English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Trevelin LT. Effect of Er:YAG (SSP) laser pulse widths on dentin morphological analysis [dissertation]. São Paulo: Universidade de São Paulo, Faculdade de Odontologia; 2015.Versão Corrigida This study evaluated the morphological characteristics of Er:YAG laser irradiated dentin using different temporal pulses width on the protocols of cavity preparation and dentin pretreatment. Eighteen human molars were cut longitudinally in a mesiodistal direction and amelocemental junction providing dentin disks. Samples were polished in a decreasing silicon carbide paper to obtain standard 2mm thick disks. The experimental groups were divided by two variables: 1) clinical protocol – cavity preparation (E=200mJ/20Hz) and pretreatment (E=80mJ/2Hz); and 2) temporal pulse width – 50, 300 and 600μs. Therefore, six experimental groups were (n=3): G1(E=200mJ/20Hz/50μs); G2(E=200mJ/20Hz/300μs); G3(E=200mJ/20Hz/600μs); G4(E=80mJ/2Hz/50μs); G5(E=80mJ/2Hz/300μs); and G6(E=80mJ/2Hz/600μs). The samples were irradiated with the Er.YAG laser using wave-length of 2.94μm, in a non contact mode at a focal distance of 7mm from the target point under continuous water spray of 60-40ml/min. After the irradiation, the samples were processed and evaluated by scanning electron microscopic evaluation (SEM). The morphological analysis on the irradiated groups showed an irregular dentin surface, without smear layer, exposed dentinal tubules apertures, evidenced peritubular dentin, without carbonization and melting signs for all groups. A microretentive morphological pattern, characteristic of the ablation process could be observed in all groups. However, groups G1 and G4, that used 50μs of temporal pulse width, presented a greater irregularity when compared to other groups. In conclusion, the temporal pulse width interfere on the morphological characteristic of the irradiated dentin, regardless of clinical protocol, cavity preparation and pretreatment. The shorter the pulse width (50μs), the greater the surface irregularity.

Análise morfológica da dentina irradiada pelo laser de Er:YAG (SSP) com diferentes larguras de pulso