Exam 1

AutoClave sterilization can cause loss of strength and hardness T/F

True

T/F Accelerator and retarder can also affect expansion

True

T/F HEAT is a Product of the HemihyDrate to Dihydrate in the setting reaction

True

T/F Ideal occlusion is only achieved when CR andMI occur at the same time

True

T/F The Coordination between the Lateral pterygoid are very important

True

T/F proper alignment play a role in swallowing, appearance , and speech

True

T/f The condyle is guided mandibular movement

True

What are the 2 way Microporosity form in mixture and their shapes?

Water causing spherical void Angular space between crystal growths

What is Type 2 Gypsum Products?

Plaster

What is Crossover?

(Extreme movment) when Mandibular canine cross over the Maxillary canine

What 4 aspects of occlusion determine the Limits of mandible movement?

Mandible fossa(Temporal Bone) Ligaments Shape of condyles Size and Shape of Dentition

The Temporal Bone is make up a portion of the mandibular fossa and this determine the limit ------

Mandible movement

What does the Medial pole of the Condyle Prevent?

Mandibular posterior teeth from moving horizontally toward the miz line

How would you describe the role of the Sphenomandibular ligament is limiting Mandibular movment?

Minimulal

Plaster can take --- water to become the same consistency than stone

More

Why is the condyle/mandible positioning Superior and Anterior?

Muscle of Mastication

The is TMJ disc innervated or Vascularization?

No

What is the job of the Stylomandibular ligament ?

Limits excessive protrusive movement

In MI the force should be going down the ------ axis of the teeth?

Long axis

What 2 structure move when the lateral Pterygoid contracts?

1.Condyle move anterior 2, Articular Disc more with condly

That is The different between Type 4 and 5 Gypsum Products

4 is lab stone low expansion 5 is lab stone High ExPansion

How long does it take to reach Initial Set Time?

4 min from loss of gloss

What is the meaning of Parafunctional and what is a oral habit that considered Parafunctional?

A action that not helpful to the over all function like teeth grinding

Explain how sliding work?

After first contact in posterior is made, the Condyles must move out of the ideas to position do MI is achieve

Where is most of the articular occur on the Condyle?

Anterior surface

Protrusive movement is guided by what teeth?

Anterior teeth

What is Eccentric movement(of mandible)?

Any movement away from CR or MI

The is benefit and Problem of having excess water is Gypsum mixture?

B-The material is workable P- when water evaporate it leave material Porous and weakness

Thick Mixtures hardness more quickly? why is this

Because the nucleation center are concentration is smaller volumes,so interaction to grow solid

*What are the 2 type lubrication the synovial joints?

Boundary Weeping Lubrication-not enough of can cause sounds

What is the Process of making Calcium sulfate Dihydrate called?

Calcination

What is compound are Gypsum production made from...

Calcium Sulfate

What guides Early Lateral movement?

Canine

What are the type of guides for lateral movement and which is Ideal?

Canine guidance(ideal Group function (from canine with premolar and molar)

What are 4 word to describe the Max L cusp and the Mand B cusp (these occlued in the central fossa or at marginal ridge)

Centric Function Supporting Stamp

What type of Level is the the jaw?

Class 3(fulcrum--Effort---- load)

What is the nerves responsible for innervation of the 4 muscle of mastication?

Trigminal

This Gypsum derivative is made from Boiling in Calcium Chloride at then ground crystal?

Densite- High strength Stone

Which aspect of the TMJ is considered Secondary to the role of Limiting mandibular movement?

Dentition

What cause the Hemihydrate to form Dihydrate is setting reaction ?

Difference in Solubility

In Maximum intercuspation is described as the Posterior teeth being -------- contact and the Anterior teeth being------ contact. With the most occultation possible and force adequately distributed

Dominance Passive

What is the 2 uses of gypsum?

Duplication Anatomy for articular or restoration or Binder for cast investment

What 3 factor make the Retrodiscal tissue unqiue?

Elasticity Innervation Vascular

What is Hygroscopic expansion?

Enhanced expansion that occur is presence of additional water(hygro)

What isotropic expansion ?

Expansion in all direction do to growing pressure

T/F The TMJ can move independently of each other?

False

What is the other name from the Maximum intercuspation?

Habitual occlusion

What type movement is seen in the Superior Synovial vs Inferior cavity?

Inferior Synovial- Rotation Translation- Superior Synovial

How does increasing the time/speed of mixing affect Setting reaction speed?why

It shorting Because it forms more nucleation center

What is the problem with the Theoretical Water/ power ratio ?

It too less water and material can not be manipulation (18.6ml of water,+ 100 gm of powder>> 118 gms Dihydrate)

Why is the TMJ Disc referred to as Bi-concaves shape and pliable?

Its a Flexible, donut shape stutee with the thin part in the middle?

What Type 3 Gypsum Products

Lab stone

If the Left Lateral Pterygoid is Paralyzed, what movement will be seen if the patient is asked to open their mouth?

Left lateral movement, Alway to the same same as paralyzed.

During Left lateral movement what side of the mouth is working and what slide is balancing?

