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The effects of electrical current from a micro-electrical device on tooth movement

Korean Journal of Orthodontics 2008³â 38±Ç 5È£ p.337 ~ 346
±èµ¿È¯, ¹Ú¿µ±¹, °­½Â±¸,
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±èµ¿È¯ ( Kim Dong-Hwan ) - °æÈñ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
¹Ú¿µ±¹ ( Park Young-Guk ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
°­½Â±¸ (  ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç

Abstract

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Objective: The purpose of this study was to determine whether an exogenous electric current to the alveolar bone surrounding a tooth being orthodontically treated can enhance tooth movement in human and to verify the effect of electric currents on tooth movement in a clinical aspect.

Methods: This study was performed on 7 female orthodontic patients. The electric appliance was set in the maxilla to provide a direct electric current of 20?A. The maxillary canine on one side was assigned as the experimental side, and the other as control. The experimental canine was provided with orthodontic force and electric current. The control side was given orthodontic force only. Electrical current was applied to experimental canines for 5 hours a day. The amount of canine movement was measured with an electronic caliper every week.

Results: The amount of orthodontic tooth movement in the experimental side during 4 weeks was greater by 30% compared to that of the control side. The amount of increase in tooth movement in the experimental side was statistically significant. The amount of tooth movement in the experimental side during the first two weeks was greater than that in the following two weeks. The amount of weekly tooth movement in the control side was decreased gradually.

Conclusions: These results suggested that the exogenous electric current from the miniature electric device might accelerate orthodontic tooth movement by one third and have the potential to reduce orthodontic treatment duration. (Korean J Orthod 2008;38(5): 337-346)

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Ä¡¾ÆÀ̵¿;ÃʼÒÇü Àü±âÀåÄ¡;¹Ì¼¼Àü·ù
Electric appliance;Tooth movement;Canine retraction

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