Fiber-reinforced composites in fixed prosthodontics—Quo vadis?

Abstract

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Scanning electron microscopy assessment of the load-bearing capacity of cad/cam-fabricated molar crowns

“…Recently, FRC fixed partial dentures have been identified as the definitive treatment modality, having an expected survival time of at least 5-6 years, and providing adequate interocclusal space and high patient satisfaction at a low cost. 18 The fracture resistance of a clinical crown is affected by several factors, including the material, cementation, artificial aging, and loading conditions, as well as the elastic modulus of the supporting die. 32 Fracture resistance increases with increasing elastic modulus of the supporting material.…”

“…17 Within a structure, fibers can be unidirectional, bidirectional, braided, or woven. 18 Unidirectional fibers exhibit a similar diameter, have a circular cross-section, and are straight, tightly packed, and anisotropic; they also show a reinforcing effect when forces are applied perpendicularly to the direction of the fibers. However, bidirectional fibers exhibit an orthotropic reinforcing effect, i.e., they exert reinforcing effects in two directions, and thus improve structural strength.…”

“…However, bidirectional fibers exhibit an orthotropic reinforcing effect, i.e., they exert reinforcing effects in two directions, and thus improve structural strength. 18 Discontinuous FRCs have been improved in terms of toughness. 18 The behaviors of randomly oriented discontinuous fibers are affected by the fiber volume fraction.…”

“…18 Discontinuous FRCs have been improved in terms of toughness. 18 The behaviors of randomly oriented discontinuous fibers are affected by the fiber volume fraction. If fibers are randomly and homogenously oriented, they show isotropic properties; however, if they have sufficient length, they demonstrate anisotropic properties similar to those of long fibers.…”

From body‐on‐frame to unibody constructions and designs mimicking biological structures – an overview

“…These have typically been focused on applications for which there is need to replace missing teeth or severely damaged parts of teeth (23)(24)(25)(26)(27)(28)(29). The rationale behind the use of FRCs lies in minimal invasiveness and adhesively bonded restorations that can result in the definitive fixed prosthetic device using one dental appointment only (30). When they are properly adhered to teeth, FRC constructions are unibody constructions.…”