Brainscape's Knowledge GenomeTM

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


See full index

Restorative > Articulators and Splints > Flashcards

Articulators and Splints Flashcards

0
Q

What are the four types?

A

Simple hinge
Average value
Semi adjustable
Fully adjustable

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

What is an articulator?

A

A mechanical hinge like device which stimulates movements of the mandible
Replication of the paths of movements of the TMJ

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

What is the simple hinge type of articulator?

A

Most basic type
Arbitrary arc of closure
Produces an even occlusal contact in a static position only
Cannot simulate excursions

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

What is the simple hinge articulator based upon?

A

Bonwills 4” equilateral triangle

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

What is an example of the average value articulator a?

A

Ash free plane 75 and dentatus ARS

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

What are the values for the average value?

A

Incisor : 10: horizontal plane
Condylance angle: 30: horizontal plane
Bennetts angle: 15: Sagittaal

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

What are the semi adjustable articulators?

A

Dentatus ARH non archon and Denark Mark 2 arcon

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

What are the angles measures in the semi adjustable?

A

Incisor: adjustable : horizontal
Condyla: set to patients protrusion wafer: Frankfort plane
Bennett: set to oateint later : Sagittaal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the fully adjustable type of articulator?

A

Denark D5A

Incisor: adjustable
Condylar: set to pantographs 
Bennett: pantographs 
Inter condylar distance: adjustable width
Pantographs: recordings transferable
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the condylar guidance angle?

A

The angle created when the condylar path is compared to the Frankfort plane which is usually set at 30dgrees

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

What is the incisal guidance angle?

A

The angle formed with the horizontal plane by the line between the incisal edges of the maxillary and mandibular central incisors when the teeth are ICP set at 10 degrees

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

What is the Bennett angle?

A

This is the angle between the Sagittal plane and the path of the advancing condyle during lateral mandibular event as viewed along the horizontal plane

15degreees

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

What is arcon?

A

The condylar element on the lower member

Better for crown and bridge

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

What is non arcon?

A

The condylar element is on the upper member

More beneficial for denture construction

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

What are the advantages of Articulators?

A

Occlusal movements can be reproduced outside the mouth
Occlusal surfaces can be constructed out the mouth
Occlusion can be viewed from lingual aspects
Time saving
Convenient for patient

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

What are the uses of articulators?

A 
Diagnosis
Treatment planning
Multiple crowns and bridge 
Reorganising the occlusion 
Occlusal splints eg Michigan
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What can hand held casts do?

A

They can reproduce ICP
All excursions are governed by the teeth with no include of TMJ
But not accurate enough for multiple restorations

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

When are simple hinges useful?

A

For single crown but not popular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

When are average values used?

A

In denture construction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

T/F the semi adjustable articulators provide a better approximation to the retruded position

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What articulator is used for fixed prosthesis ?

A

Semi adjustable articulators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

When would you use ICP?

A

When only restoring a small segment of the arch and enough inter occlusal stops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When would you use RCP?

A

When having to restore larger parts of the occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a Facebow? And when is it indicated?

A

An instrument used to record the relation of the maxilla to the hinge axis of the rotation of the mandible

Multiple crowns
Bridgework
Occasionally dentures
Reorganising occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What do you use to set the condylar guidance angle on a semi adjustable articulator?

A

Inter occlusal Wafers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

How thick are the wafers used to record the condylar guidance angle?

A

3-5mm thick

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What happens with the wafers for the arcon vs non arcon?

A

When the wafer is removed and articulator is closed, the arcon articulator condylar guidance angle remains the same but non arcon the angle changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

T/F the fult adjustable articulators can reproduce a full range of movements?

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are used to record the mandibular borders in fully adjustable?

A

Pantographs paper or digital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What are thr two types of facebows?

A

Kinematic/hinge axis

Average

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What are kinematic hinge axis facebows?

A

Facebow is attached to the mandible which is moved through the translational retruded arc
Ends of the bow have stylinwhich sit over the condylar head areas

Need a second now to record this transfer to the articulator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

T/F the average axis Facebow is more commonly used?

A

T

Too time consuming for kinematic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What do the average facebows use for landmarks?

A

3 points

Anterior and posterior landmarks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

How do you use the denar face bow?

A
  1. Mark 43mm dot from the incisal edge of upper right lateral
  2. Place hydro bite on to bite fork
  3. Centre bite fork in mouth and pt then bites
  4. Place the ear plugs into EAM and slide the the reference pin to number 2
  5. Then tighten screw
    5.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What are Occlusal splints ?

