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66 rev port estomatol med dent cir maxilofac. 2017;58(2):65-70

Adesão de brackets ortodônticos a superficies acrílicas.
Uma revisão sistemática sobre estudos in vitro.

r e s u m o

Palavras-chave: Objetivos: O objetivo deste estudo foi efetuar uma revisão sistemática da literatura sobre
Resina acrilica testes in vitro de resistência à adesão entre brackets ortodônticos e dentes acrílicos.
Adesão Métodos: Foi realizada uma pesquisa abrangente em bases electrónicas, sem limites de data
Coroas ou idioma. Os estudos relevantes foram selecionados com base nos seguintes critérios pré-
Colagem -definidos: investigação in vitro sobre resistência ao cisalhamento/tração dos brackets ava-
Brackets ortodônticos liada e apresentada em megapascais e/ou considerando o índice de adesivo remanescente;
Material provisório estudos com explicação clara da técnica/protocolo de adesão, adesivos e tipo de material
acrílico das superfícies.
Resultados: dos 2044 artigos publicados apresentados pelas quatro bases de dados elec-
trónica, 28 foram selecionados com base no título e 14 com base no resumo. Apenas 10
obedeceram aos critérios definidos e foram incluídos após análise por dois revisores, duas
vezes.
Conclusão: O tipo de superfície parece influenciar a adesão e o tratamentos destas deve
ser realizado para melhorar a adesão. (Rev Port Estomatol Med Dent Cir Maxilofac.
2017;58(2):65-70)
© 2017 Sociedade Portuguesa de Estomatologia e Medicina Dentária.
Publicado por SPEMD. Este é um artigo Open Access sob uma licença CC BY-NC-ND
(http://creativecommons.org/licenses/by-nc-nd/4.0/).

Introduction Methods

Nowadays, the strategy of bonding brackets to acrylic resin Published in vitro studies on orthodontic bond strength tests
surfaces is often applied in the cases of patients with provi- regarding bonding orthodontic brackets to acrylic teeth were
sional prosthetic structures. However, the bond strength bet- included. No date or language limits were implemented.
ween bracket, adhesive and synthetic surfaces is still a con- A comprehensive electronic database search with no date
cern during the orthodontic treatment. Additionally, bond or language limits was conducted, and references in relevant
failure of brackets during orthodontic treatment has a time- articles were searched manually for additional literature. Also,
cost impact and leads to patient inconvenience. 1 the search was not restricted to any type of study design.
Provisional crowns of Bis-acrylic resins are methyl metha- The following electronic databases were searched: MED-
crylate resins enhanced with glass particles for a higher me- LINE, PubMed, ClinicalKey, Lilacs and Web of Science. The
chanical resistance. 2,3,4 A chemical and mechanical adhesion search strategy was focused on the following terms: ortho-
should be performed to bond orthodontic brackets to those dontic bracket, acrylic resins, crowns, dental bonding, pro-
materials. For that reason, different bonding protocols are des- visional material , provisional crown* and acrylic* . MeSH
cribed in the literature. 4,5 terms were used in the PubMed database (Table 1).
As known, in vivo testing in controlled trials would be To be included in the review, the studies had to meet the
6
the best way to evaluate the effectiveness of protocols. following selection criteria: in vitro investigation on the shear
However, in vivo tests on bonding brackets to provisional (SBS) or tensile (TBS) bond strength of orthodontic brackets
teeth during orthodontic treatment are scarce or even null evaluated and expressed in megapascals (MPa) and/or on the
in the literature. adhesive remnant index (ARI); and studies with a clear expla-
In vitro studies possibly allow the use of more standardised nation of the bonding technique/protocol, the bonding mate-
procedures for testing a specific bonding system. However, rials and the type of surface acrylic material used.
there is a great diversity of experimental conditions used for Two reviewers independently screened the titles of the re-
bond strength testing. 1 trieved records, and those related to bond strength between the
The aims of this study were to systematically review the orthodontic bracket and acrylic surfaces were included. The ab-
available literature about in vitro orthodontic bond strength stracts of the selected publications were read. When an abstract
tests regarding bonding brackets to acrylic teeth and to anal- was considered relevant by at least one author, the correspond-
yse which materials and technique/protocol present the high- ing article was read. On a second stage, full-text articles of rele-
est success rate. vant studies were obtained for eligibility and analysed consid-