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Composite restoratives, reinforcing

In vitro fracture resistance of fiber reinforced cusp-replacing composite restorations. Dent. Mater., 21, 565-572. [Pg.512]

Particulate reinforced polymer matrix composites are widely used in dentistry as esthetic restorative materials. Although the normally measured mechanical and physical properties of this class of materials approach the properties of dental amalgam (1) composite restorative materials exhibit limited durability in clinical service. Compared to amalgam restorations, composites undergo loss of material through wear processes and exhibit breakdown at the interfacial region between the restoration and tooth structure. [Pg.441]

In order to study the effect of physical aging on the carbon-fiber reinforced epoxy, the freshly quenched materials were then sub-Tg annealed at 140 °C. After annealing for only 10 minutes at that temperature, the toughness of the composite was restored to a level comparable to that of the postcured material (see Fig. 7). It is likely that residual thermal stresses resulted from the quenching were annealed away during this 10 minutes thermal aging at 140 °C. [Pg.136]

In the case of polymer-based materials, composites are often preferred because the mechanical properties of the pure polymer phase are inadequate for the proposed application [4]. To overcome this problan, polymeric materials are reinforced in some way, typically by incorporating a substantial amount of rigid filler. For some polymers, the problem may be that they lack the toughness required for a particular application, and for these materials, elastomeric fillers are used. These fillers have the effect of increasing toughness and the concomitant effect of reducing brittleness. However, this approach is not used for restorative dental materials. [Pg.37]

Dentistry. Biomechanical principles are relevant in orthodontic and dental science to provide solutions to restore dental health, resolve jaw pain, and manage cosmetic and orthodontic issues. The design of dental implants must incorporate an analysis of load bearing and stress transfer while maintaining the integrity of surrounding tissue and comfortable function for the patient. This work has lead to the development of new materials in dental practices such as reinforced composites rather than metal frameworks. [Pg.224]


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