Effects of different desensitizing treatments on root dentin permeability

Abstract

The objective of this study was to evaluate the effects of diode laser and a desensitizing dentifrice on dentin permeability. Fifty-two root dentin fragments were obtained (5 × 5mm) and treated with 24% EDTA gel. The samples were divided into 4 groups (n = 13): G1, control (no treatment); G2, diode laser (λ = 908 nm, 1.5 W, continuous mode, 20s); G3, application of abrasive dentifrice for 1 minute (Elmex Sensitive Professional (International Gaba); and G4, application of abrasive dentifrice for 1 minute followed by irradiation with diode laser. Ten samples per group were immersed in 2% methylene blue solution for 4h. The specimens were washed, longitudinally sectioned, observed under optical microscopy, photographed and assessed based on the degree of dye leakage. The remaining samples were observed under scanning electron microscopy (SEM). The leakage data were subjected to ANOVA test, followed by Tukey's t-test (α = 5%). Groups 2, 3 and 4 showed less dye penetration than the control group (p < 0.05), but were similar among each other. SEM images showed that dentinal tubules were open in G1, and fused and occluded in G2. Group 3 showed dentinal tubules that were occluded by the metal ions from the toothpaste. G4 presented similar characteristics to G3, and the presence of fused dentin. The diode laser and the dentifrice were effective in reducing dentinal permeability, and the combination of the two treatments did not show better results than either one used alone.

The Effect of Eggshell and Seashell Nanoparticles Alone and Combined With Nd: YAG Laser on Occlusion and Remineralization Potential of Patent Dentinal Tubules: An In Vitro Study

“…This fact is in accordance with a previous study, which concluded that the diode laser and dentifrice containing both arginine and CaCO 3 were effective in reducing dentinal permeability, and the combination of the two treatments did not show better results than either one used alone. 38 This can be supported by a previous study, in which the combination therapy of the acidulated phosphate fluoride gel and Nd: YAG laser did not promote an additional effect. 39 On the other hand, the literature contradicts a previous study that reported an effective treatment regimen for dentin hypersensitivity by applying nanohydroxyapatite combined with Nd:YAG laser as a desensitizing agent.…”

Treatment outcome for dentin hypersensitivity with laser therapy: Systematic review and meta-analysis

“…22 The first mechanism of action of the high-power laser occurs by the obliteration of tubules through the partial fusion of dentin substrates. 6,23,24 The low-power laser decreases the chronic inflammatory process present in the cells, by activating the sodium and potassium pumps and obliterating dentin tubules through the formation of tertiary dentin, 25 and can promote analgesic, anti-inflammatory, and biomodulatory effects. 17,22 Laser treatment is well tolerated by patients and is considered safe, quick, and painless.…”

A comparative study on the effect of propolis and dentine bonding agent in treating dentine hypersensitivity

“…Therefore, successful treatment regimens are required which may produce immediate and long-term relief from DH and are also resistant to dietary acids and physical insult. 5 Adhesive restoration materials and dentinal adhesives are considered dentinal tubule sealers and are, therefore, used in DH treatment. Adhesive resin effectively seals the dentinal tubules by forming transitional hybrid layer which is an interface between dentine and adhesive resin.…”