Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 06 May 2025

Mandibular incisor root length and root volume changes using removable anterior bite planes in two mealtime protocols in growing deep bite patients: a randomized clinical trial

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DOI: 10.2319/121824-1034.1
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ABSTRACT

Objectives

To compare mandibular incisor root length (RL) and root volume (RV) changes after 6 months of wearing either a removable anterior bite plane (RABP) during meals (F + M) or not during meals (F − M). Additionally, changes in incisal maximum bite force (IMBF) and their correlation with RL and RV changes were assessed.

Materials and Methods

Thirty-six children with deep bite using RABPs full time were randomly assigned in equal numbers to either the F + M group or F − M group. Cone-beam computed tomographic radiographs and IMBF were recorded at baseline (CT0) and after 6 months (CT1). Within and between group comparisons of RL and RV were performed (P = .05) with Bonferroni correction applied for segmental RV differences (P = .008). Relationships between IMBF changes and RL and RV changes were analyzed (P = .05).

Results

Both groups showed significant reductions in RL and RV. RL decrease in the F + M group (0.25 ± 0.14 mm) was significantly greater than in the F − M group (0.21 ± 0.14 mm). Reduction in RV was not significantly different between the groups, but IMBF significantly increased in both groups. Significant correlations were observed between IMBF changes and RL (r = 0.56) and RV (r = 0.86) changes.

Conclusions

Deep bite correction using RABPs for 6 months with F + M protocol resulted in a greater decrease in mandibular incisor RL compared to the F − M protocol. However, RV changes were comparable between protocols. IMBF may influence the degree of RL and RV changes.

Copyright: © 2025 by The EH Angle Education and Research Foundation, Inc.

Contributor Notes

 Dentist, Faculty of Dentistry, Chiang Mai University, Mueang, Chiang Mai, Thailand.
 Associate Professor, Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
Corresponding author: Dr Udom Thongudomporn, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand (e-mail: udom.t@psu.ac.th)
Received: 18 Dec 2024
Accepted: 11 Apr 2025
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