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PolyetherketoneketoneÀÇ ¿¬¸¶ Ư¼ºÀÌ Candida albicansÀÇ ºÎÂø¿¡ ¹ÌÄ¡´Â ¿µÇâ

Polishing characteristics of polyetherketoneketone on Candida albicans adhesion

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±èÇö¿µ, ÀÌÁ¾Çõ, À̼ºÈÆ, ¹éµ¿Çå,
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±èÇö¿µ ( Kim Hyun-Young ) - Dankook University College of Dentistry Department of Prosthodontics
ÀÌÁ¾Çõ ( Lee Jong-Hyuk ) - Dankook University College of Dentistry Department of Prosthodontics
À̼ºÈÆ ( Lee Sung-Hoon ) - Dankook University College of Dentistry Department of Oral Microbiology and Immunology
¹éµ¿Çå ( Baek Dong-Heon ) - Dankook University College of Dentistry Department of Oral Microbiology and Immunology

Abstract

¸ñÀû: ÃÖ±Ù Ä¡°ú¿¡ µµÀÔµÈ polyetherketoneketone (PEKK)ÀÇ ¿¬¸¶ Ư¼ºÀÌ Candida albicansÀÇ ºÎÂø¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ±âÁ¸ ÀÇÄ¡»óÀç·áÀÎ polymethylmethacrylate (PMMA)¿Í ºñ±³ÇÏ°íÀÚ ÇÏ¿´´Ù.

Àç·á ¹× ¹æ¹ý: PEKK(±×·ì E)¿Í PMMA(±×·ì M)¸¦ »ç¿ëÇÏ¿© Á÷°æ 8 mm, µÎ²² 2 mmÀÎ ¿øÆÇ ÇüÅ ½ÃÆíÀ» Á¦ÀÛÇÑ ÈÄ ¿¬¸¶ Á¤µµ¿¡ µû¶ó °¢°¢ 2°³ ±×·ìÀ¸·Î ¼¼ºÐÇÏ¿´´Ù(ER, MR: rough; EP, MP: polished, °¢ ±×·ì´ç ½ÃÆí 12°³). ¿¬¸¶´Â SiC ¿¬¸¶Áö·Î ½ÃÇàÇÏ¿´À¸¸ç, ER°ú MR ±×·ì¿¡¼­´Â 600 grit SiC ¿¬¸¶Áö¸¸À¸·Î, EP¿Í MP ±×·ì¿¡¼­´Â 600, 800, 1,000, 1,200 grit SiC ¿¬¸¶Áö·Î ´Ü°èÀûÀ¸·Î ¿¬¸¶ÇÏ¿´´Ù. Ç¥¸éÀÇ Æò±Õ °ÅÄ¥±â´Â ¿øÀڷ°£ Çö¹Ì°æ(AFM)À» »ç¿ëÇÏ¿© Sa°ªÀ» ÃøÁ¤ÇÏ¿´°í ÁÖ»çÀüÀÚ Çö¹Ì°æÀ¸·Î 1,000¹è¿Í 20,000¹è È®´ëÇÏ¿© Ç¥¸éÀ» °üÂûÇÏ¿´´Ù. 24-well ¼¼Æ÷¹è¾ç ¿ë±â¿¡ ¿¬¸¶µÈ ½ÃÆí ¹× C. albicans ÇöŹ¾×À» ³Ö°í 37¡É¿¡¼­ 2½Ã°£ µ¿¾È ¹è¾çÇÏ¿© C. albicansÀÇ ºÎÂøÀ» À¯µµÇÏ¿´À¸¸ç, ºÎÂøµÈ Áø±ÕÀ» ÇÇÆêÆÃÀ» ÅëÇØ ºÐ¸®ÇÏ°í ÇöŹ¾×À» 10 ¹è¾¿ ´Ü°èÀûÀ¸·Î 103 ¹è±îÁö Èñ¼®ÇÑ ÈÄ, Sabouraud dextrose °íü¹èÁö¿¡ ½ºÇÁ·¹´õ¸¦ ÀÌ¿ëÇÏ¿© Á¢Á¾ÇÏ¿´´Ù. 48½Ã°£ ÈÄ °¢ °íü¹èÁö¿¡ Çü¼ºµÈ Áý¶ôÀÇ °³¼ö(CFU/plate)¸¦ ¼¼¾î ±â·ÏÇÏ¿´´Ù. ÃøÁ¤µÈ °ªµéÀÇ Åë°èÀû Â÷À̸¦ È®ÀÎÇϱâ À§ÇØ one-way ANOVA¿Í Tukey HSD test¸¦ ¼öÇàÇÏ°í À¯ÀǼöÁØÀ» 0.05·Î Á¤ÇÏ¿´´Ù.

