[Fiber reinforced composite posts: literature review].

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Fiber-reinforced composite (FRC) posts, particularly carbon fiber posts, have been utilized since the 1990s for restoring endodontically treated teeth with insufficient coronal structure.
• FRC posts are favored over prefabricated and cast metal posts, especially in narrow root canals, due to reduced risk of vertical root fracture.

Purpose of the Study:

• To evaluate factors influencing the bond strength and retention of FRC posts in endodontically treated teeth.
• To compare different adhesive strategies and surface treatments for FRC posts.

Main Methods:

• Review of in vitro and in vivo studies on FRC post cementation.
• Analysis of various surface treatments (sandblasting, acid etching) and adhesive systems (etch-and-rinse, self-etch, self-adhesive).
• Investigation of cementation timing, application methods, and resin cement film thickness.

Main Results:

• Debonding at the resin cement/dentin interface is the most common FRC failure mode.
• Etch-and-rinse adhesives combined with resin cements yield higher bond strength than self-adhesive cements.
• Optimized sandblasting (50 µm alumina, 2.5 bar, 5s, 30mm) enhances surface roughness without compromising post integrity.
• Delayed cementation (≥24h post-treatment) and controlled cement film thickness (≤0.3mm) significantly improve retentive strength.

Conclusions:

• Proper selection of FRC posts and meticulous adhesive cementation techniques are crucial for successful long-term restoration of endodontically treated teeth.
• Surface treatments and cementation protocols significantly impact FRC post retention and clinical performance.
• Core build-up materials should not be used as luting cements for FRC posts.