Removable Treatment Planning Flashcards
Basics of the removable prosthetic exam:
- existing prosthesis
- tissue condition (previous denture?)
- muscle attachment (frenum)
- interocclusal distance
- interarch distance
- ridge form (class relation, tuberosities?)
Which is more likely to “pop” a denture loose: high or low frenal attachment?
high frenal attachment (on the crest)
To determine the VDO, have an edentulous patient close until ______.
the ridges are parallel
How much separation is necessary between the retromolar pad and opposing arch?
at least 3 mm
What is a critical area to check when evaluating for dentures?
lateral to the maxillary tuberosities
Describe a “good” tissue condition.
Firm
Pink
Describe a “bad” tissue condition.
hyperplastic
erythematous
mobile
When planning for an RPD, high buccal frenums would eliminate the possibility for which clasp type?
i-bar
What is a tissue condition that is a contraindication for the i-bar clasp?
soft tissue undercut
What is interocclusal distance? What is the ideal measurement?
rest position to MIP
ideal = 3 mm
What are five types of ridge form?
square rounded knife edge flat negative
What is a “negative ridge form?”
when the ridge is lower than the buccal shelf
-caused by long time wear of ill-fitting denture
Describe which areas must be examined on the maxilla.
undercuts
Torus palitinus
Hard palate form
House’s Palatal form
What are the various hard palate forms?
flat
v-shaped
rounded
u-shaped
Which are good and which are bad palatal forms for dentures?
BAD -flat -v-shaped GOOD -rounded -u-shaped
Why is a flat palate bad?
decreases retention
What is “House’s Palatal Form” classification?
- classes defined by slope-to-hard palate
- influences palatal seal and retention
House’s Class I
minimal slope to hard palate
- easiest for patients to handle denture
- allows broad posterior palatal seal
House’s ClassII
greater slope to hard palate
- most common
- medium posterior palatal seal
House’s Class III
almost 90 degree slope to hard palate
- most difficult for patients
- narrow posterior palatal seal
Describe the areas for examination of the mandible.
undercuts
tori
lateral throat form
tongue position
Lateral throat form directly influences stability of the _____ denture.
mandibular
Lateral throat form is measured between the____, ____ and _____ by placing a mirror head and asking patient to _____.
floor of mouth, tongue, and retromolar pad
stick out their tongue
Class I lateral throat form is classified by a depth of _____ mm.
greater than 20 mm (mirror head fits)
