Back to AI Flashcard MakerNursing /BDS2 OSCE Prep - Dental Material OSCE
what is the composition of Amalgam?
POWDER: Ag (70%) Sn (25%) Cu (3%) Zn (1%) LIQUID: Hg (1%)
Tap or swipe ↕ to flip
Swipe ←→Navigate
1/31
Key Terms
Term
Definition
what is the composition of Amalgam?
POWDER: Ag (70%) Sn (25%) Cu (3%) Zn (1%) LIQUID: Hg (1%)
what is the composition of RMGI?
Fluro-alumino-silicate Glass + Barium Glass (powder) Potassium persulphate (powder) HEMA (liquid) Polyacrylic Acid (liquid) Tartaric Acid (liquid) Wat...
what is the composition of Composite Resin?
FILLER = (quartz, silica, borosilicate) RESIN = BIS-GMA + urethane dimethacrylate resin monomer PHOTOINITIATOR = Camphorquinone LOW WEIGHT DIMETHACRYL...
What is the composition of CaOH?
Calcium oxide and water
what is the composition of Vitapex?
CaOH Iodoform
what is Amalgam typically used for?
Restoration of medium to large sized posterior cavities
Related Flashcard Decks
Study Tips
- Press F to enter focus mode for distraction-free studying
- Review cards regularly to improve retention
- Try to recall the answer before flipping the card
- Share this deck with friends to study together
| Term | Definition |
|---|---|
what is the composition of Amalgam? | POWDER: Ag (70%) Sn (25%) Cu (3%) Zn (1%) LIQUID: Hg (1%) |
what is the composition of RMGI? | Fluro-alumino-silicate Glass + Barium Glass (powder) Potassium persulphate (powder) HEMA (liquid) Polyacrylic Acid (liquid) Tartaric Acid (liquid) Water (liquid) Photoinitiator (liquid) |
what is the composition of Composite Resin? | FILLER = (quartz, silica, borosilicate) RESIN = BIS-GMA + urethane dimethacrylate resin monomer PHOTOINITIATOR = Camphorquinone LOW WEIGHT DIMETHACRYLATE = TEGDMA SILANE COUPLING AGENT |
What is the composition of CaOH? | Calcium oxide and water |
what is the composition of Vitapex? | CaOH Iodoform |
what is Amalgam typically used for? | Restoration of medium to large sized posterior cavities |
what is RMGI typically used for? | Base or lining material Restoration of deciduous teeth Restoration of some permanent teeth |
what is Composite typically used for? | Restoration of small —> large cavities anywhere in mouth (good aesthetics) |
what is CaOH typically used for? | Lining material Pulp cap |
what is Vitapex typically used for? | To fill root canals after paediatric pulpectomy |
what are the components of the BASE of CaOH? | calcium hydroxide (50%) zinc oxide (10% - filler) N-ethyl toluene sulphonamide (40%) zinc stearate (1%) |
what are the components of the CATALYST of CaOH? | butylene glycol disalicylate (40%) calcium sulphate (30%) calcium tungstate (15%) titanium dioxide (13-14%) |
what is Vitrebond? | RMGIC used as a lining |
what is Riva (capsule)? | RMGIC used for restorations |
what is Dycal? why is it used? | a setting CaOH liner - normally used as a pulp cap |
CaOH is an irritant, why is this good? | High pH (kills microbes) Causes irritation to odontoblast layer, this results in tertiary dentine being made, this calcified bridge helps seal off the pulp |
what is Ultracal? | a non-setting CaOH |
what is ultra cal used for? | when performing a pulpotomy, ultracal can be used to temporarily fill canals |
what is the composition of Conventional GIC? | Polyacrylic acid Tartaric acid Silicate glass Alumina Calcium fluoride (calciumfluoroaluminasilicate glass) |
what are the steps of the setting reaction of GIC? Explain each in simple terms: | Dissolution = H+ ions attack surface of glass particles Gelation = inefficient Ca cross links form to create calcium polyacrylate chains Hardening = aluminium polyacrylate chains are formed |
why must the environment be kept dry during setting of GIC? | water causes the Al to leak out and weaken the bond |
what are the steps of tri-curing in the RMGIC setting reaction? | initial acid-base setting reaction SAME as conventional GIC the REDOX reaction begins (this causes setting in the dark) light activation causes free radical reaction to occur resulting in resin matrix formation |
what is the setting reaction of ZOE? | An acid base reaction - chelation reaction of zinc oxide with the eugenol to form a zinc eugenolate matrix which bonds to the unreacted ZnO particles |
how strong is conventional ZOE? | Low strength = 20MPa |
why is conventional ZOE not used as a cavity lining? | low compressive strength |
how does resin modified ZOE differ from conventional ZOE? | resins are added to the powder and liquid | - has an increased strength of 40MPa |
how does ethoxybenzoic acid ZOE differ from conventional and resin modified ZOE? | higher strength of 60MPa and lower solubility |
what is the gamma phase in the amalgam setting reaction? | Ag3Sn |
what is the Gamma 1 phase in the amalgam setting reaction? | Ag2Hg3 |
what is the gamma 2 phase in the amalgam setting reaction? | Sn7Hg |
what is the amalgam setting reaction? | Ag3Sn + Hg —> Ag3Sn + Ag2Hg3 + Sn7Hg |