Imbrey Article Flashcards
What is preferred for sealing of the canals and floor of the pulp chamber?
Glass ionomer or composite resin
What must be done to the sealed canals before sealing with GI or composite resin?
Counter sink with a round bur
What type of restoration is indicated for restoring endo treated teeth?
Bonded restoration to prevent microleakage
What indicated immediate restoration after endo due to the fact that they are hard to maintain a temporary seal?
post space
What is a key when restoring the coronal portion of the tooth?
Preservation of tooth structure
What is the primary purpose of a post?
Retain a core in a tooth with extensive loss of coronal tooth structure
Posts should only be used when?
When other options are not available to retain a core
What determines if an anterior tooth requires a core?
- The amount of remaining coronal tooth structure
2. Functional requirements of the tooth
Why do premolars often require a post for retention?
Single-rooted with small pulp chambers more susceptible to lateral forces than molars
What is the ability of a post to resist vertical dislodging forces?
Post retention
Post retention is influenced by what?
- Post length
- Diamter
- Taper
- Luting cement
- Active or passive
Which are more retentive: tapered or parallel posts?
Tapered
Which post and core material fail the most?
- Fiber post
- Ferrule prepped tooth
- Composite core
What is a vertical band of tooth structure at the gingival aspect of a crown preparation?
Ferrule
What are the 2 main things a ferrule offers a tooth?
- Resistance
2. Enhance longevity
What is another consideration when treatment planning a post?
Retrievability during RETX. Ceramic and Zirconium are difficult to retrieve, while metals are easier
What is the post design for a thin rooted tooth with delicate morphology?
Tapered post
Why are custom cast post and cores not as favorable beyond the 2 appointments and lab fee?
Temporization does not prevent contamination
Why are resin cements preferred for luting the post in the canal?
- Increase retention
- Leak less
- Short term strengthening
What is the purpose of the core?
Retain the crown
What are the principles for clinical success of endo treated teeth?
- Avoid bacterial contamination of root canal system
- Provide cuspal coverage for posterior teeth
- Preserve radicular and coronal tooth structure
- Use posts with adequate strength in thin diameter
- Provide adequate post length for retention
- Maximize resistance form including an adequate ferrule
- Use posts that are retrievable
What type of post should you not use because of inadequate strength and difficult to retrieve?
Titanium
What posts are unretrievable or difficult to retrieve?
- Titanium alloys
- Active threaded posts
- Ceramic and Zirconium
The current trend in clinical practice is what type of post?
Fiber
Which are easier to remove: carbon fiber or ceramic posts?
Carbon fiber
Are carbon fiber posts radiolucent or radiopaque?
Radiolucent
Which types of posts are difficult to retrieve?
Ceramic and Zirconium
Which posts cannot be etched?
Zirconium
Which are stronger: ceramic or metal posts?
Metal
Which types of posts have a modulus similar to that of dentin?
Carbon fiber
Are carbon fiber posts radiopaque or radiolucent?
Radioluceny
Are the physical and mechanical properties of dentin the same after root canal therapy as they were before?
Yes. No change.
What is true of micro leakage?
- Bacterial coronal leakage can reach the apex in a matter of days
- Endotoxins can reach the apex sooner than bacterial leakage
True or False: The quality of restorative dentistry performed after root canal therapy impacts the long term prognosis of the tooth.
True
True or False: if there is a delay in placing a definitive restoration, an intra-coronal barrier should be placed using davit or IRM?
True (I guess?)
Does increasing the post diameter lead to excessive removal of radicular dentin?
Yes
Which are more retentive: parallel posts or tapered posts?
Parallel
Which are more retentive: active or passive?
Active
True or False: The clinician who performs the endodontic treatment should prepare the post space?
True
