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Comparison of flexural strength of temporary restorative resin according to surface polishing and different fabrication methods

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ÀÓÀçÈÆ ( Lim Jae-Hun ) - Wonkwang University College of Dentistry Department of Prosthodontics
ÀÌÀçÀΠ( Lee Jae-In ) - Wonkwang University College of Dentistry Department of Prosthodontics

Abstract

¸ñÀû: Ç¥¸é¿¬¸¶¿Í Á¦ÀÛ¹æ¹ýÀÌ Àӽà ¼öº¹¿ë ·¹ÁøÀÇ ±ÁÈû°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÏ°íÀÚ ÇÑ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: 4°¡Áö Á¦ÀÛ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© °¢°¢ 30°³ÀÇ Àӽà ¼öº¹¿ë ·¹Áø ½ÃÆíÀ» Á¦ÀÛÇÏ¿´°í, ±â°èÀû ¿¬¸¶·Î Ç¥¸é¿¬¸¶¸¦ ½ÃÇàÇÑ ±×·ì°ú ¿¬¸¶¸¦ ½ÃÇàÇÏÁö ¾ÊÀº 2°³ÀÇ ±×·ìÀ¸·Î ³ª´©¾ú´Ù. ½ÃÆíÀº 37¡ÆC Ç׿±⿡ 24½Ã°£ º¸°ü ÈÄ ¸¸´É½ÃÇè±â(Universal testing machine)À» ÀÌ¿ëÇÏ¿© 3Á¡ ±ÁÈû°­µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. Åë°èºÐ¼®Àº Two-way ANOVA¿Í Tukey¡¯s HSD test, Paired t-test¸¦ ÀÌ¿ëÇÏ¿© ºÐ¼®ÇÏ¿´´Ù.

°á°ú: Ç¥¸é¿¬¸¶ ¿©ºÎ¿Í °ü°è¾øÀÌ CAD/CAM millingÀ¸·Î Á¦ÀÛÇÑ ½ÃÆíÀÌ °¡Àå ³ôÀº ±ÁÈû°­µµ¸¦ ³ªÅ¸³Â°í, SLA 3D printing, DLP 3D printing, Conventional method ¼øÀ¸·Î ³ôÀº ±ÁÈû°­µµ¸¦ ³ªÅ¸³Â´Ù.

°á·Ð: Ç¥¸é¿¬¸¶´Â Àӽà ¼öº¹¿ë ·¹ÁøÀÇ ±ÁÈû°­µµ¿¡ À¯ÀÇÇÑ ¿µÇâÀ» ³¢Ä¡Áö ¸øÇßÁö¸¸(P > 0.05), Á¦ÀÛ¹æ¹ý¿¡ ÀÇÇؼ­´Â ±ÁÈû°­µµÀÇ À¯ÀÇÇÑ Â÷ÀÌ°¡ ³ªÅ¸³µ´Ù(P < 0.05).

Purpose: The purpose of this study is to investigate the effect of surface polishing and fabrication method on the flexural strength of temporary restorative resin.

Materials and Methods: Each of four fabrication methods was used to make 30 temporary restorative resin specimens and the specimens were divided into two groups depending on whether they were polished by mechanical polishing. Specimens were stored in 37¡ÆC thermostat for 24 hours. Flexural strength was measured using a universal testing machine (UTM). The data obtained through the experiment were analyzed with Two-way ANOVA, Tukey¡¯s HSD test and Paired t-test.

Results: CAD/CAM milling group showed the highest flexural strength regardless of surface polishing. In decreasing order, the flexural strength of the other fabrication method group was as follows SLA 3D printing, DLP 3D printing, and Conventional method group.

Conclusion: Surface polishing did not affect flexural strength of the temporary restorative resin (P > 0.05). However, there were statistically significant differences in flexural strength depending on fabrication method (P < 0.05).

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±ÁÈû°­µµ; Àӽà ¼öº¹¿ë ·¹Áø; Á¦ÀÛ¹æ¹ý; Ç¥¸é¿¬¸¶
flexural strength; temporary restorative resin; fabrication method; surface polishing

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