Occlusal Consideration Flashcards
t/f: the original Palodent is more useful with small composite preparations
like this one than with amalgam.
true
A BIG DRAWBACK OF THE ORIGINAL PALODENT IS THAT IT DOESN’T ALLOW______. ALL SECTIONAL MATRICES REQUIRE A RUBBER DAM FOR SAFETY, IN CASE A RING BREAKS OR FLIES OFF.
WEDGING
A type of sectional matrix: Three different choices of concave-convex bands , to
be held in place by one of the ring clamps.
the original palodent system
Another SECTIONAL MATRIX system, Palodent Plus
has four choices of band and two choices of ring
clamp.
The palodent Plus
The _____ ______ system provides a set of pinned pliers
that engage holes in the band, for use in manipulating the
band, both at placement time and when removing it.
Palodent Plus
The Palodent Plus system allows a wedge to be placed_____ the ring clamp is seated.
before
T/F the T band is mostly used in pedodontics.
true
What are two matirx options for used on a severely damaged tooth?
The copper band matrix and the AUTOMATRIX SYSTEM
1. Insert Tightening Wrench into “Scroll” of Band Material 2. Tighten “Scroll” by Rotating Handle of Wrench Clockwise 3. Bend the “Scroll” Portion Sideways Around the Clip to Stabilize Tightness
THE AUTOMATRIX SYSTEM–INSTALLATION
- Be Sure the Plastic Trap is in Place on the Removal Tool, and Snip off the Top of the Retaining Clip.
- Remove the Rest of the Clip
Apically and Remove Band
THE AUTOMATRIX SYSTEM—
REMOVAL AFTER AMALGAM PLACEMENT
Which matrix must be held in place by your nondominant hand when there are no
undercuts on the side walls of the tooth (as when tooth has been
prepared for a crown).
THE AUTOMATRIX SYSTEM
T/F: THE AUTOMATRIX SYSTEM Doesn’t work well when tooth defects
go far apically
True
- Select a band of the proper
diameter. It will not fit
down all the way until it
has been adjusted. - Use the crown and bridge scissors .
Festoon the gingival margin of the band
until it follows the general outline of the
gingival attachment to the tooth. - The band fits down
well now , but still
sticks up too far. - Use the scissors to trim the top of the band so it
only sticks up a millimeter or two above adjacent
teeth. Note the use of the nail of the non-dominant
hand to stabilize the band while packing amalgam.
THE COPPER BAND—ADAPTATION TO THE TOOTH
t/ F: Because of the stiffness and thickness of the copper band, it is useful primarily on teeth already prepared for crowns.
True contact with neighboring teeth is nearly impossible to
obtain with a copper band matrix.
true
____ ____ ____ must be stabilized with your non-dominant hand while
packing amalgam, or when cutting the band for removal.
THE COPPER BAND MATRIX—
T/ F: Copper bands are subject to strain hardening if you “work”
the metal very much.
true
Occlusion is both____ and____ (maximum
intercuspation + lateral & protrusive movements)
static and dynamic
t/f: Although the masticatory system is highly adaptable,
many patients are highly sensitive to abrupt changes
in tooth contacts brought about by restorations.
true
Four inclines are present on all cusps: What are they?
facial,
lingual, mesial and distal
The fossa is relatively shallow, so that a point of
occlusion can fall at its___ point, directly over the
central pit in maximum intercuspation.
lowest point (ideal fossa form)
The fossa is
relatively open_______, so that there are no inclined
plane contacts in maximum intercuspation.
laterally (ideal fossa form)
The ____ ____ lie somewhat horizontally &
suspend the tooth root in its alveolar socket,
converting forces down the long axis of the root into
tension applied to the bony alveolar wall.
Sharpey’s fibers
Bone tends to be resorbed in areas of ____ and
strengthened or enhanced in areas of_____.
compression
tension
t/f: The ideal occlusion in maximum intercuspation finds occlusal contacts at the tips of cusps in one arch occluding with cusp seats at the bottom of fossae or at the crests of marginal ridges (or--less ideally-- on some plateau perpendicular to the long axes of the teeth)
true
