Impact of different polishing and aging procedures on the surface characteristics of bulk-fill resin composites
Hande FİLİZ | Ayşe Tuğba ERTÜRK AVUNDUK
Background: The aim of this study was to investigate the effects of different polishing systems and artificial aging procedures on the surface roughness, gloss, and microhardness of conventional and bulk-fill resin composites.Methods One nanohybrid resin composite [Clearfil Majesty Esthetic (CME)] and three bulk-fill resin composites [SonicFill (SF), Opus APS (O-APS), and FiltekTM Bulk-Fill (FBF)] were evaluated. Ninety specimens were prepared for each material and subjected to 3 polishing protocols [Mylar strip (control), OneGloss, and OptiDisc]. Following polishing, the specimens underwent 3 different aging procedures: distilled water storage, thermocycling, and ultraviolet (UV ) aging. Measurements for surface roughness (Ra), gloss (GU), and Vickers microhardness (VHN) were recorded at ...
Shear bond strength of calcium silicate-based cements to glass ionomers
Aksu, Seckin
Background A shear bond strength between the biomaterial and restorative material is crucial for minimizing bacterial microleakage and ensuring a favorable long-term prognosis for vital pulp therapy. This study aimed to conduct a comparative evaluation of the shear bond strength between calcium silicate-based biomaterials utilized in vital pulp treatment and various glass ionomer cement materials, both with and without the application of adhesive agents. Methods A total of 270 acrylic blocks, each featuring cavities measuring 4 mm in diameter and 2 mm in depth, were prepared. Calcium silicate-containing biomaterials (ProRoot MTA, Medcem Pure Portland Cement, and Medcem MTA), following manufacturers' instructions, were placed within the voids in the acrylic blocks and allowed to set fo...