Lip profile changes in patients with Class II Division 1 malocclusion of varied growth patterns treated with maxillary premolar extractions: A pilot study

Mishra, Divya and Natarajan, Madhumitha and Urala, Arun S (2020) Lip profile changes in patients with Class II Division 1 malocclusion of varied growth patterns treated with maxillary premolar extractions: A pilot study. American Journal of Orthodontics and Dentofacial Orthopedics, 158 (5). pp. 684-693. ISSN 0889-5406

[img] PDF
10375 DisplayPdf.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy

Abstract

Introduction: This retrospective pilot study assessed the pre- and posttreatment lip profile changes among adult patients with Class II Division 1 malocclusion of varied growth patterns and compared these changes with patients with a skeletal Class I relationship, to identify the dental, skeletal, and soft tissue cephalometric variables that altered the posttreatment lip profile. Methods: A total of 33 digital cephalograms were divided into 4 study groups based on the mandibular plane (Mp-SN) angle: group 1 (control, skeletal Class I; mean angle 5 21.5�)(n 5 8), group 2 (Class II Division 1 malocclusion; low angle 5\26�) (n 5 8), group 3 (Class II Division 1 malocclusion; intermediate angle526�-38�) (n59), and group 4 (Class II Division 1 malocclusion; high angle5.38�)(n 5 8). Results: We observed a significant decrease in SNA, ANB, maxillary incisor to NA (degrees and millimeters),and soft tissue parameters, especially lip strain and lower lip to E line and upper lip to E line. Posttreatment intergroup comparison showed a significant increase of Mp-SN, and this increase was greater in group 3,followed by group 4 as compared with group 1. In addition, statistically significant differences in SNA, ANB,mandibular incisor to NB (degrees) and IMPA, and H angle in groups 2-4 were observed. Conclusions: Patients with Class II Division 1 malocclusion showed a significant decrease in SNA, ANB, maxillary incisor to NA, and all soft tissue parameters in posttreatment compared with group 1. Thus, the soft tissue changes resulted in a similar profile to patients in group 1, who are considered to have an aesthetically pleasing posttreatment profile

Item Type: Article
Subjects: Dentistry > MCODS Manipal > Orthodontics
Depositing User: KMC Library
Date Deposited: 11 Jan 2021 05:48
Last Modified: 11 Jan 2021 05:48
URI: http://eprints.manipal.edu/id/eprint/156266

Actions (login required)

View Item View Item