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ARATIVE STUDY OF MAXILLARY SUPERIMPOSITION METHODS ON A LATERAL R NTGENOGRAPHIC CEPHALOMETRY

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Áø¿µÀÓ/Young-Yim Jean

Abstract

°á ·Ð
»ó¾Ç °ñ°³Á¶(maxillary remodeling) ¹× Ä¡¾ÆÀ̵¿À» Ricketts¹ý, Best-fit¹ý, ±¸Á¶¹ý
(Structural method)ÀÇ ¼¼°¡Áö »ó¾Ç Áßø ¹æ¹ýÀ¸·Î Àü·®ÇÏ¿© ±× °á°ú¸¦ ºñ±³Æò°¡Çϱâ À§ÇÏ
¿© º» ¿¬±¸¸¦ ½ÃÇàÇÏ¿´´Ù. Àü³²´ëº´¿ø ¼Ò¾ÆÄ¡°ú¿¡ ÀüÄ¡ºÎ ¹Ý´ë±³ÇÕÀ¸·Î Æò±Õ 8¼¼ºÎÅÍ 3³â4
°³¿ù°£ ¾ÇÁ¤Çü Ä¡·á¸¦ ¹ÞÀº ¼ºÀå±â ¾Æµ¿ 40¸í(³²¾Æ 9r¸í, ¿©¾Æ 13¸í)À» ´ë»óÀ¸·Î ÇÏ¿´´Ù. °¢
°¢ÀÇ Áßø¹æ¹ýÀ¸·Î ±âÁØÁ¡°ú °¢µµ º¯È­·®À» °èÃøÇÏ¿´°í, ±× °á°ú¸¦ ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº
°á·ÐÀ» ¾ò¾ú´Ù.
1. ±¸Á¶¹ýÀº PNSÀÇ ÈĹæÀ̵¿, ANS¿Í Point AÀÇ Àü¹æÀ̵¿ÀÌ °èÃøµÇ¾ú´Ù. ±¸Á¶¹ý¿¡ ºñÇØ
Ricketts¹ýÀº ¸ðµç ±âÁØÁ¡ÀÌ ÈĹæÀ̵¿ÇÑ °á°ú¸¦ ³ªÅ¸³»¾ú°í(P<0.05) Best-fit¹ýÀº À¯»ç ÇÑ
¼öÆòÀ̵¿À» ³ªÅ¸³Â´Ù(P>0.05).
2. ±¸Á¶¹ýÀº °ñ°Ý ±âÁØÁ¡ÀÇ ÇϹæÀ̵¿ÀÌ °èÃøµÈ ¹Ý¸é Ricketts¹ý°ú Best-fit¹ýÀº ºñ°­ÀúÀÇ
ÇϹæ°ñ°³Á¶°¡ °ÅÀÇ ÃøÁ¤µÇÁö ¾Ê¾Ò´Ù(P<0.05).
3. ±¸Á¶¹ý¿¡ ºñÇØ Ricketts¹ý°ú Best-fit¹ýÀº Ä¡¾Æ¸ÍÃâÀÌ 20-30% ÀûÀº °ÍÀ¸·Î °èÃøµÇ¾ú´Ù
(P<0.05).
4. ±¸Á¶¹ýÀº palatal planeÀÌ ¿¬±¸´ë»óÀÇ 43%¿¡¼­ ½Ã°è¹æÇâ ȸÀüÀ», 57%¿¡¼­´Â ¹Ý½Ã°è¹æ
Çâ ȸÀüÀ» ³ªÅ¸³ÂÀ¸³ª Ricketts¹ý¿¡¼­´Â º¯È­°¡ ¾ø¾ú°í Best-fit¹ý¿¡¼­´Â 97%¿¡¼­ ¹Ý ½Ã°è
¹æÇâ ȸÀüÀ» ³ªÅ¸³Â´Ù.
5. ±¸Á¶¹ý¿¡¼­ pa]anal plane°ú N-S lineÀÇ È¸Àü·®ÀÌ ³ôÀº »ó°ü°ü°è¸¦ ³ªÅ¸³»¾ú´Ù
(r=0.86).
6. ±¸Ä¡¿Í ÀüÄ¡ÀÇ Ä¡Ãà º¯È­´Â ¼¼ ¹æ¹ý°£¿¡ À¯ÀÇÂ÷°¡ ¾ø¾ú´Ù(P>0.05).
#ÃÊ·Ï#
This study was carried out to compare the amount of the maxillary bone remodeling
and tooth displacement in each three maxillary superimposition methods, Ricketts,
Best-fit, Structural method.
Forty cases of the lateral cephalometric radiographs from 27 boys and 13 girls who
had been treated to correct anterior cross-bite were selected for the study. The initial
radiographs were taken at about 8-year-old and the second radiographs were taken in
about 3.3 years later.
Followings were the results '
1. With the Structural method, backward movement was shown in PNS, while forward
movement was observed in ANS and point A. With the Ricketts method, however, all
structures were shown significant backward movement comparing with Structural
method (P<0.05). With the Best-fit method, the amount of horizontal movement was
similar to that of the Structural method (P>0.05).
2. The palate seemed to be moved downward with Structural method, but there was
no measured downward remodeling on nasal floor with Ricketts and Best-fit method (
P<0.05).
3. Comparing with Structural method, Ricketts and Best-fit method significantly
underestimated the eruption of the teeth by 20% to 30% (P<0.05).
4. The Structural method showed the anteroinferior rotation (43%) and posteroinferior
rotation(57%) of the palatal plane. while the Best-fit method showed mostly
anterosuperior rotation(87%), but no change was found in the Ricketts method.
5. With the Structural method, there was a statistically significant correlation between
the amount of the rotation of the palatal plane and that of N-S line(r=0.86).
6. The measured angles of the long axis of the incisors and molars showed no
significant difference in each 3 methods(P>0.05).

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