OpTech Flashcards
purpose of wooden wedges
adapting matrix band
formation of contact point
amalgam carrier
carry amalgam from dappen pot to cavity
dental probe
caries detection
point focus
surface testing
retraction
carving instrument
carving amalgam
shaping composite
(kind of leaf shaped + flat)
burnisher
finishing amalgam restorations
manipulating composite
(rectangle shaped and rounded at nib)
excavator
caries evaluation and removal
material removal and manipulation
shaping and contouring restoratives
(diamond shaped and very thin side on view)
flat plastic
manipulation of filling materials
long and narrow at nib
2 types of tweezers
collage tweezers - criss cross handle
surgical tweezers - bar code handle
compules
contain highly filled bis-GMA resin and are placed in composite gun
condenser
condensing amalgam
manipulating composite
spatula
mixing materials - not resin / filler based cements and restoratives
meaning of band on bur
indicates diamond grit size
gold coloured coating on some instruments
zicronium nitride - used for wear protection especially on rotating instruments
matrix retainers
replacing cavity walls
moisture control
cavity margins
junction between walls of cavity preparation and external surface of tooth
cavosurface margin angle
angle formed at any point on the junction of a preparation with the unprepared surface of the tooth - should be 90 degrees in amalgam
line angles
line formed by junction of 2 surfaces of a prepared/unprepared surface
point angles
the angle formed by the junction of 3 surfaces
occlusal / pulpal floor
surface which is parallel to occlusal plane and overlies the pulp
gingival floor
a cavity surface in an approximal cavity which is parallel to the occlusal plane and bounded externally by the gingival margin
pulpal axial wall
cavity surface that is parallel to the long axis of the tooth
buccal / lingual axial wall
cavity surface which is bounded by cavosurface angle and cavity floor
isthmus
least wide part of the occlusal key cut in a proximal occlusal restoration as a retentive form
principles of cavity design
- identify and remove carious enamel
- remove enamel to identify the maximal extent of lesion at ADJ and smooth enamel margins
- progressively remove peripheral caries in dentine - from ADJ first and then circumferentially deeper
- only then remove caries from over the pulp with excavator or slow speed bur
- outline form modification - enamel finishing / occlusion / requirements of restorative material
- internal design modification - internal line and point angles / requirements of restorative material
