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Comparison of arch forms between Korean and Japanese in Class I, II, and III malocclusion

Korean Journal of Orthodontics 2007³â 37±Ç 5È£ p.364 ~ 375
ÀÌäÇü, ¸ð¼º¼­, °­À±±¸, Nojima Kunihiko, ±è¿µÈ£, ±¹À±¾Æ,
¼Ò¼Ó »ó¼¼Á¤º¸
ÀÌäÇü ( Lee Chae-Hyung ) - °¡Å縯´ëÇб³ ÀÓ»óÄ¡°úÇдëÇпø
¸ð¼º¼­ ( Mo Sung-Seo ) - °¡Å縯´ëÇб³ ÀÓ»óÄ¡°úÇдëÇпø
°­À±±¸ ( Kang Yoon-Goo ) - °¡Å縯´ëÇб³ ÀÓ»óÄ¡°úÇдëÇпø
 ( Nojima Kunihiko ) - µ¿°æÄ¡°ú´ëÇÐ ±³Á¤°ú
±è¿µÈ£ ( Kim Young-Ho ) - ¼º±Õ°ü´ëÇб³ ÀÇ°ú´ëÇÐ »ï¼º¼­¿ïº´¿ø Ä¡°úÁø·áºÎ ±³Á¤°ú
±¹À±¾Æ ( Kook Yoon-Ah ) - °¡Å縯´ëÇб³ ÀÓ»óÄ¡°úÇдëÇпø ±³Á¤Çаú

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº Çѱ¹Àΰú ÀϺ»ÀÎÀÇ Angle¾¾ I±Þ, II±Þ, III±Þ ºÎÁ¤±³ÇÕ±º¿¡¼­ ÇϾÇÄ¡¿­±ÃÀÇ Å©±â¿Í ÇüÅÂÀû Ư¼ºÀ» »óÈ£ ºñ±³ ºÐ¼®Çϴµ¥ ÀÖ¾ú´Ù. Çѱ¹ÀÎÀÇ ºÎÁ¤±³ÇÕÀÚ 368¸í(I±Þ 114¸í, II±Þ 119¸í, III±Þ 135¸í)°ú ÀϺ»ÀÎÀÇ ºÎÁ¤±³ÇÕÀÚ 160¸í(I±Þ 60¸í, II±Þ 50¸í, III±Þ 50¸í)À» ´ë»óÀ¸·Î ÇÏ¿´´Ù. Ä¡·á Àü ÇÏ¾Ç Ä¡¿­ ¸ðÇüÀ» º¹»çÇÑ »çÁø¿¡¼­ 13°³ÀÇ ÀÎÁ¢ÇÑ Á¢Ã˸鿡¼­ °¡Àå ÇùÃø¿¡ À§Ä¡ÇÑ Á¡µéÀ» ÁÂǥġȭÇÑ ÈÄ ÇÏ¾Ç Ä¡¾ÆÀÇ µÎ²² ÀÚ·á¿¡ ±Ù°ÅÇÏ¿© ÀÓ»ó ºê¶óÄÏ Á¡µéÀ» ¼³Á¤ÇÏ¿´°í 4°³ÀÇ ¼± °èÃø°ú À̵éÀ» ÀÌ¿ëÇÏ¿© 2°³ÀÇ ºñÀ²À» ÃøÁ¤ÇÏ¿´´Ù. °¢ ºÎÁ¤±³ÇÕ±º¿¡¼­ ÃøÁ¤ Ç׸ñµé¿¡ °üÇÏ¿© t-test¸¦ ÇÏ¿´°í Ä¡¿­±Ã ÇüŸ¦ square, ovoid, tapered ÀÇ 3°¡Áö·Î ºÐ·ùÇÑ ÈÄ ºÐÆ÷ Ư¼º¿¡ °üÇÏ¿© Ä«ÀÌÁ¦°ö °ËÁ¤ÇÏ¿´´Ù. ±× °á°ú I±Þ°ú II±Þ ºÎÁ¤±³ÇÕ±º¿¡¼­ ÀϺ» ¿©¼ºÀÇ ÇÏ¾Ç Ä¡¿­±Ã Æø°æÀÌ ÀϺ»³²¼º, Çѱ¹ ³²¼º ¹× Çѱ¹ ¿©¼º¿¡ ºñÇØ ÀÛ¾ÒÀ¸¸ç, III±Þ ºÎÁ¤±³ÇÕ±ºÀÇ ÇÏ¾Ç Ä¡¿­±Ã Å©±â´Â ÀÎÁ¾À̳ª ¼ºº°¿¡ µû¸¥ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ±×¸®°í ¸ðµç ºÎÁ¤±³ÇÕ±º¿¡¼­ Çѱ¹Àΰú ÀϺ»ÀÎÀÇ ´ëºÎºÐÀÌ square¿Í ovoidÇÑ Ä¡¿­±Ã ÇüŸ¦ °¡Á³À¸¸ç II±Þ ºÎÁ¤±³ÇÕ±º¿¡¼­´Â ÀϺ»ÀÎÀº ovoid ÇüÅ°¡ 52.%À¸·Î °¡Àå ¸¹°í Çѱ¹ÀÎÀº square ÇüÅ°¡ 40%·Î °¡Àå ¸¹°Ô ³ªÅ¸³µ´Ù.

The purpose of this study was to compare arch dimensions and frequency distribution of arch forms between Korean and Japanese Class I, II, and III malocclusion groups.

Methods:The sample consisted of 368 Korean cases (114 Class I, 119 Class II, and 135 Class III malocclusion) and 160 Japanese cases (60 Class I, 50 Class II, and 50 Class III malocclusion). The most facial portion of 13 proximal contact areas was digitized from photocopied images of the mandibular dental arches. Clinical bracket slot points were calculated for each tooth based on mandibular tooth thickness data. Four linear and two proportional measurements were taken. Measurements are statistically analyzed in each malocclusion group. The dental arches were classified into square, ovoid, and tapered forms to determine and compare the frequency distributions between the two ethnic groups.

Results:The findings of this study showed that Japanese females in Class I and II groups had a statistically significant narrower mandibular dental arch width compared with the Japanese males, Korean males and Korean females. But in the Class III group, there was no significant difference in the mandibular dental arch size according to the two ethnic groups and genders.

Conclusions: The majority of Koreans and Japanese in all the malocclusion groups exhibited square and ovoid arch forms. The most frequent arch forms found in Koreans was square but ovoid for Japanese

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Ä¡¿­±Ã ÇüÅÂ;ºÎÁ¤±³ÇÕ;Ä¡¿­±Ã ºÐ·ù
Dental arch form;Malocclusion;Classification of dental arch form

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