Restoration of anterior endoodntically treated teeth

Question 0

What are the functions of a core?

Answer 0

1) Foundation for coronal retsoration
2) Support and stabilise coronal restoration
3) Act as an interim restoration

Question 1

What are the indirect options for restoraing an endodontically treated anterior tooth?

Answer 1

1) resin veneer/ crown
2) Ceramic veneer/ crown
3) Cost post and core/ crown
4) Cast post and attachment (stud, magnet)
5) Non-alloy post/core + crown

Question 2

What are the functions of a post?

Answer 2

1) Retain the core
2) Stabilise the core
3) OBturation of the post canal

Question 3

What are the design parameters when using a post?

Answer 3

1) Length needs to be at least as long as the crown
2) Retain the apical seal (4-5mm)
3) Correct angle into root canal
4) Do not overprepare canal

Question 4

What are the contraindications to using a post?

Answer 4

1) If the core can be retained wihtout a post.
2) Tooth non-restorable
3) Short, thin roots, carious roots
4) Bennds/ blockages in the root canal
5) Existing root pathology
6) Poorr periodontal support
7) Endo filled canals withoout a coronal seal (3 months or longer)

Question 5

What is the ‘ferrrule effect’ and why is it desirable?

Answer 5

The retention provided from the preserved circumferential collar of dentine apicalto the core (ferrule) which assists in crown retention andd provides resistance to ‘splitting’ of the root in the vertical and oblique plane.
A ferrrule of 1.5 to 2mm is desirable.

Question 6

How can an anti-rotation device be used when preparing the canal and how can fracture resistance be maximised?

Answer 6

A small notch placed in the canal. However, best to do this ddistal as dentine in the Me-Di plane should be preserved as much as possible to minimise chance of fracture.