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THE RADIOGRAPHICAL MEASUREMENT OF ROOT CANAL CURVATURE OF MANDIBULAR PRIMARY 2ND MOLARS

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Abstract

À¯Ä¡±ÙÀÇ Ä¡±ÙÀÌ°³¿Í ¸¸°î¿¡ °ü·ÃµÈ ÇüÅÂÇÐÀû Ư¼ºÀº Ä¡¿­±³È¯±âÀÇ Ä¡±Ù Èí¼ö ¹× ±Ù´Ü º´¼ÒÀÇ ¾ç»óÀ» °áÁ¤ÁöÀ» »Ó ¾Æ´Ï¶ó, ¼º°øÀûÀÎ Ä¡¼öÄ¡·á¿¡ ½É´ëÇÑ ¿µÇâÀ» ¹ÌÄ£´Ù. º» ¿¬±¸´Â ÇÏ¾Ç °è 2 À¯±¸Ä¡ ±Ù°ü ¸¸°îÀÇ °¢µµ, ¹Ý°æ ¹× ¸¸°î ½ÃÀÛÁ¡À» ÃøÁ¤ÇØ º½À¸·Î½á, À¯Ä¡±Ù°ú ±Ù°üÀÇ ÇغÎÇÐô ÇüŸ¦ Á¤¹Ð ºÐ¼®ÇÒ ¸ñÀûÀ¸·Î ½ÃÇàµÇ¾ú´Ù.
¿¬±¸Àç·á·Î´Â 3~6¼¼ÀÇ ¾î¸°ÀÌÀÇ °è 2 À¯±¸Ä¡ ±¸³» Ä¡±Ù´Ü ¹æ»ç¼± »çÁø 50¸Å¸¦ »ç¿ëÇÏ¿´´Ù. ±Ù´Ü°øÀÌ ¹Ì¿Ï¼ºÀ̰ųª Èí¼öµÈ °ÍÀ» Á¦¿ÜÇÏ°í, ¹æ»ç¼±»óÀÇ ¿Ö°îÀÌ ÀûÀ¸¸ç ±Ù°ü Ç÷ÅÂÀÇ Æǵ¶ÀÌ °¡´ÉÇÑ °ÍÀ» ¼±ÅÃÇÏ°í, ÀڷḦ digital imageÈ­ÇÏ¿© À̹ÌÁö ºÐ¼®¿ë software Scion Image Beta 4.02(Scion Co. USA)¸¦ ÀÌ¿ëÇÏ¿© ¸¸°îÀ» ºÐ¼®ÇÏ¿´´Ù. ±×¸®°í Schneider¹ý¿¡ ÀÇÇØ ¸¸°îµµ¸¦ ÃøÁ¤ÇÏ°í, SchaeferemdÀÇ ¹æ¹ý¿¡ ÀÇÇØ ¸¸°î¹Ý°æÀ» ÃøÁ¤ÇÏ¿´À¸¸ç, ¾Æ¿ï·¯ ¸¸°î°³½Ã°Å¸®¸¦ ÃøÁ¤ÇÏ°í ±Ù¿ø½É±Ù °£ÀÇ ºñ±³¸¦ ÅëÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. Á¦ 2 À¯±¸Ä¡ÀÇ ¸¸°îµµ´Â ±Ù½É±Ù¿¡¼­ 17.3¢ª¡¾5.0, ¿ø½É±Ù¿¡¼­ 27.9¢ª¡¾6.0·Î ¿ø½É±Ù¿¡¼­ Å©°Ô ³ªÅ¸³µ´Ù(p<0.05).
2. ¸¸°î¹Ý°æÀº ±Ù½É±Ù¿¡¼­ 8.7mm¡¾2.5, ¿ø½É±Ù¿¡¼­ 5.8mm¡¾1.5·Î ±Ù½É±Ù¿¡¼­ Å©°Ô ³ªÅ¸³µ´Ù(p<0.05).
3. ¸¸°î°³½Ã°Å¸®´Â ±Ù½É±Ù¿¡¼­ 4.1mm¡¾0.6, ¿ø½É±Ù¿¡¼­ 4.2mm¡¾0.6·Î ¾ç ±Ù°£¿¡ Â÷ÀÌ°¡ ¾ø¾ú´Ù(<(0.05).
Morphology of primary root divergency and curvature determines the pattern of root resorption and periapical lesion, and affects successful root canal treatment.
With the purpose of analysing the morphology of primary mandibular second molar roots and canals, the fre¡þquency, angle, radius, and start of curvature of the canal were measured.
Fifty clinical radiographs were taken from 3-6 years old children, followed by digitizing after scanning and analyzing by Scion image Beta 4.02TM(Scion Co. USA). The angle of curvature was determined by Schneider¢¥ s method and the radius of curvature was determined by Schaefer s method.
The results were as follows
1. The angle of curvatures were 17.3¡Æ ¡¾5.0 (mesial), and 27.9¢¥-+6.0 (distal). Distal curvature was significant¡þly larger than mesial.(p(O.05)
2. The radius of curvatures were 8.7mm¡¾2.5 (mesial), and 5.8 mm¡¾1.5 (distal). Mesial curvature was sig¡þnificantly larger than distal.(p(0.05)
3. The start of curvatures were 4.lmm¡¾0.6 (mesial), and 4.2mm¡¾0.6 (distal). There were no difference be¡þtween two groups.(p(0.05)

Å°¿öµå

ÇÏ¾Ç Á¦2À¯±¸Ä¡;Ä¡±Ù¸¸°î;Mandibular primary 2nd molar;Root curvature

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