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THE EFFECT OF ETCHING TIME ON THE PATTERN OF ACID ETCHING ON THE ENAMEL OF PRIMARY TEETH

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ÃÖ¼ö¹Ì ( Choi Soo-Mi ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
ÃÖ¼ºÃ¶ ( Choi Sung-Chul ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
ÃÖ¼ºÃ¶ ( Choi Sung-Chul ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç ¹× ±¸°­»ý¹°Çבּ¸¼Ò
ÃÖ¿µÃ¶ ( Choi Young-Chul ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ ±¸°­»ý¹°Çבּ¸¼Ò

Abstract

ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº À¯ÀüÄ¡ ¹ý¶ûÁú¿¡¼­ ¹«¼ÒÁÖ ¹ý¶ûÁú ÃþÀÌ ÀÖ´Â Ä¡°æºÎ¿¡¼­ÀÇ ÀûÀýÇÑ »êºÎ½Ä ½Ã°£À» ¾Ë¾Æº¸°íÀÚ ÇÔÀÌ´Ù. °æÈñ´ëÇб³ Ä¡°ú´ëÇк´¿ø ¼Ò¾ÆÄ¡°ú¿¡ ³»¿øÇÑ È¯¾Æ¿¡°Ô¼­ ¹ß°ÅÇÑ Ä¡¾Æ ¼ø¸é¿¡ ¿ì½ÄÀÌ ¾ø´Â °ÇÀüÇÑ Ä¡¾Æ 32°³¸¦ ´ë»óÀ¸·Î ½ÇÇèÇÏ¿´´Ù. ¹ß°ÅµÈ À¯ÀüÄ¡ÀÇ Ä¡°æºÎ ¹ý¶ûÁúÀ» 35% ÀλêÀ¸·Î ½ÇÇè 1±ºÀº 15ÃÊ, ½ÇÇè 2±ºÀº 30ÃÊ, ½ÇÇè 3±ºÀº 45ÃÊ, ½ÇÇè 4±ºÀº 60ÃÊ°£ »êºÎ½ÄÇÑ ÈÄ ºÎ½Ä½Ã°£¿¡ µû¸¥ ¹ý¶ûÁú Ç¥¸éÀÇ ¾ç»óÀ» SEMÀ¸·Î °üÂûÇÏ¿© Æò°¡ÇÏ¿´´Ù. 1. ½ÇÇè 1±º¿¡¼­´Â Type 3°¡ 75% ³ªÅ¸³µÀ¸¸ç ½ÇÇè 2±º°ú 3±º ¸ðµÎ¿¡¼­ Type 1ÀÌ 38%, Type 2°¡ 50%·Î ³ªÅ¸³µ´Ù. 2. ½ÇÇè 2±ºº¸´Ù ½ÇÇè 3±º¿¡¼­ »êºÎ½ÄµÈ ¾ç»óÀÌ Á»´õ ¶Ñ·ÇÇÏ°Ô ³ªÅ¸³µ´Ù. 3. ½ÇÇè 4±º¿¡¼­ Type 1ÀÌ 25%, Type 2°¡ 75%¸¦ º¸¿´°í Type 3´Â ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù. 4. ½ÇÇè 4±º¿¡¼­´Â ´Ù¸¥ ½ÇÇ豺¿¡¼­ º¸´Ù Á»´õ ÀüÇüÀûÀÎ »êºÎ½Ä ¾ç»óÀ» º¸¿´´Ù. 5. ½ÇÇ豺 °£ÀÇ »êºÎ½Ä ½Ã°£¿¡ µû¸¥ ºÎ½Ä ¾ç»óÀÇ Â÷ÀÌ´Â Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù(p<0.05). 6. »êºÎ½Ä ½Ã°£ÀÌ ±æ¼ö·Ï ºÎÂø¿¡ À¯¸®ÇÑ Type 1°ú Type 2°¡ ÁÖ·Î °üÂûµÇ¾úÀ¸¸ç Type 3´Â µå¹°°Ô °üÂûµÇ¾ú´Ù(p<0.05). À¯ÀüÄ¡¿¡¼­ ¹«¼ÒÁÖ ¹ý¶ûÁú ÃþÀÌ ÁÖ·Î Á¸ÀçÇÏ´Â Ä¡°æºÎ Ãø¿¡, ¿Íµ¿ÀÇ º¯¿¬ºÎ°¡ Çü¼ºµÉ ¶§¿¡´Â »êºÎ½Ä ½Ã°£À» ´Ù¼Ò ±æ°Ô ÃÊ Á¤µµ ÇÏ´Â °ÍÀÌ ¼öº¹¹° À¯Áö¸¦ Çâ»ó½Ãų °ÍÀ¸·Î ¿©°ÜÁø´Ù.

The presence of a "prismless" layer on the enamel surface particularly on deciduous teeth has been reported by a number of workers. This structure, which appears to lack the normal prism delineations, could interfere with tag formation and hence, reduce bonding to such surfaces. The purpose of this study was to investigate the relationship of etching times on the effect of acid etching on primary enamel with respect to the quality of etching patterns. Labial surfaces of 32 extracted or exfoliated caries-free primary anterior teeth were used. 35% phosphoric acid gel was used only cervical regions of labial surfaces for each etching time group, 15, 30, 45 and 60 seconds. The surfaces were then washed with water for 20 seconds and dried with air spray for 20 seconds. 1. The Type 3 is 75% when the 15 seconds acid etching time was used. 2. The Type 1 is 38% and Type 2 is 75% when the 30 and 45 seconds acid etching time was used. 3. The Type 1 is 25% and Type 2 is 75% when the 60 seconds acid etching time was used. 4. An etching time of 60 seconds produced a constant and regular etching pattern. 5. There is a significant difference between the groups with respect to the patterns of etch achieved(p<0.05). 6. We confirmed that the acid induced patterns(type 1, 2) became more pronounced when the application time increased(p<0.05). seconds was the optimal time for etching on the primary enamel.

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Prismless enamel;Etching time;Etching pattern;SEM

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