Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BDS3 CLINICAL Occlusion > Occlusion 3 > Flashcards

Occlusion 3 Flashcards

1
Q

What type of articulators are there

A

arcon
average value
semi adjustable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the angles used on an average value articulator

A

bennet angle is set at 15 degrees

the condylar guidance angle is set at 30

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a semi-adjustable articulator

A

it allows you to set the bennet and condylar guidance angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What do face bow transfers allow

A

the transfer of the maxillary cast onto the articulator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do we mount the mandibular cast in relation to the face bow transferred maxillary cast

A

inter occlusal reg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the components of the face bow

A

bite fork
transfer jig assembly
earbow
reference plane locator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the steps of doing a face bow transfer

A
  1. mark the anterior ref points
  2. bite registration using bite fork
  3. assemble ear bow and transfer jig
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do we mark the anterior reference point

A

on the patient’s RHS using the reference plane locator and marker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where is the anterior reference point

A

43mm apical to the incisor edge to the anterior teeth (12 ideally)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does the anterior reference point approximate

A

position of infraorbital foramen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How is the bite registrations taken

A

bite registration paste is applied to the bite fork
the bite fork arm to the right and locating notch faces up
firmly seat to record the cusp tips of the maxillary teeth
do not engage undercuts
check that it is parallel with patients coronal and horizontal planes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How do we align the bite fork

A

align the dental midline with the locating notch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What should we able to see in the bite reg

A

indentations of maxillary teeth clearly visible to allow accurate repositioning and then mounting of the maxillary cast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How do we assemble the ear bow and the jig

A

loosen the centre wheel to allow the ear bow to open and close

attach the vertical shaft to the measuring bow with clamp marked 2 on the patient’s right and tighten the finger screw on the ear bow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How do we assemble the face bow on the patient

A

by sliding the bite fork arm through the clap marked 2

fit the measuring bow’s earpieces tightly into patient’s ear

tighten the centre wheel on the bow

raise or lower the bow so that the pointer aligns precisely with the anterior reference point

if you are aligned with the reference point, tighten the clamps 1 and 2

be careful not to alter the bow while tightening the clamps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do we remove the face bow

A

ensure bow is parallel to the inter pupillary line and floor

make sure the 1 and 2 clamps are secure

loosen the finger screw on the measuring bow, slide open the bow and remove the face bow from the patient

detach the measuring bow from the transfer jig by loosening the finger screw

disinfect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What have we recorded so far

A

the relationship of the maxilla to the hinge axis of rotation of the mandible

now we can mount the maxillary cast in an equivalent relationship on the articulator

18
Q

What are the two choices of inter occlusal reg that can be sued to mount the lower cast

A

ICP (confirmative approach)

RCP (reorganized approach)

19
Q

When we can we use no material for ICP reg

A

When the intercuspal is obvious

there is multiple tooth contacts when the px bites together

20
Q

When can we use wax or paste for ICP reg

A

when ICP is not obvious to the technician

21
Q

When do we use a record block for ICP reg

A

when there’s free end saddles and the casts cannot be hand articulated

22
Q

What can happen if too much wax is used

A

the OVD is increased and the restoration will be high in bite when placed

when using wax ensure it is thin and cusp tips are visible

23
Q

What is the registration paste

A 
silicone paste
sets quickly
small amount is needed
too thick and it will increase the OVD
occlusal contacts must be visible through the material
24
Q

What are the registration position options

A

RCP registration WITH or WITHOUT OVD increase (reorganized approach)

ICP registration WITH OVD increase (reorganized approach)

ICP registration WITHOUT OVD increase (confirmative approach)

25
Q

What is an unorganized approach

A

You haven’t assessed the occlusion before starting restorations

You change the occlusion with your restoration

You haven’t planned where your ICP will be and what the related jaw relationship is

You provide an occlusion which does not conform to the previously tolerated one

26
Q

What is the conformative approachdefined as

A

provision fo restorations ‘in harmony with the existing jaw relationships’

27
Q

What does the confirmative approach mean

A

that the occlusion of the new restoration is provided in such a way that the occlusal contacts of the other teeth remain unaltered

28
Q

When do we not use the confirmative approach

A

an increase in vertical height is needed to make space for restorations

tooth/teeth significantly out of position (i.e over erupted, tilted or rotated)

a significant change in appearance is wanted

there is history of occlusal related failure or fracture or existing restorations

29
Q

What is the reorganized approach

A

plan to provide new restorations to a different occlusion

the occlusion is defined before the work has started

provide restorations that change the occlusion but are well tolerated by px

30
Q

Why do we do reorganized approach

A

ICP is non existent or no use

you need space to place restorations

the retruded axis position of the mandible is a reproducible position independent of the teeth

31
Q

How do we take an inter occlusal record in RCP

A

the patient is guided into a terminal hinge closure to detect where initial tooth contact occurs (RCP)

The RCP record is taken at a slightly increased OVD just prior to this initial tooth contact (the mandible is rotating about its terminal hinge axis)

32
Q

What are the most reliable techniques for interocclusal record in RCP

A

bimanual manipulation
chin point guidance
chin point guidance with anterior jig

33
Q

What do we need when we use wax or paste for RCP reg

A

must use a registration medum

may use an anterior jig

34
Q

When do we need to take a record block for the RCP reg

A

free end saddles

casts cannot be hand articulated

35
Q

What is the retruded arc of closure

A

from the RCP to R

36
Q

Where can RCP occur

A

it is the initial tooth contact

it can occur at any point on the retruded arc of closure

this is sometimes called a centric relation premature contact

37
Q

If the initial contact is on posterior teeth what is there most likely to be

A

a slide from RCP to ICP as the patient tries to achieve maximum inter causation

38
Q

In what % of patients are RCP and ICP the same

A

10%

39
Q

What is the position of RCP compared to ICP usually

A

0.5-2mm

40
Q

What are the options for guidance

A

when restoring anterior teeth we can copy existing guidance or change it

41
Q

What is the check list for occlusal analysis

A 
TMJ function and muscles of mastication activity
incisor relationship
molar relationship
open and/or cross bites
guidance
wear facets/severity of tooth wear
restoration fractures
occlusal contacts
deflective contacts 
working/non working side contacts 
mount casts on an average value or semi adjustable articulator and review all of the above

BDS3 CLINICAL Occlusion (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions