Tooth Preparation Flashcards

1
Q

What are the 4 phases of the restorative treatment plan?

A
  1. Immediate treatment
  2. Initial (hygienic or preparatory phase)
  3. Reconstructive (corrective) phase
  4. Maintenance
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2
Q

What methods can be used to alter or design a denture?

A
  1. Initial prosthetic treatment
  2. Repairs and additions
  3. Temporary relines
  4. Occlusal adjustment
  5. Treatment of denture stomatitis
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3
Q

What aspects of mouth preparation must be considered when designing a denture?

A
  1. Remove retained roots/unerupted teeth
  2. Remove pathology
  3. Improve contours of Edentulous areas - by reducing bony prominences and hyper plastic soft tissue
  4. Eliminate prominent fraenal attachments
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4
Q

What aspects of periodontal treatment or important to assess when designing a denture?

A
  1. Establishing health in periodontal tissues
  2. Assess patient motivation
  3. Detailed OHI
  4. Scaling and root planing
  5. Periodontal surgery
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5
Q

When can orthodontic treatment be useful in mouth preparation for dentures?

A
  1. To optimise space
  2. To optimise abutment alignment
  3. Cleft patients, hypodontia patients, periodontal patients
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6
Q

How should fixed orthodontic treatment be considered in relation to RPD design?

A
  1. It should follow denture design and precede denture construction
  2. Establish clinical integrity of teeth before master impressions are recorded
  3. Facilitates provision of crowns (and/or teeth)
    With guide planes, rest seats etc
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7
Q

Why is tooth preparation for rpds necessary?

A
  1. Provide rest seats
  2. Establish guide surfaces
  3. Modify unfavourable survey lines
  4. Create retentive areas
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8
Q

What is the purpose of rest seat preparation?

A
  1. Produce favourable tooth surface for support
  2. Prevent interference with occlusion
  3. Reduce prominence of the rest
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9
Q

What features are useful for tooth preparation on maxillary canines?

What tool should be used for preparation

A

Well developed Cingulum allows prep to stay within enamel.

Use a cylindrical diamond stone with a rounded tip

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10
Q

Anterior mandibular teeth have poorly developed cingulum and the lingual surface is too vertical to avoid penetrating enamel, what alternative method is suggested for rest seats

A

Incisal rest seats

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11
Q

What is a more aesthetically pleasing alternate to an incisal rest seat?

A
  1. Produce a rest seat in composite applied to cingulum area

2. Bond a cast metal cingulum to tooth

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12
Q

What is the purpose of a rest seat on a posterior tooth?

A

Reduce marginal ridge

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13
Q

What shape should a posterior tooth rest seat be and why?

A

Saucer shaped to allow some horizontal movement and dissipation of occlusal forces

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14
Q

How deep should a posterior rest seat be?

A

Deep enough to allow a rest of at least 1mm thick

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15
Q

What are guide planes?

A

Two or more parallel axial surfaces on abutment teeth, which limit the path of insertion of a denture

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16
Q

What do guide planes provide in a RPD?

A
  1. Increased stability
  2. Reciprocation
  3. Prevention of clasp deformation
  4. Improved appearance
17
Q

How can retentive areas be created in the mouth in preparation for RPD’s

A

Addition of acid etched composite:

  • need a broad area of attachment of the restoration to the enamel
  • use ultra fine or hybrid composites
18
Q

What impression material is a better alternative to alginate due to its superior stability, meaning it will not shrink or be distorted over time

A

Polyvinylsiloxane e.g. extrude (medium body)