Light curing infection control barriers: do some types jeopardize the concept of conventional bulk-fill composites?

Background: Using infection control barriers (ICBs) on light curing units (LCUs) became mandatory to achieve proper infection control measures without jeopardizing the integrity of the restorations, especially at deeper layers. This study explored the effect of two ICBs on the irradiance of the LCU, as well as the degree of conversion (DC) and flexural strength (FS) of two types of bulk-fill composites. Water vapor permeability (WVP) of both barriers was also assessed to evaluate the capability of such barriers to prevent transmission of blood and saliva droplets and aerosols.

Assessment of physical properties of bioactive glass-modified universal multimode adhesive and its bonding potential to artificially induced caries affected dentin.

Background: To evaluate the physical properties of bioactive glass-modified universal multimode adhesive and its micro-tensile bond strength (µTBS) to artificially induced caries-affected dentin.

Methods: All bond universal adhesive was used in the study. Specimens were divided into 2 main groups: control unmodified adhesive and 5 wt% BAG modified adhesive.

Effect of silanization of poly (urea-formaldehyde) microcapsules on the flexural strength and self-healing efficiency of an experimental self-healing dental resin composite (An in-vitro study).

Objectives: This study investigated the impact of using γ-methacryloxypropyl trimethoxy silane (MPS) for surface silanization of poly (urea-formaldehyde) (PUF) microcapsules which enclose a healing liquid of "triethylene glycol dimethacrylate (TEGDMA) and N,N dihydroxyethyl-p-toluidine (DHEPT)" on some mechanical properties of an experimental dental composite as well as its self-healing efficiency.

Methods: Synthesis of PUF microcapsules was done via in situ polymerization, followed by silanization with MPS silane. Silanized and non-silanized microcapsules were incorporated into a composite containing 30% polymer matrix and 70% fillers at different weight percentages (0%, 5%, 7.

Change in surface properties of two different dental resin composites after using various beverages and brushing.

Background: The study aimed to evaluate the influence of various beverages; with and without brushing; on the surface mechanical properties of two resin composites.

Methods: A total of 160 disc-shaped specimens were prepared for each of the following dental composites; nanohybrid ormocer (Admira fusion, VOCO GmbH, Cuxhaven, Germany) and nanohybrid resin composite (Grandio, VOCO GmbH, Cuxhaven, Germany). The baseline surface hardness and roughness measurements were carried out after 24 h.

Evaluation of the pH, calcium ion release, and antibacterial effect of a premixed bioceramic endodontic sealer.

This study sought to compare a bioceramic sealer (TotalFill) and a calcium hydroxide (Ca[OH]) sealer (Sealapex) in terms of their pH, calcium ion (Ca²⁺) release, and antibacterial effect against Enterococcus faecalis bacteria. For the pH and Ca²⁺ release tests, 20 polyethylene tubes (10 mm in height and 1 mm in internal diameter) were filled with the appropriate sealer (n = 10 per sealer), immersed in glass flasks each containing 10 mL of deionized water, and stored in an incubator at 37°C. The water was changed after 1, 7, 28, and 90 days.

Mechanical properties and bonding potential of partially stabilized zirconia treated with different chemomechanical treatments.

Purpose: To evaluate the effect of different chemomechanical surface treatments of zirconia on fracture toughness, flexural strength, bond strength of zirconia to composite cement, surface topography, and phase transformation.

Materials And Methods: Pre-sintered yttrium-stabilized zirconium oxide blocks (in Coris ZI) were used. Specimens were prepared using a milling machine (Cerec InLab).