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THE EFFECT OF LACTIC ACID CONCENTRATION AND pH OF LACTIC ACID BUFFER SOLUTIONS ON ENAMEL REMINERALIZATION

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±ÇÁß¿ø ( Kwon Jung-Won ) - ¿¬¼¼´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú
¼­´ö±Ô ( Suh Deog-Gyu ) - ¿¬¼¼´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú
¼ÛÀ±Á¤ ( Song Yun-Jung ) - ¿¬¼¼´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú
ÀÌÀ± ( Lee Yun ) - ¿¬¼¼´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú
ÀÌÂù¿µ ( Lee Chan-Young ) - ¿¬¼¼´ëÇб³ ´ëÇпø Ä¡ÀÇÇаú Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸ÀÇ ¸ñÀûÀº À¯»ê ¿ÏÃæ ¿ë¾×ÀÇ pH ¹× À¯»ê ³óµµ º¯È­°¡ ¹ý¶ûÁú¿¡¼­ Àΰø ¿ì½Ä º´¼ÒÀÇ À籤ȭ ¾ç»ó¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡Çϱâ À§ÇÔÀÌ´Ù. À¯»ê ¿ÏÃæ ¿ë¾×À» ÀÌ¿ëÇÏ¿© ¹ý¶ûÁúÀ» Żȸ½ÃÅ°°í, À¯»êÀÇ ³óµµ°¡ 100, 50, 25, 10 mMÀÌ°í pH°¡ 4.3ÀÎ ³× °¡Áö À籤ȭ ¿ë¾× (Group 1, 2, 3, 4)¿¡ 10ÀÏ, pH 6.0ÀÎ ³× °¡Áö À籤ȭ ¿ë¾× (Group 5, 6, 7, 8)¿¡ 12ÀÏ°£ ó¸®ÇÑ ÈÄ ¹«±âÁúÀÇ ¾çÀû º¯È­¸¦ Æí±¤ Çö¹Ì°æ¿¡¼­ ¾òÀº »ó¿¡¼­ÀÇ Å»È¸ ±íÀÌÀÇ º¯È­, ¿ì½Ä Ç¥¸éÃþ ±íÀÌÀÇ º¯È­·Î ÃøÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ micro-computed tomography (micro-CT) ¸¦ ÀÌ¿ëÇÏ¿© Żȸ ÈÄ¿Í À籤ȭ Èĸ¦ ÃÔ¿µÇÏ¿© ¾òÀº »óÀ¸·ÎºÎÅÍ lesion ºÎÀ§ÀÇ density¸¦ ºñ±³ÇÏ¿´´Ù. 1. pH 4.3¿¡¼­ À¯»ê ³óµµ°¡ Áõ°¡ÇÒ¼ö·Ï ¿ì½Ä Ç¥¸éÃþÀÇ Áõ°¡¿Í Ç¥ÃþÇÏ Å»È¸ºÎ Áß ½ÉÃþºÎÀÇ isotropic zone µîÀÇ À籤ȭ Çö»óÀ» º¸À̳ª, Àüü Żȸ ±íÀÌ ¿ª½Ã Áõ°¡ÇÏ¿´´Ù. 2. pH 6.0¿¡¼­ ¿ì½Ä Ç¥¸éÃþ¿¡ ±¹ÇÑµÈ À籤ȭ Çö»óÀ» º¸ÀÌ°í, Àüü Żȸ ±íÀÌ´Â º¯È­°¡ ¾ø¾ú´Ù. ÀÌ»óÀÇ ½ÇÇè °á°ú·Î ¹Ì·ç¾î Æ÷È­µµ°¡ ÀÏÁ¤ÇÑ À¯»ê ¿ÏÃæ ¿ë¾×À¸·Î À籤ȭ À¯µµ½Ã pH°¡ ³·°í À¯»êÀÇ ³óµµ°¡ ³ôÀ»¼ö·Ï Ç¥¸éÀ¸·ÎºÎÅÍ ½ÉÃþºÎ µ¿¿ªÇÐÀû º¯È­¿¡ ´õ ¿µÇâÀ» ÁÖ¾úÀ¸¸ç, micro-CT¸¦ ÀÌ¿ëÇÑ ¿ì½Ä º´¼Ò ºÎÀ§ÀÇ density È®ÀÎÀ» ÅëÇØ ¹«±âÁúÀÇ Ä§Âø°ú ¹æÃâ Çö»óÀ» °´°üÀûÀ¸·Î Æò°¡ÇÒ ¼ö ÀÖ¾ú´Ù.

There are considerable in vitro and in vivo evidences for remineralization and demineralization occurring simultaneously in incipient enamel caries. In order to "heal" the incipient dental caries, many experiments have been carried out to determine the optimal conditions for remineralization. It was shown that remineralization is affected by different pH, lactic acid concentrations, chemical composition of the enamel, fluoride concentrations, etc. Eighty specimens from sound permanent teeth without demineralization or cracks, 0.15 mm in thickness, were immersed in lactic acid buffered demineralization solutions for 3 days. Dental caries with a surface zone and subsurface lesion were artificially produced. Groups of 10 specimens were immersed for 10 or 12 days in lactic acid buffered remineralization solutions consisting of pH 4.3 or pH 6.0, and 100, 50, 25, or 10 mM lactic acid. After demineralization and remineralization, images were taken by polarizing microscopy () and micro-computed tomography. The results were obtained by observing images of the specimens and the density of the caries lesions was determined. 1.As the lactic acid concentration of the remineralization solutions with pH 4.3 was higher, the surface zone of the carious enamel increased and an isotropic zone of the subsurface lesion was found. However, the total decalcification depth increased at the same time. 2.In the remineralization solutions with pH 6.0, only the surface zone increased slightly but there was no significant change in the total decalcification depth and subsurface zone. In the lactic acid buffer solutions with the lower pH and higher lactic acid concentration, there were dynamic changes at the deep area of the dental carious lesion.

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¹ý¶ûÁú;À籤ȭ;À¯»ê;Æí±¤Çö¹Ì°æ
Dental caries;Demineralization;Remineralization;Lactic acid;pH;Polarizing microscopy;Micro-computed tomography

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