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A COMPARATIVE STUDY ON THE ACCURACY OF THE ANALYSIS METHODS FOR THE MIXED DENTITION

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Abstract

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°èÃøÇÏ°í 4°¡Áö È¥ÇÕÄ¡¿­±â °ø°£ ºÐ¼® ¹æ¹ý¿¡ µû¶ó ¿¹ÃøÄ¡¸¦ »êÃâÇÑ ´ÙÀ½ ½ÇÁ¦Ä¡¿Í ºñ±³ÇÏ
¿© °¢ ¹æ¹ýµé¿¡ ´ëÇÑ Á¤È®µµ¸¦ ºñ±³ Æò°¡ÇÑ ¹Ù ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. ÇÏ¾Ç ¿µ±¸ °ßÄ¡ ¹× ¼Ò±¸Ä¡ÀÇ ±Ù¿ø½É Æø°æÇÕÀÇ ½ÇÁ¦Ä¡¿Í ¿¹Ãø½Ã »çÀÌÀÇ »ó°ü °è¼ö´Â
Ballard¿Í Wylie¹æ¹ý¿¡¼­ 0.685, Moyers¹æ¹ý¿¡¼­ 0.670, Tanaka¿Í Johnston¹æ¹ý¿¡¼­ 0.683,
¼ÛµîÀÇ ¹æ¹ý¿¡¼­ 0.681 ÀÌ¿´´Ù.
2. ÇÏ¾Ç ¿µ±¸ °ßÄ¡ ¹× ¼Ò±¸Ä¡ÀÇ ±Ù¿ø½É Æø°æÇÕÀÇ ½ÇÁ¦Ä¡ÀÇ Æò±Õ°ú 4°¡Áö È¥ÇÕÄ¡¿­±â °ø°£
ºÐ¼® ¹æ¹ýÀ¸·Î »êÃâÇÑ ¿¹ÃøÄ¡¿Ü Æò±Õ°úÀÇ Â÷ÀÌ´Â Ballard¿Í Wylie¹æ¹ý¿¡¼­ 0.078mm, ¼Ûµî
ÀÇ ¹æ¹ý¿¡¼­ 0.035mm·Î °¡Àå Àû¾ú´Ù.
3. ½ÇÁ¦Ä¡¿Í ¿¹ÃøÄ¡ »çÀÌÀÇ »ó°ü °è¼ö¿Í Æò±ÕÄ¡ Â÷ÀÌ¿¡ µû¸¥ Á¤È®µµ¸¦ Æò°¡ÇßÀ» ¶§ Bollard
¿Í Wylie¹æ¹ý°ú ¼ÛµîÀÇ ¹æ¹ýÀÌ ³ôÀº Á¤È®µµ¸¦ ³ªÅ¸³Â´Ù.
4. 4°¡Áö ¹æ¹ýÀ» °¢°¢ º´¿ëÇÑ °æ¿ì´Â Ballard¿Í Wylie¹æ¹ý ¹× ¼ÛµîÀÇ ¹æ¹ýÀ» º´¿ëÇؼ­ »ç
¿ëÇÏ¿´À» ¶§ ½ÇÁ¦Ä¡¿Í °¡Àå ±ÙÁ¢ÇÑ °á°ú¸¦ ³ªÅ¸³Â´Ù.

This study was performed in order to determine the accuracy of 4 mixed dentition
analysis methods and combinations of these methods in Korean. The samples in this
study were mandibular casts of 107 Koreans with normal occlusion of permanent
dentition, ranging in age from 12 years to 25 years. Measurements of mesiodistal widths
of the mandibular four anterior teeth and mandibular canine and premolars were
obtained from the casts. Actual mesiodistal widths of mandibular canine and premolars
compared with predicted widths of mandibular canine and premolars taken by 4
prediction methods.
From this study, the following conclusions were made :
1. Correlation coefficients for the sum of mesiodistal widths of the mandibular canine
and Premolars with their predicted values obtained by each of the 4 prediction methods
revealed 0.685 for Ballard and Wylie, 0.670 for Moyers, 0.683 for Tanaka and Johnston
and 0.681 for Song etc.
2. In differences between average actual width and average predicted width of
mandibular canine and premolars, Song etc. method had the minimum difference value
with 0.034mm and Ballard and Wylie method did the second value with 0.078mm.
3. The statistical significances of the correlation coefficients 3nd average differences
revealed that Ballard and Wylie method and Song etc method exhibited the closest
results with actual values.
4. In case of the each combination methods, the combination of Ballard and Wylie
method and Song etc. method revealed the closest value from the actual values.

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