Lateral and apical root resorption in teeth orthodontically moved into edentulous ridge areas.

Adilson Luiz Ramos,Gabriel Araújo Khoury,Rodrigo Lorenzi Poluha,Pablo Guilherme,Joao Marcos Pedro Rosa Junior

doi:10.1590/2177-6709.25.5.024-029.oar

Adilson Luiz Ramos, Gabriel Araújo Khoury + Show 3 more

Open Access

https://doi.org/10.1590/2177-6709.25.5.024-029.oar

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Abstract

ABSTRACTObjective: The present study aimed at comparing the external lateral root resorption (ELRR) and external apical root resorption (EARR) between teeth moved through the atrophic edentulous ridge and those undergoing the usual orthodontic movement. Methods: Fifty-four premolars were evaluated, where 27 of them had been moved toward the edentulous ridge (Group 1) and 27 from the same patient, had not been translated, which comprised the control group (Group 2). ELRR was evaluated by 0-3 scores and EARR was evaluated by 0-4 scores, before and after movement. Measurements were compared by Kruskal-Wallis and Student-Newman-Keuls tests. Results: ELRR increased statistically only in the Group 1 (p< 0.05). After orthodontic treatment, it was observed that almost 56% (n = 15) of teeth in Group 1 presented scores 2 and 3, while Group 2 presented scores 2 and 3 in about 11% (n= 3) of the teeth. EARR increased in both groups after orthodontic movement, however, statistically analyses showed no significant differences between groups (p> 0.05). Conclusions: Orthodontic movement into the atrophic edentulous ridge is subject to a greater lateral external root resorption.

Highlights

After a tooth is extracted, a dimensional reduction of the alveolar bone occurs
The present study aims to compare the external lateral root resorption (ELRR) and external apical root resorption (EARR) between teeth moved through the atrophic edentulous ridge and those undergoing usual orthodontic movement
The null hypothesis should be partially rejected, once the EARR scores were similar in teeth moved through the atrophic edentulous ridge comparing to controls

Summary

Introduction

After a tooth is extracted, a dimensional reduction of the alveolar bone occurs. One year later, it can reduce to an average of 50%.1 Such dimensional loss is more pronounced on the buccal than on the lingual side of the alveolus, and makes implant placement difficult.[2]. It can reduce to an average of 50%.1. Such dimensional loss is more pronounced on the buccal than on the lingual side of the alveolus, and makes implant placement difficult.[2] Among the various procedures for improvement of the alveolar ridge, there are several types of grafting surgeries, lateralization and transposition of the inferior alveolar nerve. They can be considered invasive and/or expensive. The use of orthodontic movement becomes an interesting alternative to restore the dimensions of the atrophic ridge, optimizing the relationship between the adjacent hard and soft tissues.[4,5,6,7]

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