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Accuracy of the CT guided implant template by using an intraoral scanner according to the edentulous distance

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°­º´±æ ( Kang Byeong-Gil ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÈñÁß ( Kim Hee-Jung ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
Á¤ÀçÇö ( Jeong Jae-Hyeon ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¸ñÀû: ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº ±¸°­½ºÄ³³Ê¸¦ ÀÌ¿ëÇÏ¿© Á¦ÀÛµÈ ÀÓÇöõÆ® ¼ö¼ú¿ë ÇüÆÇÀÇ ¹«Ä¡¾Ç °Å¸®¿¡ µû¸¥ Á¤È®¼ºÀ» ºñ±³ÇÏ´Â °ÍÀÌ´Ù.

Àç·á ¹× ¹æ¹ý: ¹æ»ç¼±ºÒÅõ°ú¼º ¾ÆÅ©¸± ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© »ó¾Ç Á¿ì Á¦2¼Ò±¸Ä¡, Á¦1´ë±¸Ä¡, Á¦2´ë±¸Ä¡ ºÎÀ§¸¦ Ä¡¾Æ»ó½Ç »óÅ·Π5°³ÀÇ »ó¾Ç ¸ðÇüÀ» Á¦ÀÛÇÏ°í °¢°¢ÀÇ ¸ðÇüÀ» ±¸°­½ºÄ³³Ê¸¦ ÀÌ¿ëÇÏ¿© °¡»ó ¸ðÇüÀ» ȹµæÇÏ¿´´Ù. ¸ðÇüÀÇ ¼úÀü CT DICOM file°ú °¡»óÀÇ ¸ðÇüÀ» Áßø ÈÄ Ä¡¾Æ »ó½Ç ºÎÀ§¿¡ ÀÓÇöõÆ® ½Ä¸³À» °èȹÇÏ¿´°í Á¦ÀÛµÈ ¼ö¼ú¿ë ÇüÆÇÀ» ÀÌ¿ëÇÏ¿© ÀÓÇöõÆ® ½Ä¸³ ÈÄ ¼úÈÄ CT ÃÔ¿µÀ» ½ÃÇàÇÏ¿´´Ù. ¼úÀü CT¿Í ¼úÈÄ CT¸¦ software»ó¿¡¼­ Áßø ÈÄ X, Y, ZÃàÀ» ÀÌ¿ëÇÏ¿© ÀÓÇöõÆ®ÀÇ platform°ú apex ºÎÀ§¿¡¼­, °èȹµÈ ÀÓÇöõÆ®¿Í ½ÇÁ¦ ½Ä¸³µÈ ÀÓÇöõÆ®ÀÇ °Å¸® ¹× °¢ ¿ÀÂ÷¸¦ ÃøÁ¤ÇÏ°í Kruskall-Wallis test¿Í Mann-Whitney test¸¦ »ç¿ëÇÏ¿© Åë°èºÐ¼®À» ½ÃÇàÇÏ¿´´Ù.

°á°ú: ÀÓÇöõÆ® ½Ä¸³ °¢µµ ¿ÀÂ÷´Â Á¦2¼Ò±¸Ä¡¿¡¼­ Á¦2´ë±¸Ä¡·Î °¥¼ö·Ï Ä¿Á³À¸³ª Åë°èÀû Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò°í platform ºÎÀ§¿Í apexºÎÀ§¿¡¼­ÀÇ ½Ä¸³ °Å¸® ¿ÀÂ÷ ¶ÇÇÑ Á¦2¼Ò±¸Ä¡¿¡¼­ Á¦2´ë±¸Ä¡·Î °¥¼ö·Ï Ä¿Áö³ª Á¦2´ë±¸Ä¡¿¡¼­´Â Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Å« ¿ÀÂ÷¸¦ º¸¿´´Ù.

°á·Ð: ÀÓÇöõÆ® ½Ä¸³ °¢µµ¿¡¼­´Â °èȹµÈ ÀÓÇöõÆ®¿Í ½Ä¸³µÈ ÀÓÇöõÆ®°£ Åë°èÀû Â÷ÀÌ´Â ¾ø¾úÀ¸³ª platform°ú apex ºÎÀ§¿¡¼­ÀÇ ½Ä¸³ °Å¸®´Â Á¦2´ë±¸Ä¡ ºÎÀ§ÀÇ ÀÓÇöõÆ®¿¡¼­ ´õ Å« ¿ÀÂ÷¸¦ º¸¿´À¸¸ç Åë°èÀûÀ¸·Î À¯ÀÇÇÒ ¸¸ÇÑ Â÷À̸¦ º¸¿´´Ù.

Purpose: The purpose of this study is to compare the accuracy of the CT guided implant template that was produced by using an intraoral scanner according to the edentulous distance.

Materials and methods: Five maxillary casts were fabricated using radiopaque acrylic resin with the second premolars, first molars, and second molars missing. Then a virtual cast was acquired by scanning each resin cast. Implant treatment was planned on the missing sites by superimposing the presurgical CT DICOM file and the virtual cast. Then the implants were placed using a surgical template followed by postsurgical CT scan. The distance and angle of the platform and apex between the presurgical implant and postsurgical implant were measured using the X, Y, and Z axis of the superimposed presurgical CT and postsurgical CT via software followed by statistical analysis using Kruskall-Wallis test and Mann-Whitney test.

Results: The implant placement angle error increased towards the second molars but there was no statistically significant difference. The implant placement distance error at the platform and apex also increased towards the second molars and there was a statistically significant error at the second molars.

Conclusion: Although the placement angle had no statistically significant difference between the presurgical implant and postsurgical implant, the placement distance at the platform and apex showed a larger error and a statistically significant difference at the second molar implant.

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µðÁöÅÐ ½ºÄµ ; °¡ÀÌµå ¼ö¼ú
CAD/CAM ; Digital scan ; Guided surgery

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