A

Rigid or flexible appliances that overlay the occlusal surfaces of the teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

When are splints used?

A

Tooth surface loss

  • diagnosis
  • prevention
  • mangement

Bruxism
-control the noise but not a treatment

TMD
-not to be used for long term

c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What are the functions of splints?

A 
Alter occlusal forces
Prevent wear and mobility of teeth
Reduce bruxism and Parafunction
Treat masticatory muscle pain and dysfunction 
Alter thr structural relationship of TMJ
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What are the theories to how a splint works?

A 
Clarke 1984
OMRTC
-occlusal disengagement
-maxilliomandibular realignment 
-restore vertical dimension
-TMJ repositions 
-cognitive awareness
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

WHat is the occlusal disengagement theory?

A

Provide an ideal occlusion to reduce abnormal muscle activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

What is the maxilliomandibular realignments theory?

A

Assumes that ore existing mandibular positions were incorrect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What is the aim of the maxilla mandibular relaignemnt ?

A

Produce Neuronmuscular balance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What is the restored vertical dimension theory?

A

-Assumes patient has lost vertical height leading to abnormal muscle activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

What happens to the muscles in the restored vertical dimension theory?

A

Restored to correct length

43
Q

What is the TMJ repositions theory?

A

Assumes condylar had needs to be repositioned in glenoid fossa

44
Q

What adjunct is needed for the TMJ repositioning theory?

A

Need Radiograph to diagnose it

45
Q

What is the cognitive awareness theory?

A

Having something in you mouth alters behaviour

PLACEBO

46
Q

Which type of splint mechanism can be applied to all?

A

Cognitive awareness

47
Q

What are the three groups of splints?

A

Relaxation
Repositions
Stabilisation

48
Q

What are the types of relaxation splints?

A

Soft splint/POC
Localised interference splint
Anterior bite plane

49
Q

Which type of splint is rarely used now?

A

Repositioning

50
Q

What are Types of the stabilisation splint?

A

Michigan/stabilisation

Thermoform

51
Q

What is the soft splint/POC made from?

A

Polyethene
Polyvinyl
VAccum formed

52
Q

T/F there is no attempt to balance occlusion in the soft splint/POC ?

A

T

53
Q

What can the soft splint/POC be used for and why?

A

First line splint and diagnostic aid in bruxism

Cheap and quick and easy

Simple alginate impression and no jaw reg needed

54
Q

When are soft splint/POC usually worn?

A

At night

55
Q

Which arch are soft splint/POC usually made?

A

Lower

But can be for either

56
Q

What can happen in some peopl with soft splint/POC ?

A

May increase Parafunction so monitor

57
Q

T/F soft splint/POC can be used over ful denture to increase face height?

A

T

58
Q

What are LOIsplints used for?

A

Deliberately over load the proprioception fibres of four teeth and this provide neuromuscular feedback
May also remove posterior interferences as anterior teeth are separated

59
Q

How do you make a LOIS?

A

Upper and lower alginate
Centric occlusion wax

Upper heat cured acyclic plate retained with Adams clasp or ball end clasp and then to occlusal ball end clasps on canine or premolar to interfere with Occluding

60
Q

When would you use a LOIS?

A

Patient who bruxism or clench
Habit breakers
Short periods only

61
Q

What is another name for ther anterior bite plane?

A

Lucia Jig

De programmer

62
Q

What type of splint is the anterior bite plane, full or patprtial coverage?

A

Partial

Occlusal disengagement

63
Q

T/F can make an anterior bite plane at chair side?

A

T can use autopolymersising acrylic

64
Q

When are anterior bite planes used?

A

Acute muscle spasms

SHORT TERM

65
Q

When shoud the anterior bite plane be used?

A

Not at night!!!!

66
Q

How does the anterior reposition splint work?

A

Provides mandible

67
Q

How do you make an anterior repositions splint?

A

Upper and lower alginate
Patient open wide until click heard
and then into protrusion no click heard
When In this protuding position no opening or closing clicks should be heard, at this point, record wax

68
Q

When are anterior repositions splints used?

A

Patients that have internal dereangemtn

69
Q

When should you not use an anterior reposition splint?

A

If the click does not disappear on protrusion

70
Q

When shoud anterior repositions splints be worn?

