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Effect of mixing method and storage time on dimensional stability of alginate impressions materials

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¹æÇöÁö, ½ÉÇö¾Æ, Á¶¿µÀº, ¹ÚÀºÁø,
¼Ò¼Ó »ó¼¼Á¤º¸
¹æÇöÁö ( Bang Hyun-Ji ) - Ewha Womans University School of Medicine Department of Prosthodontics
½ÉÇö¾Æ ( Shim Hyun-Ah ) - Ewha Womans University Graduate School of Clinical Dentistry
Á¶¿µÀº ( Cho Young-Eun ) - Ewha Womans University School of Medicine Department of Prosthodontics
¹ÚÀºÁø ( Park Eun-Jin ) - Ewha Womans University School of Medicine Department of Prosthodontics

Abstract

¸ñÀû: ÀüÅëÀûÀÎ ¾ËÁö³×ÀÌÆ®¿Í üÀû ¾ÈÁ¤¼ºÀ» °³¼±ÇÑ µÎ Á¾·ùÀÇ extended-pour ¾ËÁö³×ÀÌÆ®¿¡¼­ È¥ÇÕ ¹æ¹ý°ú º¸°ü ½Ã°£¿¡ µû¸¥ üÀû ¾ÈÁ¤¼º Â÷À̸¦ Æò°¡ÇÏ°íÀÚ ÇÑ´Ù.

Àç·á ¹× ¹æ¹ý: ±Ý¼Ó ÁÖ¸ðÇüÀ» Á¦ÀÛÇÏ¿© ÇÑ Á¾·ùÀÇ ÀüÅëÀûÀÎ ¾ËÁö³×ÀÌÆ®¿Í µÎ Á¾·ùÀÇ extended-pour ¾ËÁö³×ÀÌÆ®·Î ±º ´ç 40°³ ¾¿(¼öµ¿ È¥ÇÕ 20°³, ÀÚµ¿ È¥ÇÕ 20°³) Àλó äµæ ÈÄ Áï½Ã, 2ÀÏ, 5ÀÏ, 6ÀÏ º¸°ü ±â°£¿¡ µû¶ó ±º´ç 5°³¾¿ÀÇ ¼®°í ¸ðÇü Á¦ÀÛÇÏ¿´°í, 3D Å×ÀÌºí ½ºÄ³³Ê·Î ¸ðµ¨ ½ºÄµ ÈÄ ½ºÄµ µ¥ÀÌÅ͸¦ ÁßøÇÏ¿© º¯È­·®À» ÃøÁ¤ÇÏ¿´´Ù. Åë°è ºÐ¼®À¸·Î ÀϹݼ±Çü¸ðÇüÀ» »ç¿ëÇÏ¿´°í TukeyÀÇ ¹æ¹ýÀ¸·Î »çÈÄ°ËÁ¤ ½ÃÇàÇÏ¿´´Ù (P < .001).

°á°ú: È¥ÇÕ ¹æ¹ý¿¡ µû¸¥ Á¤È®µµ¿¡¼­´Â Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú°í ¸ðµç ±º¿¡¼­ Áï½Ã ¼®°í ÁÖÀÔÇÑ °æ¿ì °¡Àå ÀûÀº ºÎÇÇ º¯È­¸¦ º¸¿´´Ù. 2ÀÏ º¸°ü ÈÄ ¼®°í ÁÖÀÔ ½Ã ±º °£¿¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ³ªÅ¸³µ°í, º¸°ü 5ÀÏ ÈÄ extended-pour ¾ËÁö³×ÀÌÆ®ÀÇ °æ¿ì ÀüÅëÀûÀÎ ¾ËÁö³×ÀÌÆ®¿¡ ºñÇØ ´õ ³ôÀº Á¤È®µµ¸¦ º¸¿´´Ù. ÀüÅëÀûÀÎ ¾ËÁö³×ÀÌÆ®´Â 2 ? 5ÀÏ¿¡¼­, extended pour alginateÀÇ °æ¿ì 5 ? 6ÀÏ¿¡¼­ ±Þ°ÝÇÑ ºÎÇÇ º¯È­¸¦ º¸¿´´Ù.

°á·Ð: ¾ËÁö³×ÀÌÆ®ÀÇ È¥ÇÕ ¹æ¹ýÀº üÀû ¾ÈÁ¤¼º¿¡ ¿µÇâÀ» ÁÖÁö ¾ÊÀ¸¸ç, extended-pour ¾ËÁö³×ÀÌÆ®°¡ ÀüÅëÀûÀÎ ¾ËÁö³×ÀÌÆ®º¸´Ù Àå½Ã°£ üÀû ¾ÈÁ¤¼ºÀÌ ¿ì¼öÇϳª °¡±ÞÀû ºü¸¥ ½Ã°£ ³»¿¡ ¼®°í¸¦ ÁÖÀÔÇÏ´Â °ÍÀÌ ±ÇÀåµÈ´Ù.

Purpose: The purpose of this study is to compare the volume stability depending on the mixing methods and storage time for the conventional alginate and extended-pour alginate.

Materials and methods: An arch-shaped metal model was fabricated, and one conventional alginate and two extended-pour alginates were used to take impressions using different mixing methods (hand and automatic). 120 impressions were taken (40 per each alginate) and stone models were made in accordance with the different storage times (immediate, 2 days, 5 days, and 6 days). The models were scanned with a 3D table scanner and dimensional change was measured by superimposing the scan data. Using SAS 9.4 (SAS Institute Inc., Cary, NC, USA), the general linear model and Tukey's post hoc test was conducted for statistical analysis (P<.001).

Results: There was no statistically significant difference in the dimensional accuracy between two mixing methods, and the volume change was minimum when the stone was poured immediately in all groups. Dimensional accuracy showed a statistically significant difference between groups after 2 days of storage, and extended-pour alginate showed higher accuracy after 5 days of storage comparing to conventional one. Large amounts of volume change were showed at 2 ? 5 days for conventional alginate and at 5 ? 6 days for extended pour alginate.

Conclusion: The mixing method of alginate does not affect volume stability. Although extended-pour alginate has better volume stability than conventional alginate for a long time, it is recommended to pour stone as soon as possible.

Å°¿öµå

¾ËÁö³×ÀÌÆ®; üÀû¾ÈÁ¤¼º; Extended-pour ¾ËÁö³×ÀÌÆ®; ÀλóÀç È¥ÇÕ ¹æ¹ý; ÀλóÀç º¸°ü ½Ã°£
Alginate; Dimensional stability; Extended-pour alginate; Mixing method; Storage time

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