Effect of sonic oscillation on penetration and marginal adaptation of filled-resin-based fissure sealants.

Objectives: To evaluate the effect of sonic oscillation on penetration depth and marginal adaptation of resin-based fissure sealants.

Method And Materials: Thirty-six extracted human third molars were randomized into three groups: in the HF group, teeth were sealed with a filled-resin-based sealant (Helioseal F); in the Sonic-HF group, teeth were sealed with Helioseal F and subjected to sonic oscillation (Compothixo Device, 140 Hz vibration frequency and ± 150 µm amplitude) before curing; in the CO group, teeth were sealed with an unfilled-resin-based sealant (Clinpro). All teeth were thermocycled for 1,500 cycles at 5°C and 55°C, then sectioned buccolingually into four sections (mesial, two middle, and distal).

The impact of silver nanoparticles integration on biofilm formation and mechanical properties of glass ionomer cement.

Objectives: To study the effect of silver nanoparticles incorporation to glass ionomer cement (GIC) on the Staphylococcus aureus biofilm in terms of bacterial growth and evaluate the incorporating effect on hardness and compressive strength.

Methods: Silver nanopowder was added in concentration 0, 1, 3, and 5 wt% to the conventional powder of GIC Fuji IX GP and then the powder is added to the liquid and mixed together with the recommended Powder/liquid ratio of 3.6:1 g.

Apoptotic effect of different self-etch dental adhesives on odontoblasts in cell cultures.

Objectives: We aimed to evaluate the potential cytotoxicity (apoptosis-induction) of three types of self-etch dental adhesives: two-component one-step (Xeno III), two-component two-steps (Clearfil Protect Bond) and one-component one-step (Xeno V) on cultured odontoblasts.

Methods: Each adhesive was prepared to simulate its clinical manipulation. Cured sterile individual masses were immersed in DMEM and left at 37 °C for 24 h.

Bonding of single-component adhesives to dentin following chemomechanical caries removal.

Purpose: To determine the effect of chemomechanical caries removal on the bonding quality of contemporary single-component adhesives to dentin.

Materials And Methods: N-monochloro-DL-2-aminobutyrate solution (NMAB) and Carisolv gel were used to chemomechanically remove dentin caries in 60 extracted human molars. Caries removal with rotating instruments served as the control.