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Evaluation of soft tissue changes around the lips after bracket debonding using three-dimensional stereophotogrammetry

Cited 11 time in Web of Science Cited 11 time in Scopus

Kim, Young Kyun; Lee, Nam Ki; Moon, Sang Woon; Jang, Moon Jung; Kim, Hyun Suk; Yun, Pil Young

Issue Date
E H Angle Orthodontists Research & Education Foundation, Inc.
Angle Orthodontist, Vol.85 No.5, pp.833-840
Objective: To evaluate the changes in soft tissue around the lips after orthodontic bracket debonding using three-dimensional (3-D) stereophotogrammetry. Materials and Methods: 3-D facial images of 20 subjects (10 men and 10 women; mean age, 26.81 +/- 7.23 years) were taken with a white light scanner before and after debonding the labial brackets. Two images acquired from each subject were superimposed, and 15 soft tissue landmarks around the lips were plotted and analyzed. Statistical analysis was performed using both paired and independent t-tests (P < .05). Results: There were no significant changes in position of any landmark on the x (left-right)- or y (vertical)-axes after removal of the brackets. However, the landmarks in the oral commissures and lower lip (LLP, -0.55 mm; Li, -0.44 mm; Ch-L, -0.56 mm, all P < .05) on the z (anteroposterior)-axis showed statistically significant differences. There were no significant positional changes of most landmarks on the x-, y-, or z- axes after bracket removal among the various genders and lip thicknesses. Conclusions: There was a slight retrusion in the oral commissure and lower lip areas after debonding, but no changes were found in the upper lip area. This study showed that 3-D stereophotogrammetry can be useful in evaluating facial soft tissue changes in orthodontic patients.
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Yun, Pil Young윤필영
  • School of Dentistry
  • Department of Dentistry
Research Area Dentistry, Oral Pathology, Oral and Maxillofacial Surgery, 구강병리학, 구강악안면외과학, 치의학


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