Shrinkage stress of resin composites: Effect of material composition – Sistematic Review

Abstract

<p>The longevity of resin, depends on its binding between the margin of restorations and the polymer, and one factor that influences this aspect is the shrinkage stress, so the working group makes the following systematic review which looks at the influence of the composite resin composition of the shrinkage stress.</p>

Bulk-Fill Resin-Based Composites

“…Composite resin is the material with the broadest application in restorative dentistry due to its optic and physic properties being very similar to the natural dental tissue, in order to re-establish dental function, form and aesthetic [1,2]. The material presents as its principal characteristic adhesion to the dental structure, avoiding further damage to the dental tissue, however, it presents as disadvantages a strong polymerization contraction stress, with risk of causing marginal gap and staining, microinfiltration, post-procedure sensibility, secondary caries and cusp fracture, characterising a bad prognostic [3][4][5][6]. With that in mind, the technology industry developed bulk-fill low-polymerization contraction resins, which permit the insertion of larger quantities of resins and a shorter photopolymerization time.…”

Effect of Preheating on Microleakage and Microhardness of Composite Resin (An in Vitro Study)

“…The most common drawbacks are shrinkage during polymerization, thermal expansion, marginal leakage and recurrent caries. Also A high viscosity and stickiness of the highly filled composite make insertion and adaptation of the material to the cavity preparation walls difficult (1)(2)(3).…”