1 - Interim/Immediate Denture, Partially Edentulous Cast, Lab 1 (Record Base and Articulation) Flashcards
1
Vibrating line
2
Hamular notch
3
Tuberosity fossa
4
Posterior palatial seal
5
Median palatine Raphe
6
Fovea palatinae
7
Rugae
8
Incisive papilla
9
Coronmaxillary space
10
Residual ridge
11
labial flange
12
labial notch
13
buccal notch
14
buccal flange
1
retromolar pad
2
retromylohyoid fossa
3
lingual flange
4
lingual frenum
5
buccal shelf
6
residual ridge
7
buccal flange
8
buccal frenum
9
labial flange
10
labial frenum
11
masseter groove
what constitutes terminal dentition
> 60% bone loss, Class II/III mobility on remaining teeth
3 types of dentures
- interim dentures
- immediate dentures
- conventional dentures
what denture:
patient has dentition that will be removed and prosthesis will be delivered day of surgery
can be interim or immediate
what denture:
prosthesis is temporary or healing denture, not seen as a definitive denture
interim
what denture:
patient will wear this denture during first 6 months of healing prior to having a definitive denture made
interim dentures
what denture:
prosthesis will be their definitive denture post extraction, includes limited follow up and does not include a reline or rebase following extrations
immediate dentures
what denture:
definitive denture usually made 6-8 months post extractions
conventional dentures
can you use the same codes for interim, immediate, and complete dentures?
NO! different codes for insurance
cost of each type of denture
- interim complete - $349
- interim partial - $236
- complete denture - $663
- partial denture (metal framework) - $663
why do interim dentures (8)
- promote better healing
- promote better ridge form
- prevents collapse of facial musculature
- accelerates patient adaptation to dentures
- promote psychological and social well being (less embarassment)
- promotes patient health
- provides guide for optiomal pt esthetics
- provides guide for VDO
challenges of interim dentures (6)
- increase complexity of clinical procedures
- limited eval of trial dentures
- increased patient discomfort
- increase denture maintenance
- increased patient visits
- increased treatment cost
contraindications for interim dentures (4)
- poor general health
- poor surgical risks
- uncooperative because do not understand scope, demands, and limitations for tx
- extensive tooth loss, severe caries or periodontal disease
what are the poor surgical risks of interim dentures (3)
- systemic conditions affect healing, blood clotting, cardiac or endocrine disturbances
- psychological disorders
- head and neck radiation patients
a denture prosthesis is not a ___ for one’s natural teeth… rather, it is an ___ to having ___
replacement; alternative; nothing
what do dentures rest on
movable and displaceable living tissue
why is it important to have impressions capture specific anatomy when completing denture?
so that the denture has a peripheral seal (retention, stability and support from the edentulous arch) since it is resting on movable and displaceable living tissue
what do you look at during ORAL EXAM
- soft tissues
- ridge and alvolar contours
- teeth
- potential PRDP abutments or over denture support roots
- jaw relation, occlusal plane, and VDO
what is orange arrow
keratinized tissue
what is pink arrow
non keratinized tissue
what is green arrow
muscle attachments/frenum attachments
tuberosities
what are you examining for on alveolar ridge
- anatomy (tuberosities, tori)
- ridge relationship (Class I, II, III)
- height/width
- contours (undercuts)
- shape of arch (U/V shaped)
what are the different arch shapes
- U shape (taller = more retention and support)
- V shape (tall, narrow, more difficult to wear)
what are clinical conditions that suggest need for teeth extractions
- Advanced periodontal disease with severe bone loss around the teeth
- Severely broken-down crowns with subgingival residual tooth tissue that cannot be adequately restored
- Fractured roots
- Periapical or periodontal abscesses that cannot be successfully treated
- Unfavorably tipped or inclined teeth that pose problems for their use as abutments for fixed or removable prostheses
- Extruded or tipped teeth that interfere with the proper location of the occlusal plane and are not amenable to prosthodontic modification.
T/F: when placing anterior teeth, we are using educated guesses for placement
TRUE
what questions should be answered to manage patient expectations
- what are the benefits of having denture vs. other options
- how long will denture last
- what are the limitations of the denture
- how much will denture cost
preparation of patient for interim/immediate dentures
- primary impressions at NRT or tx planning appointment
- custom trays with holes
- make final impressions w/ alginate in custom trays
- select teeth mould/shade, design interim partial if applicable on cast
- articulate case, set selected teeth
- lab gives you yellow card to process OS appointment
- schedule OS appointment with delivery
when creating a final impression, you should have patient keep partial denture out for ___ hours prior to appointment. why?
24 hours - so that tissue can go back to normal
how thick should vestibule and land area be on casts
3-4 mm
what does it mean for patient to have tripod of stops with their teeth
2 posterior stops, 1 anterior stop
how should patient bite when taking face bow record
max interucuspation
what do you do if patient does not have a tripod of stops
you must schedule another Jaw Relation Record appointment to evalulate VDO and facebow records since we have to make record bases on the impressions
what records the orientation of the maxilla to the terminal hinge axis and provides the same relatiev opening on the articulator as the mandible to the TMJ
face bow (ear bow)
what impression material do you use to record tripod of stops
Clone Bite or O bite
T/F: facebow is the same as making a CR record or MIP record
FALSE! facebow is NOT THE SAME as making CR record or MIP record
when fabricating record bases that do not have enough posterior stops, where should the outline of the record base go?
- depth of vestibule
- HOC of teeth
- undercuts
the Triad of record base should extend to what surface of the teeth
lingual surfaces
what is wrong with this final cast for MD interim denture
- horseshoe shaped cast
- mandibular record not adapted well to teeth
what is wrong with this cast
teeth fractured because alginate wasn’t removed soon enough
when drawing outline for record base Triad, do the anterior teeth have to go to the depth of the vestibule?
no
how long do you cure Triad
2 min each side
you must do what do your pink baseplate wax if using clonebite/aluwax for bite registration
tripod of notches
