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Implant stability evaluation according to the bone condition, fixture diameter and shape in the osseointegration simulated resin model

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±ÇÅð¡ ( Kwon Taek-Ka ) - °¡Å縯´ëÇб³ Ä¡°úº¸Ã¶Çб³½Ç
¿©Àμº ( Yeo In-Sung ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±è¼ºÈÆ ( Kim Sung-Hun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
ÇÑÁß¼® ( Han Jung-Suk ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
ÀÌÀçºÀ ( Lee Jai-Bong ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
¾çÀçÈ£ ( Yang Jae-Ho ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¿¬±¸ ¸ñÀû: ÀÚ±â°ø¸íÁÖÆļö ºÐ¼®, Æ丮¿ÀÅ×½ºÆ®, Ç®¸² ÅäÅ©´Â ÀÓÇöõÆ®ÀÇ ¾ÈÁ¤¼ºÀ» ÃøÁ¤Çϱâ À§ÇÑ ¹æ¹ýÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ÀÌ ¹æ¹ýµéÀº °ñ »óÅÂ¿Í ÀÓÇöõÆ® ÇüÅ¿¡ ¿µÇâÀ» ¹Þ´Â´Ù. º» ¿¬±¸¿¡¼­´Â °ñÀ¯ÂøÀÌ ÀçÇöµÈ ¾ÆÅ©¸± ·¹Áø ½ÇÇè ¸ðµ¨¿¡¼­ ÀÓÇöõÆ®°¡ °áÇÕµÈ °ñÀÇ ¾çÀ» º¯È­ÇÏ°í °æºÎÀÇ °ñ »ó½Ç¾çÀÌ Áõ°¡ÇÏ¿´À» °æ¿ì, ÀÚ±â°ø¸íÁÖÆļö ºÐ¼®, Æ丮¿ÀÅ×½ºÆ®, Ç®¸² ÅäÅ© ÃøÁ¤¿¡ ¾î¶°ÇÑ ¿µÇâÀ» ÁÖ´ÂÁö ¾Ë¾Æº¸°í ÀÌµé »óÈ£°£ÀÇ °ü°è¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: °ñ À¯ÂøÀ» ÀçÇöÇϱâ À§ÇÏ¿© ÀÓÇöõÆ®¸¦ ¾Ë·ç¹Ì´½ Ʋ¿¡ ³ª»ç·Î °íÁ¤ÇÑ ÈÄ ÀÚ°¡ÁßÇÕÇü ¾ÆÅ©¸±¸¯ ·¹ÁøÀÇ °¡·ç¿Í ¿ë¾×À» Ʋ ¾È¿¡ ºÎ¾î¼­ ÁßÇÕÀ» ½ÃÄ×´Ù. ÀÓÇöõÆ®¿Í °áÇÕµÈ ·¹ÁøÀÇ µÎ²²¸¦ Á¶Á¤ÇÏ¿© °ñ °áÇÕ µÎ²²¸¦ °¢°¢ 1, 3, 5, 10 mmÀÎ °æ¿ì·Î ÀçÇöÇÏ¿´´Ù. ±× ÈÄ ÀÓÇöõÆ® ÁÖº¯ °æºÎ °ñ »ó½Ç ¾çÀÌ 1, 3, 5 mmÀÎ °æ¿ì¸¦ ÀçÇöÇÏ¿´´Ù. °¢°¢ÀÇ ÀçÇöµÈ °ñ Á¶°Ç¿¡¼­´Â 4 mm Á÷°æÀÇ Á÷¼±Çü ÀÓÇöõÆ®, °°Àº Á÷°æÀÇ tapered Çü ÀÓÇöõÆ®, 5 mm Á÷°æÀÇ tapered ÇüÀÇ 3°¡Áö ÀÓÇöõÆ®°¡ °¢°¢ 5°³¾¿ »ç¿ëµÇ¾ú´Ù. ¸ðµç °ñ Á¶°Ç¿¡¼­ ÀÚ±â°ø¸íÁÖÆļö ºÐ¼®°ú Æ丮¿ÀÅ×½ºÆ® ÃøÁ¤ÀÌ ÀÌ·ç¾îÁ³À¸¸ç °ñ °áÇÕ µÎ²² 1, 3 mm ½ÃÆí¿¡¼­´Â Ç®¸² ÅäÅ©°¡ ÃøÁ¤µÇ¾ú´Ù.

