Q&A Flashcards
round burs
1/2 1/4 2 4 6 8
inverted cones
33 1/2, 34 , 35
Straight (50s)
56, 57, 58
Tapered fissure
69
70
cross cut straight fissure burs
556
557
cross cut tapered fissure burs
700, 701 702
holes punched too close
leaking undue pressue on the papillae
too far apart
bunching
leaking & interfering w/access & visibility
used & must stabilized with compound in order to prevent slippage or tissue laceration
212 clamp / retractor
chemical frequently used is an astringent
ALUM
remaining dental thickness
2mm
Adverse pulpal reaction deep cavity preparation
Silicate cement
Throbbing pain in a specific tooth which is sensitive to pressure & when the pain is aggravated by heat relieved by cold
Suppurative Pulpitis
controlled by the extent that the enamel has been directly penetrated by the caries by the lateral spreas of caries along DEJ
Outline
withstand the stress being places upon it by occlusion without dislodged.Flat pulpal walls, parallelism of opposing walls
Resistsnce
Hold the restoration in position generally accomplished by proximal retentive grooeve
Retention
Final step pf cleansing / toilet cavity
Remove all the debris
resist displacement of the restoration in any direction & reduction of cusps
Retention form
Placing gingival bevel
Margin trimmer
Tapered carbide burs
Fine tapered diamond stones
Class 3 cavities which helps to insure the proper line of force for Condensation of direct filling gold
Convenience
Retention form for a Class II amalgam preparation achieved by
Facial & Lingual grooves placed at the axial line angle
3 types of pin
Cemented
Threaded
Friction Lock
create a great deal of stress within the tooth
Friction Locl
Most generally accepted
Cemented
Threaded
Tipping the cusps for a complex amalgam restoration
2-3mm
Porcelain bonded to metal restorations should have
Beveled shoulder- labial surface
Chamfer - lingual
70% amalgam alloy , improves strength & decreases flow
Silver
26% redcues the expansion & also cut down on the strength & hardness of the resultant alloy
Tin- brittle reducing expansion& hardness
scavenger to deoxidize
Zinc
comprise bullk
Filler
initiator which alloys ultraviolet light to be utilized as an activator rather than a tertiary amine type of chemical
Benzoin Methyl Ether
gold alloys increases strength & hardness
Copper
used to harden the alloy & palladium less expensive
Platinum
provide for the lateral setting & thermal expansion of the investment which compensates for the casting shrinkage of the gold
Asbestos
primarily utilized as luting agent for the cementation of gold restoration
Zinc Phosphate
Polycarboxylate
base of choice since it act as a mild irritant & stimulates the odontoblast to form secondary dentin, dentin bridge formation
CaOh
least irritating frequently used as temporary restorations or thermoinsulating base
ZOE - pulpal sedation
improve marginal seal & reduce tooth discoloration
Cavity varnishes
contraindicated as base under resin restoration
ZOE