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A STUDY ON THE SHEAR BOND STRENGTH AND THE ANTICARIOGENICITY OF GLASS IONOMER CEMENT FOR BRACKET BONDING

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Abstract

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ÆÄÀý ¾ç»óÀÇ °üÂû ½Ã ¥°, ¥±±º¿¡¼­´Â ÁÖ·Î ÀÀÁý¼º ÆÄÀý ¾ç»óÀÌ, ¥²±º¿¡¼­´Â ´ëºÎºÐ ºÎÂø¼º ÆÄÀý ¾ç»óÀÌ Æ¯Â¡ÀûÀ̾úÀ¸¸ç, ¥³±º°ú ¥´±º¿¡¼­´Â ÀÌ»óÀÇ ÆÄÀý ¾ç»óÀÌ È¥ÇÕµÇ¾î °üÂûµÇ¾ú´Ù.
Æò±Õ ¿ì½Ä º´¼ÒÀÇ ±íÀÌ¿¡¼± ±Û¶ó½º ¾ÆÀ̾î³ë¸Ó Á¢Âø±ºÀÎ ¥²±ºÀÌ ·¹Áø Á¢Âø±ºÀÎ ¥°±º, ¥±±º¿¡ ºñÇØ ¾è¾ÒÀ¸¸ç(p<.05), ·¹Áø°£¿¡¼­µµ ¿ª½Ã ºÒ¼Ò À¯¸® ·¹Áø Á¢Âø±ºÀÎ ¥±±ºÀÌ ¥°±º¿¡ ºñÇØ ¾è¾Ò´Ù(p<.05) .

The purpose of this study was to compare the shear bond strength and the anticariogenicity of glass ionomer cement with conventional bonding resin and fluoride releasing resin.
After the shear bond strength test, scanning electron microscopic observation was performed for the evaluation of the fracture patterns in each group.
Under the polarizing light microscope, artificially induced carious lesions were evaluated and the lesion depths of the samples were measured using image analyzing program(Image-Pro PLUS USA) .
50 sound maxillary premolars were used for the bond strength test and another 30 for the anticariogenic test. Data collected were analyzed statistically using Oneway-ANOVA and Scheffe test.
The results were as follows:
1. Glass ionomer groups(G-III, IV, V) generally showed the lower bond strength values than resin groups(G-I, II).
2. Among the two resin groups, G-I showed the higher bond strength than G-II without statistically significant difference between them(p).05).
3. Within glass ionomer groups, statistical significance was found between G-III and G-V with the superior bond strength in G-V (p(.05).
4. Under the SEM, adhesive failure was the predominant fracture pattern in G-I and II, whereas cohesive failures were mainly observed in G-III. In G-IV and V, mixed type of pat-tern where the both fracture patterns coexisted within samples could be seen.
5. In evaluation of the depth of artificially developed carious lesion, glass ionomer group showed shallower depth than resin groups with statistical significance between G-III and G-I, II(p.05). Among resin groups, fluoride releasing resin(G-II) showed the shallower depth than conventional resin(G-I) (p(05) .

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±Û¶ó½º ¾ÆÀ̾î³ë¸Ó;ºê¶óÄÏ Á¢Âø¿ë ·¹Áø;Ç׿ì½Ä ÀÛ¿ë;Àü´Ü °­µµ;Glass ionomer;Bracket bonding resin;Anticariogenicity;Shear bond strength.

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