A

Everyday
All day
Including eating

71
Q

What should you advise with ant reporting splint?

A

Soft diet and review monthly

72
Q

How long does it take for patient to become symptom free with anterior reposition splint?

A

6-12 weeks

Weaned off slowly

73
Q

What is another name for a stabilisation splint?

A

Tanner
Michigan
Fox appliance
Centric relation appliance

74
Q

What does the stabilisation splint provide?

A

Ideal occlusion
Anterior guidance which is free from posterior interference
RCP equals ICP

75
Q

Which arch is the stabilisation splint made on?

A

The one with the most missing teeth

RECORD RJR/CR

76
Q

How does the stabilisation splint retain itself?

A

Friction fit but can also be ball ended clasp

77
Q

What should the stabilisation splint allow in centric occlusion?

A

Even contact with oppsing teeth

posterior balanced occlusion

78
Q

What is the stabilisation splint useful for?

A

Determine the positi of centric relation in those that have deranged occluso

79
Q

When should the stabilisation splint be made?

A

Night time
Review monthly
Weaned off

80
Q

What are thermoformed splints?

A

Half way version between soft and hard splint

Made in hard polymer or laminate version

81
Q

What are the determinant of occlusion?

A

Teeth
Left and right TMJ
Neuromuscular system

82
Q

What is occlusion?

A

Any contact between opposing arches

It is static

83
Q

What is another term for ICp?

A

Centric occlusion

Maximim intercuspation

84
Q

What is ICP?

A

Position of the mandible when there is maximum intercuspation of oppsing teeth and fossa

Purely tooth related

Held on average for 17mins per day

85
Q

What is another term for RCP?

A

Centric relation

Ligamentous position

86
Q

What is RCP?

A

Position of the mandibl when tooth contact first occurs on retruded arc of closure

87
Q

Where are the heads of the condyle in RCP?

A

Medically braced
Upper most
Unstrained

88
Q

Where does RCP lie relative to ICP?

A

RCP is 1-1.5mm posterior to ICP

89
Q

What is the working side?

A

Side to which mandibular movement is directed

90
Q

What is non working side?

A

Side away from a mandible movement

91
Q

The working side is also the ?

A

Bennett movement

92
Q

What is anterior guidance ?

A

Path of guidance provided by the Palatal surfaces of the most anterior functional upper teeth during protrusion of mandible

93
Q

What is canine guidance?

A

Path of guidance provided by Palatal surface of thr maxillary canoe teeth during lateral movement of mandible

94
Q

What is disclusion?

A

Separation of anterior and posterior teeth during canine guidance
Separation of posterior teeth during anterior guidance

95
Q

What is group function?

A

Articulation between posterior teeth On working side during lateral movement of the mandible

96
Q

What is long centric?

A

Is a patient lacks anterior tooth contact in ICP they must protrude or move laterally before guidance teeth touch

If front teeth hit together as hard or harder than posterior teeth then there is no freedom in centric

97
Q

Which patient have long centric?

A

Class 2/2 and crowns that are toot thick on plagal surfaces

98
Q

What is an occlusal interference ?

A

Undesirable occlusal contact that May produce deviation of the mandible to and from ICP

99
Q

What are centric interferences?

A

Premature contact that occurs when the mandible closes with the condyles in their optimum position in the glenoid fossa

100
Q

What are working interferences?

A

Premature contact between the maxillary and mandibular posterior teeth on the same side of the arch as the direction of movement in lateral excursion

101
Q

What are non working interferences?

A

Premature contact between the maxillary posterior teeth on the opposite side of the arches as the direction in which the mandible moves in lateral excursion

102
Q

What are protrusive interferences?

A

Premature contact between the mesial aspects of mandibular pst teeth and distal aspect of maxillary teeth during protrusion

103
Q

What is the optimum occlusion?

A

Condyles in Unstrained position in ICP
Molars in heavy contact in ICP
Anterior teeth in lighter contact in ICP
Occlusal forces dericted along long axis of teeth

In lateral movement working side guidance and no non working side interferences
In protrude movements anterior guidance and posterior disclusio

104
Q

WHat is the confimratife approach?

A

Accepts ICP

105
Q

What is the reorganised approach?

A

Makes ICP and RCP co incident

106
Q

What are the features of a Michigan splint?

A

RCP equals ICP
Posterior disclusion
Canine protection
No non working side contacts

Restorative (45 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions