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The Effect of Tomographic Angles on the Osteophytic Lesion Detectability of the Mandibular Condyle

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Abstract

ÀúÀÚ´Â °ÇÁ¶ µÎ°³°ñÀÇ ÇϾǰúµÎ¿¡ Å©±â°¡ ´Ù¸¥ 0.3 §®, 0.7 §®, 1.0 §®, 2.0 §®ÀÇ °ñ Áõ½Ä¼º
º´¼Ò¸¦ Çü¼ºÇÑ ÈÄ SCANORAS ¸¦ ÀÌ¿ëÇÏ¿©, ÃøÁ¤µÈ ÇϾǰúµÎÀÇ ¼öÆò°¢µµ 15¡Æ¿Í ÀÌ °¢µµ
¿¡¼­ °¢°¢-10¡Æ, +10¡Æ, +20¡ÆÀÇ º¯È­¸¦ ÁØ °¢µµ¿¡¼­ÀÇ Ãø¹æ ´ÜÃþ¹æ»ç¼±»çÁøÀ» ¼¼ ¸íÀÇ Ä¡
°ú¹æ»ç¼±°ú Àü°øÀÇ°¡ °¢°¢ µÎ ¹ø¾¿ Æǵ¶ÇÏ¿© º´¼Ò°¡ ºÐ¸íÈ÷ ÀÖ´Â °æ¿ì¸¦ 2, º´¼Ò°¡ ÀÖ´Â °Í
°°´Ù°í »ý°¢µÇ´Â °æ¿ì¸¦ 1, º´¼Ò°¡ È®½ÇÈ÷ ¾ø´Â °æ¿ì¸¦ 0À¸·Î Á¡¼ö¸¦ ÁØ data¸¦ Tukey
method¿Í kappa value·Î ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. °¢°¢ÀÇ ´ÜÃþÃÔ¿µ °¢µµ¿¡¼­ º´¼ÒÀÇ Å©±â¿¡ µû¸¥ º´¼ÒÀÇ ÀÎÁöµµÀÇ Æò±Õ°ªÀ» Á¶»çÇÑ °á°ú,
0.3 §® º´¼ÒÀÎ °æ¿ì ¸ðµç °¢µµ¿¡¼­ º´¼Ò¸¦ °ÅÀÇ ÀÎÁöÇÏÁö ¸øÇÏ¿´À¸¸ç º´¼ÒÀÇ Å©±â°¡ Ä¿Áú¼ö
·Ï Æò±Õ°ªÀÌ Áõ°¡ÇÏ¿© 2.0 §® º´¼Ò¿¡¼­´Â ´Ù¾çÇÏ°Ô º¯È­µÈ °¢µµ¿¡¼­ÀÇ Æò±Õ°ªÀÌ ±âÁØ °¢µµ
15¡ÆÀÇ Æò±Õ°ª°ú °ÅÀÇ °°Àº °ªÀ» °¡Áö¸é¼­ ¸Å¿ì ³ô°Ô ³ªÅ¸³µ´Ù.
2. ´ÜÃþÃÔ¿µ °¢µµÀÇ º¯È­½Ã °ñ Áõ½Ä¼º º´¼ÒÀÇ Å©±â Â÷ÀÌ¿¡ µû¸¥ º´¼ÒÀÇ ÀÎÁöµµ¸¦ ºñ±³ÇÑ
°á°ú, 0.7 §®Å©±âÀÇ º´¼Ò¿¡¼­´Â ±âÁØ °¢µµ 15¡Æ¿Í º¯È­½ÃŲ °¢µµ¿ÍÀÇ ºñ±³¿¡¼­ ¸ðµÎ À¯ÀǼº
ÀÖ´Â Â÷À̸¦ º¸¿´´Ù(p<0.05). 1.0 §® º´¼ÒÀÎ °æ¿ì 10¡Æ º¯È­ÀÇ ºñ±³¿¡¼­´Â À¯ÀǼº ÀÖ´Â Â÷ÀÌ
°¡ ¾ø¾úÀ¸³ª (p>0.05), +20¡Æ º¯È­ÀÇ ºñ±³¿¡¼­ À¯ÀǼº ÀÖ´Â Â÷À̸¦ º¸¿´´Ù (p<0.05). 0.3 §®,
2.0 §® º´¼Ò¿¡¼­´Â ±âÁØ °¢µµ 15¡Æ¿Í º¯È­½ÃŲ ¸ðµç °¢µµÀÇ ºñ±³¿¡¼­ À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡
¾ø¾ú´Ù (p>0.05).
3. ´ÜÃþÃÔ¿µ °¢µµÀÇ º¯È­½Ã º´¼ÒÀÇ ºÎÀ§ Â÷ÀÌ¿¡ µû¸¥ º´¼ÒÀÇ ÀÎÁöµµ¸¦ ºñ±³ÇÑ °á°ú, ÇϾÇ
°úµÎ»óÀÇ ³»Ãø, Áß»óºÎ, ¿ÜÃøºÎ¿¡¼­´Â ±âÁØ °¢µµ 15¡Æ¿Í º¯È­½ÃŲ °¢µµ¸¦ ºñ±³ÇÑ ¸ðµç °æ¿ì
¿¡¼­ À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù (p>0.05). Àü ³»Ãø, Àü»óºÎ, Àü¿ÜÃø¿¡¼­´Â 10¡Æ º¯È­ÀÇ ºñ±³
¿¡¼­ À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾úÀ¸³ª (p>0.05), +20¡Æ º¯È­ÀÇ ºñ±³¿¡¼­´Â À¯ÀǼº ÀÖ´Â Â÷À̸¦
º¸¿´´Ù (p<0.05).
°á·ÐÀûÀ¸·Î SCANORAR¸¦ ÀÌ¿ëÇÑ ÃøµÎÇϾǰüÀýÀÇ Ãø¹æ ´ÜÃþÃÔ¿µ½Ã 2 mm
ÀÌ»óÀÇ °ñ Áõ½Ä¼º º´¼Ò¿¡¼­ ÇϾǰúµÎÀÇ ¼öÆò°¢µµ¿ÍÀÇ Â÷ÀÌ°¡ +20¡Æ À̳»ÀÎ °æ¿ì ÀÌ·¯ÇÑ ´Ü
ÃþÃÔ¿µ °¢µµÀÇ º¯È­°¡ º´¼ÒÀÇ ÀÎÁöµµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀº ¸Å¿ì ÀûÀ¸¸ç 1 mmº´¼Ò¿¡¼­ ÇϾǰú
µÎÀÇ ¼öÆò°¢µµ¿ÍÀÇ Â÷ÀÌ°¡ ¡¾10¡Æ À̳»ÀÎ °æ¿ì ´ÜÃþÃÔ¿µ °¢µµÀÇ º¯È­°¡ º´¼ÒÀÇ ÀÎÁöµµ¿¡ ¹Ì
Ä¡´Â ¿µÇâÀº ¸Å¿ì Àû´Ù°í »ý°¢µÇ¾îÁø´Ù.
#ÃÊ·Ï#
Purpose : To find out the effects that different tomographic angles have on the
