External root resorption with the self-ligating Damon system-a retrospective study.

Roberta Heiffig Handem,Karina Maria Salvatore De Freitas,Murilo Matias,Marcos Roberto De Freitas,Guilherme Janson,Daniela Gamba Garib,Darwin Vaz De Lima

doi:10.1186/s40510-016-0133-1

Roberta Heiffig Handem, Karina Maria Salvatore De Freitas + Show 5 more

Open Access

https://doi.org/10.1186/s40510-016-0133-1

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Abstract

BackgroundThe aim of this study was to compare the degree of external apical root resorption (EARR) in patients treated with self-ligating Damon appliances and with conventional preadjusted appliances.MethodsThe sample comprised 52 patients, divided into two groups. Group 1 consisted of 25 patients treated with self-ligating Damon appliances, with an initial age of 16.04 years, final age of 18.06 years, and treatment time of 2.02 years. Group 2 consisted of 27 patients, treated with conventional preadjusted appliances, with an initial age of 16.77 years, final age of 18.47 years and treatment time of 1.70 years. The groups were matched regarding the initial and final ages, treatment time, type of malocclusion, and treatment protocol without extractions. Root resorption was evaluated on periapical radiographs of the maxillary and mandibular incisors at the end of orthodontic treatment with the scores of Levander and Malmgren. Intergroup comparisons of root resorption were performed with Mann-Whitney tests.ResultsNo significant difference in the degree of root resorption between the two groups was found.ConclusionsSimilar degrees of resorption can be expected after non-extraction treatment with Damon self-ligating or conventional preadjusted appliances.

Highlights

The aim of this study was to compare the degree of external apical root resorption (EARR) in patients treated with self-ligating Damon appliances and with conventional preadjusted appliances
A faster correction of the malocclusion could lead to undesirable side effects, such as root resorption, which is a great concern for orthodontists [5]
According to this and the fact that mechanical forces are a key factor in the occurrence of EARR, studies have shown that the appliance or technique used for an orthodontic treatment can be related to the degree of EARR [11,12,13,14]

Summary

Introduction

The aim of this study was to compare the degree of external apical root resorption (EARR) in patients treated with self-ligating Damon appliances and with conventional preadjusted appliances. Several factors have been investigated, and intrusion and retraction have been considered the main causes of EARR [4, 6,7,8,9,10,11] According to this and the fact that mechanical forces are a key factor in the occurrence of EARR, studies have shown that the appliance or technique used for an orthodontic treatment can be related to the degree of EARR [11,12,13,14]. The Damon system (Ormco, Glendora, CA) is based on the use of a passive self-ligating bracket and superelastic nickel-titanium wires [18] This system is attractive due to the promise of excellent treatment of almost every patient, providing treatment without extractions, orthognathic surgery, palatal expansion, and pain, within a short period of time [19].

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