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A study on the error of tooth size measurements

Korean Journal of Orthodontics 1999³â 29±Ç 4È£ p.491 ~ 502
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Abstract

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1. 3ȸ ÃøÁ¤¿¡ µû¸¥ ÀçÇöµµ´Â Á¶»çÀÚº° Ä¡¾Æº°·Î Å« Â÷À̸¦ ³ªÅ¸³»Áö ¾Ê¾Ò´Ù.
2. Ç¥ÁØÄ¡¿Í ºñ±³ÇÑ °èÃø¿ÀÂ÷´Â Á¶»çÀÚº° ¶Ç´Â Ä¡¾Æº°·Î Â÷À̸¦ º¸¿´´Ù.
3. Ç¥ÁØÄ¡¿ÍÀÇ ¿ÀÂ÷´Â ÀüÄ¡¿¡¼­ ±¸Ä¡·Î °¥¼ö·Ï Áõ°¡ÇÏ¿© Á¦ 1´ë±¸Ä¡¿¡¼­ °¡Àå Å« Â÷À̸¦ ³ª
Ÿ³»¾ú´Ù.
4. Ç¥ÁØÄ¡¿Í ºñ±³½Ã Àü¹ÝÀûÀ¸·Î ÀÛ°Ô ÃøÁ¤ÇÏ´Â °æÇâÀ» º¸¿´À¸¸ç ÀÌ¿¡ ´ëÇÑ Ä¡¾Æº°, Á¶»çÀÚº°
Â÷ÀÌ°¡ µÎµå·¯Á³´Ù.
5. Àü¹ÝÀûÀÎ ¿ÀÂ÷ ¹ß»ý Á¤µµ´Â Ä¡¾Æ¹ÐÁý Á¤µµ¿Í À¯ÀÇÇÑ »ó°ü¼ºÀ» º¸ÀÌÁö ¾Ê¾Ò´Ù.
ÀÌ»óÀÇ °á°ú´Â ±³Á¤Áõ·Ê ºÐ¼®½Ã Ä¡¾ÆÅ©±â °èÃø¿ÀÂ÷ ¹ß»ý °¡´É¼ºÀÇ °í·Á°¡ ÇÊ¿äÇÔÀ» ½Ã»ç
ÇÏ¿´´Ù.
#ÃÊ·Ï#
Precise and accurate measuring of tooth size is essential procedure in orthodontic
diagnosis. The purpose of this study was to evaluate the reproducibility and accuracy of
tooth size measurements with regard to tooth and investigator.
Five investigators measured the size of one side of teeth, from central incisor to first
molar, on 20 sets of casts that show a moderate degree of crowding. Mesio-distal width
was measured with digital vernier calipers in each tooth and this procedure was
repeated three times at two weeks interval. To obtain a standard measurement for each
tooth, dental casts were cut into individual tooth, and its width was measured with
micrometer. The difference between the measurement from dental cast and the standard
measurement was defined as the measurement error. Through various statistical
analyses, following results were obtained.
1. The reproducibility did not show significant differences with regard to tooth or
investigator.
2. The measurement error showed some difference with regard to tooth and investigator.
3. The magnitude of the measurement error showed increasing tendency from anterior to
posterior teeth with maximum value in the first molar.
4. While the measurements obtained on study casts generally showed smaller number
compared to standard measurements, the direction of the difference showed variability
according to tooth or investigator.
5. The measurement errors did not show significant correlations with the degree of
crowding.
The results of the present study indicate that the possibility of tooth size
measurement error should be taken into consideration when diagnosing an orthodontic
case.

Å°¿öµå

Ä¡¾ÆÅ©±â; ÀçÇöµµ; Á¤È®µµ; °èÃø¿ÀÂ÷; tooth size; reproducibility; accuracy; measurement error;

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