Change in arch width in extraction vs nonextraction treatment.
- Author:
Ji Yun JEON
1
;
Su Jung KIM
;
Seung Goo KANG
;
Young Guk PARK
Author Information
1. Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea. ygpark@khu.ac.kr
- Publication Type:Original Article
- Keywords:
Arch width;
Extraction treatment;
Nonextraction treatment
- MeSH:
Bicuspid;
Constriction;
Dental Arch;
Esthetics;
Molar
- From:Korean Journal of Orthodontics
2007;37(1):65-72
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
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.
