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STUDIES ON THE SURFACE ROUGHNESS AND COLOR CHANGES OF GLASS IONOMER IN VARIOUS ORGANIC ACID SOLUTIONS

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Abstract

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Ä¥±â ¹× »ö º¯È­ µî ½É¹Ì¼º¿¡ Å« ¿µÇâÀ» ÁÙ ¼ö ÀÖ´Ù. º» ¿¬±¸´Â È­ÇÐÁßÇÕÇü ¹× ±¤ÁßÇÕÇü ±Û
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ó¸®ÇÑ ÈÄ Ç¥¸éÁ¶µµ¿Í »ö º¯È­¸¦ ÃøÁ¤ÇÏ¿© À¯±â»ê¿¡¼­ ³óµµ ¹× ½ÃÈ¿½Ã°£ÀÌ ±Û¶ó½º ¾ÆÀÌ¿À·Î
¸Ó ½Ã¸àÆ®¿¡ ÁÖ´Â ¿µÇâÀ» ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
½ÇÇ豺À¸·Î È­ÇÐÁßÇÕÇü ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ® 3 Á¾°ú ±¤ÁßÇÕÇü ±Û¶ó½º ¾ÆÀ̸ð³ë¸Ó ½Ã
¸àÆ® 3 Á¾ µî 6 Á¾À» »ç¿ëÇÏ¿´´Ù. ºÐ¸»°ú ¿ë¾×À» È¥ÇÕÇÏ¿© 10 mm (Áö¸§) ¡¿ 1mm (µÎ²²)
Å©±âÀÇ ±Ý¼ÓÁÖÇü¿¡ ÃæÀüÇÏ¿© À¯¸®ÆÇÀ¸·Î ¾ÐÁ¢ÇÑ ÈÄ È­ÇÐÁßÇÕÇüÀº 10 ºÐ°£ °æÈ­Çϵµ·Ï ÇÏ¿´
°í, ±¤ÁßÇÕÇüÀº Ç¥¸éÀ» 3ºÎºÐÀ¸·Î ³ª´©¾î ¾ç¸éÀ» 20Ãʾ¿ ±¤Á¶»ç ÇÏ¿´´Ù. È­ÇÐÁßÇÕÇüÀº 100%
»ó´ë½Àµµ¿¡¼­ Ãß°¡·Î 1 ½Ã°£ °æÈ­ ÇÏ¿´À¸¸ç ½ÇÇ豺´ç 3 °³ÀÇ ½ÃÆíÀ» ÁغñÇÏ¿´´Ù.
Ç¥¸éÁ¶µµ ÃøÁ¤±â·Î Æò±Õ Ç¥¸éÁ¶µµ (Ra) ¸¦ ÃøÁ¤ÇÏ°í ºÐ±¤±¤µµ°è·Î CIE °è
¼ö L, a, b °ªÀ» ÃøÁ¤ÇÏ¿© Ç¥¸éÁ¶µµ º¯È­ ¹× »ö º¯È­ÀÇ °è»ê¿¡¼­ ±âÁØ°ªÀ¸·Î ÇÏ¿´´Ù. Ãʱâ
ÃøÁ¤À» ÇÑ ½ÃÆíÀº Áõ·ù¼ö¿Í 0.001, 0.01,¹× 0.1 §ßÀÇ ÃÊ»ê,Á¥»ê ¹× ±¸¿¬»ê ¿ë¾×¿¡ ħÁöÇÏ¿© 37
¡ÉÀÇ Ç׿±⿡¼­ 1, 7, 14, 21 ¹× 28 ÀÏ°£ ½Ãȿó¸®ÇÑ ÈÄ Ç¥¸éÁ¶µµ¿Í »ö °è¼ö¸¦ ÃøÁ¤ÇÑ ´ÙÀ½
±âÁØ°ª°ú ºñ±³ÇÏ¿© Ç¥¸éÁ¶µµ º¯È­ (¥ÄRa)¿Í »ö º¯È­ (¥ÄE)¸¦ °è»êÇÏ¿© ´ÙÀ½°ú
°°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. Áõ·ù¼ö¿¡ ½Ãȿó¸®ÇÑ È­ÇÐÁßÇÕÇü ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®ÀÇ Ç¥¸éÁ¶µµ º¯È­¿Í ±¤ÁßÇÕ
Çü¿¡¼­ »ö º¯È­´Â ½ÃÈ¿±â°£¿¡ µû¶ó À¯ÀÇÇÏ°Ô Áõ°¡ÇÏ¿´´Ù (P<0.10).
2. ÃÊ»ê ¿ë¾×¿¡ ½Ãȿó¸®ÇÑ È­ÇÐÁßÇÕÇü ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®ÀÇ »ö º¯È­´Â À¯ÀÇÇÏ°Ô
º¯È­ÇÏ¿´´Ù. ±¤ÁßÇÕÇüÀÇ Ç¥¸éÁ¶µµ´Â À¯ÀÇÇÏ°Ô º¯ÇÏÁö ¾Ê¾ÒÀ¸³ª »ö º¯È­´Â À¯ÀÇÇÏ°Ô º¯È­ÇÏ
¿´´Ù (P<0.10).
3. Á¥»ê ¿ë¾×¿¡ ½Ãȿó¸®ÇÑ È­ÇÐÁßÇÕÇü ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®´Â ³óµµÂ÷ÀÌ¿¡¼­ Å« »ö
º¯È­´Â ¾ø¾úÀ¸¸ç ±¤ÁßÇÕÇüÀÇ »ö º¯È­´Â Áõ°¡³ª °¨¼ÒÇÏ¿´´Ù.
4. ±¸¿¬»ê ¿ë¾×¿¡ ½Ãȿó¸®ÇÑ È­ÇÐÁßÇÕÇü ±Û¶ó½º ¾ÆÀÌ¿À³ë¸Ó ½Ã¸àÆ®´Â ³óµµÂ÷ÀÌ¿¡¼­ Ç¥¸é
Á¶µµ´Â Å©°Ô º¯ÇÏÁö ¾Ê¾ÒÀ¸³ª »ö º¯È­´Â Áõ°¡ÇÏ¿´°í ±¤ÁßÇÕÇüÀÇ ¿ëÇصµ´Â À¯±â»ê¿¡¼­ ³·°Ô
³ªÅ¸³µ´Ù.
#ÃÊ·Ï#
The chemical bonding ability of glass ionomer cement to tooth structure and sustained
fluoride release render glass ionomer cements advantageous over other restorative
materials, such as amalgam and composite resins. Poor polishability and high solubility
in organic solvents, however, are still a significant disadvantage of the existing glass
ionomer cements. The purpose of this study was to estimate the aging effect of glass
