Articulation And Occlusion Test 1

Front 1

3 axes of rotation

Back 1

Horizontal, vertical, sagittal

Front 2

Horizontal axis is motion through

Back 2

sagittal plane

Front 3

In a centric relation, rotation occur at: lower joint space or upper joint space?

Back 3

lower joint space = rotation

Front 4

Translation occur at upper joint space or lower joint space?

Back 4

translation = upper joint space

Front 5

Vertical axis motion through what plane?

Back 5

Horizontal plane

Front 6

mediotrusive is: working side or non-working side?

Back 6

Mediotrusive = non-working side

Front 7

Laterotrusive is working side or non-working side?

Back 7

Laterotrusive = working side

Front 8

Balancing side is mediotrusive or laterotrusive?

Back 8

balancing side = mediotrusive = non-working side

Front 9

sagittal axis motion through what plane?

Back 9

frontal plane

Front 10

during a left or right lateral excursion there is movement about what axes of rotation?

Back 10

all 3: Horizontal, vertical, sagittal

Front 11

During a protrusitive meovement what axes of rotation occur?

Back 11

Protrusive movement = NO movement about any axes of rotation.

Front 12

In a Centric relation or terminal hinge axis what are the condyles doing and what are the disc doing?

Back 12

In CR postion: condyles are in their most superoanterior position, resting on the posterior slopes of the articular eminences. Disc - properly interposed.

Front 13

Discription of CR position:

Back 13

Exact position; Most orthopedically stable position; Most muscular stable position; Most repeatable position; Unchangeable in the short term; Limit of mandibular movement posteriorly.

Front 14

Discribe the disc.

Back 14

Dense connective tissue with no nerve or blood supply. It divides the superior joint space from the inferior joint space. Disc is thicker in anterior and posteior portion and thinnest at intermediate.

Front 15

Retiodiscal tissue

Back 15

Highly vascularized; produce synovial fluid.

Front 16

Translation movement

Back 16

Translation movement = Condyle comes forward pulling the disc - condyle pulls the disc. All translation occur at upper joint space.

Front 17

Function of Collateral Ligament

Back 17

Collateral Ligament: restricts the movement of disc away from the condyles.

Front 18

Function of capsular ligament.

Back 18

Capsular Ligament: Restrict medial, lateral, and inferior forces that might seperate the joint.

Front 19

Function of the Temporomandibular Ligament Outer Oblique Portion:

Back 19

Outer Oblique Portion: resists excessive dropping of the condyle; Limits roational opening movement of the condyle thereby producing translation of the mandible.

Front 20

Function of Temporomandicular ligament Inner Horizontal Portion:

Back 20

Inner Horizontal Portion: Limits posterior movement of the condyle and disc.

Front 21

Function of Stylomandibular ligament:

Back 21

Stylomandibular Ligament: Limits protrusive movement of the mandible.

Front 22

Innervation of the Temporomandibular Ligament:

Back 22

Primarily Auriculotemporal nerve.

Front 23

Muscles of Mastication

Back 23

Temporalis, Messeter, Medial & Lateral Pterygoid.

Front 24

Function of Temporalis Ms.

Back 24

Temporalis: Anterior portion - raises the mandible vertically; Middle portion - elevates and retrudes the mandible; Posterior portion - elevates and slightly retrudes the mandible.

Front 25

Function of Massester Ms.

Back 25

Messeter: elevates the mandible.

Front 26

Function of Medial Pterygoid ms.

Back 26

Medial Pterygoid Ms: elevates the mandible.

Front 27

Superior lateral pterygoid attach to what and Inferior lateral pterygoid attach to what?

Back 27

Superior lateral pterygoid attach to disc.
Inferior Lateral Pterygoid attach to neck of condyle.

Front 28

Function of inferior lateral pterygoid:

Back 28

Inferior lateral pterygoid: pulls the condyle forward in the fossa during protrustion or orbiting movements.

Front 29

Function of superior lateral pterygoid:

Back 29

Superior Lateral Pterygoid: Maintains the disc in the most anterior rotary position possible on the condyle when the mandible is at rest.

Front 30

Determinant of mandibular movements:

Back 30

Right TMJ; Left TMJ; Occlusion of teeth; Neuromuscular system.

Front 31

Occulsion of teeth is static or Dynamic?

Back 31

Occlusion of the teeth is a static position.

Front 32

Intercuspal Position (ICP)

Back 32

Maximum interdigiation and where anterior guidence begins.

Front 33

Cusp-marginal ridge (static)

Back 33

One tooth occlude with 2 teeth.

Front 34

cusp-fossa (static)

Back 34

1 tooth occlude with 1 tooth

Front 35

Mutually protected occlusion (dynamic)

Back 35

Canine guided occlusion: Laterotrusive side - canines only; Mediotrusive side - no tooth contact.

Front 36

Unilateral balanced occlusion (dynamic)

Back 36

Group function occlusion: Laterotrusive side - all facial cusps; mediotrusive side - no tooth contact.

Front 37

Bilateral balanced occlusion:

Back 37

Bilateral: laterotrusive side - all facial cusp; mediotrusive side - all posterior teeth contact.

Front 38

Latero-trusive excursion on bilateral occlusal contacts:

Back 38

bilateral temporal & masseter activity.

Front 39

Latero-trusive excursion on lateral trusive contacts (group functions):

Back 39

working side temporal & messeter activity.

Front 40

Latero-trusive excursions on canines only contact (mutually protected occlusion):

Back 40

working side temporal activity.

Front 41

Optimum occlusion:

Back 41

1) Even and simultaneous contact of all teeth, ICP
2) Forces directed down long axis of teeth
3) Lighter contacts on anterior teeth than posterior
4) During lateral movement, mediotrusive side is discluded immediately
5) During protrusive movement, all posterior teeth are discluded immediately.

Front 42

CR= ICP

Back 42

Even and simultaneous contact of all teeth.