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he Accuracy of the Digital Imaging System and the Frequency Dependent Type Apex Locator in Root Canal Length Measurement

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Abstract

ÇöÀç ÀÓ»ó¿¡¼­ ±Ù°üÀåÃøÁ¤À» À§ÇÏ¿© »ç¿ëÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ¸·Î Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø ÃÔ
¿µ ,µðÁöÅ» ¿µ»ó½Ã½ºÅÛÀÎ DigoraR, ÁÖÆļöÀÇÁ¸Çü ÀüÀÚ±Ù°üÀåÃøÁ¤ÀåÄ¡ÀÎ Root
ZXR¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀÌ ÀÖ´Ù.
ÀÌ¿¡ ÀúÀÚ´Â ¼¼ °³ÀÇ ±Ù°üÀåÃøÁ¤¹æ¹ýÀΠǥÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø, µðÁöÅ» ¿µ»ó½Ã½ºÅÛÀÎ
DigoraR, ÁÖÆļöÀÇÁ¸Çü ÀüÀÚ±Ù°üÀåÃøÁ¤ÀåÄ¡ÀÎ Root ZXR¸¦ ÀÌ
¿ëÇÏ¿© ±Ù°üÀåÀÇ ±æÀ̸¦ ÃøÁ¤ÇÏ¿© Ä¡¾Æ ±Ù÷ºÎ±îÁöÀÇ ½ÇÃøÄ¡¿Í ºñ±³ ºÐ¼®ÇÏ¿© °¢°¢ÀÇ ±Ù°ü
ÀåÃøÁ¤¹æ¹ýÀÇ Á¤È®¼º°ú ÀÓ»óÀû À¯¿ë¼ºÀ» Æò°¡ÇÏ°í °üÂûÀÚ¿Í fileÀÇ ±½±â°¡ °¢°¢ÀÇ ±Ù°üÀå Ãø
Á¤¹æ¹ý¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº½À¸·Î½á ±Ù°üÄ¡·á °èȹ¼ö¸²¿¡ µµ¿òÀ» ÁÖ°íÀÚ ´ÙÀ½°ú °°ÀÌ ¿¬
±¸¸¦ ½ÃÇàÇÏ¿´´Ù 29°³ÀÇ °ÇÀüÇÑ ´Ü±Ù ¼Ò±¸Ä¡ÀÇ 39°³ÀÇ ±Ù°üÀ» ´ë»óÀ¸·Î 3ÀÎÀÇ Ä¡°úÀǻ簡
15¹ø, 20¹ø, 25¹ø file·Î Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø°ú DigoraR system, Root
ZXR¸¦ ÀÌ¿ëÇÏ¿© ±Ù°üÀå±æÀ̸¦ ÃøÁ¤ÇÑ °£°ú Ä¡¾Æ¸¦ Àý´ÜÇÏ¿© Ä¡¾ÆÀÇ ±³ÇÕ¸é
¿¡¼­ ±Ù÷ÇùÂøºÎ±îÁöÀÇ ½ÇÁ¦ ±æÀ̸¦ ºñ±³ ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø, DigoraR system, Root ZXR¸¦ ¾Ö
¿ëÇÏ¿© ¾òÀº ÃøÁ¤°ª°ú Ä¡¾ÆÀÇ ±³Çո鿡¼­ ±Ù÷ÇùÂøºÎ±îÁöÀÇ ½ÇÁ¦ ±æÀÌ¿ÍÀÇ Æò±Õ¿ÀÂ÷¸¦ ºñ±³
ÇÑ °á°ú Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼± »çÁø(Æò±Õ¿ÀÂ÷ : -0.449¡¾0.444 §®)°ú DigoraR
system(Æò±Õ¿ÀÂ÷ : -0.417¡¾0.415 §®)¿¡¼­´Â ¸ðµç °æ¿ì¿¡¼­ Åë°èÇÐÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ
°¡ ÀÖ¾úÀ¸³ª(p<0.05), Root ZXR(Æò±Õ¿ÀÂ÷ : 0.123¡¾0.458 §®)¿¡¼­´Â Åë°èÇÐÀû
À¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù. (p>0.05).
2. Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø, Digora system, Root ZXR¸¦ ÀÌ¿ëÇÏ¿© ¾òÀº Ãø
Á¤ °ª°ú Ä¡¾ÆÀÇ ±³Çո鿡¼­ ±Ù÷ÇùÂøºÎ±îÁöÀÇ ½ÇÁ¦ ±æÀÌÀÇ Â÷ÀÇ Àý´ë°ªÀÇ ºÐÆ÷¸¦ ºÐ¼®ÇÑ °á
°ú ÀÓ»óÀûÀ¸·Î Çã¿ë°¡´ÉÇÑ ¿ÀÂ÷ÀÎ 0.5§® À̳»ÀÎ °æ¿ì°¡ Àüü 261°³ÀÇ °æ¿ìÁß Ç¥ÁØ Ä¡±Ù´Ü
¹æ»ç¼±»çÁø¿¡¼­´Â 140°³ (53.6%), DigoraR system¿¡¼­´Â 151°³ (57.8%)¿´À¸
³ª Root R¿¡¼­´Â 197°³(75.5%)·Î ³ªÅ¸³µ´Ù.
3. fileÀÇ ±½±â°¡ °¢ ÃøÁ¤¹æ¹ý¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡Çϱâ À§Çؼ­ fileÀÇ ±½±â¿¡ µû¶ó ÃøÁ¤°ª
À» ºÐ¼®ÇÑ °á°ú fileÀÇ ±½±â¿¡ µû¸¥ °¢ ±Ù°üÀåÃøÁ¤¹æ¹ýÀÇ ÃøÁ¤°ª¿¡´Â Åë°èÇÐÀûÀ¸·Î À¯ÀǼº
ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù(p>0.05).
4. °¢ ±Ù°üÀåÃøÁ¤¹æ¹ýÀÇ Â÷À̸¦ Æò°¡Çϱâ À§ÇÏ¿© ÃøÁ¤¹æ¹ý°£ÀÇ ÃøÁ¤°ªÀ» ºñ±³ÇÑ °áÆÄ Ç¥
ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø°ú DigoraR systemÀº Åë°èÇÐÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡
¾ø¾úÀ¸³ª (p>0.05), Root ZXR¿Í Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁø, Root
ZXR¿Í DigoraR systemÀº Åë°èÇÐÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡
ÀÖ¾ú´Ù(p<0.05).
°á·ÐÀûÀ¸·Î ±Ù°üÀåÀ» °áÁ¤ÇÏ´Â ¹æ¹ýÀ¸·Î¼­ Root ZXR°¡ Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç
¼±»çÁø°ú Digora systemº¸´Ù ´õ ³ôÀº Á¤È®¼ºÀ» ³ªÅ¸³» ÀÓ»óÀûÀ¸·Î Root ZXR
°¡ ¸Å¿ì À¯¿ëÇÒ °ÍÀ¸·Î »ý°¢µÈ´Ù. ±×·¯³ª Root ZXR ¸¸À¸·Î´Â Àü¹ÝÀûÀÎ Ä¡±Ù
ÀÇ Çüųª ¼ö, ¸ð¾ç µîÀº ¾Ë ¼ö ¾ø°í Ä¡±Ù´Ü°øÀÌ ¿©·¯ ¿øÀÎÀ¸·Î ¿­·ÁÀÖ´Â °æ¿ì ±× Á¤È®¼ºÀÌ
¸Å¿ì ÀǽɵǹǷΠRoot ZXR¿Í ¹æ»ç¼±»çÁøÀÇ º´ÇàÀº Á¤È®ÇÑ ±Ù°üÀåÀ» °áÁ¤ÇÏ
´Âµ¥ ÇʼöÀûÀ̶ó°í ÇÒ ¼ö ÀÖ´Ù. ¶Ç ÃÔ¿µ°á°ú°¡ Áï½Ã ÇÊ¿äÇÑ ±Ù°üÄ¡·á½Ã¿¡´Â Çö»ó ½Ã°£ÀÌ ÇÊ
¿ä¾ø°í ³ëÃâ·®µµ ÁÙÀÏ ¼ö ÀÖ´Â DigoraR systemÀÌ Ç¥ÁØ Ä¡±Ù´Ü ¹æ»ç¼±»çÁøº¸
