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HYDROLYTIC DEGRADATION OF DENTAL COMPOSITE RESINS

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Abstract

kabstract :
½É¹Ì¼º ¼öº¹Àç·Î¼­ ÀÓ»ó¿¡¼­ ³Î¸® »ç¿ëµÇ´Â º¹ÇÕ·¹ÁøÀº ±¸°­³»¿¡¼­ Àå±â°£ À¯ÁöµÇµµ·Ï ÇÏ
±â À§ÇÏ¿© ±× ¹°¼ºÀ» Çâ»ó½Ãų ÇÊ¿ä°¡ ÀÖ´Ù. º¹ÇÕ·¹ÁøÀÇ ´ÜÁ¡ Áß Çϳª·Î ³·Àº ¸¶¸ð ÀúÇ×¼º
À» µé¼ö ÀÖÀ¸¸ç, ÀÌ¿Í °ü·ÃµÈ ÇϳªÀÇ ÀÎÀÚ·Î ¼öº¹¹°ÀÇ Ç¥¸éÇÏ ºÐÇØ(subsurface degradation)
°¡ °í·ÁµÇ°í ÀÖ´Ù.
º» ¿¬±¸¿¡¼­´Â ¾ËÄ«¸®¼º ¿ë¾×(0.1N NaOH)¿¡ ÇöÀç ÀÓ»ó¿¡¼­ ¸¹ÀÌ ÀÌ¿ëµÇ´Â Clearfil
APX(CL, Kuraray), Heliomolar(H, Vivadent), Surefil(S, Dentsply), Tetric Ceram(TC,
Vivadent), TPH(Dentsply), Z100(3M)ÀÇ 6Á¾ÀÇ º¹ÇÕ·¹ÁøÀ» º¸°üÇÏ¿´À» ¶§ °¢ Á¦Ç°ÀÇ ºÐÇØÀú
Ç×¼ºÀ» Æò°¡ÇÏ°íÀÚ ÇÏ¿´´Ù.
°¢ Á¦Ç°´ç 3°³ÀÇ ½ÃÆíÀ» Á¦ÀÛÇÏ¿© ¹«°ÔÃøÁ¤À» ÇÑ ÈÄ 0.1N NaOH ¿ë¾×¿¡ ÀúÀåÇÏ¿© 60¡É¿¡
¼­ º¸°üÇÏ¿´´Ù. 2ÁÖÈÄ Á¦°ÅÇÏ¿© HCI·Î ÁßÈ­, ¼¼Ã´ ÈÄ 60¡É¿¡¼­ °ÇÁ¶ÇÏ¿´´Ù. ¹«°Ô¼Õ½Ç, ºÐÇØ
Ãþ ±íÀÌ, Si ³óµµµîÀ» ±âÁØÀ¸·Î ºÐÇØÀúÇ×¼ºÀ» Æò°¡ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. °¢ Á¦Ç°ÀÇ ¹«°Ô¼Õ½Ç·®Àº 0.45¡­3.64%±îÁö ´Ù¾çÇϸç Z100, TC, H, S, Cl, TPH ¼øÀ¸·Î
¸¹¾Ò´Ù.
2. °¢ Á¦Ç°ÀÇ Ç¥¸éÇÏ ºÐÇØÃþ ±íÀÌ´Â Á¦Ç°¸¶´Ù ´Ù¾çÇÏ¿©, 10.85¡­73.38§­ÀÇ ¹üÀ§¿´°í, H,
Z100, S, TC, TPH, Cl ¼øÀ¸·Î ±í¾ú´Ù.
3. °¢Á¦Ç°À¸·ÎºÎÅÍ ¿ëÃâµÈ Si ¾çÀº Z100±º 2060ppmÀ¸·Î °¡Àå ¸¹°í, H, TPH, Cl, TC, S¼ø
À¸·Î ¸¹¾Ò´Ù.
4. ¹«°Ô¼Õ½Ç·®°ú Ç¥¸éÇÏ ºÐÇØÃþ ±íÀÌ»çÀÌ¿¡ ³ôÀº »ó°ü°ü°è¸¦ º¸¿´´Ù(r=0.81, p,0.05)
5. ÁÖ»çÀüÀÚÇö¹Ì°æÇÏ °üÂû½Ã NaOH¿ë¾×¿¡ º¸°üÇÑ ÈÄ ·¹Áø±âÁú°ú ÇÊ·¯»çÀÌÀÇ °áÇÕÀÇ Æı«
¸¦ °üÂû ÇÒ ¼ö ÀÖ¾ú´Ù.
#ÃÊ·Ï#
-Abstract-
The composite restorative resins have their insufficient resistance to wear. The
subsurface degradation within the restoration is considered to be associated with wear.
The aim of this study was to evaluate the resistance to degradation of six ommercial
composite resins in an alkaline solution.
The brands studied were Clearfil APX(Kuraray), Heliomolar(Vivadent),
Surefil(Dentsply), TPH(Dentsply), Tetric Ceram(Vivadent), and Z100(3M). Preweighed
discs of each brand were exposed 0.1N NaOH solution at 60¡É. After 14 days they were
removed, neutralized with HCL, washed with water and dried to constant mass at 60¡É.
Resistance to degradation was evaluated on the basis of the following parameters : (a)
mass loss(%)-determined from pre-and post-exposure specimen weights: (b) Si loss
(ppm)-obtained from ICP-AE analysis of solution exposed to specimens: and (c)
degradation depth(§­)-measured microscopically (SEM) from polished circular sections of
exposed specimens.
The results were as follow :
1. The mass loss was in descending order by Z100, TC, H, S, CL, TPH and in the
range of 0.45¡­3.64%
2. The degradation layer depth was in descending order by H, Z100, S, TC, TPH, CL
and in the range of 10.85¡­73.38§­
3. For the Si concentration, Z100 was the highest of all.
4. The highly significant correlation(r=0.81, p<0.05) was observed between mass loss
and degradation depth.
5. Under scanning electronmicroscopy, the degradation of connection between resin
matrix and fillers was observed 2 weeks after soaking in NaOH solution.

Å°¿öµå

º¹ÇÕ·¹Áø; Ç¥¸éÇÏ ºÐÇØ; ¾ËÄ«¸®¼º ¿ë¾×; Composite resins; Subsurface degradation; Alkaline solution;

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