Three-dimensional analysis of smile movement using high speed cameras for the subjects with normal occlusions and jaw deformities

• ISHIKAWA,Takako

  Division of Oral Health, Growth & Development, Graduate School of Dental Science, Kuyshu University

• SAITO,Yoko

  Department of Dental Anesthesia, Anesthesia and Critical Care Center, Kagoshima University Medical and Dental Hospital

• MURAOKA,Shima

  Division of Oral Health, Growth & Development, Graduate School of Dental Science, Kuyshu University

• KITAHARA,Toru

  Division of Oral Health, Growth&Development, Faculty of Dental Science, Kuyshu University

• IOI,Hideki

  Division of Oral Health, Growth&Development, Faculty of Dental Science, Kuyshu University

• NAKASIMA,Akihiko

  Division of Oral Health, Growth&Development, Faculty of Dental Science, Kuyshu University

Bibliographic Information

Other Title

• 正常咬合者および顎変形症患者のスマイル動作の三次元解析

Abstract

We investigated the influences of malocclusions and jaw deformities on the smile motion. The subjects consisted of a control group of 20 subjects with normal occlusions and 10 orthodontic patients with jaw deformities. Six measuring markers on the face (upper lip, lower lip, right-and-left angulus oris, right-and-left cheeks) and 3 reference markers on the upper face were placed on the skin. The motion of the measuring markers was detected automatically by the 3 high-speed cameras during smiling phase and analyzed 3 dimensionally by means of the 3-dimension operation analysis software. The head was not stabilized during the measurements and the motion of the head was canceled by the movement of triangle comprised of three reference markers. Measurements were conducted 3 times for each subject and regarded the mean values as the representative values. The results showed that the lower lips for the jaw deformity patients showed larger displacements to the downward and lateral directions compared with the control subjects even though these showed small displacements to the backward. The upper lip, angulus oris, and cheeks showed small displacements as a whole, especially to the upward and lateral directions. The recovery movements after smiling phase for the jaw deformity patients tended to delay compared with the control subjects. Thus, the features of lower face for the jaw deformity patients showed different movements compared with those of the control group. These results suggest that the morphological abnormity might prevent to express the natural smile.

Journal

• Orthodontic waves : 日本矯正歯科学会雑誌

  Orthodontic waves : 日本矯正歯科学会雑誌 66 (2), 92-105, 2007-06-25

  日本矯正歯科学会

Keywords

• スマイル動作
• 高速度カメラ
• 三次元直交座標系
• 顎変形症患者

Details

• CRID: 1540854195303291264
• NII Article ID: 110006420313
• NII Article ID: 20000778875
• NII Book ID: AA11917839
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10630880
• Web Site: https://search.jamas.or.jp/link/ui/2008048031
• Text Lang: ja
• Data Source:
  • NDL-Digital
  • CiNii Articles
  • KAKEN