Occlusion L5. Mechanisms of Mandibular Movement #2

border movement

Mandibular movement at the limits dictated by anatomic structures

plane

Border movement is viewed in a given ___

border movement

What is this trace rotation?

sagittal

Posselt's envelope is in the __ plane

posterior opening border

What is movement #1 in Posselt's Envelope?

MIP

In Posselt's envelope, start at ___ with mouth closed and teeth fully occluding

Posselt's envelope

Whats this showing

MIP, CR, terminal hinge, rotation

The posterior opneing boder of Posselt's envelope is ___ to ___ to ___ ___, which is all ___ movement only

CR

top left arrow

MIP

rop right arrow

terminal hinge

bottom arrow

rotation, translation, maximum opening

After the posterior opening border to the terminal hinge, ___ and ___ movement occurs, leading to ___ ___

anterior opening border, protrusion, closes, maximum opening

Movement #2 of Posselt's envelope is __ __ __, leading to maximum ___ and jaw ___ from ___ ___

Superior contact border, MIP, protrudes, edge, edge

Movement #3 of Posselt's envelope is ____ ____ ___, which starts at ___ and the mandible ___. The mandible continues protruding until it's at an __ to __ position

incisal, lingual, incisal guidance

Whilst the mandible is protruding at the superior contact border, the ___ edges of mandibular teeth follow the ___ surface of maxillary teeth, an example of ___ __

envelope of function, #D, elliptical

Movement #4 of Posselt's envelope is the ___ __ ____, where the __ space is contained within the envelope of mandibular motion, defining mandibular movement during mastication and/or phonation.

The mandible functions in ___ pattern

horizontal

Gothic Arch tracing occurs at the ___ plane

MIP, CR

In gothic arch tracing, start at ____ with a slight shift to __.

left, left, lateral

Movement #1 of gothic arch tracing is a shift of the mandible to the __ side, creating maximum ___ ___ contact

maximum left lateral contact position

bottom right blue arrow

protrude, protrusion

Movement #2 of gothic arch tracing is when the mandible beings to ___ and reaches maximum ___

maximum protrusion

bottom blue arrow

right, right lateral

Movement #3 of gothic arch tracing is a shift of the mandible to the __ side, creating maximum __ __ contact

maximum right lateral contact position

bottom left blue arrow

protrude, protrusion

In movement #4 of gothic arch tracing, the mandible begins to ___ and reaches maximum ___

maximum protrusion

bottom blue arrow

frontal

coronal border movement occurs on the __ plane

MIP

In coronal border movement, start at ____

left, left lateral

Movement #1 of coronal border movement is a shift of the mandible to the __, creating maximum __ __ contact

maximum left lateral contact position

blue arrow

open, opening

In movement #2 of coronal border movement, the mandible beings to __ and reaches maximum __

maximum opening

blue arrow

right, right lateral

Movement #3 of coronal border movement involves shifting the mandible to the ___, creating maximum __ __ contact

maximum right lateral contact position

blue arrow

open, opening

Movement #4 of coronal border movement is when the mandible begins to __ and reaches maximum ___

maximum opening

envelope of function, elliptical

In coronal border movement, the frontal plane tracing also shows the ___ __ ___.

The mandible functions in ___ pattern

envelope of function

Whats being shown with the little black arrows here

MIP

Most functional movements require ___ to chew and tear food

MIP

Most movements begin at or below ___

postural position

The position of the mandible when it is 2-4mm below MIP.

Here the mandible is functionally ready and involves immediate action of teeth

electromyographic

At the physiological rest position, the muscles of mastication are at the lowest level of ___ activity when patient is sitting in an upright position

inferior, anterior

At the physiological rest position, the mandible is positioned __ and __ to MIP

Working (Laterotrusive) side

where the mandible is working

non-working (mediotrusive/balancing) side

the opposite side of the working (laterotrustive) side

left

In the non-working side , the patients mandible moves to the patient's ___

left

Which side of the mandible is the working side: left or right?

right

Which side of the mandible is the non-working (balancing) side: left or right?

left

Moving the articulator to the patient's right stimulates moving the patient's mandible to the ___

elliptical

Human chewing is complex and occurs in an ___ pattern