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AN EXPERIMENTAL STUDY ON THE RESIN BGND STRENGTH USING LASER AND ACID ETCHING ON BOVINE ENAMEL
À̽ÂÀÍ, Â÷°æ, ÃÖÀÎÇõ, ¹éº´ÁÖ,
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¹éº´ÁÖ ( ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ ¼Ò¾ÆÄ¡°úÇб³½Ç
KMID : 0358919960230010261
Abstract
°á·Ð
·¹ÀÌÀúºÎ½ÄÀ» ½ÃÇàÇÔ¿¡ ÀÖ¾î °¡Àå ÀûÀýÇÑ energy levelÀ» °áÁ¤ÇÏ°í, »êºÎ½Ä¹ý°úÀÇ °áÇÕ°
µµ¸¦ ºñ±³Çϱâ À§ÇÏ¿©, ¹ß°ÅµÈ 923°³ÀÇ ÇÑ¿ìÁßÀýÄ¡¿¡ 37% Àλê°ú °¢ 30, 60, 80, 100, 120
±×¸®°í 160mJ energy·Î »êºÎ½Ä ¹× ·¹ÀÌÀúºÎ½ÄÀ» ½ÃÇàÇÑ ÈÄ, ó¸®µÈ ¹ý¶ûÁú¸é°ú º¹ÇÕ·¹Áø
»çÀÌÀÇ Àü´Ü°áÇÕ°µµ¸¦ ÃøÁ¤ÇÏ°í, 󸮹ý¶ûÁú¸éÀ» ÁÖ»çÀüÀÚÇö¹Ì°æÀ» °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº
°á·ÐÀ» ¾ò¾ú´Ù.
1. ÀÎ»ê ¹× ·¹ÀÌÀúºÎ½Ä ÈÄ ¹ý¶ûÁú¸éÀÇ Àü´Ü°áÇÕ°µµ´Â ¥°±º(Àλê 󸮱º)¿¡¼´Â 24.27¡¾
6.87, 2±º(30mJ ·¹ÀÌÀú 󸮱º)¿¡¼´Â 5.50¡¾1.16, 3±º(60mJ ·¹ÀÌÀú󸮱º)¿¡¼´Â 5.77¡¾1.21,
4±º(80mJ ·¹ÀÌÀú 󸮱º)¿¡¼´Â 5.90¡¾1.44, 5±º(100mJ ·¹ÀÌÀú 󸮱º)¿¡¼´Â 6.01¡¾1.95, 6
±º(120mJ ·¹ÀÌÀú 󸮱º)¿¡¼´Â 6.34¡¾1.54 ±×¸®°í 7±º(160mJ ·¹ÀÌÀú 󸮱º)¿¡¼´Â 6.24¡¾
1.44MPa·Î¼, »êºÎ½Ä 󸮱º°ú ·¹ÀÌÀú 󸮱º»çÀÌ¿¡¼ À¯ÀÇÇÑ Â÷¸¦ º¸¿´´Ù(p<0.05).
2. ·¹ÀÌÀú Á¶»ç±ºÀÇ ºñ±³½Ã, 6±º(120mJ ·¹ÀÌÀú 󸮱º)¿¡¼ °¡Àå Å« Àü´Ü°áÇÕ°µµ¸¦ ³ªÅ¸
³ÂÀ¸³ª, °¢ ·¹ÀÌÀú Á¶»ç±º»çÀÌÀÇ Åë°èÀû À¯ÀÇÇÑ Â÷ÀÌ´Â ¾ø¾ú´Ù(p>0.05).
3. 30, 60 ±×¸®°í 80mJÀÇ energy·Î Á¶»çÇÑ ¹ý¶ûÁú¸éÀÇ ÁÖ»çÀüÀÚÇö¹Ì°æ¼Ò°ßÀº ¹Ì¼¼ÇÑ
crack°ú ÀÛÀº projectionÀÌ ³ªÅ¸³µ°í, 100mJ À̻󿡼´Â ´Ù¼öÀÇ ¼Ò°øµé°ú 5¡9¥ìmÀÇ Á÷°æÀ»
°¡Áö´Â crater°¡ °üÂûµÇ¾úÀ¸¸ç, °¡Àå Å« Àü´Ü°áÇÕ °µµ¸¦ º¸ÀÎ 120mJ¿¡¼ °¡Àå ±í°í ¸¹Àº
¼öÀÇ crater°¡ °üÂûµÇ¾ú´Ù.
#ÃÊ·Ï#
The purpose of this study was to determine the optimal energy level to the enamel
surface of bovine teeth when they are irradiated by pulsed Nd:YAG laser and was to
compare acid etching with laser etching.
For the study, the labial enamel surfaces of extracted intact bovine teeth were
irradiated with normal pulsed Nd:YAG laser by six different energy levels of 30, 60, 80,
100, 120 and 160mJ.
The author observed to enamel surface with a scanning electron microscope and
measured the shear bond strength between etched enamel surface and composite resin
by universal testing machine with a crosshead speed of 1§®/min. and investigated
difference acid and laser etching group.
The obtained results were as following .
1. The shear bond strength were 24.26 MPa in Group ¥°, 5.50 MPa in Group ¥±,
5.77MPa in Group ¥², 5.90 MPa in Group ¥³, 6.01 MPa in Group V, 6.34 MPa in Group
¥µ, 6.24 MPa in Group ¥¶. Acid etching Group(Group I) was showed higher bond
strength than other laser etching groups(p<0.05).
2. In laser etching groups, the shear bond strength was highest in 120mJ energy
level(Group ¥µ).
3. Group ¥±, ¥² and ¥³, below 80mJ energy level were observed only microcrack and
small projection in 80mJ energy level(Group ¥³) and group ¥´, ¥µ and ¥¶ were observed
small pore and crater in 5¡9¥ìm diameter, especially in 120mJ energy level(Group ¥µ).
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