Shear bond strength of lingual brackets on enamel surface submitted to acid-etching or Nd:YAG laser irradiation
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2018
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LASER DENTISTRY WORLD CONGRESS, 16th; DGL ANNUAL MEETING, 27th; INTERNATIONAL WALED CONGRESS, 6th
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Resumo
The patient demand for aesthetic
orthodontic solutions is driving
for use of lingual brackets and laser
irradiation can prevent dental
caries in this region. This in vitro
study is the first one in literature
that aimed to quantify the shear
bond strength (SBS) on direct lingual
b rackets bonding after different
enamel surface pre-treatments.
75 bovine incisor teeth
were randomized in 5 groups
(n=15): G1- untreated; G2- treated
with acidulated phosphate
fluoride gel (APF-gel, [F-] =1.23%,
pH=3.3 to 3.9); G3- conditioned
with 37% phosphoric acid (Condoc
37%, FGM, Brazil) and treated
with APF-gel; G4- irradiated
with Nd:YAG loser (1064nm, 0.6W,
10Hz- Laser Research) and treated
APF-gel; GS- irradiated with
Nd:YAG laser + conditioned with
37% phosphoric acid + treated
with APF-gel. The positioning of
the brackets was standardized
during the bonding procedure
using a positioner and Transbond
XT adhesive (3M Unitek, USA) was
used. After bonding, all samples
were thermocycled (500 cycles
between SoC and 55°C) and
submitted to a 48h cariogenic
challenge. After cycling, the
samples were tested for shear bond strength (SBS) in a universal
testing machine (0.5mm/min).
SBS test values were statistically
higher (p<0.05) in the G3 and G5
groups when compared to the
other groups. This study showed
that the Nd:YAG loser irradiation
improved dental adhesion
and increased the mechanical
resistance of the enamel because
the heating promoted by Nd:YAG
laser irradiation changed the
morphological and crystallographic
properties of enamel;
in this way, this treatment also
offers the advantage to prevent
caries around brackets.
Como referenciar
LOPES, MONICA S.; PEREIRA, DAISA L.; MOTA, CLAUDIA C.B.O.; ANA, PATRICIA A.; ZEZELL, DENISE M.; GOMES, ANDERSON S.L. Shear bond strength of lingual brackets on enamel surface submitted to acid-etching or Nd:YAG laser irradiation. In: LASER DENTISTRY WORLD CONGRESS, 16th; DGL ANNUAL MEETING, 27th; INTERNATIONAL WALED CONGRESS, 6th, October 1-3, 2018, Aachen, Germany. Abstract... Aachen, Germany: International Society for Laser Dentistry, 2018. p. 82-82. Disponível em: http://repositorio.ipen.br/handle/123456789/32771. Acesso em: 29 Apr 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.