Abstract
Statement of problem
Laser phototherapy has been studied as a surface treatment capable of increasing the
adhesion of cement to the ceramic surface. However, the bond strength of glass and
resin-ceramics after laser phototherapy is unclear.
Purpose
The objective of this systematic review and meta-analysis was to compare the bond
strength of glass and resin-ceramics using laser therapy and conventional hydrofluoric
acid etching.
Material and methods
This systematic review and meta-analysis followed the Preferred Reporting Items for
Systematic Reviews and Meta-Analyses (PRISMA) and was registered in the Open Science
Framework (OSF) for in vitro studies. A population, intervention, control, and outcome
(PICO) question was formulated: “Does phototherapy promote better bond strength in
glass and resin-ceramics than conventional hydrofluoric acid etching?” A literature
search was performed in PubMed/MEDLINE, Embase, Web of Science, Scopus, Cochrane Library,
and ProQuest databases up to January 2023. The Joanna Briggs Institute critical assessment
guidelines for quasi-experimental studies were used for quality assessment. The meta-analysis
was based on the inverse variance (IV) method (α=.05).
Results
A total of 6 in vitro studies published between 2007 and 2019 with a total number
of 348 specimens were included for qualitative analysis; 1 study had a positive effect.
Five of the studies were included in the meta-analysis, which indicated a significant
decrease for feldspathic ceramics that received laser phototherapy and lithium disilicate
(P=.002; MD: −2.15; 95% CI: −3.53 to −0.77; I2=89%, P<.01) and (P<.01; MD: −2.13; 95% CI: −2.99 to −1.27; I2=82%, P<.01), respectively.
Conclusions
Laser irradiation as surface etching of glass ceramics does not produce a bond strength
equal to that of conventional hydrofluoric acid etching.
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Article info
Publication history
Published online: March 08, 2023
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2023 by the Editorial Council for the Journal of Prosthetic Dentistry.
