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The effect of chlorhexidine varnish application on the shear bond strength of orthodontic brackets

Korean Journal of Orthodontics 2000³â 30±Ç 2È£ p.215 ~ 223
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ÀÓµ¿Çõ/Dong Hyuk Im ±èÅ¿ì/À念ÀÏ/³²µ¿¼®/¾ç¿ø½Ä/¹é½ÂÇÐ/Tae Woo Kim/Young Il Chang/Dong Suk Nahm/Won Sik Yang/Seoung Hak Baek

Abstract

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ÅÃÇÏ¿´´Ù. ¸ðµç Ä¡¾ÆÀÇ 37%ÀÇ phosphoric acid gel·Î ºÎ½Ä½ÃÅ°°í ±³Á¤¿ë ºê¶óÄÏÀ» °°Àº Á¶
°ÇÀ¸·Î ºÎÂø½ÃÄ×´Ù. Àü´ÜÁ¢Âø°­µµÀÇ ÃøÁ¤À» À§ÇØ Instron universal testing machine(model
4466)À» ÀÌ¿ëÇÏ¿´°í, ¹ý¶ûÁú°ú ºê¶óÄÏ Ç¥¸éÀº SEMÀ¸·Î °üÂûÇÏ¿´´Ù.
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-Abstract-
The purpose of this study was to determine whether the application of chlorhexidine
varnish affects the shear bond strength and failure pattern of orthodontic brackets or
not.
The experimental group consisted of 22 human premolars which extracted after
chlorhexidine varnish application (4 times for 1 week interval) in vivo, and the control
group consisted of 22 human premolars which extracted without any pre-treatment.
After all teeth wee etched with 37% phosphoric acid gel, metal orthodontic brackets
(Q-3002, RMO, USA) were bonded to each tooth using auto-polymerizing orthodontic
resin (Ortho-One, Bisco, USA) with the same bonding procedure.
The shear bond strength was measured with Instron universal testing machine (model
4466, Instron Ltd., England), and the failure pattern of each bracket was examined with
Scanning Electron Microscope (SM 840A, JEOL, Japan).
The data were analysed statistically with t-test. The results were as follows:
1. Application of chlorhexidine varnish had no significant effect on the shear bond
strength of the orthodontic bracket.
2. There was no significant difference in the failure pattern of orthodontic bracket
between the experimental group and the control group.

Å°¿öµå

Ŭ·Î¸£Çí½Ãµò ¹Ù´Ï½¬; Àü´Ü Á¢Âø°­µµ; ºê¶óÄÏ Å»¶ô; Chlorhexidine varnish; Shear bond strength; Bracket failure pattern;

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