Enamel evaluation by scanning electron microscopy after debonding brackets and removal of adhesive remnants
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Data
2018
Tipo de documento
Artigo completo publicado em periódico
Título da Revista
ISSN da Revista
Título de Volume
Área do conhecimento
Ciências da Saúde
Modalidade de acesso
Acesso aberto
Editora
Autores
Claudino, Dikson
kuga, Milton Carlos
Belizário, Lauriê
Pereira, Jefferson Ricardo
Orientador
Coorientador
Resumo
Background: The bonding of accessories in the dental crown during the orthodontic treatment creates microporosities, thus promoting micromechanical retention of the adhesive to the enamel structure. After debonding brackets,
at the end of the active orthodontic treatment, a certain amount of adhesive remnants must be mechanically removed from the enamel. The objective of this study was to compare, by means of scanning electron microscopy, three
different methods to remove the adhesive remnants after orthodontic bracket removal.
Material and Methods: An experimental analytical study was conducted on human premolar specimens, extracted within a year or less. The preparation of the enamel was carried out with the application of 35% phosphoric
acid and Transbond XT Light Cure Adhesive Primer® adhesive. Edgwise Standart prescription brackets, slot .022
“(Morelli Orthodontia) were glued to the enamel using Transbond XT® bonding resin. The brackets were placed
on the center of the vestibular face of the clinical crown, and a 300-gram pressure was exerted against the surface
of the enamel, measured with an orthodontic dynamometer. The brackets were debonded with adhesive removing
pliers, and the samples were divided into groups, according to the protocol used for adhesive remnant removal:
high-speed multi-laminated drill bit, low-speed multi-laminated drill bit, and low-speed glass fiber. After removal
of the adhesive remnants, the samples went through scanning electron microscopy, obtaining electro micrographs
with a magnification range of 150 X, 500 X, and 2,000 X.
Results: The tested method showed that the best effectiveness for the removal of the adhesive remnants after bracket debonding was the use of a tungsten carbide multi-laminated high speed, followed by the use of a tungsten
carbide multi-laminated, low-rotation drill. The use of fiberglass drill alone has proved to be inefficient for clinical
use, given the large amounts of adhesive remnants it leaves on the enamel
Conclusions: All methods evaluated in this study proved to be inefficient for total removal of adhesive remnants
from the enamel.
Palavras-chave
Dental enamel, Microscopy, Orthodontics