103°³ÀÇ Ä¡¾Æ Áß¿¡¼­ Class ¥°ÀÌ 38°³(36.9%)·Î½á °¡Àå
¸¹¾ÒÀ¸¸ç, Class ¥± 22°³(21.3%), Class ¥µ 18°³(17.5%), Class ¥²°¡ 15°³(14.7%), Class ¥³
°¡ 5°³(4.8%), Class ¥¶ÀÌ 3°³(29%), Class ¥´°¡ 2°³(1.9%)ÀÇ ¼øÀ̾ú°í, ¸ÍÃâ»óÅ¿¡ µû¸¥ ÇÏ
¾ÇÁ¦ 3´ë±¸Ä¡ÀÇ Ä¡±Ù´Ü°ú ÇÏÄ¡Á¶°üÀÇ À§Ä¡´Â Class ¥°¿¡¼­ 35°³(92.1%), Class ¥±¿¡¼­ 19°³
(86.4%), Class ¥²¿¡¼­ 12°³(80.0%), Class ¥³¿¡¼­ 5°³(100.0%), Class ¥´¿¡¼­ 2°³(100.0%)°¡
ÇùÃø¿¡ À§Ä¡ÇÏ¿´´Ù. ±×·¯³ª Class ¥µ¿¡¼­´Â ÇùÃøÀÌ 6°³(33.3%), Ä¡±Ù´Ü Á÷ÇϺΰ¡ 8°³
(44.5%), ¼³ÃøÀÌ 4°³ (22.2%)À̾ú´Ù.
3. ÇϾÇÁ¦ 3´ë±¸Ä¡ÀÇ ¸Åº¹ ±íÀÌ´Â ÃÑ 103°³ Ä¡¾Æ Áß Degree ¥°ÀÌ 55°³ (53.4%), Degree
¥±°¡ 38°³(36.9%), Degree ¥²°¡ 10°³(9.7%) À̾úÀ¸¸ç, ¸Åº¹±íÀÌ¿¡ µû¸¥ ÇϾÇÁ¦ 3´ë±¸Ä¡ÀÇ
Ä¡±Ù´Ü¿¡ ´ëÇÑ ÇÏÄ¡Á¶°üÀÇ À§Ä¡´Â Degree ¥°¿¡¼­´Â ÇùÃø¿¡ À§Ä¡ÇÑ °æ¿ì°¡ 54°³(98.2%)·Î
´ëºÎºÐÀ̾ú°í, Degree ¥±¿¡¼­´Â ÇùÃøÀÌ 23°³(60.5%), Ä¡±Ù´Ü Á÷ÇϺΰ¡ 12°³(31.6%), ¼³ÃøÀÌ
3°³(7.9%), ±×¸®°í Degree ¥²¿¡¼­´Â ÇùÃøÀÌ 3°³(30.0%), Ä¡±Ù´Ü Á÷ÇϺΰ¡ 4°³(40.0%), ¼³Ãø
ÀÌ 3°³(30.0%)À̾ú´Ù.
#ÃÊ·Ï#
The purpose of this study was to localize the inferior alveolar canals in relation to the
root apices of the mandibular third molars, according to their positions and degrees of
impaction using vertical tube shift technique.
One hundred three mandibular third molars, from 95 persons consisted of 57 males
and 38 females, were clinically and radiographically investigated. The mandibular third
molars had no pericoronitis and periapical lesions, and showed an evidence of complete
root formation.
The obtained results were as follows:
1. In localiztion of the inferior alveolar canals in relation to the root apices of the
mandibular third molars, the inferior alveolar canal was located at the buccal side of the
root apices of mandibular third molar in 77.7%, below the root apices in 16.5%, and the
lingual side of root apices in 5.8%.
2. The positions of the mandibular third molars according to the Winter's
Classification were as follows; 36.9% in Class ¥°, 21.3% in Class ¥±, 14.7% in Class ¥²,
4.8% in Class ¥³, 1.9% in Class ¥´, 17.5% in Class ¥µ, 2.9% in Class ¥¶. In localization
of the inferior alveolar canals in relation to the root apices of the mandibular third
molars according to the Winter's Classification, 92.1% of Class 1, 86.4% of Class ¥±,
80.095 of Class ¥², and 100.095 of Class ¥³ and ¥´ were located at the buccal side.
In Class ¥µ, however, 33.3% was located at the buccal side, 44.5% below the root
apices, and 22.2% at the lingual side.
3. The degree of impaction was revealed to be 53.4% in Degree ¥°, 36.9% in Degree
¥±, and 9.7% in Degree ¥².
In localization of the inferior alveolar canals in relation to the root apices of
mandibular third molars according to degree of impaction, 98.2% of Degree I was located
at the buccal side. In Degree ¥±, 60.5% was located at the bucal side, 31.6% below the
root apices, and 7.9% at the lingual side. In Degree ¥², 30.0% was located at the buccal
side, 40.0% below the root apices, and 30.0% at the lingual side.

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