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AGE ESTIMATION USING PANORAMIC RADIOGRAPHS OF DEVELOPING PERMANENT TEETH

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±è¼±¹Ì ( Kim Seon-Mi ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ¼Ò¾ÆÄ¡°úÇб³½Ç

Abstract

º» ¿¬±¸´Â È¥ÇÕÄ¡¿­±â ¾Æµ¿¿¡ À־ ¿¬·ÉÀ» ÃßÁ¤Çϴµ¥ Ä¡¾ÆÀÇ ¹ßÀ°À» ÀÌ¿ëÇϸ鼭 Ä¡¾Æ¹ßÀ°ÀÇ Æò°¡¿¡ °´°üÀûÀÎ ¼öÄ¡¸¦ ÀÌ¿ëÇÏ¿© ¹æÁ¤½ÄÀ» µµÃâÇÔÀ¸·Î½á °£´ÜÇÏ°Ô ¿¬·ÉÀ» ÃßÁ¤ÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ» ¿¬±¸ÇÏ°íÀÚ ÇÏ¿´´Ù. À̸¦ À§ÇØ 2002³â¿¡¼­ 2004³â±îÁö Àü³²´ëÇб³ º´¿ø¿¡ ³»¿øÇÑ È¯¾Æ Áß 7{sim}9¼¼ ¾î¸°ÀÌ 120¸íÀ» ´ë»óÀ¸·Î ¾ò¾îÁø Æijë¶ó¸¶ ¹æ»ç¼±»çÁøÀ» ÀÌ¿ëÇÏ¿© Mornstad¿¡ ÀÇÇØ Á¦½ÃµÈ ¹ßÀ°Ä¡¾ÆÀÇ Ä¡°ü ±æÀÌ, Ä¡±Ù ±æÀÌ, Ä¡±Ù´Ü°ø ³Êºñ¸¦ ÃøÁ¤ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ¿¬·É°ú »ó°ü¼ºÀÌ ³ôÀº °èÃøÄ¡·Î ³²¾Æ¿¡¼­´Â Á¦ 2´ë±¸Ä¡ Ä¡°ü ±æÀÌ, Á¦ 1´ë±¸Ä¡ Ä¡±Ù ±æÀÌ, Á¦ 1¼Ò±¸Ä¡ Ä¡±Ù´Ü°ø ³Êºñ°¡ ³ôÀº »ó°ü¼ºÀ» º¸ÀÎ ¹Ý¸é ¿©¾Æ¿¡¼­´Â Á¦ 2¼Ò±¸Ä¡ Ä¡°ü ±æÀÌ, Á¦ 2´ë±¸Ä¡ Ä¡±Ù ±æÀÌ, Á¦ 1´ë±¸Ä¡ Ä¡±Ù´Ü°ø ³Êºñ°¡ ³ôÀº »ó°ü¼ºÀ» º¸¿´´Ù.
2. »ó°ü¼ºÀÌ ³ôÀº °èÃøÄ¡¸¦ Áß´Ù¼±Çüȸ±ÍºÐ¼®À» »ç¿ëÇÏ¿© ¿ª·É°ú ¿¬°ü½ÃÄÑ ¿¬·ÉÃßÁ¤ ¹æÁ¤½ÄÀ» »êÃâÇÏ¿´´Ù. ³²¾Æ(°³¿ù) = 43.958 + ÇÏ¾Ç Á¦ 2´ë±¸Ä¡ Ä¡°ü ±æÀÌ {times} 4.392 + ÇÏ¾Ç Á¦ 1´ë±¸Ä¡ Ä¡±Ù ±æÀÌ {times} 2.225 - ÇÏ¾Ç Á¦ 1¼Ò±¸Ä¡ Ä¡±Ù´Ü°ø ³Êºñ {times} 2.046, ¿©¾Æ(°³¿ù) = 75.213 + ÇÏ¾Ç Á¦ 2¼Ò±¸Ä¡ Ä¡°ü ±æÀÌ {times} 3.910 + ÇÏ¾Ç Á¦ 2´ë±¸Ä¡ Ä¡±Ù ±æÀÌ {times} 2.280 - ÇÏ¾Ç Á¦ 1´ë±¸Ä¡ Ä¡±Ù´Ü°ø ³Êºñ {times} 6.217
À§ ½ÄÀ» Åä´ë·Î ÃøÁ¤¿¡ »ç¿ëµÇÁö ¾ÊÀº ³²³à °¢°¢ 10¸íÀÇ Æijë¶ó¸¶ ¹æ»ç¼±»çÁøÀ» ÀÌ¿ëÇÏ¿© ³ªÀ̸¦ ÃßÁ¤ÇÑ °á°ú ³²¾Æ¿¡¼­´Â -2.1{pm}6.8°³¿ùÀÇ ÆíÂ÷¸¦, ¿©¾Æ¿¡¼­´Â 6.1{pm}6.2°³¿ùÀÇ ÆíÂ÷¸¦ º¸¿´´Ù. ÀÌó·³ ¿¬·ÉÀ» ¸ð¸£´Â ¿ì¸®³ª¶óÀÇ È¥ÇÕÄ¡ ¿­±â ¾Æµ¿¿¡¼­ Æijë¶ó¸¶ ¹æ»ç¼± »çÁøÀ» ÀÌ¿ëÇÏ¿© ¿¬·É ÃßÁ¤½Ã À§ÀÇ ¹æÁ¤½ÄÀ» »ç¿ëÇÑ´Ù¸é ºñ±³Àû Á¤È®ÇÏ°Ô ¿¬·ÉÀ» ÃßÁ¤ÇÒ ¼ö ÀÖÀ¸¸®¶ó°í »ç·áµÈ´Ù.

The aim of this study was to test whether metric measurements of crown length, root length and apex width during tooth development could be a better basis for correlation with age than the classical methods based on subjective estimations of various stages of tooth development. Panoramic radiographs of 120 children, aged 7 to 9 years, were collected from the department of the pediatric dentistry of Chonnam National University Hospital, Korea. The methods of Mornstad was used to estimate age. The structures measured were crown length root length and apex width in panoramic radiographic.
The results were as follows :
1. In the boys, it showed higher correlation between lower 2nd molar crown length, lower 1st molar root length or lower 1st permolar apical width and age. In the girls, it showed higher correlation between lower 2nd premolar crown length, lower 2nd molar root length or lower 1st molar apical width and age.
2. With the aid of a multiple regression model, a linear relationship between some of these distances and age was shown. Boy(months) = 43.958 + lower 2nd molar crown length {times} 4.392 + lower 1st molar root length {times} 2.255 - lower 1st permolar apical width {times} 2.046, Girl(months) = 75.213 + lower 2nd premolar crown length {times} 3.910 lower 2nd molar root length {times} 2.280 - lower 1st molar apical width {times} 6.217
Age was estimated in boys and girls using the mathematic model ; the mean difference between chronological and estimated ages was -2.1{pm}6.8 months for boys and 6.1{pm}6.2 months for girls. Therefore, it seems to be more accurate and easier than the earlier methods.

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Age estimation;Panoramic radiographs

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