Chapter 17: Polymers for Prosthetic Dentistry Flashcards
Long-chain, high molecular weight molecules produces by chemically linking many low molecular weight monomer molecules
Polymers
Low molecular weight molecules that are joined to form polymers; as used in dentistry. Usually liquid.
Monomers
The act of forming polymers by chemically linking monomers into long chains; the process can be activated by chemicals, heat or light.
Polymerization
Adjacent long-chain polymers joined by the bonding of short chains along their sides to enhance the properties of the polymer.
Cross-Linked Polymers
Common form of polymerization for dental materials; monomer molecules are added one to another sequentially as the reactive group on one molecule initiates bonding with an adjacent monomer molecule and frees another reactive group to repeat the process.
Addition Polymerization
A reactive group on one end of a monomer that initiates the joining of adjacent monomer molecules to form a polymer.
Free Radical
A polymer composed of numerous methyl methacrylate monomers linked together into a long chain. Commonly used in denture fabrication.
Poly(Methyl Methacrylate) (PMMA)
Liquid added to acrylic resin to soften it and make it more pliable
Plasticizer
Numerous microscopic holes or voids within a material; often caused during polymerization of resins when monomer vaporized and is lost; can also be caused by entrapping of air during mixing of powder and liquid
Porosity
A device used fro the replacement of missing tissues. It can serve both cosmetic and functional roles
Prosthesis
A soft liner that is used in patients who have problems with hard acrylic denture bases; it is expected to last for 1 to 3 years
Long-Term Soft Liner
A soft provisional liner used to improve tissue health; also called a tissue conditioner; typically, it lasts from a few days to a few weeks.
Short-Term Soft Liner
A rigid reline material used inside a denture to improve the fit and stability
Hard Liner
