Pre- and post- treatment changes in lip position: A retrospective cephalometric study on bimaxillary protrusion cases

---

Original Article

Author Details : Masum Mohapatra*, Ragni Tandon, Kamlesh Singh, Pratik Chandra, Shreya V. Mishra

Volume : 8, Issue : 1, Year : 2024

Article Page : 42-47

https://doi.org/10.18231/j.jco.2024.007

Suggest article by email

---

Abstract

Context: Pre and Post treatment changes in lip position
Aims: To determine the changes in lip position in pre and post treatment lateral Cephalogram in bimaxillary protrusion cases.
Settings and Design: Retrospective Cephalometric study on bimaxillary protrusion cases.
Materials and Methods: The study comprised of 45 subjects (6 Male and 39 Females) aged between 18 to 26 years having Bimaxillary protrusion malocclusion and treated with all four first premolar extraction. The pre-treatment and post treatment lateral cephalograms were traced and landmarks were identified Statistical analysis used: Statistical Package for the Social Sciences (SPSS Version 23; Chicago Inc., IL, USA), Kolmogorov –Smirnov and Shapiro Wilk tests, One-way analysis of variance (ANOVA), Tukey's post hoc analysis.
Results: A positive correlation was found in changes in pre- and post-treatment changes in upper lip curvature, H-Line Angle, Upper sulcus depth, Upper lip strain, changes in the upper lip and the soft tissue from the nose tip, length of upper and lower lip, Nasolabial angle, Upper lip protrusion, Lower lip protrusion. However changes in Facial angle, Steiner’s S line, Upper and lower lip thickness were not statistically significant.
Conclusions: Treatment of Bimaxillary protrusion cases with extraction of all four first premolars resulted in a significant improvement in facial profile, esthetics and enhanced the soft tissue harmony.

Keywords: Bimaxillary protrusion, Lateral cephalogram, Orthodontic treatment, Premolar extraction, Soft tissue changes

How to cite : Mohapatra M, Tandon R, Singh K, Chandra P, Mishra S V, Pre- and post- treatment changes in lip position: A retrospective cephalometric study on bimaxillary protrusion cases. J Contemp Orthod 2024;8(1):42-47

This is an Open Access (OA) journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International, which allows others to remix, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.