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RADIOLOGRAPHIC STUDY OF MANDIBULAR THIRD MOLARS

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Abstract

îÊíº´Â 1985Ò´¿¡ ¼­¿ïÓÞùÊÎèÜ»ê¹ öÍΡۯÞÒÒÑΡ¿¡ Ò­êÂÇÑ ü´íºñé ÌÀáßöÍ éçí¥öÍ Ðìöâ ×äßÈ
ÀÌ ¾ø´Â ´Ù½Ã ¸»Çؼ­ ð¯ß²ÓÞÏ¿ö͸¦ κóÌÇÒ¼ö ÀÖ´Â Orthopantomogramñé¿¡¼­ 15ᨷκÎÅÍ 30
ᨱîÁöÀÇ Ñûåü ÊÀ 283çÓ 223çÓ õÅ 506ØÝÀÇ filmÀ» ÓßßÚÀ¸·Î ÇÏ¿© Winter ¹× ÐìöâÀÇ ÝÂ×¾Ûö
À» ××éÄÇÏ¿© ´ÙÀ½°ú °°Àº Ì¿Íý¸¦ ¾ò¾ú´Ù.
1. ß¾ù»äÉñ§éÓö°ÀÇ ð¯ß²ÓÞÏ¿öÍÀÇ ØðõóμÌõ´Â 229çÓ·Î ð¯ì鸹°í ÀÌ 61çÓÀÌ°í ÌÀåý°¡ 45ö°
À̾ú´Ù.
2. ù»äÉÍé ß¾ú¼ò«¿Í ð¯ì£ÓÞÏ¿öÍ êÀãýÝ»ÊàÀÇ Î¼Ìõ¸¦ ÐññÞÀ¸·Î ÇÑ ÝÂ×¾¿¡¼­´Â class ¥±°¡
460çÓ (61.8%)ÀÌ°í class ¥²°¡ 182çÓ·Î 24.5%¿´´Ù.
3. ð¯ß²ÓÞÏ¿öÍ íþõî°ú ð¯ì£ÓÞÏ¿öÍ íþõîÀ» ÐññÞÀ¸·Î ÇÑ ÝÂ×¾¿¡¼­ ÚëàïÌËÞØ¿¡¼­´Â á÷òÁêÈ°¡
302çÓ 40.6% ÐÎãýÌËÞØêÈ°¡ 280çÓ 37.6% ÀÌ¿´´Ù.
4. ÐÎãýÌËÞØ´Â ±× ÞºÓø°¡ °¡Àå ¸¹¾ÒÀ¸¸ç ±× øÁгö·´Â 138.62¡¾12.56¡Æ ÀÌ¿´´Ù.
#ÃÊ·Ï#
The author performed radiographical analysis of the third molar dentition and
characteristic relation to anatomical oral structure. For this purpose 506
orthopantomagraph film, male 283 cases and female 223 cases, aged from 15 to 30 years
were evaluated by means of Winter's classification in conjunction with some other
methods.
Through the study following results were obtained;
1. The eruption of were found in 229 cases followed by 61 cases of and 45 cases
showed no evidence of eruption.
2. The classification based on the relation of ramus to distal portion of the 2nd molar
revealed class ¥±,460 cases (61.8%) and 182 cases (24.5%) were class ¥².
3. Parallelism between long axis of mandibular third molar and the second molar were
found in 302 cases (40.8%) and mesial inclination of the third molar were 280 cases
(37.6%).
4. Average inclination degree among these cases showed 138.62¡¾12.56¡Æ

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