the single denture Flashcards
natural teeth generate a _____ chewing force against opposing dentures
greater
natural teeth _______ in function as a denture does
do not move
______ puts natural teeth far from optimal positions
drifting/tilting
routine resorption pattern following extraction of teeth results in a SMALLER MAXILLA when compared to denture arch
centripetal resorption
maxilla resorbs:
mand resorbs:
up and inward
mand down and out
horizontal arch discrepancy is created when:
maxilla arch narrows and becomes shorter in A-P direction
what may be required to direct occlusal forces to the bearing area when a horizontal arch discrepancy is created
cross-bite
-max complete denture opposed by mandibular anterior natural teeth
the combination syndrome
-maxillary anterior tissue mobile/hyperplasia
-inflammatory palatal hyperplasia (IPH)
-maxillary tuberosities enlarged
-mand posterior bone resorption
-mandibular anterior teeth supraerupted
combination syndrome
combination of curve of spee and the curve of wilson
curve of monson
what two planes are curve of monson
coronal and sagittal planes
____ for mand
___ for max
concave for mand
convex for max
in CR form a segment of a sphere of 4 inch radius with the center of the spehere at the glabella
curve of monson
reduce, restore or remove
occlusal plane (to level out)
a reciprocal arrangement of elevations and depressions
occlusion
single denture fractures:
bitting force of natural dentition is about ___ times that of the denture wearers
5 times
going over root or implant
overdenture
alveolar resorption.
mand anterior resorbs ___times as fast as max anterior
4 times
rapid bone less emphasizes the need for any procedure which will slow the bone loss
preventive prosthodontics
retaining mand ____ for overdentures preserved alveolar bone
canines
overdenture advantages:
1
2
3
4
5
6
- denture support is increased and soft tissue trauma is decreased
- stability of denture is increased
- maintenance of periodontal propriception improves chewing efficiency
- psychological benefit to patient
- residual ridge integrity
- retention
when overdentures?
- when conventional denture would have poor prognosis
- when opposing an arch of natural teeth
- when combination syndrome is a factor
disadvantages of overdentures:
1
2
3
4
5
6
7
8
- likely time dependent transition to CD, depends on patient’s oral hygiene and nature of selective abutments
- age related and inability to follow proper hygiene
- presence of refractory periodontal disease
- caries
- frequent recall appts
- available interarch space
- weakness in arylic denture base
- cast coping- increases lab procedures/expenses
cost more than conventional denture
denture is bulkier in some areas
denture is more subjective to fracture
caries/perio sequelae
disadvantages of overdentures
3 things on selection of abutment teeth
- periodontal and mobility statys (horizontal bone loss)
- abutment location (canines/premolars)
-at least ONE TOOTH PER QUAD, no adjacent teeth - endodontic and prosthodontic status:
anteriors easy for endo
what treatment is recommended for most overdenture abutments
root canals
periodontal evaulation.
what does not eliminate a tooth for use as an abutment?
what ratio is improved (mobility lessened) when crown is reduced on the tooth?
tooth mobility
crown/root ratio
what teeth are most frequently selected for abutments and why
canines
larger roots
amenable to RCT
strategic location at corners of arch
abutment failure
caries or periodontal
restorations for abutment
amalgam, cast gold copings
surgical guide is required for
implant overdenture
implant bars
design for hygiene
