Climate change is intensifying the hydrologic cycle and is expected to increase the frequency of extreme wet and dry years. Beyond precipitation amount, extreme wet and dry years may differ in other ways, such as the number of precipitation events, event size, and the time between events. We assessed 1614 long-term (100 year) precipitation records from around the world to identify key attribute...

This study was designed to determine if avulsed permanent incisors which have been kept dry for a period and then immersed in an isotonic solution prior to implantation have an increased healing rate. The permanent maxillary incisors of six beagle dogs were grouped by lot in six treatment classes so that each type of incisor was included in each class. After extraction, the teeth of a treatment...

The present study is focused on investigating the mechanical properties of hybrid polymer composites. reinforcement materials are animal bone (ox) particulate and E-glass fiber. matrix material epoxy resin. following combinations considered for investigation: (a) weight percent (20%, 30%, 40%), (b) fiber (c) (10%, 20%, 30%) (30%, 10%) with resin 60% by percent. test specimens prepared as per re...

PURPOSE The purpose of this study was to assess the effect of surface treatments on shear bond strength of resin composite bonded to thermocycled and non-thermocycled CAD/CAM resin-ceramic hybrid materials. MATERIALS AND METHODS 120 specimens (10×10×2 mm) from each material were divided into 12 groups according to different surface treatments in combination with thermal aging procedures. Surf...

Objectives This study aimed to assess the effect of wet and dry finishing and polishing on microhardness and roughness of microhybrid and nanohybrid composites. Materials and Methods Thirty samples were fabricated of each of the Polofil Supra and Aelite Aesthetic All-Purpose Body microhybrid and Grandio and Aelite Aesthetic Enamel nanohybrid composite resins. Each group (n=30) was divided int...

in modern pharmacological medicine, saffron is used for various purposes due to its antioxidant effect. this study evaluated retinal function after treatment with saffron supplementation during a follow-up period of 6 months to provide further insight into the efficacy and safety considerations of this treatment. sixty patients with wet or dry age-related macular degeneration (amd) were randoml...

STATEMENT OF PROBLEM Resin composites are brittle materials and their major shortcomings are manifested in their sensitivity to flaws and defects. Although various mechanical properties of resin composites have been described, few studies are available on assessing the effect of bleaching agents on resin composites using the short rod design. PURPOSE To place various resin composites into dis...

The novel quaternary ammonium bromide (QAB)containing oligomers were synthesized and applied for developing an antibacterial resin composite. Compressive strength (CS) and S. mutans (an oral bacteria strain) viability were used to evaluate the mechanical strength and antibacterial activity of the formed composites. All the QAB-modified resin composites showed significant antibacterial activity ...