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The effect of screw tightening techniques on the detorque value in internal connection implant superstructure

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Abstract

¿¬±¸ ¸ñÀû: º» ¿¬±¸´Â Àß ¸Â´Â ÀÓÇöõÆ® »óºÎ±¸Á¶¹°¿¡¼­ ¼­·Î ´Ù¸¥ ³ª»çÁ¶ÀÓ¼ø¼­¿Í Á¶ÀÓ¹æ¹ýÀÌ ³ª»çÀÇ Ç®¸²ÅäÅ©°ª¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡ÇÏ¿´´Ù.

¿¬±¸Àç·á ¹× ¹æ¹ý:¼­·Î ¼öµ¿Àû ÀûÇÕ °ü°è¸¦ °®´Â ¿ÏÀü ¹«Ä¡¾Ç ÇÏ¾Ç ÁÖ¸ðÇü°ú ³× °³ÀÇ ÆòÇàÇÑ ÀÓÇöõÆ® (Astra Tech)¿¡ Á÷Á¢ ¿¬°áµÇ´Â ±Ý¼Ó±¸Á¶¹°À» Á¦ÀÛÇÏ¿´´Ù. ±Ý¼Ó±¸Á¶¹°°ú Àß ¸Â´Â ½ÇÇè¸ðÇüÀ» À§ÇØ ÁÖ¸ðÇü¿¡¼­ ¿¬°áÀλó¹ýÀ» ÀÌ¿ëÇÏ¿© ¿©¼¸ °³ÀÇ °æ¼®°í ¸ðÇüÀ» ¾ò¾ú´Ù. 20 Ncm·Î Á¶ÀÎ ÈÄ ³ª»çÀÇ Ç®¸²ÅäÅ©°ªÀ» µÎ ¹ø ÃøÁ¤ÇÏ¿´´Ù. ¼¼ °¡Áö ³ª»çÁ¶ÀÓ¼ø¼­ (1-2-3-4, 2-4-3-1, ±×¸®°í 2-3-1-4)¿Í µÎ °¡Áö ³ª»çÁ¶ÀÓ¹æ¹ý (two-step°ú one-step)¿¡ ´ëÇÑ ³ª»çÀÇ Ç®¸²ÅäÅ©°ª°ú ÃÖ¼ÒÇ®¸²ÅäÅ©°ªÀ» À¯ÀǼöÁØ .05¿¡¼­ °¢°¢ ´Ù¿øºÐ»êºÐ¼®¹ý (multi-way ANOVA)°ú ÀÌ¿øºÐ»êºÐ¼®¹ý (two-way ANOVA)À» ÀÌ¿ëÇÏ¿© Åë°èºÐ¼® ÇÏ¿´´Ù.

°á°ú: ³ª»çÁ¶ÀÓ¼ø¼­¿¡ ´ëÇÑ ³ª»çÀÇ Æò±Õ Ç®¸²ÅäÅ©°ªÀº 12.8 Ncm (2-4-3-1)¿¡¼­ 13.1 Ncm (2-3-1-4)ÀÇ °ªÀ» º¸¿´°í, ³ª»çÁ¶ÀÓ¹æ¹ý¿¡ ´ëÇÑ °ªÀº 13.1 Ncm (two-step)¿Í 11.8 Ncm(one-step)¿´´Ù. ³ª»çÁ¶ÀÓ¼ø¼­¿¡ ´ëÇÑ ³ª»çÀÇ Æò±Õ ÃÖ¼ÒÇ®¸²ÅäÅ©°ªÀº 11.1 Ncm (1-2-3-4)¿Í 11.2 Ncm (2-4-3-1°ú 2-3-1-4)¿´°í, ³ª»çÁ¶ÀÓ¹æ¹ý¿¡ ´ëÇÑ °ªÀº 11.2 Ncm (two-step)¿Í 9.9 Ncm (one-step)¿´´Ù. ³ª»çÀÇ Ç®¸²ÅäÅ©°ª°ú ÃÖ¼ÒÇ®¸²ÅäÅ©°ªÀº ¼¼ °¡Áö ³ª»çÁ¶ÀÓ¼ø¼­ °£¿¡ Åë°èÇÐÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù. ±×·¯³ª µÎ °¡Áö ³ª»çÁ¶ÀÓ¹æ¹ý °£¿¡´Â µÎ °ª ¸ðµÎ Åë°èÇÐÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ ÀÖ¾ú´Ù. ³ª»ç¸¦ µÎ ´Ü°è·Î ³ª´©¾î Á¶ÀÌ´Â ¹æ¹ýÀÌ ÇÑ ¹ø¿¡ Á¶ÀÌ´Â ¹æ¹ýº¸´Ù ´õ Å« Ç®¸²ÅäÅ©°ª (P = .0003)°ú ´õ Å« ÃÖ¼ÒÇ®¸²ÅäÅ©°ª (P= .0035)À» º¸¿´´Ù.

