Systems Ii Younai Diabetes

Front 1

Goals of occlusion

Back 1

maintain stability of existing stable occlusion
-improve stability of an unstable occlusion

Front 2

Articular Eminence is comprised of?

Back 2

-thick cortical bone

Front 3

Mandibular condyles located in centric relation?
What determines the position?
CR and ICP ideally?

Back 3

-anteriorly, superiorly brace position along articular eminence of glenoid fossa with articular disc interposed b/w condyle and eminence
-condylar position
-ideally CR = ICP-40-60%

Front 4

Shape of mandibular condyle? Reason? Rest on?

Back 4

-elliptical capapble of stress distribution, center of articular disc

Front 5

Articular disc properties?

Back 5

-anterior: attached via muscle fibers from superior head of lateral ptrygoid, ligaments to medial and lateral heads to condyle
-Center: Free of nerves and vascularture
Posterior: blood vessels and nerve

Front 6

Mandibular Movements:

Back 6

-Rotation
-Translation
-Bennett

Front 7

Rotational Movements:

Back 7

-horizontal axis: movement purely opening/closing of mandible with condyles in CR. Hinge axis
-Vertical axis: one condyle in fossa other moves forward. Occurs on side of laterotrusive movement
-Sagittal Axis: One condyle moves forward and down articular eminence. Occurs on mediotrusive side

Front 8

Translational Movement:

Back 8

1. Purely roational movement first 10-13 degree arch and 20-25mm sepearation.
2. Articular disk stationary
3. Once beyond this arc, condyle moves forward and downwardtranslational

Front 9

Bennett Movement:
Immediate Side Shift:
Progressive Side shift:

Back 9

-mandible moves to left:
Immediate: right condyle moves straight medially as it leaves CR
-usually .4-3.0mm
-occurs prior to condyle translating forward and downward
Progressive side shift:
-after immediate side shift, right condyle will continue to move medially but now will have a proportional forward movement.

Front 10

Balancing inclines are?

Back 10

-nonworking side
-mandible: buccal cusp, lingual incline
-maxilla: lingual cusp, buccal incline

Front 11

Working inclines are?

Back 11

-working side
-mandible: lingual cusp, facial incline
-maxilla: buccal cusp, lingual incline

Front 12

Working inclines are?

Back 12

-working side
-mandible: lingual cusp facial incline, buccal cusp facial incline
-maxilla: buccal cusp lingual incline, lingual cusp lingual incline

Front 13

Balancing inclines are?

Back 13

-nonworking side
-mandible: buccal cusp, lingual incline
-maxilla: lingual cusp, buccal incline

Front 14

Increase immediate side shift?

Back 14

-increase in BL dimension of MR, fossa, central groove
-flat part in middle part of tooth wider

Front 15

Increase PSS?

Back 15

-balancing inclines become flatter

Front 16

Left and Right sides during Bennett Movement in a left laterotrusion

Back 16

-Left side:
-laterotrusive/working movement
-left condyle is rotating
-shift laterally and posteriorly
-right side:
-mediotrusive/non-working movement
-right condyle is orbiting
-arcs forward and medially

Front 17

Bennett Angle:

Back 17

-horizontal plane: non working condyle moves in a line/curvilinear pathway downward and to the right. Angle made to sagittal axis is called Bennett Angle.

Front 18

Determinants of Mandibular Movement

Back 18

-Posterior: Right and left temperomandibular joints
-Anterior: teeth
-neuromuscular system

Front 19

What can a dentist alter in mandibular movements?

Back 19

-posterior no
-anterior can be changed

Front 20

Occlusal Inteferences

Back 20

-centric: during closure of mandible and prevent centric relation
-working: on same side jaw is moving on posterior teeth
-non-working: opposite side of movement on posterior teeth
-protrusive: posterior teeth during protrusive movements

Front 21

Normal vs. Pathological Occlusion

Back 21

CR doesn’t equal ICP but remain asymptomatic due to muscle adaptations
-But when add additional stress such as clenching or bruxingget pain

Front 22

Okeson’s Optimum Occlusion

Back 22

1. CR = ICP: Mouth closes, condyles are in most superior/anterior position on posterior slopes of articular eminences with discs property interposed. As this position there is even and simulataenous contact of all posterior teeth. Anterior teeth contact lighter than posterior
2. Axial Loading of Teeth: All tooth contacts provide axial loading of occlusal forces along long axis of tooth
3. Canince guide laterally: Laterotrusive movement there are guided contacts on working side to disclude non-working side. Canine Guidance
4. Anterior guide protrusively: Protrusive: adequate tooth guided contact on anterior teeth to disclude posterior teeth, incisor guidance
5. Posterior contacts heavier than anterior

Front 23

Organization of Occlusion

Back 23

1. Bilateral Balanced occlusion: every single tooth on that side is hitting at the same time as the other side, all inclines working together
- max tooth contacts during all excursive movement. Only possible in complete denture cases where non-working contacts prevent tipping of prosthesis
2. Unilateral Balance Occlusion: group fxn, where all teeth contact on working side during laterotrusion to help guide/lift the jaw; Excessive forces are prevented on mediotrusive side and occlusion/supporting cusps remain stable. Useful for full mouth recontstructions
3. Mutually Protected occlusion: anterior and canine guidance. Anterior teeth causes immediate separation/disclusion of posterior teeth during excursive movements.
In ICP, posterior teeth ar eloaded along long axis, and posterior teeth protect anterior teeth in ICP. CR = ICP

Front 24

Anatomic Determinants

Back 24

-molar disclusion
-condylar guidace
-anterior guidance

Front 25

Molar Disclusion

Back 25

-Molar disclusion: discrepancy between repearted excrusive movements:
-.2mm CR
-.3mm working
-.8 mm nonworking/ptrosuive
-makes sure to allow enough room between cusps so no crashing during disclusion

Front 26

-condylar guidance:
Angle is? Average? Steeper/flatter?

Back 26

-angle between articulating surface of fossa and surface of condyle
- Average = 30 degrees
-Steeper the condylar path the higher the cusps may be
-the flatter the condylar path the shorter the cusps MUST be

Front 27

Anterior Guidance Contact? Angle is? Average? Steeper/flatter?

Back 27

-Lower incisor contact lingual surface of uppers and guide in protrusion
-50-70 degrees average
-angle = lingual surface on maxillary and horizon
-steeper the angle of the incisors the taller the cusps maybe
-the flatter the angle of incisors the shorter the cusps must be

Front 28

VO large HO is small pathway is?

Back 28

More vertical/steep

Front 29

VO is small HO is large pathway is?

Back 29

More horizontal

Front 30

occlusal interferences:

Back 30

-centric: Retrusive
-mandibular: disal inclines
-maxillary mesial inclines
-Working
Mandible: buccal cusp buccal incline, lingual cusp buccal incline
Maxillary: lingual cusp buccal incline, buccal cusp lingual incline
Non-working
Mandible: buccal cusp lingual incline
Maxilla: lingual cusp buccal incline
Protrusive
Mandibular: mesial inclines
Maxillary: distal inclines