ionomer cements in organic acid solutions on surface change and color change.
Using metal molds, disk type specimens, 10 §® ¡¿ 1 §® were prepared from three
chemical-curing and three light-curing glass ionomer cements. Specimens were prepared
from each material following the manufacturer¡Çs instructions, and selfed against a
mylar matrix strip supported by a glass slab. Three specimens were prepared for each
experimental groups. Profilometric analyses were carried out using the surface roughness
tester (Surtronic 3P, Rank Taylor Hobson Ltd., England). Ra values, which
were the mathematical mean values of the departure of the roughness profile from the
mean line calculated by the machine, recorded.
Color measurements (CIE coefficients; L, a, b)were performed using the
spectrophotometer (CM-3500d, Minolta, Japan). Before aging treatment and after 1, 7, 14,
21, and 28 days aged at 37 ¡É in a various organic acid solutions (such as acetic acid,
lactic acid and citric acid) and deionized water, surface roughness and color coefficients
measurements were carried out. Then, surface roughness changes (¥ÄRa)
and color changes (¥ÄE) of specimens were calculated.
From the experiment, the following results were obtained :
1. Chemical-cured glass ionomer cements showed statistically significant surface
roughness changes after aged in the deionized water (p<0.10), and light-cured glass
ionomer cements showed statistically significant color changes after aged in the
deionized water (p<0.10).
2. Chemical-cured glass ionomer cements showed statistically significant color changes
after aged in acetic acid solutions (p<0.10), and light-cured glass ionomer cements did
not showed statistically significant surface roughness changes, but showed statistically
significant color changes after aged in acetic acid solutions (p<0.10).
3. Chemical-cured glass ionomer cements did not showed statistically significant color
changes as a function of concentration of lactic acid solutions (p>0.10), and light-cured
glass ionomer cements showed color changes without specific trends after aged in lactic
acid solutions.
4. Chemical-cured glass ionomer cements did not showed statistically significant
surface roughness changes as a function of concentration of lactic acid solutions
(p>0.10), but showed statistically significant color changes (p<0.10). Light-cured glass
ionomer cements showed significantly less solubility in lactic acid solutions than
chemical-cured glass ionomer cements.

Å°¿öµå

glass ionomer cements; surface roughness; color change;

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