Evaluation of intra root canal Er,Cr:YSGG laser irradiation on prosthetic post adherence
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Journal of Prosthodontics - Implant Esthetic and Reconstructive Dentistry
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Purpose: In clinical prosthetics procedures, including endodontics and post fixation,
the presence of a smear layer can reduce the post bond strength. An Er,Cr:YSGG
laser, which emits at 2780 nm, can promote a smear-layer-free surface due to the
ablation process. Considering these aspects, the purpose of this work was to evaluate
the influence of Er,Cr:YSGG laser irradiation using either a radial or an axial fiber tip
on the bond strength of three resin cements to the fiber-reinforced composite posts.
Materials and Methods: Ninety recently extracted single rooted human teeth had
their root canal instrumented and were randomly distributed into nine experimental
groups, in which three resin cements (total-etching Variolink II, self-etching Panavia
F, and self-adhesive RelyX Unicem Aplicap) and three root canal treatments (no
treatment, laser irradiation using the radial fiber tip, laser irradiation using the axial
fiber tip) were used. Specimens were then sectioned into three sections (cervical,
middle, and apical thirds) with two slices on each section. A push-out test was
performed on each slice, and the values were recorded as MPa. The push-out data
were analyzed by a Ryan-Joiner normality test followed by a two-way ANOVA test
and Tukey pairwise comparison. The statistical analysis was performed on each third
section separately, with a 5% significance level.
Results: Laser irradiation with axial fiber tip significantly increased the post bond
strength of RelyX Unicem Aplicap on middle third of specimens (p < 0.001) when
compared to other root canal treatments (unlased or irradiated with radial tip). Considering
the Panavia resin cement, laser irradiation with either axial or radial tips
promoted a significant increase on the post bond strength of middle third when compared
to unlased specimens (p < 0.001); however, laser irradiation did not influence
the post bond strength of Variolink resin cement.
Conclusions: The use of the Er,Cr:YSGG laser for clinical prosthetics procedures
enhances the post bond strength of Panavia and RelyX Unicem Aplicap resin cements,
mainly at middle third of roots, and does not interfere with the bond strength of
Variolink resin cement. For the RelyX Unicem Aplicap system, the use of axial tip is
most advantageous and can be recommended for future clinical application.
Como referenciar
QUINTO JUNIOR, JOSE; AMARAL, MARCELLO M.; FRANCCI, CARLOS E.; ANA, PATRICIA A.; MORITZ, ANDREAS; ZEZELL, DENISE M. Evaluation of intra root canal Er,Cr:YSGG laser irradiation on prosthetic post adherence. Journal of Prosthodontics - Implant Esthetic and Reconstructive Dentistry, v. 28, n. 1, p. e181-e185, 2019. DOI: 10.1111/jopr.12609. Disponível em: http://repositorio.ipen.br/handle/123456789/30427. Acesso em: 30 Dec 2025.
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.