A three-dimensional method for evaluating changes in lip morphology following correction of functional anterior crossbite. Issue 4 (December 2017)

• Record Type: Journal Article
• Authors: Jogaki, Chihiro; Tome, Wakako; Kuroyanagi, Fumi; Kitai, Noriyuki
• Is Part Of: Orthodontic waves. Volume 76:Issue 4(2017:Dec.)
• Page Start: 226
• Page End: 231
• Publication Date: 2017-12
• Subjects: 3D -- Lip morphology -- Anterior crossbite; Orthodontics -- Periodicals; Orthodontics -- Periodicals; Orthodontie -- Périodiques; Orthodontie; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 617.643
• DOI: 10.1016/j.odw.2017.09.005
• Languages: English
• ISSNs: 1344-0241

Abstract

Abstract: Purpose: The purpose of the present study was to present a three-dimensional method for evaluating changes in lip morphology and to apply the method to the therapy evaluation following the correction of functional anterior crossbite. Materials and methods: Twenty-five Japanese patients (age: 6 years and 10 months to 10 years and 9 months) with anterior crossbite and premature contact of at least one central incisor were included. Anterior crossbite was treated with labial movement of the upper anterior teeth using a fixed or removable appliance. Treatment was completed within 6 months. The 3D morphology of the facial soft tissue was recorded using a 3D surface imaging device before and immediately after correction of anterior crossbite. The differences in lip morphology variables were statistically analyzed. Results: At post-treatment, the upper lip was positioned anteriorly and was proclined on the mid-sagittal plane, and anteriorly and superiorly on the plane apart from the midline. The lower lip was positioned posteriorly not only on the mid-sagittal plane but also on the plane apart from the midline. The lower lip was retroclined on the mid-sagittal plane. The submental region was positioned posteriorly and inferiorly. Conclusions: Post-treatment imaging showed forward movement of the upper lip, backward movement of the lower lip, and backward rotation of the soft tissue in the submental region. The three-dimensional method described in the present study improves the evaluation of facial morphology and provides insight into the changes in the lip morphology of preadolescent patients.