Removable Midterm
What is the most favorable way to increase setting time of alginate?
decrease water temperature
what is the only portion of a record base that is highly polished?
the periphery
what is the most widely used arbitrary hinge axis point?
external auditory meatus
success or failure of a fixed bridge depends largely on what?
the pontic design
what type of ceramic is stabilized with Yttrium, giving it high strength?
zirconia
What is the first step of denture making once the preliminary impression is poured up?
mark the depth of the muccobuccal fold on the cast
How do you border mold the area of a maxillary denture whose thickness and length is limited by the coronoid process?
instruct the patient to move jaw side to side, open wide, pucker, and smile
what is the first step during an MMR procedure?
establish the labial form of the occlusal rim
how would you classify your patients edentulous ridge if they had loss of height, but normal width?
class II
What is the average thickness of tooth structure overlying the pulp in an axial direction? What is considered biologically safe?
2.5 - 3 mm
biologically safe = 1.2-1.5
What is the retarder in alginate?
Sodium phosphate
How do you border mold the masseter groove and retro molar pad region of a mandibular custom tray?
instruct the patient to close and resist the closure with your forefingers
when your patient comes back to visit you 1 week after they received their denture, you noticed their muscles of facial expression have lost their tonicity. what was this caused by?
excessive freeway space / inadequate VDO
name two finish line geometries that are only indicated for metal crowns?
- bevel
- knife-edge
name the additive manufacturing process discussed in the digital dentistry lecture that is used to create PFM and all gold crowns
3D printing
name 3 functions of a vent hole in your custom tray.
- permit proper seating
- relieve pressure over incisive papillae and rugae
- prevent entrapment of air bubbles in the impression
Describe what happens to the non-working condyle during an immediate side shift
it moves medially then in a straight line as it leaves the centric relation position
what type of crown / prep would you do if your patient had extensive coronal destruction, caused a short/conical shaped prep?
full gold crown
non-rigid (precision, semi-precision, or milled)
how do you fix overextended margins of a provisional? describe bur rotation
bur should rotate TOWARDS the provisional
the thinnest part of the mandibular custom tray extends where?
into the retromylohyoid space
what is the FINAL test used to determine if the VDO proposed is indeed correct?
closest speaking space
what is the goal of gingival displacement?
create a space in the gingival groove > 0.2 mm
the characteristics of this provisional material include
- low curing temperature
- high tensile strength
- can work directly on the tooth
- difficult to repair / add to
Bis-acryl resins
what hemostatic agent causes local tissue destruction and interferes with the setting time of PVS materials?
aluminum chloride (hemodent)