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THE EFFECT OF CO2 LASER IRRADIATION ON ENAMEL SURFACE AND THE BOND STRENGTH OF SEALANT MATERIAL

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Abstract

°á·Ð
Ä¡¸é ¿­±¸ Àü»öÁ¦ µµÆ÷½Ã ź»ê°¡½º·¹ÀÌÀú¸¦ »ç¿ëÇÏ¿© ¹ý¶ûÁú Żȸ ÈÄ ¾ò¾îÁö´Â °áÇÕ·ÂÀ»
±âÁ¸ÀÇ »ê ºÎ½Ä°ú ºñ±³Çϱâ À§ÇØ ÃÖ±Ù ¹ß°Å µÈ 52°³ÀÇ ¼Ò±¸Ä¡ÀÇ Çù,¼³¸é¿¡ ´ÜÀ§ ¸éÀû´ç ¿¡
³ÊÁö ¹Ðµµ 23.9J/cm2, 30.8j/cm2, 34.2J/cm2 ·Î Á¶
»çÇÑ ÈÄ Àü´Ü°­µµ¸¦ ÃøÁ¤ÇÏ¿´À¸¸ç, ·¹ÀÌÀú Á¶»çµÈ ¹ý¶ûÁú Ç¥¸é°ú Àü´Ü°­µµ ÃøÁ¤ ÈÄ ÆÄÀý ¾ç
»óÀ» ÁÖ»çÀüÀÚ Çö¹Ì°æÀ¸·Î °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. »êºÎ½Ä±º(I)¿¡¼­ °¡Àå ³ôÀº Àü´Ü°­µµ¸¦ ³ªÅ¸³ÂÀ¸¸ç, ¸ðµç ·¹ÀÌÀú Á¶»ç±º(¥±, ¥², ¥³)°úÀÇ
»çÀÌ¿¡¼­ Åë°èÇÐÀûÀÎ À¯ÀÇÂ÷¸¦ ³ªÅ¸³Â´Ù(p<.05).
2. ·¹ÀÌÀú Á¶»ç±º(¥±, ¥², ¥³)ÀÇ Àü´Ü°­µµ ÃøÁ¤Ä¡°£ÀÇ Â÷ÀÌ´Â Åë°èÇÐÀûÀÎ À¯ÀǼºÀ» ³ªÅ¸³»
Áö ¾Ê¾Ò´Ù(p>.05).
3. »ê ºÎ½Ä±ºÀÇ Ç¥¸éÀº ÀüÇüÀûÀÎ ¿­¼è±¸¸Û(Key-hole)Çü»óÀÇ ºÎ½ÄÇüÅ°¡ Ç¥¸é Àü¹Ý¿¡ °ÉÃÄ
±ÕÀÏÇÏ°Ô ºÐÆ÷µÇ¾î ³ªÅ¸³µ´ø ¹Ý¸é, ·¹ÀÌÀú°¡ Á¶»çµÈ ¹ý¶ûÁúÀº Àü¹ÝÀûÀ¸·Î °ÅÄ£ Ç¥¸éÀ» º¸¿´
°í ¼Ò°ø°ú ¹Ì¼¼ ±Õ¿­, ¿ëÀ¶ºÎ µîÀÇ ´Ù¾çÇÑ ÇüÅ°¡ ºÒ±ÔÄ¢ÇÏ°Ô ºÐÆ÷µÇ¾î ÀÖ¾ú´Ù. ¶ÇÇÑ Á¶»ç
¿¡³ÊÁö ¹ÐµµÀÇ Áõ°¡¿¡ µû¶ó ÆòÈ°ÇÑ À¯¸®¸éÀÌ Çü¼ºµÇ´Â ¾çÅ°¡ °üÂûµÇ¾ú´Ù.
4. ÁÖ»çÀüÀÚ Çö¹Ì°æÀ¸·Î °üÂûµÈ »ê ºÎ½Ä±ºÀÇ ÆÄÀý¾ç»óÀº ´ëºÎºÐ ÀÀÁý¼º(cohesive)ÀÎ ¹Ý¸é,
¸ðµç ·¹ÀÌÀú Á¶»ç±ºÀº ºÎÂø¼º(adhesive)ÀÌ ´ëºÎºÐÀ̾ú´Ù.
5. ÀÌ»óÀÇ °á°ú¿¡¼­ ·¹ÀÌÀú Á¶»ç¿¡ ÀÇÇØ ¹ý¶ûÁú Ç¥¸éÀÌ °ÅÄ¥°í ºÒ±ÔÄ¢ÇÏ°Ô Çü¼ºµÇ¾úÀ¸³ª
·¹ÀÌÀú Á¶»ç¿¡ ÀÇÇÑ Ç¥¸é ±¸Á¶ÀÇ º¯È­°¡ Àü»öÁ¦°¡ ħÅõµÇ¾î ÃæºÐÇÑ °áÇÕ°­µµ¸¦ ³ªÅ¸³¾ ¼ö
ÀÖ´Â ¹Ì¼¼ ±â°èÀû À¯ÁöÇüÅ·δ ºÎÁ·ÇÑ °ÍÀ¸·Î Æò°¡µÇ¾ú´Ù.
µû¶ó¼­ ·¹ÀÌÀú °øÇÐÀ» Á¢Âø¼º Ä¡°úºÐ¾ß(Adhesive dentistry)¿¡ Àû±Ø È°¿ëÇϱâ À§Çؼ­´Â,
»ê¿¡ ÀÇÇÑ ¹ý¶ûÁú Ç¥¸éÀÇ ºÎ½Ä¾ç»ó¿¡ º¸´Ù ±ÙÁ¢Çϸ鼭 À¯»çÇÑ °áÇÕ·ÂÀ» ã±â À§ÇÑ ÇâÈÄÀÇ
³ë·ÂÀÌ ¿ä±¸µÈ´Ù.
#ÃÊ·Ï#
In this study, attempt has been made to evaluate the effect of CO2 laser
irradiation on enamel surface structure and the bond strength of sealant material.
Conventional acid etching was used as a control technic for comparison.
The results obtained from this experiment were as follows ;
1. The highest mean shear bond strength value was observed in samples of Group I
(acidetching) with the stasistical significance (p<.05) between all the other groups.
2. The shear bond strength in Group ¥³ was the lowest among laser etching groups.
but there were no significant difference between them (p>.05).
3. Scanning electron microscopic observation showed that the rough and irregular
surface was created by CO2 laser treatment with the formation of
numerous pores, micro-cracks, and small bubble-like inclusion.
Increasing the energy density induced localized surface melt with a thin smooth
glace-like appearance.
4. In acid-etched control specimen cohesive failure predominated, whereas adhesive
failure was the main mode in laser-treated group.
Based upon the above-mentioned results, it can be assumed that the
CO2 laser is not an adequate substitute for the acid-etch technique in
enamel preconditioning.
More studies are required to explore the effective condition of laser irradiation which
could attain the better bond strength of restorative materials.

Å°¿öµå

Acid etching; CO2 laser; Sealant; Shear bond strength;

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