Left side is working Right Side is Balancing

The Mandible is Suspended by Musculature and the movements are limited by------

Ligaments

What are 4 characteristic Ligaments supporting the TML?

Limit Movement Non elastic Non contractile Protects muscles

What are 4 word to describe the Max B cusp and the Mand L cusp (these are NOT in the central fossa or at marginal ridge)

Non centrinc Non function Guiding Shearing

What is the function of the Outer Oblique portion and Inner Horizontal portion

OOP- Limit normal rotational opening movement IHP- Limits Posterior movement of condyle and disc

Maximum intercuspation is a ------ relationship

Occlusal

What is the Origin and insertion of the Medial Pterygoid ?

Origin Pterygoid fossa Insertion - Medical surface of the angle and inferior border of the mandible Action- Elevation, Protrusion, Mediotrusion (toward the midline)

What is the Origin and insertion of the Superior Lateral Pterygoid?

Origin- Greater wing of sphenoid Insertion- Neck of the condyle and medial surface Action-position disc and active during closing

What is the Origin and insertion of the inferior Lateral Pterygoid

Origin- Lateral surface of the Lateral pterygoid plate Insertion- Neck of the condyle Action- Protrusion and lateral movement Active during opening

What is the Origin and insertion of the Temporalis (3 portions)?

Origin- Temoral fossa Insertion- Coronoid process of ramus Action- Elevation and Retraction

What is the Origin and insertion of the Masseter(Superficial and Deep)?

Origin: zygomatic arch Insertion: angle of mandible and inferior border Action- Elevation and Protrusion

What are the 2 part of the Temporomandibular ligament?

Outer Oblique portion (OOP) Inner horizontal portal (IHP)

What is the combination of The curve of spee and Wilson?

Plane Occlusion

The Gypsum Derivative is made from dehydrating the Gypsum at 100-120*C till irregular crystal are made? 2 names

Plaster(Beta hemihydrate)

Where 2 part of the Temporalis is important for sitting the muscle inside the Condyle in the Fossa?

Posterior and Middle

What is the Origin and insertion of the Digastric(Anterior and Posterior)?

Posterior belly origin: in the mastoid notch of temporal bone Anterior Belly Origin- Digastric belly fossa Insertion-Intermediate tendon of hyoid bone Action Depress mandible and Elevate hyoid bones for swallowing

What is the Differ between Protrusive and Retrusive movements of the mandible?

Protrusive is the anterior movement of the mandible while Retrusive is Posterior movement of the mandible

What is the function of add Ca+ oxide / Gum arabic to Gypsum

Reduced water needed

During closure what are the Suprahyoid doing?

Relaxed

During closure what are the Suprahyoldhyoid doing?

Relaxed

Where does the Disc Rotate as the Condyle translate out?

Rotates posterior

The suprahyoids are considered------- to the muscle of mastication

Seconday

What the 3 muscle involved in mouth closure?

Temporalis Medial pterygoid Masseter

What type of Stress in Gypsum weaker to compression or Tensile

Tensile

What is being connected by the the plane of occlusion on the entire mandibular arch?

The Cusp tip and and incisal edges

What is the Water/Powder ratio

The amount of water required to have workable mixure

What being Positioned in Centric Relation?

The condyle/mandible

What the curve of Spee? and which arch is curve seen in each arch?

The imaginary line from from posterior teeth to Canine cusup tip Max- convex Mand0 concave

Arch size Occlusal contracts Musculate Oral habits Missing teeth What do these factors have in common?

The influencing Alignment

What is the Curve of wilson?

The line connecting the facial and lingual of poster teeth Max- convex Mand0 concave( just like spee)

What determine the Material made from the Dehydration of Gypsum rock?

The manner of remove its water

Where is the most force applied in the mouth?

The poster teeth closes to the TMJ

In context to Maximum intercuspation, What is Angle Class 1?

The relationship between 1st Molar and Canine

What is the Auriculotemporal, Messetic, Deep Temporal responsible for innervating ?

The synovial joints

For Centric Relation what part of the dise in most stable andwhere do we want the condyle?

The thin portion of disc Superior and Anterior of articuar eminecne

What is the Initial Set time characteristic as?

The time from material to become rigid enough to handle

What cause the Gypsum mixture to become more and more Viscous(and loss gloss)?

There formation of crystal

What are the 2 basic Premises of Tooth positioning?

There is an ideal way the teeth contact The an ideal way the condley and dise should be positioned

What happens if Centric Relation(CR) and Maximum intercuspation(MI) don't concide?

There will be slideing

What is the Final set time

Time required complete a reaction (unworkable)

Why is the Plane of occlusion not flat?

To allow maximum contact of teeth

When soaking Gypsum why cause Calcium sulfate be use?

To decrease the solubility of the Gypsum

The increase in W/P rate will do what to strength and why?

decrease it, due poorosity

This Gypsum derive is made from Heating in water vapor at 125*C to crystal are uniform? 3names

dental Stone- Hydrocal- Alpha hemihydrate

What is Type 1 Gypsum Prodcuts?

impression plaster

What is the function of Adding salt to Type 4?

reduce expansion

T.F Accelerators or Retarder are cause be add to gypsum mixture

true