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Removal torque of a two-piece zirconia abutment with a novel titanium component in an internal connection implant system after dynamic cyclic loading

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ÀÌÁÖÈñ ( Lee Joo-Hee ) - ¿ï»ê´ëÇб³ ÀÇ°ú´ëÇÐ ¼­¿ï¾Æ»êº´¿ø Ä¡°úº¸Ã¶°ú

Abstract

¸ñÀû: ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº »õ·Î¿î ŸÀÌŸ´½ ±¸¼º¿ä¼Ò¸¦ °¡Áø Áö¸£ÄÚ´Ï¾Æ Áö´ëÁÖÀÇ ³ª»ç Á¦°Å·ÂÀÇ º¯È­¿¡ ´ëÇØ ¾Ë¾Æº¸´Â °ÍÀÌ´Ù. ³»ºÎ¿¬°á ÀÓÇöõÆ®¸¦ À§ÇÑ »õ·Î¿î Áö¸£ÄÚ´Ï¾Æ Áö´ëÁÖÀÇ µ¿ÀûÇÏÁß ÈÄ Áö´ëÁÖ ³ª»çÀÇ Á¦°Å·ÂÀ» ±âÁ¸ÀÇ Å¸ÀÌŸ´½ Áö´ëÁÖ¿Í ºñ±³ÇÏ¿© ºÐ¼®ÇÏ¿´´Ù.

Àç·á ¹× ¹æ¹ý:³»Ãø¿¬°á ÀÓÇöõÆ®¿Í ŸÀÌŸ´½ Áö´ëÁÖ, ŸÀÌŸ´½ ±¸¼º¿ä¼Ò¸¦ °¡Áø Áö¸£ÄÚ´Ï¾Æ Áö´ëÁÖ¸¦ ÁغñÇÏ¿´´Ù. 12°³ÀÇ ³»ºÎ¿¬°áÇü ÀÓÇöõÆ®¿¡ 6°³ÀÇ Å¸ÀÌŸ´½ Áö´ëÁÖ¸¦ ¿¬°áÇÏ°í(´ëÁ¶±º), 6°³ÀÇ Å¸ÀÌŸ´½ ±¸¼º¿ä¼Ò¸¦ °¡Áø Áö¸£ÄÚ´Ï¾Æ Áö´ëÁÖ(½ÇÇ豺)¸¦ 30 NcmÀÇ ÅäÅ©·Î ¿¬°áÇÑ ÈÄ µ¿ÀûÇÏÁß ÀüÈÄÀÇ ³ª»ç Á¦°Å·ÂÀ» ÃøÁ¤ÇÏ¿´´Ù. µ¿Àû ¸¸´ÉÀç·á½ÃÇè±â¸¦ »ç¿ëÇÏ¿© ¿¬°áüÀÇ ÀåÃà°ú 30µµ °¢µµ¸¦ ÀÌ·çµµ·Ï ÇÏ°í 300 N ÇÏÁßÅ©±â·Î 100¸¸¹øÀÇ ÇÏÁßÀÌ °¡ÇØÁ³´Ù. µ¿ÀûÇÏÁß ÀüÈÄÀÇ Áö´ëÁÖ ³ª»ç Á¦°Å·ÂÀ» t°ËÁ¤À» ÅëÇØ ½Å·Ú±¸°£ 95%·Î Åë°èÀû À¯ÀǼºÀ» °ËÁõÇÏ¿´´Ù.

°á°ú: µÎ ±×·ì ¸ðµÎ¿¡¼­ µ¿ÀûÇÏÁß ÈÄ ³ª»ç Ç®¸²À» º¸ÀÌÁö ¾Ê¾Ò´Ù. µ¿Àû ÇÏÁß ÀüÈÄÀÇ ³ª»ç Á¦°Å·ÂÀº µÎ ±×·ì ¸ðµÎ¿¡¼­ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ°Ô ³ªÅ¸³µ´Ù(P < .05). µ¿Àû ÇÏÁß ÀüÈÄÀÇ ³ª»ç Á¦°Å·Â Â÷ÀÌ´Â ´ëÁ¶±º¿¡¼­ -7.25 ¡¾ 1.50 Ncm, ½ÇÇ豺¿¡¼­ -7.33 ¡¾ 0.93 Ncm ·Î ³ªÅ¸³µ´Ù. Åë°èºÐ¼® °á°ú µÎ ±º°£¿¡ ³ª»ç Á¦°Å·Â Â÷ÀÌ¿¡¼­´Â À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù(P > .05).

°á·Ð:ÀÌ ½ÇÇèÀÇ °á°ú¿¡ ÇÑÇÏ¿© ŸÀÌŸ´½ ±¸¼º¿ä¼Ò¸¦ »ç¿ëÇÑ Áö¸£ÄÚ´Ï¾Æ Áö´ëÁÖÀÇ µ¿ÀûÇÏÁß ÈÄ Áö´ëÁÖ ³ª»ç Á¦°Å·ÂÀÇ º¯È­´Â ŸÀÌŸ´½ Áö´ëÁÖ¿Í Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.

PURPOSE: The aim of this study was to evaluate screw removal torque of the two-piece zirconia abutment with the novel titanium component compared to the conventional onepiece titanium abutment in the internal connection implant before and after dynamic cyclic loading.

MATERIALS AND METHODS: Two types of the abutment assemblies with internal connection were prepared and divided into the groups; titanium abutment-titanium abutment screw assemblies as control, and zirconia abutment-titanium socket-titanium abutment screw assemblies as experimental group. A total of 12 abutments and implants were used of six assemblies each group. Each assembly was tightened to 30 Ncm. A cyclic load of 300 N at an angle of 30 degrees in reference to the loading axis was applied until one million cycles or failure. The removal torque values (RTVs) of the abutment screws were measured with a digital torque gauge before and after cyclic loading. The RTVs of the pre load and post load were analyzed with t-test, and P-values < .05 were considered statistically significant.

RESULTS: The assemblies of both groups survived all after the dynamic cyclic loading test without screw loosening. The statistically significant differences were found between the mean RTVs before and after the cyclic loading in both groups (P < .05). The RTV differences for the control and the experimental group were -7.25 ¡¾ 1.50 Ncm and -7.33 ¡¾ 0.93 Ncm, respectively. Statistical analysis revealed that the RTV differences in both groups were not significantly different from each other (P > .05).

CONCLUSION: Within the limitation of this study, the two-piece zirconia abutment with the titanium component did not show a significant RTV difference of the abutment screw compared to the titanium abutment after dynamic cyclic loading.

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Abutment screw; Dynamic loading; Zirconia; Titanium; Removal torque

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