Abstract

ABSTRACTIntroduction: A side effect observed in cases treated with extractions is the instability of orthodontic space closure. Objective: The aim of this study was to investigate the influence of gingival invagination, presence of third molars and facial pattern, on the stability of orthodontic space-closure in the maxillary arch. Methods: Ninety-nine subjects (41 male and 58 female) with Class I malocclusion treated with four premolars extraction were evaluated. Extraction sites reopening and gingival invaginations were evaluated in scanned dental models in the posttreatment and 1-year posttreatment stages (mean age 16.1 years). Third molars presence was evaluated at 1-year posttreatment panoramic radiographs, and the facial pattern (SN.GoGn) was evaluated in the initial lateral headfilms. Multiple logistic regression analysis was used to estimate the influence of the aforementioned independent variables on the frequency of extraction space reopening. Results: Space reopening was observed in 20.20% of the subjects 1-year post-debonding. Gingival invaginations were present in 25.73% of quadrants after debonding and in 22.80% 1-year posttreatment. The mean pre-treatment SN.GoGn was 35.64 degrees (SD=5.26). No significant influence was observed of the three independent variables on the instability of extraction site closure. Conclusions: The presence of gingival invaginations, third molars and facial growth pattern do not seem to influence maxillary extraction sites reopening.

Highlights

  • A side effect observed in cases treated with extractions is the instability of orthodontic space closure

  • Multiple logistic regression analysis was used to estimate the influence of the aforementioned independent variables on the frequency of extraction space reopening

  • Gingival invaginations were present in 25.73% of quadrants after debonding and in 22.80% 1-year posttreatment

Read more

Summary

Introduction

A side effect observed in cases treated with extractions is the instability of orthodontic space closure. Some factors such as inadequate dental interdigitation, imbalance between intraoral and extraoral forces, deficient occlusal results after orthodontic treatment, lack of proper retention protocol, distortion of the periodontal fibers, growth pattern and root parallelism have been considered to influence the stability of closed-spaces.[1,3] reevaluation of closed-spaces stability has shown no correlation with some of these factors.[3,4] No previous study has evaluated the influence of gingival invagination, presence of third molar and facial growth on opening of extraction space using regression analysis

Methods
Results
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call