Effect of Nd:YAG laser and aluminum oxide sandblasting preconditioning on lingual enamel
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2019
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EUROPEAN CONFERENCES ON BIOMEDICAL OPTICS
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It is known that Nd:YAG laser radiation on dental structure can increase enamel resistance to demineralization; however,
few studies report its impact in orthodontics. This study aimed to verify the interaction of Nd:YAG laser and aluminum
oxide sandblasting (Al2O3) as preconditioning treatment of lingual brackets bonding to quantify the shear bond strength
(SBS) and to characterize the enamel after different surface preconditioning techniques. Thirty-five bovines’ incisors
were divided in 5 groups (n=7), according to the preconditioning. All groups had the lingual brackets bonded with
Transbond XT adhesive according to manufacturer’ protocol, and shear bonded after 72h. Samples were analyzed by
Optical Coherence Tomography (OCT) and Scanning Eletronic Microscope (SEM) to verify enamel alterations. Optical
attenuation coefficient (α) was measured before any preconditioning (T0) and after preconditioning surface (T1) for each
group. Statistics analysis ANOVA-test was used, followed by Post Hoc Tukey for shear bond strength data, and Kruskal
Wallis and post hoc Dunn test for α data. SEM and OCT qualitative analysis showed the melting effect with laser
irradiation and enamel crystal surface disorganization with sandblasting in T1 and after shear bond. All groups were
adequate for SBS and the statistical differences (p=0.0034) among groups showed better results for groups with
techniques association (laser and Al2O3 used in this or in reverse order) and the highest SBS when laser was used after.
The Al2O3 removes part of melting effect. The α had statistical difference (p= 0.0124) among groups, increasing with
laser and Al2O3 isolated and decrease with techniques association.
Como referenciar
LOPES, MONICA S.; MOTA, CLAUDIA C.B.O.; PEREIRA, DAISA L.; AMARAL, MARCELLO M.; ZEZELL, DENISE M.; GOMES, ANDERSON S.L. Effect of Nd:YAG laser and aluminum oxide sandblasting preconditioning on lingual enamel: brackets shear bond strength and morphological characterization. In: WOJTKOWSKI, MACIEJ (ed.); BOPPART, STEPHEN A. (ed.); OH, WANG-YUHL (ed.). In: EUROPEAN CONFERENCES ON BIOMEDICAL OPTICS, June 23-27, 2019, Munich, Germany. Proceedings... Bellingham, WA, USA: SPIE, 2019. p. 1107822-1 - 1107822-3. (Proceedings of SPIE-OSA Vol. 11078, Optical Coherence Imaging Techniques and Imaging in Scattering Media III). DOI: 10.1117/12.2527030. Disponível em: http://repositorio.ipen.br/handle/123456789/30967. Acesso em: 20 Mar 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.