Restoration of RCT Tooth - ANTERIOR

Question 1

What are the restorative treatment option for an anterior tooth following RCT?

Answer 1

INTACT MARGINAL RIDGES
- Composite restoration

INTACT MARGINAL RIDGES & DISCOLOURED CROWN

• Bleaching
• Veneer
• Crown

DESTROYED MARGINAL RIDGES
- Post crown

Question 2

What are the guidelines for placement of a post?

Answer 2

TOOTH ANATOMY

• Insufficient coronal dentine
  
  • -> Avoid in lower incisors, curved canals

ROOT LENGTH
- 4-5mm root filling apically

POST WIDTH
- No more than 1/3 of root width at narrowest point

POST LENGTH

• At least half into root
• 1:1 post length to crown ratio

FERRULE
- At least 1.5mm height and width

Question 3

What materials are available for posts?

Answer 3

METAL

• Cast gold
• SS
• Titanium

CERAMIC

• Alumina
• Zirconia
• Porcelain fused to metal

FIBRE

• Glass
• Quartz
• Carbon

Question 4

What are the causes of fracture of a restored RCT tooth?

Answer 4

PRIMARY CAUSES

• Tooth structure loss
• Dehydration of dentine tubules
• Age induced changes in dentine

SECONDARY CAUSEs

• Effects of endo irrigant and or medicaments on dentine
• Effects of bacterial interaction with dentine
• Biocorrosion of metallic post-core