°á°ú: °ñ °áÇÕ µÎ²²°¡ Áõ°¡Çϰųª ÀÓÇöõÆ® Á÷°æÀÌ Áõ°¡ÇÒ¼ö·Ï Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ISQ °ªÀº Áõ°¡ÇÏ¿´°í, Æ丮¿ÀÅ×½ºÆ® °ªÀº °¨¼ÒÇÏ¿´´Ù (P<.001, P<.001). ÀÓÇöõÆ® °æºÎ¿¡ ÁÖÀ§ °ñ »ó½Ç ¾çÀÌ Ä¿Áú¼ö·Ï ISQ °ªÀº °¨¼ÒÇÏ¿´°í, Æ丮¿ÀÅ×½ºÆ® °ªÀº Áõ°¡ÇÏ¿´´Ù (P<.001). ISQ °ª°ú Æ丮¿ÀÅ×½ºÆ® t°ªÀº ¸Å¿ì °­ÇÑ »ó°ü°ü°è¸¦ ³ªÅ¸³Â´Ù (r = -0.99, P<.001). ISQ°ª°ú Ç®¸²ÅäÅ©´Â ¾àÇÑ »ó°ü°ü°è¸¦ ³ªÅ¸³ÂÀ¸¸ç (r = 0.52, P<.001), Æ丮¿ÀÅ×½ºÆ® °ª°ú Ç®¸² ÅäÅ©µµ ¾àÇÑ »ó°ü°ü°è¸¦ ³ªÅ¸³Â´Ù (r = -0.52, P<.001)

°á·Ð: ·¹ÁøÀ¸·Î ÀçÇöÇÑ °ñÀÇ ¾çÀÌ Áõ°¡ÇÒ¼ö·Ï, ÀÓÇöõÆ®ÀÇ Á÷°æÀÌ Áõ°¡ÇÒ¼ö·Ï, °æºÎÀÇ °ñ »ó½Ç¾çÀÌ ÀûÀ»¼ö·Ï ÀÓÇöõÆ® ¾ÈÁ¤¼ºÀÌ Áõ°¡ÇÔÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ º» ¿¬±¸¿¡¼­´Â ISQ °ª°ú Æ丮¿ÀÅ×½ºÆ® °ªÀÇ °­ÇÑ »ó°ü°ü°è¸¦ ¹àÈú ¼ö ÀÖ¾ú´Ù.

PURPOSE: Resonance frequency analysis, Periotest, and removal torque (RT) test were known as the methods to assess implant stability. The results of these methods are affected by the bone condition, implant diameter and shape. The purpose of this study is to access the meaning and the correlationship of the resonance frequency analysis, Periotest and RT test in osseointegration simulated acrylic resin when the engaged bone thickness and peri-implant bone defect are changed.

MATERIALS AND METHODS: To simulate osseointegration, the fixture was fixed to an aluminum mold with a screw. Acrylic resin powder and liquid were poured into the mold for polymerization. The engaged resin thickness with implant was controlled. Simulated cortical bone thicknesses were 1, 3, 5 and 10 mm. Additional 1, 3 and 5 mm peri-implant bone defects were simulated. Three types of implants were used; 4 mm diameter implants of straight shape, 4 mm diameter implants of tapered shape and 5 mm diameter implants of tapered shape. Five fixtures per each type were tested in respective bone condition. Resonance frequency analysis and Periotest were evaluated in all bone conditions. Peak removal torque was measured at simulated cortical bone thicknesses of 1 and 3 mm. The statistical analysis was performed with the Kruskal-Wallis test, Mann-Whitney U test, and Spearman test using a 95% level of confidence.

RESULTS: With increasing engaged bone depth, the Implant Stability Quotient (ISQ) values increased and the Periotest values (PTVs) decreased P<.001, P<.001). With increasing peri-implant bone defect, ISQ values decreased and PTVs increased (P<.001). When the diameter of implant increased, ISQ values increased and Periotest values (PTV) decreased (P<.001). There was a strong correlation between ISQ values and PTVs (r = -0.99, P<.001). Furthermore, the peak removal torque values had weak correlations with both ISQ values and PTVs (r = 0.52, P<.001 ; r = -0.52, P<.001).

CONCLUSION: This study confirmed favorable implant stability with increasing engaged bone depth and implant diameter and decreasing peri-implant bone defect. ISQ values and PTVs showed strong correlation with each other and not with the peak removal torque values.

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Implant stability; Resonance frequency analysis; Periotest; Removal torque

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