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Change in arch width in extraction vs nonextraction treatment

Korean Journal of Orthodontics 2007³â 37±Ç 1È£ p.65 ~ 72
ÀüÁöÀ±, ±è¼öÁ¤, °­½Â±¸, ¹Ú¿µ±¹,
¼Ò¼Ó »ó¼¼Á¤º¸
ÀüÁöÀ± ( Jeon Ji-Yoon ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
±è¼öÁ¤ ( Kim Su-Jung ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
°­½Â±¸ (  ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
¹Ú¿µ±¹ ( Park Young-Guk ) - °æÈñ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç

Abstract

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Objective: This study was performed to investigate the influences of extraction and nonextraction treatment on smile esthetics by measuring dental arch width changes. Methods: Pretreatment and posttreatment study models of 30 first premolar extraction cases and 30 nonextraction cases were randomly selected to determine whether extraction treatment results in narrow dental arches, and a consequent unaesthetic smile. Arch widths were measured from the cusp tips of the canines and the first molars. Posterior arch widths were also measured at a constant arch depth derived by averaging randomly chosen nonextraction models. Results: The intercanine widths increased significantly in the extraction sample, whereas the intermolar widths decreased significantly. The arch width at a standardized arch depth was significantly wider in the extraction subjects. Conclusion: These results elucidate that constriction in arch width is not a materialized consequence of extraction treatment. It leads to postulate that an esthetically compromising effect from narrow dental arches on smile is hardly anticipated with extraction treatment.

Å°¿öµå

¾Ç±Ã Æø°æ;¹ßÄ¡ Ä¡·á;ºñ¹ßÄ¡ Ä¡·á
Arch width;Extraction treatment;Nonextraction treatment

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