Midterm Flashcards
What are the maxillary primary stress areas?
Alveolar ridge and tuberosities
What are the mandibular primary stress areas?
Buccal shelves
The _____________ is a secondary stress bearing area on the mandible.
Alveolar ridge
The _______ is a secondary stress bearing area on the maxilla only.
Lateral hard palate
The mucosa covering the hard palate and residual ridge on an edentulous patient is classified as _____________ mucosa because it is (keratinized or unkeratinized).
Masticatory; keratinized
What areas on may require relief to ensure there is no pressure on them in the final denture?
- Secondary stress bearing areas
- Palatal torus
- Median palatal raphe
- Mandibular tori
- Retromylohyoid ridge
- Undercuts or sharp bony prominences
What should be the anatomical posterior extent of the maxillary denture?
Vibrating line
T/F: The vibrating line is a straight line from one hamular notch to the other.
FALSE
Does go through the hamular notches but it is a CURVED line towards the anterior
Using phonetic sounds such as “f” and “v” can help determine what part of the maxillary occlusal rim?
Anterior contour and length
The anterior-posterior maxillary occlusal plane is often parallel with which line?
Ala-tragus line (Camper’s line)
The lateral maxillary occlusal plane is normally parallel with which line?
Inter-pupillary line
If the floor of the mouth is near the level of the ridge crest, ________ and ________ of the denture is severely compromised.
Retention and stability
A cross section of the residual ridge form in the shape of a ___ is most favorable for retention and stability.
U
T/F: A V-shaped ridge is unfavorable, but a flat/feather edged is the worst.
True
The biggest thing leading to instability of dentures is ________ tissue.
Movable
Which part of the maxilla can be displaced too far occlusally and disrupt interocclusal space, esp in a patient who has been edentulous for a long time.
Maxillary tuberosities
A class __ soft palate is favorable, while a class __ soft palate declines quickly into the throat leaving less room for the posterior of the denture.
I; III
Along with the vibrating line, what other two features denote the maximum posterior extent of the maxillary denture?
Hamular notches
T/F: The buccal shelf resorbs with the alveolar ridges.
FALSE
Buccal shelf does not resorb
The __________ creates the peripheral seal of the mandibular denture.
Retromolar pad
_______ and ________ are affected by the shape of the residual ridge.
Support and Retention
The patient should be instructed to leave dentures out for how long prior to the final impression appt?
24 hours
Describe the four actions of border molding for a maxillary impression.
- Pucker lips around finger and tray handle
- Produce a maximal smile line
- Open wide and move mandible laterally (pterygomandibular raphe and coronoid process)
- Plug nose and hold tongue down - ask patient to blow through nose (find vibrating line)
Describe the 5 key actions to create a mandibular border molding.
- Suction around finger and tray handle
- Produce maximal smile line
- Pronounce “christmas”, “Q”, and “U”. Pull lower lip over the tray
- Close against resistance in intervals
- Move tongue and swallow
What two muscles lead to the postero-lateral borders of the mandibular impression tray?
Buccinator and masseter
What muscle leads to the medial/lingual border of the mandibular impression?
Mylohyoid
How much material is loaded into the tray for the final impression?
2-3 mm
T/F: Minimal pressure should be used in taking final impressions.
TRUE
T/F: Women typically show more teeth with the resting lip than men.
TRUE
What material are the denture teeth made from?
Polymethylmethacrylate
T/F: Anterior teeth should be placed directly over the ridge.
FALSE
On average, the distance from the center of the incisive papillae to the labial surface of the central incisor is ____ mm.
8-10 mm
How can the incisive papilla show where the canine tips should be?
Transverse Line passing through the posterior portion of the papilla will define where the cusp tips should be
During what sounds should the central incisors contact the wet-dry line?
F and V
T/F: The maxillary lingual cusps should be centered over the posterior residual ridge.
True
T/F: The mandibular anterior teeth should not be placed beyond the center of the vestibule.
TRUE
T/F: Anatomic and semi-anatomic teeth are NOT indicated if they will oppose natural teeth.
FALSE
When would non-anatomic teeth be indicated?
When stability and retention are of great concern. Less inclined cusps will reduce risk of lateral displacement.
Describe lingualized occlusion.
Anatomic upper teeth set so that only the lingual cusp will contact non-anatomic lower teeth
What are the functions of the record bases and occlusion wax rims?
- Establish facial contours
- Aid in orientation of occlusal plane
- Establish VDO
How thick should the occlusal rim be?
Molar region: 8-10mm
Permolar region: 5-7mm
Anterior: 3-5mm
The maxillary occlusal rim should be ___ mm tall from the front and ____ mm tall from the posterior.
22mm; 8mm
The mandibular occlusion rim should be ___ mm high in the front and should extend posteriorly to ___ the height of the retromolar pad.
18 mm; 2/3
What is the ideal nasiolabial angle?
95 degrees
T/F: There should be a 1-2 mm horizontal overlap between maxillary and mandibular wax rims.
True
T/F: There must be a 2-4 mm space between the rims to account for the interocclusal distance.
True
T/F: The anterior maxillary teeth are all set with a slight distal inclination.
True
When setting mandibular teeth we want a ____ mm vertical overlap, a ____ mm horizontal overlap, and (contact or no contact) between the maxillary and mandibular teeth.
1-2 mm; 1-2 mm; No contact
