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Influence of internal connection length on screw loosening in internal connection implants

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±èÁö¼± ( Kim Ji-Sun ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
¹Ú¿µ¹ü ( Park Young-Bum ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
ÃÖÇö¹Î ( Choi Hyun-Min ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
±è¼ºÅ ( Kim Sung-Tae ) - ¼­¿ï´ëÇб³ Ä¡°ú´ëÇÐ Ä¡ÁÖ°úÇб³½Ç
±èÇöö ( Kim Hyeon-Cheol ) - ºÎ»ê´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
±è¼±Àç ( Kim Sun-Jai ) - ¿¬¼¼´ëÇб³ °­³²¼¼ºê¶õ½ºº´¿ø Ä¡°úº¸Ã¶°ú
¹®È«¼® ( Moon Hong-Seok ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
ÀÌÀçÈÆ ( Lee Jae-Hoon ) - ¿¬¼¼´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç

Abstract

¸ñÀû: º» ¿¬±¸¿¡¼­´Â long internal connection ÇüÅÂÀÇ ÀÓÇöõÆ® Áö´ëÁÖ¸¦ ³»ºÎ ¿¬°á ±æÀÌ¿¡ º¯È­¸¦ ÁÖ¾î ÀÓÇöõÆ®-Áö´ëÁÖ °áÇÕºÎÀÇ ¾ÈÁ¤¼ºÀ» ºñ±³ Æò°¡ÇØ º¸°íÀÚ ÇÏ¿´´Ù.

Àç·á ¹× ¹æ¹ý: Long internal connectionÀÇ ÀÓÇöõÆ®(Replus system, 4.7 ¡¿ 11.5 mm)¸¦ °¢°¢ Áö´ëÁÖÀÇ ±æÀÌ¿¡ µû¶ó 4°³ÀÇ ±º(1, 2, 3, 4 mm ±º)À¸·Î ³ª´©¾ú°í ÃÑ 20°³ÀÇ ½ÃÆíÀ» »ç¿ëÇÏ¿´´Ù. ½ÃÆíÀ» ·¹Áø¿¡ ¸Å¸ôÇÏ¿© °íÁ¤½ÃÅ°°í 100 NÀÇ ÈûÀ¸·Î ÀÓÇöõÆ® ÀåÃà¿¡ ´ëÇØ 30µµÀÇ °¢µµ¿¡¼­ 1.0 ¡¿ 106 ¹øÀÇ ¹Ýº¹ÇÏÁßÀ» °¡ÇÑ ÈÄ ÇÏÁß Àü ÈÄÀÇ Ç®¸²È¸Àü·ÂÀÇ Â÷À̸¦ °è»êÇÏ¿© 95% À¯ÀǼöÁØ¿¡¼­ Kruskal-Wallis °ËÁ¤ ¹æ¹ýÀ» ÅëÇØ Åë°è ºÐ¼®ÇÏ¿´´Ù.

°á°ú: Áö´ëÁÖ ³»ºÎ ±æÀÌ¿¡ µû¸¥ Ç®¸² ȸÀü·ÂÀÇ Åë°èÀû À¯ÀǼºÀº ³ªÅ¸³ªÁö ¾Ê¾ÒÀ¸¸ç (P > .05) ¾î¶² ½ÃÆí¿¡¼­µµ ¿ÏÀüÇÑ ³ª»ç Ç®¸²À̳ª ³ª»ç ÆÄÀýÀº °üÂûµÇÁö ¾Ê¾Ò´Ù.

°á·Ð: ³»Ãø ¿¬°á ÀÓÇöõÆ®¿¡¼­ Áö´ëÁÖ ³»ºÎ±æÀÌ¿¡ µû¸¥ ³ª»ç Ç®¸²ÀÇ Á¤µµ´Â Â÷ÀÌ°¡ ³ªÁö ¾Ê¾Ò´Ù.

PURPOSE. The purpose of this study was to evaluate whether the internal abutment length affected screw stability in an internal connection implant.

MATERIALS AND METHODS. Twenty long internal connection implants (Replus system, 4.7 ¡¿ 11.5 mm) were selected for this investigation. Abutments were assigned to four groups depending on the length of the internal connection (abutments with internal lengths of 1, 2, 3, and 4 mm, respectively). Each implant fixture specimen was embedded in resin medium and connected to an abutment with an abutment screw. A load of 100 N, applied at an angle of 30 to the long axis of the implant, was repeated for 1.0 ¡¿ 106 cycles. Reverse torque values (RTV) were recorded before and after loading, and the change in RTV was calculated. Data were analyzed with the Kruskal-Wallis test.

RESULTS. The change in RTV was not significantly different among the groups (P>.05). Screw loosening and fractures were not observed in any groups, and joint stability was maintained.

CONCLUSION. The internal length of the abutment may not significantly affect the degree of screw loosening.

Å°¿öµå

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Screw loosening; Reverse torque; Internal connection implant; Internal connection length

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