OPER 8120 Study Guide - Quiz Guide: Hydroquinone, Threading Building Blocks, Dentin

• School: University of Iowa
• Department: Operative Dentistry
• Course: OPER 8120
• Professor: Elgreatly

Document Summary

Inhibitors: prevent spontaneous polymerization and increases shelf life/working time, example: hydroquinone (mehq, bht) Other (color stabilizers, inhibitors, pigments: 3. recognize how the composition of rbc affects their physical and optical properties, handling characteristics and radiopacity of the material as a whole. Posterior restorations = intermediate opacity (one shade) Radiopacity: 4. explain why rbc should present radiopacity, 5. distinguishand compare the classification of rbc, 6. differentiate between microfills, hybrids, microhybrids, nanofills and nanohybrids in terms of properties, handling characteristics and clinical indications. Integration of a high concentration of nanoparticles to enhance mechanical properties and polishability. Particles individually silanized or clumped in clusters: reduced or no plucking of larger fillers, no lossa of gloss and good mechanical properties and better optical properties. Def: a solid that contains two or more distinct constituent materials or phases when considered at great than an atomic scale. *polymerization shrinkage: 2-5. 5%: complications: enamel cracks, marginal gaps, internal stress, and cusp deformation, microleakage of material, recurrent caries, increased sensitivity.