osteophytic lesion detectability of condyle head by comparison the individualized lateral
tomographic image with the various tomographic angled images using
SCANORAR.
Materials & Methods : This study is performed to simulate osteophytic lesions by a
series of dentin chips placed at six locations on condyle head. The control angle is 15¡Æ
and from this angle, tomographic angle were varied with -10¡Æ, +10¡Æ, +20¡Æ. All the
images with each sized dentin chip were scored by three dental radiologists with the
use of confidence levels for presence or absence of the lesion, each examiner viewed one
of the images twice. A rating scale from 0 to 2 (0, lesion definitely not present; 1,
uncertain if lesion is present; 2, lesion definitely present). Responses were assessed by
Tukey's multiple comparison method and kappa value.
Results :
1. The lesion size of 0.3 §® could not be detected in all the tomographic angles. As
the size of the lesion increased the average value of lesion detectability also increased.
2. In the lesion sizes of 0.7 §® there was statistically significant difference between
the 15¡Æ control angle and the altered tomographic angles (p<0.05). In 1.0 mm lesion
there was no significant difference in the ¡¾10¡Æ altered angles (p>0.05), but there was
significant difference in the altered angle (p<0.05) In the lesion sizes of 0.3 mm and 2.0
am there was no significant difference between the 15¡Æ control angle and all the
altered angles (p>0.05).
3. In the anteromedial. anterosuperior, anterolateral area there was no significant
difference between the 15¡Æ control angle and the ¡¾10¡Æ altered angle (p>0.05), but in
the comparison with the +20¡Æ altered angle these was significant difference (p<0.05).
Conclusion : When imaging the lateral tomography of the temporomandibular joint
used by SCANORAR it can be considered that in the osteophytic lesion
size of 2 §® and above, the tomographic angle difference within +20¡Æ to the horizontal
angle of the condyle, has little effect on the lesion detectability. And in the lesion size
of 1 §® the altered angle within ¡¾10¡Æ also has little effect on the lesion detectability.

Temporomandibular joint; mandibular condyle; homographic angle; SCANORAR lateral tomography; osteophytic lesion;

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