°á°ú: Æò±Õ Sa °ªÀº MR ±×·ìÀÌ ´Ù¸¥ ±×·ì¿¡ ºñÇØ À¯ÀÇÇÏ°Ô ´õ ³ô°Ô ³ªÅ¸³ª ´Ü°èÀû ¿¬¸¶Áö ¿¬¸¶¹ýÀº PMMA ½ÃÆí¿¡¼­¸¸ À¯ÀÇÇÑ È¿°ú°¡ ÀÖ¾úÀ½À» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù (P < .05). MP ±×·ì°ú EP ±×·ì°£¿¡ Sa °ªÀº À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ÁÖ»çÀüÀÚÇö¹Ì°æ °üÂû°á°ú PEKK ½ÃÆíµéÀÇ Ç¥¸é¿¡¼­ ´Ù¼öÀÇ º¸Ç® °°Àº µ¹±â°¡ Çü¼ºµÇ¾î ÀÖ´Â °ÍÀ» º¼ ¼ö ÀÖ¾ú°í EP ±×·ì¿¡¼­ ´õ ½ÉÇØÁø °ÍÀ» °üÂûÇÒ ¼ö ÀÖ¾ú´Ù. CFU/plateÀÇ Æò±Õ°ªÀº EP ±×·ì¿¡¼­ °¡Àå ³ô°Ô ³ª¿ÔÀ¸¸ç °¡Àå ³·Àº MP ±×·ì°ú À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù (P < .05).

°á·Ð: PMMA¿Í ºñ±³ÇÏ¿© PEKK¿¡¼­´Â ´Ü°èÀû ¿¬¸¶Áö¸¦ ÀÌ¿ëÇÑ ¿¬¸¶¸¦ ½ÃÇà ½Ã C. albicansÀÇ ºÎÂø Áõ°¡·Î À̾îÁú ¼ö ÀÖÀ¸¸ç, ÀÓ»ó¿¡¼­µµ ÀÌ·¯ÇÑ Á¡¿¡ ´ëÇÑ ½ÅÁßÇÑ °í·Á°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.

Purpose: To compare the polishing characteristics and their influence on Candida albicans adhesion to the recently introduced polyetherketoneketone (PEKK) and the conventional polymethylmethacrylate (PMMA) denture resin material.

Materials and methods: Specimens from PEKK (Group E) and PMMA (Group M) were made in dimensions of 8 mm in diameter and 2 mm in thickness. The specimens were further divided into sub-groups according to the extent of polishing (ER, MR: rough; EP, MP: polished, N = 12 each). The specimens were polished using polishing machine and SiC foil. ER and MR group specimens were polished with 600 grit SiC foil only. EP and MP groups were further polished with 800, 1,000, 1,200 grit SiC foils sequentially. To measure the surface roughness values (Sa) of specimens, atomic force microscope (AFM) was used and scanning electron microscope (SEM) observation under 1,000, and 20,000 magnifications was performed to investigate surface topography. The polished specimens were soaked in C. albicans suspension for 2 hours with shaking to promote adhesion. The attached C. albicans were detached from the surface with 10 times of pipetting. The suspension of detached C. albicans was performed by serial dilution to 103 times, and the diluted suspensions were inoculated on Sabouraud dextrose agar plates using spread plate method. After incubating the plate for 48 hours, colony forming unit (CFU)/plate of C. albicans was counted. Statistical analysis was performed using one-way ANOVA and Tukey HSD test to confirm significant difference between the groups (¥á=.05).

Results: Average Sa value was significantly higher in MR group compared to other groups (P<.05), meaning that additional polishing steps reduced surface roughness effectively only in the PMMA specimens. There was no significant difference in Sa values between MP and EP groups. In SEM images, PEKK specimens showed numerous spikes of abraded material protruding from the surface and this phenomenon was more significant in EP group. The mean CFU/plate value was the highest in EP group and this was significant when it was compared to MP group (P<.05) which was the lowest.

Conclusion: Polishing PEKK using serial SiC abrasive foil may result in higher adhesion of C. albicans. In clinic, this should be considered carefully.

Å°¿öµå

Candida albicans; ÀÇÄ¡»ó; Polyetherketoneketone; Polymethylmethacrylate; Ç¥¸é °ÅÄ¥±â
Candida albicans, Denture base; Polyetherketoneketone; Polymethylmethacrylate; Surface roughness

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