In full dentures, porosity in the thickest area is due to which type of porosity?

In the context of full dentures, when discussing porosity in the thickest area, the most accurate classification is gaseous porosity. This type of porosity occurs when gases are trapped within the material during the curing or setting process, leading to voids that can compromise the integrity and aesthetics of the denture.

Gaseous porosity is typically a result of the materials used in denture fabrication releasing gases as they polymerize or set. If the denture material is not mixed properly or allowed to cure under optimal conditions, the gases can form bubbles or voids that become embedded in the thickest areas of the prosthesis. This can affect not only the strength and resilience of the denture but also its general appearance.

Other types of porosity like shrinkage porosity occur from the material contracting as it sets and solidifies, while surface porosity refers to tiny surface bubbles or imperfections that might not penetrate deeply but can affect the surface finish. Inadequate mixing porosity results from an improper blend of materials, leading to localized areas of insufficient material properties. However, in this scenario, the focus is on the thickest area, where gaseous entrapment is the primary concern.