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A comparative study on the accuracy of impression body according to the types of impression tray

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ÀÌÇöÁ¤ ( Yi Hyun-Jung ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
ÀÓÁ¾È­ ( Lim Jong-Hwa ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
ÀÌÁؼ® ( Lee Joon-Seok ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç

Abstract

¿¬±¸¸ñÀû : º¸ÆíÈ­µÈ ÀÓÇöõÆ® Ä¡·áÀÇ Àå±âÀûÀÎ ¼º°øÀ» À§Çؼ­´Â ÀÓÇöõÆ®¿Í »óºÎ º¸Ã¶¹°ÀÇ ¿¬°á ½Ã ¿ÏÀüÇÑ ¼öµ¿Àû ÀûÇÕÀ» ÀÌ·ç´Â °ÍÀÌ Áß¿äÇϸç, À̸¦ À§Çؼ­´Â Á¤È®ÇÏ°Ô Àλó äµæÇÏ´Â °ÍÀÌ ÇÊ¿äÇÏ´Ù. ÀÌ ¿¬±¸¿¡¼­´Â ÀÓÇöõÆ® °íÁ¤Ã¼ ¼öÁØ Àλó äµæ ¹æ¹ý Áß Àλóü Á¦°Å ÈÄ Àλó¿ë ÄÚÇÎÀÌ Àλóü¿¡ ³²¾ÆÀÖ´Â open tray Àλó¹ý°ú ±¸°­ ³»¿¡ ³²¾ÆÀÖ´Âclosed tray Àλó¹ý, ±×¸®°í Àλó äµæ ½Ã »ç¿ëµÉ ¼ö ÀÖ´Â ¿©·¯ Æ®·¹ÀÌ¿¡ ´ëÇØ ºñ±³ ¿¬±¸ÇØ º¸°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: ½ÇÇè ¸ðÇüÀº ÇÏ¾Ç ¾Ç±Ã ÇüÅ·Π¿­ÁßÇÕÇü ¾ÆÅ©¸±¸¯ ·¹ÁøÀ» ÀÌ¿ëÇÏ¿© Á¦ÀÛÇÏ¿´°í, vertical gapÀ» °üÂûÇÒ 20 mm °£°ÝÀÇ ±âÁØ ±¸Á¶¹°À» Á¦ÀÛÇÑ ÈÄ À̸¦ ÀÌ¿ëÇÏ¿© ½ÇÇè ¸ðÇü¿¡ ÀÓÇöõÆ® À¯»çü¸¦ ¸Å¸ôÇÏ¿´´Ù. ½ÇÇ豺Àº Æ®·¹ÀÌ ·¹ÁøÀ¸·Î Á¦ÀÛÇÑ °³ÀÎ Æ®·¹ÀÌ, Æú¸®Ä«º¸³×ÀÌÆ® ±â¼º Æ®·¹ÀÌ ±×¸®°í ±Ý¼Ó ±â¼º Æ®·¹ÀÌ µîÀÇ 3°¡Áö Æ®·¹À̸¦ ÀÌ¿ëÇÏ¿´°í, closed tray Àλó¹ý°ú open tray Àλó¹ýÀÇ 2°¡Áö Àλó äµæ¹ý¿¡ µû¶ó 5°³ ±ºÀ¸·Î ³ª´©¾ú´Ù. ±×¸®°í À§Ä¡¿¡ µû¸¥ ¿ÀÂ÷¸¦ °üÂûÇϱâ À§ÇØ ½ÃÆí ¸ðÇüÀ» ÀüÄ¡ºÎ, ±¸Ä¡ºÎ·Î ´Ù½Ã ³ª´©¾î ÃÑ 10°³ÀÇ ½ÇÇ豺À» ±¸¼ºÇÏ¿´´Ù. 1±º´ç ÃÑ 9°³ÀÇ ½ÃÆíÀ» Á¦ÀÛÇÏ¿´°í, ½ÃÆí¿¡ ±âÁØ ±¸Á¶¹°À» ÇÑ ÂÊ Áö´ëÁÖ¸¸ 20 NcmÀ¸·Î °íÁ¤½ÃŲ ÈÄ °üÂûÇÏ´Â 1-screw test¸¦ ÀÌ¿ëÇÏ¿© ¹Ý´ëÂÊÀÇ ÀÓÇöõÆ® À¯»çü¿Í Áö´ëÁÖ¿ÍÀÇ gapÀ» ÀÔü ±¤ÇÐ Çö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© °üÂûÇÏ¿´´Ù. 1½ÃÆí´çÃÑ6ºÎÀ§¸¦ ÃøÁ¤ÇÏ¿´°í, 3ȸ¾¿ ÃøÁ¤ÇÏ¿© µ¿ÀÏÇÑ °á°ú¸¦ ¾ò¾úÀ» ¶§ ¼öÄ¡¸¦ ±â·ÏÇÏ¿© Åë°è ó¸®ÇÏ¿´´Ù.

