Lectures 5a,b,c for Exam I Flashcards
This is a simple holding instrument capable of accepting a single static registration. Vertical motion is possible
a NON adjustable articulator
This is an instrument that simulates condylar pathways by using averages or mechanical equivalents for all or part of the motion. These instruments allow for orientation of the cast relative to the joints and may be arcon or non-arcon instruments.
a SEMI adjustable articulator
What is the difference between an ARCON and a NON ARCON articulator?
Arcon=condyle in mand and fossa in max….NON arcon is condyle maxillary! weirdo!
This is an instrument that will accept three- dimensional dynamic registrations. These instruments allow for orientation of the cast to the temporomandibular joints and replication of all mandibular movements.
FULLY adjustable articulator
Instrument used to record the three dimensional dynamic records that arre used to set the instrument
Pantograph
EXAM QUESTION!! The prob with simple hinge articulators: Their ________ creates an arc of closure which will tend to cause pre maturities affecting the _____ inclines of the mandibular teeth and the _____ inclines of the maxillary teeth.
Short radius… distal… mesial
FACEBOW: To record the anteroposterior and medial lateral spatial position of the maxillary occlusal surface relative to the ________ from the patient to the articulator.
hinge axis
Which type of face bow does our SEMI-Adjustable articulator use?
Arbitrary Facebow
Which type of face bow is used on a FULLY adjustable articulator?
Kinematic Facebow
What type of face bow is used?… Non-adjustable articulator.
No face bow used
What is the third reference point for OUR Whipmix Facebow??
The Nasion!
What is the 3rd point of reference for the Hanau Spring-Bow?
The infraorbital notch
What is the 3rd point of reference for the Denar FaceBow?
43mm above the incisal edges of the max teeth
The hinge axis of the mandible can be determined to within ___ mm by observing the movement of kinematic facebow styli positioned immediately lateral to the temporomandibular joint close to the skin.
1 mm
The 2200 series instrument has a permanent nonadjustable intercondylar width of ___ mm. This corresponds to the “M” width shown on the facebow.
110
The angle of inclination of the condylar guidance to an accepted horizontal plane
Condylar Inclination
EXAM QUESTION! The angle formed by the sagittal plane and the path of the advancing condyle during lateral mandibular movement, as viewed in the horizontal plane.
Bennett Angle
Mandibular immediate ______ is a lateral movement of the condyles at the commencement of mandibular laterotrusion
side shift
The ROTATING condyle is the _______ side, and the ORBITING condyle is the ________ side.
working…non-working
“_______”: To hold the condyles in a retruded position, the centric latch is snapped closed
“centric lock”
How the anterior teeth protect the posterior teeth when the mandible is brought forward
anterior guidance
The guidance of the anterior teeth can be recorded in ________ on the anterior guide table.
acrylic resin
The maxillo-mandibular relationship in which the condyles articulate with the THINNEST _______ portion of their respective disks with the condyle-disk complex in the _______ position against the articular eminences.
avascular…..anteriosuperior
Centric Relation is independent of ________ and is PURELY _______ in opening and closing movements.
tooth contact…..rotational
Which CR finding method uses a LEAF GUAGE and a jig?
Unguided method
_________ are also called Check bites–To set the condylar guides to approximate
the anatomic limits of the TMD joint
Lateral Records
With the RIGHT lateral interocclusal record in place, the LEFT condyle does not contact the ______ wall! OR the ______ wall of the guide…The condylar inclination is increased until the condyle contacts the ______ wall of the guide..same goes for the _____ wall
superior …. medial …. superior … medial
What do we gain when we fabricate to make a CUSTOM incisal guide table?
anterior guidance
What is the Powder to Liquid ratio of our DURALAY Pattern Resin
P3:1L
What are the 4 excursive pathways you will move the articulator when making the custom incisal guide table?
- Right lateral excursion 2. Left lateral excursion 3.Protrusive 4.”Intermediate” pathways
When making the custom incisal guide table, MAKE SURE the pin touches the table in ______.
MI/CR
In a mandibular movement to one side, the condyle on the nonworking side will arc ______ and _______. Meanwhile, the condyle on the working side will shift ______ and usually slightly _______.
forward and medially… laterally…. posteriorly
Maximum number of teeth in contact in maximum intercuspation and all excursive positions.
Bilateral Balanced Occlusion (only used in complete dentures)…LOTS of disadvantages!
2 names: During lateral excursions, there are no contacts between teeth on the mediotrusive (nonworking) side, but even excursive contacts occur on the laterotrusive (working) side…..No posterior occlusion in protrusion
Unilateral Balanced Occlusion / Group Function
Ideal! (2 terms) During lateral excursions, there are no contacts on the mediotrusive (nonworking) side; all contacts are between the laterotrusive (working side) canines…..Anterior teeth disclude the posterior in a protrusive movement
Mutually Protected Occlusion, Canine Guided
Long Centric Relation: Allows for some freedom of movement in an anteriorposterior direction is advantageous in _______ balanced occlusion
unilateral
Long Centric Relation: Ranges from ____ to ____ mm
0.5 to 1.5 mm
Long Centric Relation: Assumes that the condyles can translate _________ in the fossae before beginning to move downward
horizontally
Long Centric Relation: Necessitates a greater _______ space between the maxillary and mandibular anterior teeth
horizontal
Optimum Occlusion! Uniform contact of all teeth around the arch when the mandibular condylar processes are in their most _______ position
superior
Optimum Occlusion! Stable posterior tooth contacts with ________ directed resultant forces
vertically
Optimum Occlusion! Centric relation coincident with _________
MI
Optimum Occlusion! No ______ of posterior teeth in lateral or protrusive movements
CONTACT
Optimum Occlusion! _______ tooth contacts harmonizing with functional jaw movements
Anterior
An occlusal relationship capable of producing pathologic changes in the stomatognathic system =
pathologic occlusion
“Great Exam Question”: restricted opening AKA ________ is a symptom of Pathologic Occlusion!
trismus
Most patients seem able to ______ to SMALL occlusal deficiencies without exhibiting acute symptoms
adapt
What is the main disadvantage to PolyMETHYL Methacrylate?
HIGH CURING HEAT!
What is an advantage of PolyETHYL Methacrylate?
LOW curing heat!
Unpleasant taste, Allergic reactions, Dust when Grinding, Expensive are all disadvantages to the ________ temp material.
Visible light cured (VLC) Urethane DiMethylMethacrylate material (but it is esthetic and wear resistant!)
The INTEGRITY material we use for temps is a _________ material….Whats the ONLY disadvantage listed?
Bis-Acryl Composite Resin….HIGH COST!
What are the 3 requirements for a provisional??
1.Biologic 2.Mechanical 3.Esthetic
While the indirect provisional is more accurate, the direct provisional is much _______
faster
When taking the impression, seat the tray against the ______ arch and then close the ______ arch..Setting time for PVS is ___ minutes…
max…mand…4 minutes
If the permanent cement is to be a resin cement it is recommended to use a ________ cement for the interim restoration because of the adverse effect of eugenol on bond strength
non eugenol (vs ZOE cement)
