Clinical researchers have shown that sealing the margins of amalgam and composite restorations with unfilled resin will do what?

Sealing the margins of amalgam and composite restorations with unfilled resin has been shown to arrest the progression of caries. The application of unfilled resin at the margins serves as a protective barrier that can effectively seal any micro-gaps that may exist between the restoration and the tooth structure. This sealing action prevents the ingress of bacteria and fluids that could lead to secondary caries, thereby halting any existing carious processes around the restoration.

While sealing margins can improve aspects such as sensitivity and mechanical strength, the primary purpose and benefit of applying unfilled resin in this context focuses on its role in caries prevention. In addition, improving color match is often a concern with aesthetic restorations but is not directly related to the clinical benefits gained from sealing. By addressing the marginal integrity and limiting bacterial access, the sealing of restorations becomes an essential practice for maintaining dental health and prolonging the lifespan of restorative materials.