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Áï½Ã ºÎÇÏ ±³Á¤¿ë ¹Ì´ÏÀÓÇ÷£Æ®ÀÇ ¾ÈÁ¤¼º Æò°¡¸¦ À§ÇÑ Periotest¨ÞÀÇ À¯È¿¼º

The validation of Periotest values for the evaluation of orthodontic mini-implants¡¯ stability

Korean Journal of Orthodontics 2010³â 40±Ç 3È£ p.167 ~ 175
Â÷Á¤¿­, ȲÃæÁÖ, À¯Çü¼®,
¼Ò¼Ó »ó¼¼Á¤º¸
Â÷Á¤¿­ ( Cha Jung-Yul ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
ȲÃæÁÖ ( Hwang Chung-Ju ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç
À¯Çü¼® ( Yu Hyung-Seog ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ ±³Á¤Çб³½Ç

Abstract

Periotest¨Þ´Â º¸Ã¶¿ë ÀÓÇ÷£Æ® ½Ä¸³ 3 - 4°³¿ù ÈÄ °ñÀ¯Âø Á¤µµ¸¦ Æò°¡Çϱâ À§ÇØ »ç¿ëµÇ´Â µ¿¿äµµ ÃøÁ¤ ±â±â·Î ±³Á¤¿ë ¹Ì´ÏÀÓÇ÷£Æ® ¾ÈÁ¤¼º Æò°¡¿¡ Àû¿ë°¡´É¼ºÀÌ ³ô´Ù. º» ¿¬±¸´Â ±³Á¤¿ë ¹Ì´ÏÀÓÇ÷£Æ®ÀÇ ¾ÈÁ¤¼º Æò°¡¸¦ À§ÇØ Periotest¨ÞÀÇ À¯È¿¼ºÀ» °ËÁõÇÏ°íÀÚ ÇÏ¿´´Ù. ¼º°ß ´Ù¼¸ ¸¶¸®ÀÇ »ó¾Ç, ÇÏ¾Ç ÇùÃø°ñ¿¡ ±³Á¤¿ë ¹Ì´ÏÀÓÇ÷£Æ®¸¦ ½Ä¸³ÇÏ°í, ½Ä¸³ ½Ã ½Ä¸³Åä¿ÀÅ©¿Í µ¿¿äµµ¸¦ ÃøÁ¤ÇÏ°í 12ÁÖ µ¿¾È ±³Á¤·ÂÀ» ºÎ¿©ÇÑ ÈÄ, Á¦°Å ½Ã Á¦°Å Åä¿ÀÅ©¿Í µ¿¿äµµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. µ¿¿äµµ (Periotest¨Þ value, PTV) ÃøÁ¤Àº ÀçÇö¼ºÀ» À§ÇØ µ¿ÀÏ ºÎÀ§¿¡ 2ȸ ÃøÁ¤ÇÏ¿´´Ù. PTV¿Í ´Ù¸¥ º¯¼ö¿ÍÀÇ »ó°ü¼º ºÐ¼®À» À§ÇØ ¸ðµç ½ÇÇè°ßÀº CT ÃÔ¿µ ÈÄ ½Ä¸³ ºÎÀ§ÀÇ °ñ¹Ðµµ¿Í ÇÇÁú°ñ µÎ²²¸¦ °èÃøÇÏ¿´´Ù. µ¿¿äµµ ÃøÁ¤¿¡ ´ëÇÑ ÀçÇö¼ºÀº 0.96ÀÇ »ó°ü°è¼ö¸¦ ³ªÅ¸³» ¸Å¿ì ³ô¾ÒÀ¸¸ç (p £¼ 0.001) °ñ¹Ðµµ¿Í ÇÇÁú°ñ µÎ²²¿¡ ÀÖ¾î ÇϾǰñ ÇùÃøÄ¡Á¶°ñÀÌ »ó¾Ç°ñ¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ÄÇ´Ù (p £¼ 0.05). 12ÁÖ µ¿¾È PTV °ªÀº ?3.2¿¡¼­ 4.8ÀÇ ¹üÀ§¸¦ ³ªÅ¸³»¸ç ¸ðµç ÀÓÇ÷£Æ®´Â ÀÓ»óÀûÀ¸·Î ¾ÈÁ¤ÀûÀ̾ú´Ù. ½Ä¸³ ½Ã PTV °ªÀº ÇϾǿ¡¼­ ½Ä¸³ Åä¿ÀÅ©(?0.51), °ñ¹Ðµµ(?0.48), ÇÇÁú°ñ µÎ²²(?0.42)¿Í »ó°ü¼ºÀÌ ÀÖ¾úÀ¸³ª (p £¼ 0.05), »ó¾Ç¿¡¼­´Â »ó°ü¼ºÀÌ ¾ø¾ú´Ù. Á¦°Å ½Ã PTV °ªÀº ÇϾǿ¡¼­ Á¦°Å Åä¿ÀÅ©(?0.66)¿Í »ó°ü¼ºÀÌ ÀÖ¾úÀ¸¸ç
(p £¼ 0.05), »ó¾Ç¿¡¼­´Â »ó°ü¼ºÀÌ ¾ø¾ú´Ù. ÀÌ»óÀÇ °á°ú´Â Periotest¨Þ¸¦ ÀÌ¿ëÇÏ¿© ±³Á¤¿ë ¹Ì´ÏÀÓÇ÷£Æ®ÀÇ ¾ÈÁ¤¼ºÀ»
°£Á¢ÀûÀ¸·Î Æò°¡ÇÒ ¼ö ÀÖÀ¸³ª °ñ¹Ðµµ°¡ ³ô°í ÇÇÁú°ñÀÌ µÎ²¨¿î ºÎÀ§¿¡¼­ Á¦ÇÑÀûÀ¸·Î ÀÀ¿ëÇÒ ¼ö ÀÖÀ½À» ½Ã»çÇÑ´Ù.

Objective: The aim of this study was to validate the Periotest values for the prediction of orthodontic mini-implants¡¯ stability.

Methods: Sixty orthodontic mini-implants (7.0 mm x ¨ª1.45 mm; ACR, Biomaterials Korea, Seoul, Korea) were inserted into the buccal alveolar bone of 5 twelve month-old beagle dogs. Insertion torque (IT) and Periotest values (PTV) were measured at the installation procedure, and removal torque (RT) and PTV were recorded after 12 weeks of orthodontic loading. To correlate PTV with variables, the cortical bone thickness (mm) and bone mineral density (BMD) within the cortical bone and total bone area were calculated with the help of
CT scanning.

Results: The BMD and cortical bone thickness in mandibular alveolus were significantly higher than those of the maxilla (p £¼ 0.05). The PTV values ranged from ?3.2 to 4.8 for 12 weeks of loading showing clinically stable mini-implants. PTV at insertion was significantly correlated with IT (?0.51), bone density (?0.48), cortical bone thickness (?0.42) (p £¼ 0.05) in the mandible, but showed no correlation in the maxilla. PTV before removal was significantly correlated with RT (?0.66) (p £¼ 0.01) in the mandible.

Conclusions: These results show that the periotest is a useful method for the evaluation of mini-implant stability, but it can only be applied to limited areas with thick cortical and high density bone such as the mandible.

Å°¿öµå

Periotest;¹Ì´ÏÀÓÇ÷£Æ®;½Ä¸³ Åä¿ÀÅ©;µ¿¿äµµ
Periotest;Orthodontic mini-implants;Insertion torque;Mobility

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