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