°á°ú : Closed tray Àλó¹ý »ç¿ë ½Ã Æú¸®Ä«º¸³×ÀÌÆ® ±â¼º Æ®·¹ÀÌ¿Í °³ÀÎ Æ®·¹ÀÌ °£¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´Áö¸¸, open tray Àλó¹ý »ç¿ë ½Ã Æú¸®Ä«º¸³×ÀÌÆ® ±â¼º Æ®·¹ÀÌ¿Í °³ÀÎ Æ®·¹ÀÌ °£¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù. Æú¸®Ä«º¸³×ÀÌÆ® ±â¼º Æ®·¹À̸¦ ÀÌ¿ëÇÑ Àλó äµæ ½Ã open tray Àλó¹ý°ú closed tray Àλó¹ý °£¿¡ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´°í (P < .05), Æú¸®Ä«º¸³×ÀÌÆ® Æ®·¹À̸¦ ÀÌ¿ëÇÑ closed tray Àλó¹ýÀ» °³ÀÎ Æ®·¹À̸¦ ÀÌ¿ëÇÑ open tray Àλó¹ý°ú ºñ±³ ½Ã ÀüÄ¡ºÎ, ±¸Ä¡ºÎ ¸ðµÎ¿¡¼­ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù (P< .05).

°á·Ð : Æú¸®Ä«º¸³×ÀÌÆ® ±â¼º Æ®·¹À̸¦ »ç¿ë ½Ã¿¡´Â open tray Àλó¹ýÀÌ ´õ ÃßõµÇ´Â ¹ÙÀ̸ç, »ýü ¿Ü ½ÇÇèÀÇ ÇѰ輺¿¡ À¯ÀÇÇØ¾ß Çϸç, Á¤È®ÇÑ ÀÓÇöõÆ® °íÁ¤Ã¼ ¼öÁØ Àλó äµæ¿¡ ´ëÇØ ´õ ¸¹Àº ¿¬±¸°¡ ÇÊ¿äÇÏ´Ù°í »ç·áµÈ´Ù.

Purpose: The objective of this study was to evaluate and compare the accuracy of impression body taking by the closed and the open tray impression technique with 3 types of impression tray. Individual tray, metal stock tray and polycarbonate tray were used.

Materials and Methods : Nine closed tray impressions were taken by individual tray, metal stock tray and polycarbonate stock tray, respectively with polyether impression material. 9 open tray impressions were also acquired by same manner. Precision analysis on the master models was performed by attaching the reference frameworks with alternate single screws and measuring the vertical fit discrepancy of respective analogues in working cast with a stereo microscope. Data were analyzed by 1 way ANOVA and independent t-test.

Results: The average fit accuracy of impression bodies was calculated. With the closed tray impression technique, there were significant statistical differences in vertical fit discrepancy according to the types of tray. The individual tray group showed the lowest value and the polycarbonate stock tray group represented the highest. With the open tray impression technique, there was no significant difference in vertical fit discrepancy. Significant statistical difference in vertical fit discrepancy was found between the open and the closed impression technique with the polycarbonate stock tray.

Conclusion: From the results above, more precise impressions could be acquired by the rigid individual tray compared with the polycarbonate stock tray. It was hard to get consistent accuracy impressions by the closed tray impression technique with polycarbonate stock trays.

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Àλó äµæ¹ý;ÀÓÇöõÆ®
Dental impression technique;Implants

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