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The International Journal of Adult Orthodontics & Orthognathic Surgery
(Published from 1986-2002)

Edited by Robert L. Vanarsdall, DDS and Raymond P. White, Jr, DDS, PhD

Continued by World Journal of Orthodontics.

ISSN 0742-1931

Publication:
The International Adult Orthodontics & Orthognathic Surgery
September
Volume 16, Issue 4

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Two-dimensional changes in soft tissue profile following surgical mandibular advancement in Japanese retrognathic adults

Takashi Hamada, DDS, PhD, Nobuyoshi Motohashi, DDS, Tatsuo Kawamoto, DDS, PhD, Takashi Ono, DDS, PhD, Yoshiyuki Kato, DDS, PhD, Takayuki Kuroda, DDS, PhD

The purpose of this study was to evaluate changes in the hard and soft tissues and to test a preliminary method for predicting the soft tissue profile changes in 14 Japanese retrognathic patients who underwent surgical mandibular advancement. A pair of pre- and postoperative lateral cephalograms was taken for each subject. A paired t test identified significant hard and soft tissue changes following surgery. A Pearson correlation analysis was used to identify soft tissue changes for hard tissue changes in the horizontal and vertical dimensions. Multiple regression models were generated to predict postoperative variables based on preoperative variables. Significant changes in the hard and soft tissues were found in the area inferior to the point Stomion in both the horizontal and vertical dimensions. The soft tissue changes demonstrated a significant correlation not only with the corresponding hard tissue, but also with noncorresponding anatomical points. Moreover, the tendency of changes in the soft tissue was different in the lower lip area from the chin area in both the horizontal and vertical dimensions. Significant R2 and higher contribution ratio were obtained from the multiple regression analysis for the chin area compared to the lower lip area. (Int J Adult Orthod Orthognath Surg 2001;16:272279)

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