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A STUDY OF MECHANICAL PRE-TREATMENT ON PRIMARY ENAMEL AND ITS EFFECT ON THE BOND STRENGTH

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Abstract

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À§ÇØ 90°³ÀÇ À¯ÀüÄ¡¸¦ ´ë»óÀ¸·Î 6°³ Ä¡¾Æ´Â ÁÖ»çÀüÀÚÇö¹Ì°æ °üÂûÀ» ÇÏ¿´°í 6°³ Ä¡¾Æ´Â ·¹Áø
Àü´Ü°­µµ¸¦ ÃøÁ¤ÇÑ °á°ú ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. ¿¬¸¶¸¦ ½ÃÇàÇÔÀ¸·Î½á È¿°úÀûÀÎ »êºÎ½Ä¾ç»óÀ» ¾ò´Âµ¥ ÇÊ¿äÇÑ »êºÎ½Ä½Ã°£À» ´ÜÃà½Ãų ¼ö
ÀÖ¾ú´Ù.
2. ¿¬¸¶¸¦ ÇÏÁö ¾Ê°í »êºÎ½ÄÇÑ À¯Ä¡Ç¥¸é¿¡¼­ ¹Ì¼¼°øÀÌ °á¿©µÈ prismless layer°¡ ´Ù¼ö °üÂû
µÇ¾úÀ¸¸ç, ¿¬¸¶¸¦ ÇÏ°í »êºÎ½ÄÇÑ À¯Ä¡Ç¥¸é¿¡¼­´Â ´ÉÁÖ±¸Á¶¿Í °ü·ÃµÈ ´Ù¼öÀÇ ¹Ì¼¼°øÀÌ ±ÔÄ¢
ÀûÀ¸·Î ³ªÅ¸³ª prismless layer°¡ Á¦°ÅµÇ¾úÀ½À» º¼ ¼ö ÀÖ¾ú´Ù.
3. ¿¬¸¶¸¦ ½ÃÇàÇÑ ±º¿¡¼­ÀÇ Á¢ÇÕ·ÂÀÌ ½ÃÇàÇÏÁö ¾ÊÀº ±º¿¡¼­ÀÇ Á¢Çշº¸´Ù Å« °ªÀ» ³ªÅ¸³»
¾ú´Ù.
4. Coarse diamond bur¸¦ »ç¿ëÇÏ¿© ¿¬¸¶¸¦ ÇàÇÑ ±º¿¡¼­ Á¢ÇÕ·ÂÀÌ °¡Àå Å©°Ô ³ªÅ¸³µÀ¸¸ç
³ª¸ÓÁö ¿¬¸¶¹æ¹ýµé °£¿¡´Â À¯ÀǼº ÀÖ´Â Â÷ÀÌ°¡ °üÂûµÇÁö ¾Ê¾Ò´Ù.
#ÃÊ·Ï#
The purpose of this study was to determine the effect of the grinding method on the
enamel of primary tooth on the bond strength of composite resin.
Methods of tooth preparation investigated were
1. unground enamel, exposure to 37% phosphoric acid for 60 sec.
2. unground enamel, exposure to 37% phosphoric acid for 120 sec.
3. ground enamel with a diamond bur, exposure to phosphoric acid for 60 sec.
4. ground enamel with a carbide bur, 37% phosphoric acid for 60 sec.
5. ground enamel with a green stone, 37% phosphoric acid for 60 sec.
6. ground enamel with a disk, 37% phosphoric acid for 60 sec.
The shear bond strength of composite resin was tested with a Instron and surface
tomography was examined with a SEM.
The results were as follows ;
1. With grinding of outer enamel surface, etch-time to produce a favorable bonding
surface in primary teeth was shortened.
2. In SEM study, unground surface often had a prismless layer obscuring the rod
patterns. Ground surface showed more effective removal of prismless layer and more
uniformly etched prism patterns.
3. Grinding enhanced the bond strength between the enamel surface and composite
resin.
4. Grinding enamel surface with a coarse diamond bur resulted in the highest bond
strength. There was no significant difference in the bond strength between other
grinding methods.

Å°¿öµå

acid-etching; bond strength; primary tooth; grinding;

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