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Effect of cyclic loading on axial displacement of abutment into implant with internal tapered connection: a pilot study

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¼³Çö¿ì ( Seol Hyon-Woo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
Ç㼺ÁÖ ( Heo Seong-Joo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
°ûÀ翵 ( Koak Jai-Young ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
±è¼º±Õ ( Kim Seong-Kyun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇдëÇпø Ä¡°úº¸Ã¶Çб³½Ç
ÇÑÁ¾Çö ( Han Chong-Hyun ) - ¿¬¼¼´ëÇб³ °­³²¼¼ºê¶õ½ºº´¿ø Ä¡°úº¸Ã¶°ú

Abstract

¿¬±¸ ¸ñÀû: ³»Ãø¿¬°áÇü ÀÓÇöõÆ®¿Í Áö´ëÁÖÀÇ ¿¬°áü¿¡ ¹Ýº¹ÇÏÁßÀ» ºÎ¿©ÇÏ¿´À» ¶§ ¼öÁ÷ ħÇϸ¦ Æò°¡ÇÏ°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: ¿ÜÃø¿¬°áÇü ÀÓÇöõÆ®¿Í ³»Ãø¿¬°áÇü ÀÓÇöõÆ®¿¡ ¼¼ Á¾·ùÀÇ ½Ã¸àÆ®À¯ÁöÇü Áö´ëÁÖ¸¦ °¢°¢ ÀåÂøÇÏ¿´´Ù. Áï, ¿ÜÃø¿¬°áÇü Áö´ëÁÖ(Ext ±×·ì), ³»Ãø¿¬°áÇü 1-piece Áö´ëÁÖ(Int-1 ±×·ì), ³»Ãø¿¬°áÇü 2-piece Áö´ëÁÖ(Int-2 ±×·ì)¸¦ »ç¿ëÇÏ¿´À¸¸ç, °¢ ±×·ì¸¶´Ù 7°³ÀÇ ½ÃÆíÀ» ÁغñÇÏ¿´´Ù. ÀÓÇöõÆ®-Áö´ëÁÖ ¿¬°áü¿¡ ¼öÁ÷ÇÏÁßÀ» Àû¿ëÇϱâ À§ÇÏ¿© ÀÓÇöõÆ® ¹Þħ´ë¿¡ °íÁ¤ÇÑ ÈÄ, 4 HzÀÇ ºóµµ·Î 150 ¡¾ 10 NÀÇ ¹Ýº¹ÇÏÁßÀ» °¡ÇÏ¿´´Ù. ¼öÁ÷ħÇÏ·®Àº 0, 5, 10, 50, 100, 1,000, 5,000, 10,000ȸÀÇ ¹Ýº¹ÇÏÁß ÈÄ¿¡ °¢°¢ ÃøÁ¤ÇÏ¿´´Ù. ¹Ýº¹ÃøÁ¤ºÐ»êºÐ¼®(RM-ANOVA)¸¦ ÀÌ¿ëÇÏ¿© ¹Ýº¹ÇÏÁßÀÇ ¿µÇâÀ» ºÐ¼®ÇÏ¿´À¸¸ç, ÆÐÅϺ¯È­¸¦ °üÂûÇϱâ À§ÇÏ¿© ¼±ÇüÈ¥ÇÕ¸ðÇü(linear mixed model)À» »ç¿ëÇÏ¿´´Ù. À¯ÀǼöÁØÀº 5%·Î ¼³Á¤ÇÏ¿´´Ù.

°á°ú:10,000ȸ ¹Ýº¹ÇÏÁß ÈÄ ¼öÁ÷ħÇÏ·®Àº, Ext ±×·ì¿¡¼­ 0.714 ¡¾ 0.488 §­, Int-1±×·ì¿¡¼­ 5.286 ¡¾ 1.604 §­, Int-2 ±×·ì¿¡¼­ 11.429 ¡¾ 1.902 §­¸¦ ³ªÅ¸³»¾ú´Ù. ÆÐÅϺм®¿¡¼­´Â, Int-1 ±×·ì ¹× Int-2 ±×·ì¿¡¼­ Áö¼ÓÀûÀÎ ¼öÁ÷ħÇÏ°¡ °üÂûµÇ¾úÀ¸¸ç, Ext±×·ì¿¡¼­´Â ¼öÁ÷ħÇÏÇö»óÀÌ °üÂûµÇÁö ¾Ê¾Ò´Ù.

°á·Ð: 10,000ȸ ¹Ýº¹ÇÏÁß ÈÄÀÇ ¼±ÇüÈ¥ÇÕ¸ðÇüÀ» ÅëÇÑ ºÐ¼®¿¡¼­, Ext±×·ìÀº ¼öÁ÷ħÇÏÇö»óÀ» º¸ÀÌÁö ¾Ê¾ÒÀ¸³ª, Int-1 ¹× Int-2 ±×·ìÀº Áö¼ÓÀûÀÎ ¼öÁ÷ħÇÏÇö»óÀ» ³ªÅ¸³»¾ú´Ù. ¶ÇÇÑ, Int-2±×·ì¿¡¼­ Int-1±×·ìº¸´Ù ´õ ¸¹Àº ¼öÁ÷ħÇÏ·®ÀÌ °üÂûµÇ¾ú´Ù.

PURPOSE: To evaluate the axial displacement of implant-abutment assembly after cyclic loading in internal tapered connection system.

MATERIALS AND METHODS: External butt-joint connection implant and internal tapered connection implant were connected with three types of abutment for cement-retained prostheses, i.e. external type abutment (Ext group), internal tapered 1-piece abutment (Int-1 group), and internal tapered 2-piece abutment (Int-2 group). For each group, 7 implants and abutments were used. The implantabutments assemblies were clamped into the implant holder for vertical loads. A dynamic cyclic loading was applied for 150 ¡¾ 10 N at a frequency of 4 Hz. The amount of axial displacement of the abutment into the implant was calculated at each cycle of 0, 5, 10, 50, 100, 1,000, 5,000, and 10,000. A repeated measures analysis of variance (ANOVA) for the overall effect of cyclic loading and the pattern analysis by linear mixed model were used for statistical analysis. Differences at P<.05 were considered statistically significant.

RESULTS: The mean axial displacement after 10,000 cycles were 0.714 ¡¾ 0.488 §­ in Ext group, 5.286 ¡¾ 1.604 §­ in Int-1 group, and 11.429 ¡¾ 1.902 §­ in Int-2 group. In the pattern analysis, Int-1 and Int-2 group showed continuous axial displacement at 10,000 cycles. There was no declining pattern of axial displacement in the Ext group.

CONCLUSION: The pattern of linear mixed model in Ext group showed no axial displacement. There were continuous axial displacements in abutment-implant assemblies in the Int-1 and Int-2 group at 10,000 cycles. More axial displacement was found in Int-2 group than in Int-1 group.

Å°¿öµå

ÀÓÇöõÆ®-Áö´ëÁÖ µðÀÚÀÎ ³»Ãø¿¬°á±¸Á¶ ¹Ýº¹ÇÏÁß ¼öÁ÷ħÇÏ Ä§ÇÏÇö»ó
Dental implant-abutment design; Internal tapered connection; Cyclic loading; Axial displacement; Settling effect

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