Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A Odonto II. > W6 - Fixed partial dentures - DOWEL CORE RESTORATIONS > Flashcards

W6 - Fixed partial dentures - DOWEL CORE RESTORATIONS Flashcards

1
Q

What are the 3 types of fixed prosthetic appliances?

A

1.Extracoronal
2.Intracoronal
3.Intrradicular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are 5 fixed extracoronal dental appliances that are not used for replacing missing teeth?

A
  • Full coverage crown - endocrown
  • Partial coverage crown
  • Veneer: vestibular veneer, palatinal veneer, occlusal veneer - table top
  • Splint
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are 3 fixed extracoronal dental appliances that are used for replacing missing teeth?

A
  • Bridges
  • Special bridges: winglike (extracoronal); inlay (intracoronal) retention bridges)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the fixed intracoronal appliances?

A

Inlay, Onlay and Overlay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the fixed intraradicular dental appliances that are not used for replacing missing teeth?

A

Indirect dowel core restorations
-Post and core
-Post

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the fixed intraradicular dental appliances that are used for replacing missing teeth?

A

Direct dowel core restorations
- Metal post
- §Filler reinforced composite post

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the indications of dowel core restoration?

A

*to retain restoration
*to protect remaining tooth structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the contraindications of dowel core restoration?

A
  • Anatomical malformations: severe curvatured root, short root
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the 4 conditions of intraradicular restorations?

A
  • Complete root canal filling
  • Presence of minimally requested tooth structure which provides ferrule effect
  • No periapical lesions
  • Minimal length of the root is 8- 10 mm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

DOWEL CORE RESTORATIONS PREPARATION - CORONAL PART
1. What are the Principles of tooth preparation according to Schillinburg?

A
  1. Preservation of tooth structure
  2. Retention and resistance form
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

DOWEL CORE RESTORATIONS PREPARATION - CORONAL PART
2. What are general principles of tooth preparation?

A
  1. Axial wall convergence (5–8°) 

  2. Chamfer preparation / line of demarcation 

  3. Avoid leaving behind very thin tooth stucture, sharp edges – special casts (epoxy resin or polyurethan)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

DOWEL CORE RESTORATIONS PREPARATION - CORONAL PART
3. What is the question of undercut areas?

A
  1. Indirect posts - remove
  2. Direct posts - minimal invasive preparation, we can leave undercut areas behind
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

DOWEL CORE RESTORATIONS PREPARATION - CORONAL PART
4. What is Ferrule effect ?

A

Proper Ferrule effect is ensured when after preparation there is a sound circumferential coronal dentin tissue, which is 1-1,5 mm wide and at least 1,5-2 mm high (Attention: fiber reinforced posts)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
1. What is the order?

A
  • Preparation of the root canal often comes before preparing the coronal part (e.g. we made the root canal filling before)
  • Suggested to start with the preparation of coronal surface(not enough tooth tissue – revision of treatment plan)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
2. How should the environment be for the root part of dowel core restoration?

A
  • Use a microscope

  • Absolute isolation (rubber dam)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
3. What are the steps of root part of Dowel core restorations?

A
  1. Remove root canal filling
- thermal (elecrtic or heated endodontic hand instruments)
    - mechanical (rotary devices and hand instruments)
    
- combination of the two
  2. Controll x-ray of the cleaned canal (with a measured radioopaque instrument/guttapercha)

!!! Chemical way is not recommended for removing the root canal filling, because it can cause microleakage in the apical area.

17
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
4. What are the general rules for post of root part of Dowel core restoration?

A
  • At least 2/3 of the root length or as long as the clinical crown of the tooth (extralong root - 3⁄4)in case of indirect metal posts!
  • 3-5 mm sound guttapercha apically
* The post should be 4 mm lower than the alveolar bone crest
18
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
5. What are the general rules for diameter of root part of Dowel core restoration?

A
  • 1/3 of root diameter or less [each millimeter of increase in the post diameter (beyond 1/3 of root diameter) leads to 6 times more chance of tooth fracture*]
  • We can start with Gates-Glidden or NiTi bur (carefully pulsating without water cooling, because of thermomechanical complications pl. frequent rinsing)
  • Antirotation cavity
19
Q

DOWEL CORE RESTORATIONS PREPARATION II - ROOT PART
6. What are the general rules for teeth with more roots of root part of Dowel core restoration?

A
  • Distal canal of lower molars
    
*Palatal canal of upper molars
  • Question of split posts
20
Q

What are the 2 types of Chairside direct posts, prefabricated posts?

A
  1. Metal prefabricated posts
  2. Fiber reinforced composite posts
21
Q

What are the features of metal fabricated posts?

A
  • temporary use
- Types: screw, granular,
    serrated or totally smooth surface
  • Shape: convergent or relatively parallel posts, which are only convergent apically
  • not esthetic because of metallic colour - fracture effect
- special bur kits
22
Q

What are the features of Fiber reinforced composite posts ?

A
  • definitive use
  • consists of two main materials (fiber and polimer martix)
  • anizotrop material
  • usually white, smooth surface

  • cementation: adhesive technic,
    rezin cement → monoblock system
    
- fiber: glass, polyetilen, silicate, carbon/graphite
    or zirconium-dioxid
23
Q

Why are there different stresses in the root dentin?

A

Different stresses in the root dentin caused by fiber reinforced composite post and metal post

24
Q

What are the 5 questions of adhesive technique

A
  1. Compensation of the remaining tooth structure
  2. Proper planning and execution (stability of the post depends more on friction, than the strength of adhesive cementation)
  3. 2,5-3 mm high dentin tissue needed for proper ferrule effect (indirect metal post needs only 1,5-2 mm!)

  4. Pretreating post with silane or sand-blasting
  5. Wide root canal
25
Q

What are the steps of cementation of fiber reinforced composite post?

A

1.Trying in
2.Building up with composite
3.Finsihing

26
Q

What are the 2 types of Indirect posts are made in the dental laboratory?

A
  1. Post and core
  2. Post
27
Q

How do we take impression for dowel core restoration?

A

Indirect ways - Conventional impression taking, digital impression taking

Direct ways - Custom made in the chair

A Odonto II. (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions