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_Complete Removable Pros > 5 - 3/6: The Single Denture > Flashcards

5 - 3/6: The Single Denture Flashcards

1
Q

What is the most common situation that a single denture is needed?

A
  • maxillary arch is edentulous
  • mandibular arch has natural/restored teeth
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2
Q

What do natural teeth generate against opposing dentures?

A

Greater chewing force

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3
Q

Natural teeth do/do not move in function as denture does

A

Do not

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4
Q

What puts natural teeth far from optimal positions?

A

Drifting/tilting

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5
Q

What is centripetal resorption?

A

!!!!!!
Routine resorption pattern following extraction of teeth results in a smaller maxilla when compared to denture arch
- maxilla resorbs UP and INWARD

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6
Q

When is a horizontal arch discrepancy created?

A

When the maxillary arch narrows and becomes shorter in A-P direction

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7
Q

What can a crossbite be required for?

A

Direct occlusal forces to the bearing area

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8
Q

What is the combination syndrome?

A

Maxillary CD opposed by mandibular anterior natural teeth

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9
Q

What things make up the combination syndrome?

A
  • maxillary ant tissue mobile/hyperplasia
  • inflammatory palatal hyperplasia (IPH)
  • maxillary tuberosities enlarged
  • mandibular posterior bone resorption
  • mandibular anterior teeth supraerupted
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10
Q

What is the curve of monson?

A

Combination of curve of Spee and curve of Wilson

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11
Q

What planes does the curve of monson include?

A

Coronal and sagittal planes

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12
Q

Is the curve of monson concave or convex for the mandibular arch?

A

Concave

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13
Q

Is the curve of monson concave or convex for the maxillary arch?

A

Convex

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14
Q

What does the curve of monson form in centric occlusion?

A

Segment of a sphere of 4 inches radius with the center of the sphere at the glabella

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15
Q

What 3 R’s should be considered when referring to the occlusal plane?

A

Reduce, restore, or remove

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16
Q

What is occlusion?

A

Reciprocal arrangement of elevations and depressions

17
Q

Biting force of natural dentition is approx ______ times that of the denture wearers

A

5 times

18
Q

What components make up the natural/edentulous mandible?

A
  • discuss the likely poor outcome
  • resilient liner in mandibular denture
  • osseointegrated implants in mandible
19
Q

In regards to alveolar resorption, the mandibular anterior resorbs approx _____ times as fast as maxillary anterior

A

4 times

20
Q

What does rapid bone loss emphasize?

A

“preventative prosthodontics”
The need for any procedure which will slow the bone loss

21
Q

What did Crum RJ and rooney GE study show?

A

Retaining mandibular canines for overdentures preserved alveolar bone

22
Q

What are advantages of overdentures?

A
  • denture support is increased and soft tissue trauma is decreased
  • stability of denture is increased
  • maintenance of periodontal proprioception improves chewing efficiency
  • physiological benefit to patient
  • resitual ridge integrity: improved stress distribution
  • stability and retention
  • patient’s perception of preserved natural teeth
  • viable and simple alternate technique to CD
  • application is virtually unlimited
23
Q

When should you consdier overdentures?

A
  • when a conventional denture would have poor prognosis
  • when opposing an arch of natural teeth
  • when “combination syndrome” is a factor
24
Q

What are disadvantages of overdentures?

A
  • cost: more $ than conventional denture- RCT, copings
  • denture is bulkier in some areas
  • denture more subject to fracture
  • caries/perio sequelae
  • likely time dependent transition to CD, depends on patient’s oral hygeine and nature of selected abutments
  • age related inability to follow proper hygeine
  • presence of refractory periodontal disease
  • caries
  • frequent recall appointments, expense
    -available interarch space
  • weakness in acrylic denture base
  • cast coping: increases lab procedures/expenses
25
Q

What needs to be considered when selecting abutment teeth?

A
  1. Periodontal and mobility status (horizontal bone loss)
  2. Abutment location (canines/premolars) - at least one tooth per quadrant, no adjacent teeth
  3. Endodontic and prosthodontic status
26
Q

What are the endodontic/prosthodontic statuses?

A
  • anteriors easy for endo
  • in cases of calcification- endo can be avoided
  • crowns can be modified - sealant/fluoride t/t use of copings, composite/alloyrestorations retention attachment system
27
Q

What is recommended for mot overdenture abutments?

A

Root canal treatment

28
Q

What doesn’t eliminate a tooth for use as an abutment?

A

Tooth mobility

29
Q

What is improved when crown is reduced on the tooth?

A

Crown/root ratio (mobility lessened)

30
Q

What teeth are most frequently selected for abutments?

A

Canines
- have large roots
- amenable to RCT
- strategic location at corner of arches

31
Q

What are problems with abutments?

A

Abutment failure- caries or periodontal
Denture fracture - metal base

32
Q

What are causes for abutment loss?

A

Periodontal disease, caries, endodontic complications

33
Q

What causes gingivitis around abutment?

A
  1. Movement of denture base
  2. Poor oral hygeine
  3. Excess space in prosthesis (dead space)
34
Q

What are types of restorations used for abutments?

A

Amalgam
Cast gold copings

35
Q

Describe the locator root attachment?

A

A supra-radicular design that gives you the choice of a straight post and two angles (10 and 20 degrees) to accomodate divergent roots and a special cast to version

36
Q

What is required for an implant overdenture?

A

Surgical guide

37
Q

What are implant bars designed for?

A

Hygeine

38
Q

What does it mean if an implant is retained and supported?

A

No pressure on the ridge

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