Smile esthetics after orthodontic treatment with and without extraction of four first premolars.

@article{Johnson1995SmileEA,
  title={Smile esthetics after orthodontic treatment with and without extraction of four first premolars.},
  author={David K Johnson and Russell J. Smith},
  journal={American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics},
  year={1995},
  volume={108 2},
  pages={162-7}
}
Standardized frontal photographs were taken of the face during smiling for 60 retention patients; 20 from each of three different private orthodontic practices. Thirty patients had been treated with extraction of four first premolars, and 30 with full edgewise appliances but no extractions. Smile esthetics were judged by a panel of 10 laypersons. There were no significant differences in the mean esthetic score of extraction and nonextraction patients. The only variable that strongly predicted… CONTINUE READING

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