Study on composite resin cores. Part 2. Effect of pressing composite resin
In this study, we investigated effects of pressing in building composite resin cores on compressive strength, retention of prefabricated post and sealing ability. 1. Compressive strength increased by pressing in composite resin cores. 2. Prefabricated post to the retentive forces was not influenced by pressing, but increased when bonding agent was used. 3. Pressing was very effective to improve sealing ability of composite resin to tooth structure. 4. Sealing ability of light-cured composite resin was not influenced by pressing but by curing types of bonding agent.
Abstract The physicochemically derived swelling stress in articular cartilage plays a crucial role in determining the pattern of stress sharing between the exudable fluid and the ‘solid’ components comprising its matrix. This pattern of stress sharing in turn influences the manner in which cartilage consolidates or deforms in compression via the outflow of fluid. Synthetic hydrogels exposed to a variety of cationic blocking solutions provide simplified model systems for exploring quantitatively the influence of the intrinsic swelling parameter on consolidation behaviour, thus yielding further insights into the fundamental parameters controlling the biomechanical properties of complex tissues such as articular cartilage.