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Operative > Occlusal Consideration > Flashcards

Occlusal Consideration Flashcards

1
Q

t/f: the original Palodent is more useful with small composite preparations
like this one than with amalgam.

A

true

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2
Q

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.

A

WEDGING

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3
Q

A type of sectional matrix: Three different choices of concave-convex bands , to
be held in place by one of the ring clamps.

A

the original palodent system

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4
Q

Another SECTIONAL MATRIX system, Palodent Plus
has four choices of band and two choices of ring
clamp.

A

The palodent Plus

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5
Q

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.

A

Palodent Plus

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6
Q

The Palodent Plus system allows a wedge to be placed_____ the ring clamp is seated.

A

before

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7
Q

T/F the T band is mostly used in pedodontics.

A

true

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8
Q

What are two matirx options for used on a severely damaged tooth?

A

The copper band matrix and the AUTOMATRIX SYSTEM

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9
Q 
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
A

THE AUTOMATRIX SYSTEM–INSTALLATION

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10
Q
  1. Be Sure the Plastic Trap is in Place on the Removal Tool, and Snip off the Top of the Retaining Clip.
  2. Remove the Rest of the Clip
    Apically and Remove Band
A

THE AUTOMATRIX SYSTEM—

REMOVAL AFTER AMALGAM PLACEMENT

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11
Q

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).

A

THE AUTOMATRIX SYSTEM

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12
Q

T/F: THE AUTOMATRIX SYSTEM Doesn’t work well when tooth defects
go far apically

A

True

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13
Q
  1. Select a band of the proper
    diameter. It will not fit
    down all the way until it
    has been adjusted.
  2. 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.
  3. The band fits down
    well now , but still
    sticks up too far.
  4. 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.
A

THE COPPER BAND—ADAPTATION TO THE TOOTH

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14
Q

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.

A

true

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15
Q

____ ____ ____ must be stabilized with your non-dominant hand while
packing amalgam, or when cutting the band for removal.

A

THE COPPER BAND MATRIX—

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16
Q

T/ F: Copper bands are subject to strain hardening if you “work”
the metal very much.

A

true

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17
Q

Occlusion is both____ and____ (maximum

intercuspation + lateral & protrusive movements)

A

static and dynamic

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18
Q

t/f: Although the masticatory system is highly adaptable,
many patients are highly sensitive to abrupt changes
in tooth contacts brought about by restorations.

A

true

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19
Q

Four inclines are present on all cusps: What are they?

A

facial,

lingual, mesial and distal

20
Q

The fossa is relatively shallow, so that a point of
occlusion can fall at its___ point, directly over the
central pit in maximum intercuspation.

A

lowest point (ideal fossa form)

21
Q

The fossa is
relatively open_______, so that there are no inclined
plane contacts in maximum intercuspation.

A

laterally (ideal fossa form)

22
Q

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.

A

Sharpey’s fibers

23
Q

Bone tends to be resorbed in areas of ____ and

strengthened or enhanced in areas of_____.

A

compression

tension

24
Q 
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)
A

true

25
Q

ideal occlusion in maximum intercuspation puts the forces where??

A

the long

axes of the teeth. Teeth and their periodontal ligaments are best designed to absorb forces down the long axes

26
Q

Most of the time, the lingual
cusps of the maxillary and the
facial cusps of the mandibular
teeth are the____ cusps.

A

supporting

27
Q

Cusps that project beyond the

opposing teeth are called_____ cusps.

A

nonsupporting

28
Q

What two cusps are mostly likely non supporting cups.

A

Usually the facial cusps of the
maxillary and lingual cusps of the
mandibular

29
Q

t/f: IDEALLY, masticatory forces should be directed
parallel to the long axes of the posterior teeth in
maximum intercuspation

A

true dawg.

30
Q

t/f: Supporting cusps should not contact opposing
teeth in a manner which results in lateral
deflection of teeth.

A

true.

31
Q

Deflection of the mandible in maximum
intercuspation closure. (Possible TMJ
troubles).

• Trauma to supporting bone. Not
necessarily a cause of bone loss, but a
secondary contributing factor to bone loss in
periodontal disease.

• Forces which could eventually cause cracks
and fractures in the teeth.

• Trauma to the periapical tissues, which
could eventually cause sensitivity to pressure
and temperature, especially cold.

A

results of Contacts on inclined

planes in maximum intercuspation

32
Q

Do We Always Adjust Away Contacts
on Natural Tooth Structure That Don’t
Conform to the Text Book Ideal ?

A

no sir we do not.

33
Q

What are some Maximum Intercuspation Solutions When the Teeth Are Not Ideally Positioned?

A
  1. A cusp seat
  2. A reasonable solution is to make
    one tooth with pointed cusps, narrow buccolingually, and to flatten the cusp tips on the
    opposing tooth
  3. plateau
34
Q

When the mandible is moved laterally or in a protrusive or
lateral-protrusive direction, some teeth (at least one upper and one
lower) will be carrying the load. By necessity, the teeth doing this
function will be receiving forces on inclined planes that are not down
their long axes. Teeth that do this function are said to provide
guidance for the jaw, and by so doing, they relieve other teeth of
stress.

A

Guidance

35
Q

The side toward which the mandible is

moving.

A

Laterotrusive (working) side

36
Q

The side away

from which the mandible is moving.

A

Mediotrusive (non-working, or “balancing”) side:

37
Q

In general—due to leverage factors– it is better if guidance can occur on teeth further forward in the mouth,
especially on the cuspids, and if it can occur on the_____ side.

A

laterotrusive

38
Q

It has a mechanical advantage—it magnifies the force applied to the area where work is being done, relative to the
force put into the lever system.

A

THE CLASS II LEVER.

39
Q

What is an example of a class II lever?

A

nutcracker

40
Q 
It has a mechanical disadvantage. LESS
force is applied to the area
where work is being done,
relative to the amount of force
put into the lever system.
A

Class III lever`

41
Q 
Most of our musculoskeletal system is intended to function as a class \_\_\_\_\_ lever system—INCLUDING THE
JAWS & TEETH.
A

class III Lever

42
Q

Why is it Better to Keep Guidance Further

Anteriorly and on the Laterotrusive Side?

A

Since the T.M.J. is the fulcrum, a class III lever situation exists, and the teeth further
anteriorly receive the least force. They are the best positioned to handle forces
outside their long axes and—therefore—to do the guiding function. Anterior teeth on
the laterotrusive side are the best positioned of all to do this job because they are furtherest from the pterygoid
muscles that are driving the lateral excursion.

43
Q 
Teeth—especially the\_\_\_\_--
on the mediotrusive side are actually
subject to force magnification because
they are receiving forces generated by a
class II lever system. Ideally, they
should clear in mediotrusion.
A

molars

44
Q

THE IDEAL TEETH FOR GUIDANCE IN LEFT

LATERAL ARE THE LEFT ______.

A

CUSPIDS

45
Q

Horizontal overlap is

termed_____

A

overjet

46
Q

Vertical overlap is

termed_______

A

overbite

Operative (12 decks)

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