NEET MDS Shorts
94014
Dental Materials
Yield strength is the stress required to produce plastic deformation.
13282
Dental Materials
The condensation silicone impression materials are supplied as a base paste and a low-viscosity liquid catalyst (or a paste catalyst).
Putty is a high-viscosity material that has been developed in order to overcome the large polymerization shrinkage of the condensation silicone impression materials.
All the other impression materials are generally supplied as catalyst paste & base paste.
98253
Dental Materials
Ormocers have several advantages, including low shrinkage, excellent biocompatibility, and superior resistance to masticatory forces. These properties make them suitable for restorations that resemble natural teeth.
92451
Dental Materials
The accepted ratio of polymer to monomer for denture base resin is 3:1 volume, allowing sufficient wetting of the polymer particles.
20242
Dental Materials
Resin cements primarily achieve adhesion through micromechanical retention and chemical bonding.
42074
Dental Materials
The liquid phase of a denture base resin primarily consists of nonpolymerized methyl methacrylate (monomer) and a cross-linking agent like glycol dimethacrylate.
95664
Dental Materials
The setting time for gypsum products can range from a few minutes for impression plaster to up to 30 minutes for some dental stones, depending on the specific formulation and water to powder ratio.
30373
Dental MaterialsPhosphoric acid is used for etching enamel
33455
Dental MaterialsElgiloy arch wire is a Cobalt chromium nickel alloy
30817
Dental Materials
one ot the main adanhtges of GIC as a restoratie material was its ability to form chemical bonds with the tooth structure. Bonding in GIC primarily invokes chelation of carboxyl groups of the polyacids sith the calcium in the apatite of enamel and dentin. Bond rength of enamel is always greater than that of dentin due to higher mineral content. The bonding is improved by the removal of the debris layer called smear layer’ by a process called conditioning.