°á·Ð: º» ¿¬±¸¿Í °°Àº Á¶°ÇÇÏ¿¡¼­, ¿¬°áÀλó¹ýÀ¸·Î ¾òÀº Àß ¸Â´Â ÀÓÇöõÆ® »óºÎ±¸Á¶¹°¿¡ À־ ³ª»çÁ¶ÀÓ¼ø¼­´Â ³ª»çÀÇ Ç®¸²ÅäÅ©°ª¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â Áß¿äÇÑ ¿ä¼Ò´Â ¾Æ´Ï¾ú´Ù. ±×·¯³ª ³ª»ç¸¦ µÎ ´Ü°è·Î ³ª´©¾î Á¶ÀÌ´Â ¹æ¹ýÀº ÇÑ ¹ø¿¡ Á¶ÀÌ´Â ¹æ¹ýº¸´Ù ´õ Å« Ç®¸²ÅäÅ©°ªÀ» º¸¿´´Ù.

Purpose: This study evaluated the effect of different screw tightening sequences and methods on detorque values in a well-fitting implant superstructure.

Material and Methods : A fully edentulous mandibular master model and a metal framework directly connected to four parallel implants (Astra Tech) with a passive fit to each other were fabricated. Six stone casts were made with a splinted impression technique to represent a ¡¯well-fitting¡¯ situation with the metal framework. Detorque values were measured twice after screw tightening using 20 Ncm. Detorque values and minimum detorque values for three screw tightening sequences (1-2-3-4, 2-4-3-1, and 2-3-1-4) and for two tightening methods (two-step and one-step) were analyzed using multi-way analysis of variance and two-way analysis of variance, respectively, at a .05 level of significance.

Results: The mean detorque values for screw tightening sequences ranged from 12.8 Ncm (2-4-3-1) to 13.1 Ncm (2-3-1-4), and for screw tightening methods were 13.1 Ncm (two-step) and 11.8 Ncm (one-step). The mean of mimimum detorque values for screw tightening sequences were 11.1 Ncm (1-2-3-4) and 11.2 Ncm (2-4-3-1 and 2-3-1-4), and for screw tightening methods were 11.2 Ncm (two-step) and 9.9 Ncm (one-step). No statistically significant differences among three screw tightening sequences were found for detorque values and for mimimum detorque values. But, statistically significant differences between two screw tightening methods were found for two values. Two-step screw tightening method showed higher detorque value (P = .0003) and higher minimum detorque value (P = .0035) than one-step method.

Conclusion: Within the limitations of this study, the screw tightening sequence was not a critical factor for the detorque values in a well-fitting implant superstructure by the splinted impression technique. But, two-step screw tightening method showed greater detorque values than one-step method.

Å°¿öµå

³ª»çÁ¶ÀÓ¼ø¼­; ³ª»çÁ¶ÀÓ¹æ¹ý; Ç®¸²ÅäÅ©°ª; ¿¬°áÀλó¹ý; ³»ºÎ¿¬°á ÀÓÇöõÆ®
Screw tightening sequence; Screw tightening method; Detorque value; Splinted impression technique; Internal-connection dental implant

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