The Single Denture Flashcards

1
Q

the most common situation (2)

A

 Maxillary arch is edentulous
 Mandibular arch has natural / restored teeth

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2
Q

natural teeth opposing a CD (4)

A

natural teeth generate greater chewing force against opposing denture
natural teeth do not move in function as denture does
cannot control placement of opposing teeth
drifting/tilting puts natural teeth far from optimal positions

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3
Q

centripetal resorption (2)

A

 Routine resorption pattern following
extraction of teeth results in a smaller maxilla
when compared to dentate arch.
 Maxilla resorbs UP and INWARD!

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4
Q

arch discrepancy (2)

A

a horizontal arch discrepancy is created when the max arch narrows and becomes shorter in the AP direction
a crossbite may be required to direct occlusal forces to the bearing area

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5
Q

uncontrolled occlusal forces
 Maxillary CD opposed by mandibular
anterior natural teeth:

A

“THE COMBINATION SYNDROME”

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6
Q

“THE COMBINATION SYNDROME”
(5)

A

max ant tissue mobile/hyperplasia
inflammatory palatal hyperplasia (IPH)
max tuberosities enlarged
mand poster bone resorption
mand anterior teeth supraerupted

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7
Q

curve of monson
(4)

A

combo of curve of spee and wilson
coronal and sagittal planes
concave for the mand arch and convex for the max arch
the CO form a segment of a sphere of 4 inches radius with the center of the sphere at the glabella

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8
Q

occlusal plane

A

reduce restore remove

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9
Q

occlusion on the single denture

A

Interdigitation……cusp in fossa

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10
Q

occlusion

A

a reciprocal arrangement of elevations and depressions

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11
Q

single denture fractures

A

Biting force of natural dentition is approx 5
times that of the denture wearers (160 vs 35
lbs)

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12
Q

the edentulous mandible opposing max natural dentition

A

Rapid loss of mandibular alveolar bone

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13
Q

natural/edentulous mandible (3)

A

 Discuss the likely poor outcome
 Resilient liner in mandibular denture
 Osseointegrated implants in mandible

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14
Q

Mandibular anterior resorbs approx – times
as fast as maxillary anterior

A

4

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15
Q

Rapid bone loss emphasizes the need for any
procedure which will

A

slow the bone loss.

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16
Q

A 5-year study showed that retaining — for overdentures
preserved alveolar bone

A

mandibular canines

17
Q

overdenture adv (4)

A

denture support is increased and soft tissue trauma is decreased
stability of the denture is increased
maintenance of periodontal proprioception improves chewing efficiency
psychological benefit to the pt

18
Q

adv of overdentures (5)

A

residual ridge integrity - improved stress distribution
stability and retention
patients perception of preserved natural teeth
viable and simple alternative technique to CD
application is virtually unlimited

19
Q

when overdentures? (3)

A

 When a conventional denture would have a
poor prognosis
 When opposing an arch of natural teeth
 When “Combination Syndrome” is a factor

20
Q

disadv overdentures (8)

A

llikely time dependent transition to CD depends on patients oral hygiene and nature of selected abutments
age related inability to follow proper hygiene
presence of refractory PD
caries
frequent reall appointments, expense (endo and restoration)
available interarch space
weakness of acrylic denture base
cast coping -increases lab procedures/expeneses

21
Q

overdentures disadv (4)

A

Cost– more $ than conventional denture-
RCT, copings
 Denture is bulkier in some areas
 Denture more subject to fracture
 Caries / perio sequelae

22
Q

selection of abutment teeth (3)

A

PD and mobility status (horizontal bone loss)
abutment location (canine/premolars), at least one tooth per quad, no adjacent teeth
endo and prosth status

23
Q

endo and prosth status

A

anteriors easy for endo,
in cases of cacification -endo can be avoided
crowns can be modified -sealant/fluoride tray,
use of copings, composite / alloy restorations
retention attachment system

24
Q

— treatment is recommended for
most overdenture abutments

A

Root canal

25
Q

perio eval (2)

A

tooth mobility does not eliminate a tooth for use as an abutment
crown/root ratio is improved (mobility lessened) when crown is reduced on the tooth

26
Q

abutments canines most frequently selected (3)

A

 Canines have large roots
 Amenable to RCT
 Strategic location at corner of arches

27
Q

Abutment failure –
 Denture fracture –

A

caries or periodontal
metal base ?

28
Q

loss of abutment teeth
after 5-6 yrs about –% of abutments were lost
causes: PD, caries, endo complications
motivation for hygienic care - mechanical toothbrushes
one tooth overdentures were not tolerated
fluoride gel for daily application

A

10

29
Q

gingivities around abutment (3)

A

movement of denture base
poor oral hygiene
excess space in prosthesis (dead space)

use of tissue conditioner
use of hard acrylic resin

30
Q

restorations (2)

A

 Amalgam
 Cast gold copings

31
Q

— requred

A

surgical guide

32
Q

implant bars

A

design for hygeine

33
Q

implant-retained, implant-supported

A

no pressure on the ridge

34
Q
A