´Ù ´õ À¯¿ë ÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
In order to achieve a successful endodontic treatment, root canals must be obturated
three-dimensionally without causing any damage to apical tissues. Accurate lengh
determination of the root canal is critical in this case. For this reason, I' ve used the
conventional periapical radiography, DigoraR (gital imaging system) and
Root ZXR the frequency dependent type apex locator) to measure the
length of the canal and compare it with the true length obtained by cutting the tooth
in half and measuring the length between the occlusal surface and the apicalforamen.
From the information obtained by these measurements, 1 was able to evaluate the
accuracy and clinical usefulness of each systems, whether the thickness of files used in
endodontic therapy has any effect on the measuring systems was also evaluated in an
effort to simplify the treatment planning phase of endodontic treatment.29 canals of 29
sound premolars were measured with #15, #20, #25 files by 3 different dentists each
using the periapical radiograchy, DigoraR and Root ZXR The
measurements were then compared with the true length..
The results were as follows :
1. In comparing mean discrepancies between measurements obtained by using
periapical radiography(mean error -0.449¡¾0.441 §®), DigoraR(mean error :
-0.417¡¾0.415 §®) and Root ZXR(mean error 0.123¡¾0.458 §®) with true
length, periapical radiography and DigoraR system had statistically
significant differences(p<0.05) in most cases while Root BXR showed
none(p>0.05).
2. By subtracting values obtained by using periapical radiograchy,
DigoraR and Root ZXR from the true length and making a
distribution table of their absolute values, the 1311owing analysis was possible.
In the case of periapical film, 140 out of 261(53.6%) were clinically acceptable
satisfying the margin of error of less than 0.5 §®, 151 out of 561 (53,6%) were
acceptable in the DigoraR system while Root ZXR had 197
out of 261 (75.5%) within the limits of 0.5 §® margin of error.
3. Tn determining whether the thickness of files has any effect on measuring
methods, no statistically significant differences were found(p>0.05).
4. In comparing data obtained from these methods in order to evaluate the difference
among measuring methods, there was no statistically significant difference between
periapical radiography and DigoraR system(p.0.05), but there was
statistically significant difference between Root ZXR and periapical
radiography(p<0.05). Also, there was statistically significant difference between Root
ZXR and DigoraB system(p<0.05),
In conclusion, Root ZXR was more accurate when compared with the
DigoraR system and Periapical radiography and seems to be more effe
ctive clinically in determining root canal length. But Root ZXR has its
limits in determining root morphology and number of roots and its accuracy becomes
questionable when apical foramen is open due to unknown reasons. Therefore the
combined use of Root ZXR and the Periapical radiograchy are mandatory.
DigoraR system seems to be more effective when Periapical radiograpy are
needed in a short period of time because of its short processing time and less exposure.

Å°¿öµå

/papers/Ä¡°ú¹æ»ç¼±/1998-28-2/435-459.pdf; Root canal length measurement; DigoraR system; Standard periapical radiograph; Root ZXR; Frequency dependent type apex locator; Apical constriction.;

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